Publications

Year: 2020 DOI:10.1016/j.combustflame.2020.03.004

Incipient soot
Particle size distribution
Dimethyl ether

Morphology of soot sampled from N2-diluted methane/air counterflow flames at elevated pressures via TEM imaging

H.M.F. Amin, A. Bennett, W.L. Roberts

Combustion and Flame 216, 92-99 (2020)

Year: 2020 DOI:10.1016/j.combustflame.2020.02.017

Soot morphology
Counterflow flame
Primary Particle Size
Pressurized flame
Thermophoretic sampling

Stability limits and exhaust NO performances of ammonia-methane-air swirl flames

A.A. Khateeb, T.F. Guiberti, X. Zhu, M. Younes, A. Jamal, W.L. Roberts

Experimental Thermal and Fluid Science 114, 110058 (2020)

Year: 2020 DOI:10.1016/j.expthermflusci.2020.110058

Ammonia
Methane
Swirl flame
Stability limits
NO

Characteristics of a non-reacting spray from an outwardly opening hollow-cone injector with high-reactivity gasolines

J. Du, E. Cenker, J. Badra, J. Sim, W.L. Roberts

Fuel 268, 117293 (2020)

Year: 2020 DOI:10.1016/j.fuel.2020.117293

Liquid penetration length
Hollow-cone spray
Piezoelectric injector
High-reactivity gasoline fuels

Studying ignition delay time of lubricant oil mixed with alcohols, water and toluene in IQT and CVCC

S. Maharjan, A.M. Elbaz, H. Mitsudharmadi, W.L. Roberts

SAE Technical Paper, 2020-01-1422

Year: 2020 DOI:10.4271/2020-01-1422

Ignition timing
Lubricating oils
Combustion chambers
Combustion and combustion processes

Assessment of the stabilization mechanisms of turbulent lifted jet flames at elevated pressure using combined 2-D diagnostics

T.F. Guiberti, W.R. Boyette, Y. Krishna, W.L. Roberts, A.R. Masri, G. Magnotti

Combustion and Flame 214, 323-335 (2020)

Year: 2020 DOI:10.1016/j.combustflame.2020.01.001

Ramanography
Raman
OH-PLIF
CH2O-PLIF
Edge-flame
Premixed flame

Soot characteristics of high-reactivity gasoline under compression-ignition conditions using a gasoline direct injection (GDI) piezoelectric fuel injector

L. Wang, Z. Wu, J.A. Badra, W.L. Roberts, T. Fang

Fuel 265, 116931 (2020)

Year: 2020 DOI:10.1016/j.fuel.2019.116931

Two-color pyrometry
Auto-ignition
Soot
High-reactivity gasoline
Gasoline direct injection engine

Auto-ignition characteristics of high-reactivity gasoline fuel using a gasoline multi-hole injector

J. Du, B. Mohan, J. Sim, T. Fang, W.L. Roberts

Experimental Thermal and Fluid Science 112, 109993 (2020)

Year: 2020 DOI:10.1016/j.expthermflusci.2019.109993

Ignition delay
Diffusion combustion mode
Low carbon fuel

Stability and structure of inverse swirl diffusion flames with weak to strong swirl

A.M. Elbaz, W.L. Roberts

Experimental Thermal and Fluid Science 112, 109989 (2020)

Year: 2020 DOI:10.1016/j.expthermflusci.2019.109989

Turbulent Combustion
Inverse swirling flame
Flame stability
Flame structure

Fuel and equivalence ratio effects on transfer functions of premixed swirl flames

F. D. Sabatino, T.F. Guiberti, J.P. Moeck, W.L. Roberts, D.A. Lacoste

Journal of Propulsion and Power 36 (2), 271-284 (2020)

Year: 2020 DOI:10.2514/1.B37537

Burners for conversion of methane to olefins, aromatics, and nanoparticles

S.M. Sarathy, R. Dibble, W.L. Roberts

US Patent App. 16/340,566 (2020)

Year: 2020

Patent

Study of spray collapse phenomenon at flash boiling conditions using simultaneous front and side view imaging

J. Du, B. Mohan, J. Sim, T. Fang, W.L. Roberts

International Journal of Heat and Mass Transfer 147, 118824 (2020)

Year: 2020 DOI:10.1016/j.ijheatmasstransfer.2019.118824

Flash boiling
Spray collapse
Plume interaction
Gasoline direct injection (GDI) engine
Front
Side view comparison

Investigating soot parameters in an ethane/air counterflow diffusion flame at elevated pressures

H.M.F. Amin, W.L. Roberts

Combustion Science and Technology, 1-16 (2020)

Year: 2020 DOI:10.1080/00102202.2020.1715964

Light scattering
Soot
Counterflow
Laminar Flame
Primary Particle Size

Auto-ignition of a hexadecane droplet mixed with different octane number fuels at elevated pressures to investigate the pre-ignition behavior

H. Mitsudharmadi, S. Maharjan, A.M. Elbaz, Y.A. Qahtani, W.L. Roberts

Energy & Fuels 2020, 34, 806−816 (2020)

Year: 2020 DOI:10.1021/acs.energyfuels.9b02540

Hydrocarbons
Fossil fuelsMixtures
Liquids
Lipids

A preliminary investigation of the secondary flame and operational properties of an actively-valved pulse jet

X. Zhu, J.C. Lisanti, T.F. Guiberti, W.L. Roberts

AIAA Scitech 2020 Forum

Year: 2020 DOI:10.2514/6.2020-0922

Pressure Gain Combustion

Experimental and analytical study on liquid and vapor penetration of high-reactivity gasoline using a high-pressure gasoline multi-hole injector

J. Du, B. Mohan, J. Sim, T. Fang, W.L. Roberts

Applied Thermal Engineering 163, 114187 (2019)

Year: 2019 DOI:10.1016/j.applthermaleng.2019.114187

Fuel Spary
High Reactivity Fuel
Penetration correlation
Liquid and vapor phase

Characterizing flash boiling sprays of E10 gasoline from a high-pressure gasoline multi-hole injector

J. Du, B. Mohan, J. Sim, J. Chang, T. Fang, W.L. Roberts

SAE Technical Paper, 2019-01-2249 (2019)

Year: 2019 DOI:10.4271/2019-01-2249

Gasoline
Ethanol
Gasohol

Characterization of turbulence in an optically accessible fan-stirred spherical combustion chamber

O.A. Mannaa, M.S. Mansour, S.H. Chung, W.L. Roberts

Combustion Science and Technology, 1-27 (2019)

Year: 2019 DOI:10.1080/00102202.2019.1686629

Turbulence
time-resolved PIV
stereoscopic PIV
high-pressure high-temperature (HPHT) combustion chamber
spherical flame

Effect of propagation speed on the quenching of methane, propane and ethylene premixed flames between parallel flat plates

A.M. Mahuthannan, J.S. Damazo, E. Kwon, W.L. Roberts, D.A. Lacoste

Fuel 256, 115870 (2019)

Year: 2019 DOI:10.1016/j.fuel.2019.115870

Flame arrester
Tube quenching
Flame stretch
Turbulence quenching
Heat transfer

Development of a high-pressure hot-corrosion burner rig for testing structural materials following long exposures to arabian extra light crude oil combustion products

S. Saxena, J. McIntosh, Z. Dawood, A. Maloney, R. Carolan, H. Mitsudharmadi, A. Chen, W. L. Roberts, K. S. Giri, B. Mohammad, P. Glaser, J. Goldmeer

ASME Turbo Expo 2019- GT2019-90576 (2019)

Combustion
Corrosion
Crude Oil

Influence of the laminar burning velocity on the transfer functions of premixed methane and propane swirl flames

F. D. Sabatino, T.F. Guiberti, J.P. Moeck, W.L. Roberts, D.A. Lacoste

ASME Turbo Expo 2019- GT2019-90870 (2019)

Year: 2019 DOI:10.1115/GT2019-90870

Combustion
Fuels and Emissions

Theoretical study of PAH growth by phenylacetylene addition

Z. Li, P. Liu, P. Zhang, H. He, S.H. Chung, W.L. Roberts

The Journal of Physical Chemistry A 123 (47), 10323-10332 (2019)

Year: 2019 DOI:10.1021/acs.jpca.9b09450

Hydrocarbon fuels
Chemical Reactions
Aromatic Compounds
Cyclization
Elimination Reactions

Evolution of oxygenated polycyclic aromatic hydrocarbon chemistry at flame temperatures

P. Liu, B. Chen, Z. Li, A. Bennett, S. Sioud, S.M. Sarathy, W.L. Roberts

Combustion and Flame 209, 441-451 (2019)

Year: 2019 DOI:10.1016/j.combustflame.2019.08.018

Polycyclic aromatic hydrocarbons (PAH)
OPAH
Soot
JSR
Kinetics

Macroscopic non-reacting spray characterization of gasoline compression ignition fuels in a constant volume chamber

J. Du, B. Mohan, J. Sim, T. Fang, W.L. Roberts

Fuel 255, 115818 (2019)

Year: 2019 DOI:10.1016/j.fuel.2019.115818

Gasoline compression ignition (GCI)
High reactivity gasoline-like fuel
Regression model
Evaporating
Liquid and vapor penetration

High-speed imaging of turbulent non-premixed syngas flames at elevated pressures

W.R. Boyette, T.F. Guiberti, A.M. Elbaz, W.L. Roberts

Flow, Turbulence and Combustion 103 (4), 871-885 (2019)

Year: 2019 DOI:10.1007/s10494-019-00040-0

High pressure
Turbulent non-premixed flame
Syngas

Tracer-free laser-induced grating spectroscopy using a pulse burst laser at 100 kHz

F.D. Domenico, T.F. Guiberti, S. Hochgreb, W.L. Roberts, G. Magnotti

Optics express 27 (22), 31217-31224 (2019)

Year: 2019 DOI:10.1364/OE.27.031217

Characterization of deasphalted heavy fuel oil using APPI (+) FT-ICR mass spectrometry and NMR spectroscopy

A.G.A. Jameel, A. A. Khateeb, A.M. Elbaz, A.H. Emwas, W. Zhang, W.L. Roberts, S.M. Sarathy

Fuel 253, 950-963 (2019)

Year: 2019 DOI:10.1016/j.fuel.2019.05.061

Asphaltenes
Heavy fuel oil
APPI (+) FT-ICR mass spectrometry
1H and 13C NMR spectroscopy

Optimization of specimen preparation methods for cryo electron microscopy of oil-and-water emulsions

D.H. Anjum, P. Guida, A.R. Behzad, S. Saxena, W.L. Roberts

Microscopy and Microanalysis 25 (S2), 2428-2429 (2019)

Year: 2019 DOI:10.1017/S143192761901287X

A new OH fluorescence signal-to-OH mole fraction conversion model formulation and calibration

L. Angelilli, P. P. Ciottoli, R. M. Galassi, T. Guiberti, W. Boyette, F. H. Perez, G. Magnotti, W. L. Roberts, M. Valorani and H. G. Im

AIAA, 2020-1279, (2020)

Year: 2020 DOI:10.2514/6.2020-1279

The site effect on PAHs formation in HACA-based mass growth process

P. Liu, Z. Li, A. Bennett, H. Lin, S.M. Sarathy, W.L. Roberts

Combustion and Flame, 199, pp. 54-68, (2019)

Year: 2019 DOI:10.1016/j.combustflame.2018.10.010

Temperature and water measurements in flames using 1064 nm Laser-Induced Grating Spectroscopy (LIGS)

F.D. Domenico, T.F. Guiberti, S. Hochgreb, W.L. Roberts, G. Magnotti

Combustion and Flame, 205, pp. 336-344, (2019)

Year: 2019 DOI:10.1016/j.combustflame.2019.04.016

Structure of turbulent nonpremixed syngas flames at high pressure

W.R. Boyette, T.F. Guiberti, G. Magnotti, W.L. Roberts

Proceedings of the Combustion Institute, 37 (2), pp. 2207-2214, (2019)

Year: 2019 DOI:10.1016/j.proci.2018.09.004

Small ester combustion chemistry: Computational kinetics and experimental study of methyl acetate and ethyl acetate

A. Ahmed, W.J. Pitz, C. Cavallotti, M. Mehl, N. Lokachari, E.J.K. Nilsson, W.J. Yang, A.A. Konnov, S.W. Wagnon, B. Chen, Z. Wang, S. Kim, H.J. Curran, S.J. Klippenstein, W.L. Roberts, S.M. Sarathy

Proceedings of the Combustion Institute 37 (1), 419-428, (2019)

Year: 2019 DOI:10.1016/j.proci.2018.06.178

Pressure effects and transition in the stabilization mechanism of turbulent lifted flames

T.F. Guiberti, W.R. Boyette, W.L. Roberts, A.R. Masri

Proceedings of the Combustion Institute, 37 (2), pp. 2167-2174, (2019)

Year: 2019 DOI:10.1016/j.proci.2018.08.033

Low NOX-LPG staged combustion double swirl flames

A.M. Elbaz, H.A. Moneib, K.M. Shebil, W.L. Roberts

Renewable Energy, 138, pp. 303-315, (2019)

Year: 2019 DOI:10.1016/j.renene.2019.01.070

In situ imaging studies of combustor pressure effects on soot oxidation

A.D. Sediako, A. Bennett, W.L. Roberts, M.J. Thomson

Energy & Fuels, 33 (2), pp. 1582-1589, (2019)

Year: 2019 DOI:10.1021/acs.energyfuels.8b03796

Experimental study on the non-reacting spray characterization of gasoline compression ignition fuel

J. Du, B. Mohan, J. Sim, W.L. Roberts

Energy Procedia, 158, pp. 1968-1973, (2019)

Year: 2019 DOI:10.1016/j.egypro.2019.01.453

Experimental investigation of the near field in sooting turbulent nonpremixed flames at elevated pressures

W.R. Boyette, A.M. Elbaz, T.F. Guiberti, W.L. Roberts

Experimental Thermal and Fluid Science, 105, pp. 332-341, (2019)

Year: 2019 DOI:10.1016/j.expthermflusci.2019.04.008

Environmental challenges and opportunities in marine engine heavy fuel oil combustion

A.G.A. Jameel, A. Alkhateeb, S. Telalović, A.M. Elbaz, W.L. Roberts, S.M. Sarathy

Proceedings of the Fourth International Conference in Ocean Engineering (ICOE2018), pp. 1047-1055, (2019)

Year: 2019 DOI:10.1007/978-981-13-3119-0_72

Determining fractal properties of soot aggregates and primary particle size distribution in counterflow flames up to 10 atm

H.M.F. Amin, A. Bennett, W.L. Roberts

Proceedings of the Combustion Institute, 37 (1), pp. 1161-1168, (2019)

Year: 2019 DOI:10.1016/j.proci.2018.07.057

Detachment mechanisms of turbulent non-premixed jet flames at atmospheric and elevated pressures

T.F. Guiberti, W.R. Boyette, A.R. Masri, W.L. Roberts

Combustion and Flame, 202, pp. 219-227, (2019)

Year: 2019 DOI:10.1016/j.combustflame.2019.01.019

Computational study of polycyclic aromatic hydrocarbons growth by vinylacetylene addition

P. Liu, Y. Zhang, Z. Li, A. Bennett, H. Lin, S.M. Sarathy, W.L. Roberts

Combustion and Flame, 202, pp. 276-291, (2019)

Year: 2019 DOI:10.1016/j.combustflame.2019.01.023

Cenosphere formation during single-droplet combustion of heavy fuel oil

L. Jiang, A.M. Elbaz, P. Guida, S.M. Al-Noman, I.A. AlGhamdi, S. Saxena, W.L. Roberts

Energy & Fuels, 33 (2), pp. 1570-1581, (2019)

Year: 2019

Auto-ignition of direct injection spray of light naphtha, primary reference fuels, gasoline and gasoline surrogate

L. Wang, Z. Wu, A. Ahmed, J.A. Badra, S.M. Sarathy, W.L. Roberts, T. Fang

Energy, 170, pp. 375-390, (2019)

Year: 2019 DOI:10.1016/j.energy.2018.12.144

An experimental/numerical investigation of the role of the quarl in enhancing the blowout limits of swirl-stabilized turbulent non-premixed flames

A.M. Elbaz, S. Yu, X. Liu, X.S. Bai, I. Khesho, W.L. Roberts

Fuel, 236, pp. 1226-1242, (2019)

Year: 2019 DOI:10.1016/j.fuel.2018.09.064

An experimental study of turbulent lifted flames at elevated pressures

T.F. Guiberti, W.R. Boyette, A.R. Masri, W.L. Roberts

Combustion and Flame, 203, pp. 301-312, (2019)

Year: 2019 DOI:10.1016/j.combustflame.2019.02.023

Turbulent burning characteristics of FACE-C gasoline and TPRF blend associated with the same RON at elevated pressures

O. Mannaa, P. Brequigny, C. Mounaim-Rousselle, F. Foucher, S.H. Chung, W.L. Roberts

Experimental Thermal and Fluid Science, 95, pp. 104-114, (2018)

Year: 2018 DOI:10.1016/j.expthermflusci.2018.02.019

The growth of PAHs and soot in the post-flame region

P. Liu, Z. Li, W. L. Roberts

Proceedings of the Combustion Institute, (2018)

Year: 2018 DOI:10.1016/j.proci.2018.05.047

The effect of pressure, temperature and additives on droplet ignition of lubricant oil and its surrogate

S. Maharjan, Y. Qahtani, W. Roberts, A. Elbaz

SAE Technical Paper, 2018-01-1673, (2018)

Year: 2018 DOI:10.4271/2018-01-1673

F. Bisetti, A. Abdelgadir, S.A. Steinmetz, A. Attili, W.L. Roberts

Combustion and Flame, 196, pp. 300-313, (2018)

Year: 2018 DOI:10.1016/j.combustflame.2018.06.023

PM from the combustion of heavy fuel oils

A.M. Elbaz, A.A. Khateeb, W.L. Roberts

Energy, 152, pp. 455-465, (2018)

Year: 2018 DOI:10.1016/j.energy.2018.03.163

PLIF measurements of non-thermal NO concentrations in alcohol and alkane premixed flames

M.D. Bohon, T.F. Guiberti, W.L. Roberts

Combustion and Flame, 194, pp. 363-375, (2018)

Numerical simulations of high reactivity gasoline fuel sprays under vaporizing and reactive conditions

B. Mohan, M. Jaasim, A. Ahmed, F.H. Perez, J. Sim, W.L. Roberts, S.M. Sarathy, H.G. Im

SAE Technical Paper, 2018-01-0292, (2018)

Year: 2018 DOI:10.4271/2018-01-0292

Measurements of pressure effects on PAH distribution and 2D soot volume fraction diagnostics in a laminar non-premixed coflow flame

A. Bennett, H.M.F. Amin, E. Cenker, W.L. Roberts

Energy & Fuels 32 (10), pp. 10974-10983, (2018)

Year: 2018 DOI:10.1021/acs.energyfuels.8b02179

Influence of fuel composition on the operation of a liquid fueled resonant pulse combustor

M. Qatomah, J.C. Lisanti, and W.L. Roberts

Joint Propulsion Conference, AIAA Propulsion and Energy Forum, (AIAA 2018-4571), (2018)

Year: 2018 DOI:10.2514/6.2018-4571

Influence of asphaltene concentration on the combustion of a heavy fuel oil droplet

A.A. Khateeb, A.M. Elbaz, P. Guida, W.L. Roberts

Energy & Fuels, 32 (12), pp. 12981-12991, (2018)

Year: 2018 DOI:10.1021/acs.energyfuels.8b03260

Impact of thermodynamic properties and heat loss on ignition of transportation fuels in rapid compression machines

A. Ahmed, M. Hantouche, M. Khurshid, S.Y. Mohamed, E.F. Nasir, A. Farooq, W.L. Roberts, O.M. Knio, S.M. Sarathy

Fuel, 218, pp. 203-212, (2018)

Year: 2018 DOI:10.1016/j.fuel.2018.01.030

Hydraulic characterization of high-pressure gasoline multi-hole injector

B. Mohan, J. Du, J. Sim, W.L. Roberts

Flow Measurement and Instrumentation, 64, pp. 133-141, (2018)

Year: 2018 DOI:10.1016/j.flowmeasinst.2018.10.017

Highly stabilized partially premixed flames of propane in a concentric flow conical nozzle burner with coflow

A.M. Elbaz, M.S. Senosy, M.F. Zayed, W.L. Roberts, M.S. Mansour

Experimental Thermal and Fluid Science, 95, pp. 2-10, (2018)

Year: 2018 DOI:10.1016/j.expthermflusci.2018.01.010

GDI fuel sprays of light naphtha, PRF95 and gasoline using a piezoelectric injector under different ambient pressures

Z. Wu, L. Wang, J. A. Badra, W. L. Roberts, T. Fang

Fuel, 223, pp. 294-311, (2018)

Year: 2018 DOI:10.1016/j.fuel.2018.03.009

Experimental and numerical study on oxidation deposition properties of aviation kerosene

X. Pei, L. Hou, and W.L. Roberts

Energy Fuels, 32 (7), pp. 7444-7450, (2018)

Year: 2018 DOI:10.1021/acs.energyfuels.8b01250

Fuel cooling system
Aviation kerosene

Effect of pressure on the transfer functions of premixed methane and propane swirl flame

F.D. Sabatino, T.F. Guiberti, W.R. Boyette, W.L. Roberts, J.P. Moeck, D.A. Lacoste

Combustion and Flame, 193, pp. 272-282, (2018)

Year: 2018 DOI:10.1016/j.combustflame.2018.03.011

Flame dynamics
Vortex roll-up
Phase-locked imaging
Flame transfer function
Elevated pressure

Effect of dimethyl ether (DME) addition on sooting limits in counterflow diffusion flames of ethylene at elevated pressures

Z. Li, H.M. F. Amin, P. Liu, Y. Wang, S.H. Chung, W.L. Roberts

Combustion and Flame, 197, pp. 463-470, (2018)

Year: 2018 DOI:10.1016/j.combustflame.2018.09.003

Soot
Sooting Limit
Dimethyl ether (DME)
High pressure
Counterflow diffusion flames

Analysis of the step responses of laminar premixed flames to forcing by non-thermal plasma

D. Lacoste, J. Moeck, W. Roberts, S. Chung, M. Cha

Proceedings of the Combustion Institute 36 (3),4145-4153, (2017)

Year: 2017

Plasma-assisted combustion
Flame dynamics
Nanosecond repetitively pulsed glow discharges
Flame transfer function
G-equation

Transfer functions of laminar premixed flames subjected to forcing by acoustic waves, AC electric fields, and non-thermal plasma discharges

D. Lacoste, Y. Xiong, J. Moeck, S. Chung, W. Roberts, M. Cha

Proceedings of the Combustion Institute, 36 (3), 4183-4192, (2017)

Year: 2017

Plasma-assisted combustion
Thermoacoustic instabilities
Nanosecond repetitively pulsed discharges
Combustion dynamics

Investigation of gas heating by nanosecond repetitively pulsed glow discharges used for actuation of a laminar methane-air flame

D. Lacoste, B. Lee, A. Satija, S. Krishna, S. Steinmetz, I. Alkhesho, O. Hazzaa, R. Lucht, M. Cha, W. Roberts

Combustion Science and Technology, 1-11, (2017)

Year: 2017

Atmospheric pressure plasma
Plasma-assisted combustion
Coherent Anti-Stokes Raman Spectroscopy

Characteristics of spray from a GDI fuel injector for naphtha and surrogate fuels

L. Wang, J. Badra, W. Roberts, T. Fang

Fuel, 190, 113-128, (2017)

Year: 2017

Gasoline direct injection (GDI)
Naphtha
Surrogate Spray penetration
Spray angle
Particle size distribution

Effect of burner geometry on swirl stabilized methane/air flames: A joint LES/OH-PLIF/PIV study

X.Liua, A. Albaz, C. Gong, X. Bai, H. Zheng, W. Roberts

Fuel, 207,533-546, (2017)

Year: 2017

PIV/OH-PLIFLES
Flame structures
Swirl stabilized flames
Burner quarl

Soot measurements by two angle scattering and extinction in an N2-diluted ethylene/air counterflow diffusion flame from 2 to 5 atm

H. Amin, W. Roberts

Proceedings of the Combustion Institute 36 (1), 861-869, (2017)

Year: 2017

Counterflow diffusion flames
Soot parameters
Scattering
High pressure

Simulation of MILD combustion using Perfectly Stirred Reactor model

Z. Chen, V. Reddy, S. Ruan, N. Doan, W. Roberts, N. Sawminathan

Proceedings of the Combustion Institute 36 (3), 4279-4286, (2017)

Year: 2017

Moderate or intense low-oxygen dilution (MILD)
Flameless combustion
Perfectly
Stirred
Reactor (PSR)
Jet in Hot Coflow (JHC)
Correlated joint PDF

Pulse combustor driven pressure gain combustion for high efficiency gas turbine engines

J. Lisanti, W. Roberts

Combustion for Power Generation and Transportation, 127-152, (2017)

Year: 2017

Energy Systems
Engineering Thermodynamics
Heat and Mass Transfer
Engine Technology

Fuel effects on the stability of turbulent flames with compositionally inhomogeneous inlets

T. Guiberti, M. Juddoo, D. Lacoste, M.Dunn, W. Roberts, A. Masri

Proceedings of the Combustion Institute 36(2), 1777-1784, (2017)

Year: 2017

Turbulent flames
Piloted flames
Inhomogeneous inlets
Flame stability

Soot, organics, and ultrafine ash from air- and oxy-fired coal combustion

M. Andersen, N. Modak, C. Winterrowd, C. Lee, W. Roberts, J. Wendt, W. Linak

Proceedings of the Combustion Institute 36 (3), 4029-4037, (2017)

Year: 2017

Oxy-coal combustion
Ultrafine fly ashLoss on ignition
Elemental carbon
Organic carbon

Effect of burner geometry on swirl stabilized methane/air flames: A joint LES/OH-PLIF/PIV study

Z. Lu, A.M. Elbaz, F.E.H. Perez, W.L. Roberts, H.G. Im

Fuel, volume 207, pp. 533-546, (2017)

Year: 2017

PIV/OH-PLIF
LES
Flame structures
Swirl stabilized flames
Burner quarl

Investigations of the long-term effects of LII on soot and bath gas

E. Cenker, A. Bennett, W.L. Roberts

Aerosol Science and Technology, pp. 1-14, (2017)

Year: 2017 ISSN:DOI: 10.1080/02786826.2017.1368444

Soot
Laser Induced Incandescence (LII)
Bath Gas Heating
TEM

Conical quarl swirl stabilized non-premixed flames: flame and flow field interaction

A. M. Elbaz, W. L. Roberts

Energy Procedia, volume 120, pp. 206-213, (2017)

Year: 2017

Conical swirl stabilized
Non-premixed flames
PIV/OH-PLIF

Heavy fuel oil pyrolysis and combustion: Kinetics and evolved gases investigated by TGA-FTIR

A.G.A. Jameel, Y. Han, O. Brignoli, S. Telalović, A.M. Elbaz, H.G. Im, W.L. Roberts, S.M. Sarathy

Journal of Analytical and Applied Pyrolysis, volume 127, pp. 183-195, (2017)

Year: 2017 ISSN:DOI: 10.1016/j.jaap.2017.08.008-6501/aa912b

Heavy fuel oil
TGA-FTIR
Pyrolysis
Combustion

Effects of hydrodynamics and mixing on soot formation and growth in laminar coflow diffusion flames at elevated pressures

A. Abdelgadir, I. Rakha, S. Steinmetz, A. Attili, F. Bisetti, W. Roberts

Combustion and Flame, 181, pp. 39-53, (2017)

Year: 2017 ISSN:DOI: 10.1016/j.combustflame.2017.01.003

Soot
Coflow flames
Pressurized flames
Ethylene
Scalar dissipation rate
Polycyclic aromatic hydrocarbons

Effects of fuel quantity on soot formation process for biomass-based renewable diesel fuel combustion

W. Jing, Z. Wu, W. Roberts, T. Fang

Journal of Engineering for Gas Turbines and Power, volume 139 (10), 102803, (2017)

Year: 2017 ISSN:DOI: 10.1115/1.4036292

Fuel quantity
Soot formation proces
Biomass-based fuel combustion

Performance and emissions of gasoline blended with terpineol as an octane booster

R. Vallinayagam, S. Vedharaj, W. Roberts, R. Dibble, M. Sarathy

Renewable Energy, 101, 1087-1093, (2017)

Year: 2017 ISSN:DOI: 10.1016/j.renene.2016.09.055

Terpineol
SI engine
Octane booster
Performance
Emission and gasoline

Time-averaged probability density functions of soot nanoparticles along the centerline of a piloted turbulent diffusion flame using a scanning mobility particle sizer

S. Chowdhury, W.R. Boyette, W.L. Roberts

Journal of Aerosol Science 106, 56-67, (2017)

Year: 2017

Turbulent non-premixed flame
Flame generated aerosols
Flame soot sampling
Soot nanoparticle size distribution
Soot probability density function
Scanning mobility particle sizer (SMPS)
Differential mobility analyzer (DMA)

Numerical modeling of MILD combustion at high pressure to predict the optimal operating conditions

V.M. Reddy, W.L. Roberts

Combustion for Power Generation and Transportation, 5576, (2017)

Year: 2017

MILD combustion
High pressure
Auto-ignition

Soot particle size distribution functions in a turbulent non-premixed ethylene-nitrogen flame

W. Boyette, S. Chowdhury, W.L. Roberts

Flow Turbulence Combustion, 1-14, (2017)

Year: 2017

Turbulent non-premixed flames
Soot
Particle size distribution function
Scanning mobility particle sizer
Differential mobility analyzer

Quantitative effects of rapid heating on soot-particle sizing through analysis of two-pulse LII

E. Cenker, W.L. Roberts

Applied Physics B, 123, 74, (2017)

Year: 2017

Soot particle size
LII modeling
Sublimation
Thermal annealing

Terpineol as a novel octane booster for extending the knock limit of gasoline

R. Vallinayagam, S. Vedharaj, N. Naser, W. L. Roberts, R. W. Dibble, S M. Sarathy

Fuel 187, 9-15, (2017)

Year: 2017

Terpineol
Octane booster
Ignition
Combustion
FACE gasoline
IQT

Effect of the mixing fields on the stability and structure of turbulent partially premixed flames in a concentric flow conical nozzle burner

M. S. Mansoura, A. M. Elbaz, W. L. Robertsc, M. S. Senosye, M. F. Zayedb, M. Juddoof, A. R. Masrif
Combustion and Flame, Vol. 175, 180200, (2017)

Year: 2017

Partially premixed
Inhomogeneity
Mixing field
Stability
Flow field
Rayleigh

Characteristics of spray from a GDI fuel injector for naphtha and surrogate fuels

L. Wanga, J. Badrah, W. Robertsc, T. Fanga
Fuel, volume 190, pages 113-128, (2017)

Year: 2017

Gasoline direct injection (GDI)
Naphtha
Surrogate
Spray penetration
Spray angle
Particle size distribution

Variations in non-thermal NO formation pathways in alcohol flames

M.D. Bohon, T.F. Guiberti, S.M. Sarathy, W.L. Roberts
Proceedings of the Combustion Institute, (2016)

Year: 2016

Proceedings of the Combustion Institute

Transfer functions of laminar premixed flames subjected to forcing by acoustic waves, AC electric fields, and non-thermal plasma discharges

D.A. Lacoste, Y. Xiong, J.P. Moeck, S.H. Chung, W.L. Roberts, M.S. Cha
Proceedings of the Combustion Institute, (2016)

Year: 2016

Plasma-assisted combustion
Thermoacoustic instabilities
Nanosecond repetitively pulsed discharges
Combustion dynamics

Terpineol as a novel octane booster for extending the knock limit of gasoline

R. Vallinayagam, S. Vedharaj, N. Naser, W. L. Roberts, R. W. Dibble, S M. Sarathy
Fuel 187, pp. 9-15, (2016)

Year: 2016

Terpineol
Octane booster
Ignition
Combustion
FACE gasoline
IQT

Spray combustion of biomass-based renewable diesel fuel using multiple injection strategy in a constant volume combustion chamber

W. Jing, Z. Wu, W.L. Roberts, T. Fang
Fuel, 181, 718-728, (2016)

Year: 2016

Biomass to liquid
BTL
Diesel
Spray combustion
Multiple-injection strategy
Two-color pyrometry

Investigation of the effects of quarl and initial conditions on swirling non-premixed methane flames: Flow field, temperature, and species distributions
A.M. Elbaz, W.L. Roberts
Fuel 169, 120-134, , (2016)

Year: 2016 ISSN:DOI: 10.1016/j.fuel.2015.12.015

Swirling non-premixed flames
Flow field
Gas concentration

Laminar Burning Velocities of Fuels for Advanced Combustion Engines (FACE) Gasoline and Gasoline Surrogates with and without Ethanol Blending Associated with Octane Rating
O.A. Mannaa, M.S. Mansour, W.L. Roberts, S.H. Chung
Combustion Science and Technology 188 (4-5), 692-706, (2016)

Year: 2016 ISSN:DOI: 10.1080/00102202.2016.1138812

Ethanol
Flame instability
Gasoline surrogates
Laminar burning velocity
Octane number

Laminar Flame Speeds of Gasoline Surrogates Measured with the Flat Flame Method
Y.H. Liao, W.L. Roberts
Energy & Fuels 30 (2), 1317-1324, (2016)

Year: 2016 ISSN:DOI: 10.1021/acs.energyfuels.5b01433

Gasoline surrogates
Flame method

Soot particle size measurements in ethylene diffusion flames at elevated pressures
S.A. Steinmetz, T. Fang, W.L. Roberts
Combustion and Flame 169, 85-93, (2016)

Year: 2016 ISSN:DOI: 10.1016/j.combustflame.2016.02.034

Soot
High pressure
Particle
Aggregate
Scattering

TG/DTG, FT-ICR mass spectrometry, and NMR spectroscopy study of heavy fuel oil

A.M. Elbaz, A. Gani, N. Hourani, A.H. Emwas, S.M. Sarathy, W.L. Roberts
Energy & Fuels 29 (12), 7825-7835, (2016)

Year: 2016 ISSN:DOI: 10.1021/acs.energyfuels.5b01739

Heavy fuel oil (HFO)
Thermogravimetric analysis (TGA)

Synthesis and utilization of catalytically cracked cashew nut shell liquid in a diesel engine

S. Vedharaj, R. Vallinayagam, W. M. Yang, C. G. Saravanan, W. L. Roberts

Experimental Thermal and Fluid Science, 70, 316-324, (2016)

Year: 2016 ISSN:DOI: 10.1016/j.expthermflusci.2015.09.026

CNSL (cashew nut shell liquid)
Catalytic cracking
Fuel injection pressure
CC-CNSL
Combustion
Emission

Cenosphere formation from heavy fuel oil: A numerical analysis accounting for the balance between porous shells and internal pressure

V. M. Reddy, M. M. Rahman, A. N. Gandi, A. M. Elbaz, R. A. Schrecengost and W. L. Roberts

Combustion Theory and Modeling

Year: 2015 ISSN:DOI: 10.1080/13647830.2015.1118556

Heavy fuel oil
Cenosphere
Numerical modelling
Pressure balance
Asphaltene

Experimental and numerical analysis for high intensity swirl based ultra-low emission flameless combustor operating with liquid fuels

V. M. Reddy, A. Katoch, W. L. Roberts, S. Kumar

Proceedings of the Combustion Institute 35 (3), 3581-3589 (2015)

Year: 2015 ISSN:DOI: 10.1016/j.proci.2014.05.070

Flameless combustion
Swirl flow combustion
Liquid fuel
High intensity
Burner scaling

Feasibility of using less viscous and lower cetane (LVLC) fuels in a diesel engine: A review

R. Vallinayagam, S. Vedharaj, W. M. Yang, W. L. Roberts, R. W. Dibble

Renewable and Sustainable Energy Reviews 51, 1166-1190, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.rser.2015.07.042

Less viscous and lower cetane (LVLC) fuels
Combustion
Emission
Diesel engine
Biofuels

A fundamental investigation into the relationship between lubricant composition and fuel ignition quality

O. A. Kuti, S. Y. Yang, N. Hourani, N. Naser, W. L. Roberts, S. H. Chung, ...

Fuel 160, 605-613, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.fuel.2015.08.026

Low speed pre-ignition (LSPI)
Direct injection spark ignition (DISI)
Ignition quality tester (IQT)
Lubricant base oils
Iso-octane
Total ignition delay

Synthesis of cracked Calophyllum inophyllum oil using fly ash catalyst for diesel engine application

N. Muthukumaran, C. G. Saravanan, S. P. R. Yadav, R. Vallinayagam, ...

Fuel 55, 68-76, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.fuel.2015.04.014

Calophyllum inophyllum oil
Cracking
Fly ash
Combustion
Emission
Diesel engine

The flow field structure of highly stabilized partially premixed flames in a concentric flow conical nozzle burner with coflow

A. M. Elbaz, M. F. Zayed, M. Samy, W. L. Roberts, M. S. Mansour

Experimental Thermal and Fluid Science, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.expthermflusci.2015.08.016

Partially premixed
Flames
Combustion
Stability
Flow field

Experiments and simulations of NO x formation in the combustion of hydroxylated fuels

M. D. Bohon, M. J. Al Rashidi, S. M. Sarathy, W. L. Roberts

Combustion and Flame 162 (6), 2322-2336, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.combustflame.2015.01.022

NOx
Alcohol
Swirl
Thermal
Prompt
Hydroxylated

Laminar burning velocities at elevated pressures for gasoline and gasoline surrogates associated with RON

O. S. Mannaa, M. S. Mansour, W. L. Roberts, S. H. Chung

Combustion and Flame 162 (6), 2311-2321, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.combustflame.2015.01.004

Laminar burning velocity
Gasoline surrogates
TRF
Spherical flame instability
RON

Fuel and engine characterization study of catalytically cracked waste transformer oil

S. P. R. Yadav, C. G. Saravanan, R. Vallinayagam, S. Vedharaj, W. L. Roberts

Energy Conversion and Management 96, 490-498, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.enconman.2015.02.051

Waste transformer oil
Cracking
Emission
Performance
Diesel engine
Fly ash

Technoeconomic analysis of jet fuel production from hydrolysis, decarboxylation, and reforming of camelina oil

R. H. Natelson, W. C. Wang, W. L. Roberts, K. D. Zering

Biomass and Bioenergy 75, 23-34, (2015)

Year: 2015 ISSN:DOI:10.1016/j.biombioe.2015.02.001

Camelina
Techno-economic model
Renewable jet fuel
Renewable diesel
Hydrotreating
Oil extraction

A computational methodology for formulating gasoline surrogate fuels with accurate physical and chemical kinetic properties

A. Ahmed, G. Goteng, V. S. B. Shankar, K. Al-Qurashi, W. L. Roberts, ...

Fuel 143, 290-300, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.fuel.2014.11.022

Gasoline
Combustion
Surrogate fuel
Formulation
Chemical kinetic simulation

Investigation of the effects of renewable diesel fuels on engine performance, combustion, and emissions

D. Ogunkoya, W. L. Roberts, T. Fang, N. Thapaliya

Fuel 140, 541-554, (2015)

Year: 2015 ISSN:DOI: 10.1016/j.fuel.2014.09.061

Biofuels
Renewable diesel
Diesel engines
Combustion
Emissions

Spray combustion of Jet-A and diesel fuels in a constant volume combustion chamber

W. Jing, W. L. Roberts, T. Fang

Energy Conversion and Management 89, 525-540, (2014)

Year: 2015 ISSN:DOI: 10.1016/j.enconman.2014.10.010

Spray combustion
Natural luminosity
OH* chemiluminescence
Diesel engines
Jet fuel

Soot measurements for diesel and biodiesel spray combustion under high temperature highly diluted ambient conditions

J. Zhang, W. Jing, W. L. Roberts, T. Fang

FUEL 135, 340-351, (2014)

Year: 2014 ISSN:DOI: 10.1016/j.fuel.2014.06.071

Biodiesel
Soot
Spray combustion
Two-color thermometry
High temperature highly diluted combustion

Experimental Characterization of Methane Inverse Diffusion Flame

A. M. Elbaz, W. L. Roberts

Combustion Science and Technology 186 (9), 1249-1272, (2014)

Year: 2014 ISSN:DOI: 10.1080/00102202.2014.920835

Annular fuel jet
Inverse diffusion flames
OH-PLIF
PIV measurements

Flame structure of methane inverse diffusion flame

A. M. Elbaz, W. L. Roberts

Experimental Thermal and Fluid Science 56, 23-32, (2014)

Year: 2014 ISSN:DOI: 10.1016/j.expthermflusci.2013.11.011

Inverse diffusion flames
PLIF-OH imaging
PIV measurements

Effects of Diluents on Soot Surface Temperature and Volume Fraction in Diluted Ethylene Diffusion Flames at Pressure

R. K. A. Kailasanathan, J. Zhang, T. Fang, W. L. Roberts

Combustion Science and Technology 186 (6), 815-828 (2014)

Year: 2014 ISSN:DOI: 10.1080/00102202.2013.878710

Elevated pressure
Laminar diffusion flame
Soot surface temperature
Soot volume fraction

Aromatization of n-Octane over Pd/C Catalysts

M. C. Yin, R. H. Natelson, A. A. Campos, P. Kolar, W. L Roberts

Fuel 103 408-413 (2013)

Year: 2013 ISSN:DOI: 10.1016/j.fuel.2012.06.095

Aromatization
Dehydrocyclization
Catalyst
Pd/C
Alkanes

Spray and Atomization of Diesel Fuel and its Alternatives from a Single-Hole Injector Using a Common Rail Fuel Injection System

P.-C. Chen, W.-C. Wang, W. L. Roberts, and T. Fang

Fuel 103 850-861 (2013)

Year: 2013

Biofuel
Diesel
Jet fuel
Common rail
High-pressure injection

Crude Glycerol Combustion: Particulate, Acrolein, And Other Volatile Organic Emissions

S. A. Steinmetz, J. S. Herrington, C. Winterrowd, W. L. Roberts, J. O. L. Wendt, and W. P. Linak

Proceedings of the Combustion Institute 34/2 2749-2757 (2013)

Year: 2013 ISSN:DOI: 10.1016/j.proci.2012.07.050

Glycerol combustion
Emission characterization
Bio-fuels
Acrolein measurements
Waste fuels

Hydrocarbon Species Concentrations in Nitrogen Diluted Ethylene-air Laminar Jet Diffusion Flames At Elevated Pressures
Ranjith Kumar A.K, E. K. Book, T. Fang, and W. L. Roberts
Proceedings of the Combustion Institute 34/11035-1043 (2013)

Year: 2013

Laminar flames
High pressure
Extractive sampling
Non-fuel hydrocarbons
Soot formation

NOx Emissions from High Swirl Turbulent Flames with Highly Oxygenated Fuels
M. D. Bohon and W. L Roberts
Proceedings of the Combustion Institute 34/1 1705-1712 (2013)

Year: 2013

NOx
Oxygenated fuel
Glycerol combustion
Emission characterization

Effect of Diluents on Soot Precursor Formation and Temperature at Elevated Pressures in Laminar Diffusion Flames

Ranjith Kumar A.K, T. L. B. Yelverton, T. Fang, and W. L. Roberts

Combustion and Flame 160/3 656-670 (2013)

Year: 2013 ISSN:DOI: 10.1016/j.combustflame.2012.11.004

Elevated pressure
Laminar diffusion flame
Diluent
Species concentration
Soot
Temperature

Soot temperature and KL factor for biodiesel and diesel spray combustion in a constant volume combustion chamber
J. Zhang, W. Jing, W. L. Roberts, and T. Fang
Applied Energy 107 52-65 (2013)

Year: 2013

Biodiesel
Diesel
Spray combustion
Two-color thermometry
Constant volume chamber

Environmental implications of iron fuel borne catalysts and their effects on diesel particulate formation and composition

D. G. Nash, N. B. Swanson, W. Preston, T. L. B. Yelverton, W. L. Roberts, J. O. L. Wendt, W. P. Linak

J. Aerosol Science 58 50-61 (2013)

Year: 2013 ISSN:DOI: 10.1016/j.jaerosci.2013.01.001

Ion Fuel-Borne
Diesel Particulate Emissions

Effects of Ambient Oxygen Concentration on Biodiesel and Diesel Spray Combustion Under Simulated Engine Conditions

J. Zhang, W. Jing, W. L. Roberts, and T. Fang

Energy 57 722-732 (2013)

Year: 2013

Biodiesel
Diesel
Spray combustion
Constant volume chamber
Chemiluminescence
Luminosity

Product Sampling during Transient Continuous Countercurrent Hydrolysis of Canola Oil and Development of a Kinetic Model
W.-C. Wang, R. H. Natelson, L.F. Stikeleather, and W.L. Roberts
Computers & Chemical Engineering 58 144-155 (2013)

Year: 2013

Hydrolysis
Triglycerides
Diglycerides
Free fatty acids

Effects Of Ambient Temperature And Oxygen Concentration On Diesel Spray Combustion Using A Single-Nozzle Injector In A Constant Volume Combustion Chamber

W. Jing, W. L. Roberts, and T. Fang

Combustion Science and Technology 185: 1378-1399 (2013)

Year: 2013

Diesel engine
Excess air ratio
Low-temperature combustion
Natural luminosity
OH* chemiluminescence
Spray combustion

ASI: Dunaliella Marine Microalgae to Drop-In Replacement Liquid Transportation Fuels

W.-C. Wang, E. Allen, A. A. Campos, R. K. Cade, L. Dean, J. G. Immer, S. Mixson, S. Srirangan, M-L Sauer, S. Schreck, K. Sun, N. Thapaliya, C. Wilson, J. Burkholder, A. M. Grunden, H. H. Lamb, H. Sederoff, L. F. Stikeleather, W. L. Roberts

Environmental Progress and Sustainable Energy 32, No 4, 916-925 (2013)

Year: 2013

Biofuels
Algal oils
Dunaliella
Microalgae
Deoxygenation

Semi-Batch Deoxygenation of Canola- and Lard-Derived Fatty Acids to Diesel-Range Hydrocarbons

J. P. Ford, N. Thapaliya, M. J. Kelly, W. L. Roberts, and H. H. Lamb

Energy and Fuels 27(12) 7489-7496 (2013)

Year: 2013

Canola
Lard-Derived Fatty Acids
Diesel-Range Hydrocarbons

Hydrocarbon Fuels from Vegetable Oils via Hydrolysis and Thermo-catalytic Decarboxylation
W.-C Wang, N. Thapaliya, A. Campos, L.F. Stikeleather, and W.L. Roberts
FUEL 95:1, 622-629 (2012)

Year: 2012

Biofuel production
Free fatty acid
Hydrocarbon fuels
Hydrolysis
Deoxygenation

Direct Injection of Superheated Steam for Continuous Hydrolysis Reaction
W.-C. Wang, R. H. Natelson, L.F. Stikeleather, and W.L. Roberts
Chem Eng Process; Proc Inten 59: 52-59 (2012)

Year: 2012

Continuous hydrolysis
Sweet water
Superheated steam
Glycerol
FFA
Biofuel production

Exploration of Process Parameters for Continuous Hydrolysis of Canola Oil, Camelina Oil and Algal Oil
W.-C. Wang, T.L. Turner, L.F. Stikeleather, and W.L. Roberts
Chem Eng Pocess; Proc Inter 57-57, 51-58 (2012)

Year: 2012

Continuous hydrolysis
Free fatty acid

CFD Simulation of Transient Stage of Continuous Countercurrent Hydrolysis of Canola Oil
W.-C Wang, R. H. Natelson, L.F. Stikeleather, and W.L. Roberts
Computers & Chemical Engineering, 43, 108-119 (2012).

Year: 2012

CFD
Continuous hydrolysis
Triglycerides
Free fatty acid
Biofuel production

Hydrocarbon Fuels from Gas Phase Decarboxylation of Hydrolyzed Free Fatty Acid
W.-C Wang, L.F. Stikeleather, and W.L. Roberts
ASME-Journal of Energy Resource Technology134:3 Sep (2012)

Year: 2012

Decarboxylation

Glycerol Combustion and Emissions
M. D. Bohon, B. A. Metzger, W. P. Linak, C. J. King, and W. L. Roberts
Proceedings of the Combustion Institute 33 2717-2724 (2011)

Year: 2011

Glycerol combustion
Emission characterization
Bio-fuels
Burner development
Waste fuels

Influence of Geometry on Starting Vortex and Ejector Performance

F. Zheng, A. V. Kuznetsov, W. L. Roberts, and D. E. Paxson

ASME Journal of Fluids Engineering 133:5 (2011)

Year: 2011

Vortex
Ejector

Comparison Between Numerically Simulated and Experimentally Measured Flowfield Quantities Behind a Pulsejet

T. Geng, F. Zheng, A. V. Kuznetsov, W. L. Roberts and D. E. Paxson

Flow, Turbulence and Combustion 84:4, 653-667 (2010)

Year: 2010

Flowfield
Pulsejet

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