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Plasma, Combustion and Fluid imaging (PCFi) Laboratory
Omid Askari, Associate Professor
Benjamin M. Statler College of Engineering and Mineral Resources
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Publications

Peer-Reviewed Journals (Google Scholar)

  1. Shaffer, J., Luna, S., Wang, W., Egolfopoulos, F. and Askari, O., 2023, "On the Ignition Kernel Formation and Propagation: An Experimental and Modeling Approach", Journal of Physics D: Applied Physics. https://doi.org/10.1088/1361-6463/acc411.
  2. Roy, S., Mishra, R., Askari, O., and Jarrahbashi, D., 2022, “Reduced Ethanol Skeleton Mechanism for Multi-Dimensional Engine Simulation”, Journal of Energy Institute, 106. https://doi.org/10.1016/j.joei.2022.11.007
  3. Zare, S. and Askari, O. , 2022, “Mode Transition and Uncertainty Analysis of Repetitive Nanosecond Pulsed Discharge”, Journal of Electrostatics, 118. https://doi.org/10.1016/j.elstat.2022.103736 
  4. Roy, S. and Askari, O. , 2022, “Detailed Kinetics for Anisole Oxidation under Various Range of Operating Conditions”, Journal of Fuel, 325, 124907. https://doi.org/10.1016/j.fuel.2022.124907
  5. Shaffer, J., Zare, S. and Askari, O. , 2022, "Electrode Design for Thermal and Nonthermal Plasma Discharge Inside a Constant Volume Combustion Chamber", J. Energy Resour. Technol, 144(8): 082306. https://doi.org/10.1115/1.4053142
  6. Hadi, F., Roy, S., Askari, O and Beretta, GP., 2021, " A Reformulation of Degree of Disequilibrium Analysis for Automatic Selection of Kinetic Constraints in the Rate-Controlled Constrained-Equilibrium Method", J. Energy Resour. Technol., JERT-21-1101. https://doi.org/10.1115/1.4050815
  7. Roy, S. and Askari, O. , 2020, “ A New Detailed Ethanol Kinetic Mechanism at Engine-Relevant Conditions”, Journal of Energy&Fuel, 34, 3691-3708. https://doi.org/10.1021/acs.energyfuels.9b03314
  8. Zare, S., Lo, H.W., Roy, S. and Askari, O. , 2020, “ On the Low-Temperature Plasma Discharge in Methane/Air Diffusion Flames”, Journal of Energy, 197 117185. https://doi.org/10.1016/j.energy.2020.117185
  9. Zare, S., Lo, H.W. and Askari, O. , 2020, “ Flame Stability in Inverse Coaxial Injector using Repetitive Nanosecond Pulsed Plasma”, J. Energy Resour. Technol., 142 (8). https://doi.org/10.1115/1.4046227
  10. Roy, S. and Askari, O. , 2020, “Study of the Constraint Selection through ASVDADD Method for Rate Controlled Constrained Equilibrium Modeling on Ethanol Oxidation without PLOG Reactions”, J. Energy Resour. Technol., 142 (7). https://doi.org/10.1115/1.4046526
  11. Kolahdooz, H., Nazari, M., Kayhani, M. H., Ebrahimi, R., and Askari, O. , 2019, “Effect of Obstacle Type on Methane-Air Flame Propagation in a Closed Duct: An Experimental Study,” J. Energy Resour. Technol. Trans. ASME, 141(11). https://doi.org/10.1115/1.4043790
  12. Kim, K., and Askari, O. , 2019, “Understanding the Effect of Capacitive Discharge Ignition on Plasma Formation and Flame Propagation of Air–Propane Mixture,” J. Energy Resour. Technol., 141(8), p. 082201. https://doi.org/10.1115/1.4042480
  13. Zare, S., Roy, S., El Maadi, A., and Askari, O. , 2019, “An investigation on laminar burning speed and flame structure of anisole-air mixture,” Journal of Fuel, 244, pp. 120–131. https://doi.org/10.1016/j.fuel.2019.01.149
  14. Roy, S., Zare, S., and Askari, O. , 2019, “Understanding the Effect of Oxygenated Additives on Combustion Characteristics of Gasoline,” J. Energy Resour. Technol., 141(2), p. 022205. https://doi.org/10.1115/1.4041316
  15. Yu, G., Metghalchi, H., Askari, O. , and Wang, Z., 2019, “Combustion Simulation of Propane/Oxygen (With Nitrogen/Argon) Mixtures Using Rate-Controlled Constrained-Equilibrium,” J. Energy Resour. Technol., 141(2), p. 022204. https://doi.org/10.1115/1.4041289
  16. Askari, O. , 2018, “Thermodynamic Properties of Pure and Mixed Thermal Plasmas Over a Wide Range of Temperature and Pressure,” J. Energy Resour. Technol., 140(3), p. 32202. https://doi.org/10.1115/1.4037688
  17. Yu, G., Askari, O. , and Metghalchi, H., 2018, “Theoretical Prediction of the Effect of Blending JP-8 With Syngas on the Ignition Delay Time and Laminar Burning Speed,” J. Energy Resour. Technol., 140(1), p. 12204. https://doi.org/10.1115/1.4037376
  18. Forghan, F., Askari, O. , Narusawa U., and Metghalchi, H., 2017, “Cooling of Turbine Blade with Expanded Exit Holes: Computational Analyses of Leading Edge and Pressure-Side of a Turbine Blade”, Journal of Energy Resources Technology, ASME, 139(5), p. 52001. https://doi.org/10.1115/1.4035829
  19. Askari, O. , Elia, M., Ferrari, M., and Metghalchi, H., 2017, “Cell Formation Effect on the Burning Speed and Flame Front Area of Synthetic Gas at High Pressures and Temperatures,” Applied Energy, 189, pp. 568-577. https://doi.org/10.1016/j.apenergy.2016.12.090
  20. Askari, O. , Wang, Z., Vein, K., Sirio M., and Metghalchi, H., 2017, “On the Flame Stability and Laminar Burning Speed of Syngas/Oxygen/Helium Premixed Flame,” Journal of Fuel, 190, pp. 90-103. https://doi.org/10.1016/j.fuel.2016.11.042
  21. Askari, O. , Elia, M., Ferrari, M., and Metghalchi, H., 2017, “Auto-Ignition Characteristics Study of Gas-to-Liquid Fuel at High Pressures and Low Temperatures,” Journal of Energy Resources Technology, ASME, 139(1), p.012204. https://doi.org/10.1115/1.4033983
  22. Yu, G., Askari, O. , Hadi, F., Wang, Z., Metghalchi, H., Kannaiyan, K., and Sadr, R., 2017, “Theoretical Prediction of Laminar Burning Speed and Ignition Delay Time of Gas-to-Liquid Fuel,” Journal of Energy Resource Technology, ASME, 139(2), p.022202. https://doi.org/10.1115/1.4033984
  23. Pedros, P., Askari, O. , and Metghalchi, H., 2016 “Reduction of Nitrous Oxide Emissions from Biological Nutrient Removal Processes by Thermal Decomposition”, Water Research, 106, pp. 304-311. https://doi.org/10.1016/j.watres.2016.10.007
  24. Askari, O. , Vien, K., Wang, Z., Sirio, M., and Metghalchi, H., 2016, “Exhaust Gas Recirculation Effects on Flame Structure and Laminar Burning Speeds of Hydrogen/CO/Air Premixed Flame at High Pressures and Temperatures,” Applied Energy, 179, pp. 451-462. https://doi.org/10.1016/j.apenergy.2016.06.118
  25. Askari, O. , Beretta, G. P., Eisazadeh-Far, K., and Metghalchi, H., 2016, “On the Thermodynamic Properties of Thermal Plasma in the Flame Kernel of Hydrocarbon/Air Premixed Gases,” European Physical Journal D, 70:159. https://doi.org/10.1140/epjd/e2016-70195-4
  26. Forghan, F., Askari, O. , Narusawa, U., and Metghalchi, H., 2016, “Cooling of Turbine Blade Surface with Expanded Exit Holes: Computational Suction-Side Analysis,” Journal of Energy Resources Technology, ASME, 138(5), p. 051602. https://doi.org/10.1115/1.4033590
  27. Askari, O. , Moghaddas, A., Alholm, A., Vein, K., Alhazmi, B., and Metghalchi, H., 2016, “Laminar Burning Speed Measurement and Flame Instability Study of Hydrogen/CO/Air Mixtures at High Temperatures and Pressures using a Novel Multi-Shell Model,” Combustion and Flames, 168, pp. 20–31. https://doi.org/10.1016/j.combustflame.2016.03.018
  28. Askari, O. , Janbozorgi, M., Greig, R., Moghaddas, A., and Metghalchi, H., 2015, “Developing Alternative Approaches to Predicting the Laminar Burning Speed of Refrigerants using the Minimum Ignition Energy,” Science and Technology for the Built Environment, 21(2), pp. 220–227. https://doi.org/10.1080/10789669.2014.975059
  29. Rokni, E., Moghaddas, A., Askari, O. , and Metghalchi, H., 2014, “Measurement of Laminar Burning Speeds and Investigation of Flame Stability of Acetylene/Air Mixtures,” Journal of Energy Resources Technology, ASME, 137(1), p. 012204. https://doi.org/10.1115/1.4028363
  30. Askari, O. , Metghalchi, H., Kazemzadeh Hannani, S., Hemmati, H., and Ebrahimi, R., 2014, “Lean Partially Premixed Combustion Investigation of Methane Direct-Injection under Different Characteristic Parameters,” Journal of Energy Resources Technology, ASME, 136(2), p. 022202. https://doi.org/10.1115/1.4026204
  31. Askari, O. , Metghalchi, H., Kazemzadeh Hannani, S., Moghaddas, A., Ebrahimi, R., and Hemmati, H., 2013, “Fundamental Study of Spray and Partially Premixed Combustion of Methane/Air Mixture,” Journal of Energy Resources Technology, ASME, 135(2), p. 021001. https://doi.org/10.1115/1.4007911
  32. Hajialimohammadi, A., Ahmadisoleymani, S., Abdullah, A., Askari, O. , and Rezai, F., 2012, “Design and Manufacturing of a Constant Volume Test Combustion Chamber for Jet and Flame Visualization of CNG Direct Injection,” Applied Mechanics and Materials, 217-219, pp. 2539–2545. https://doi.org/10.4028/www.scientific.net/AMM.217-219.2539
  33. Askari, O. , Hannani, S. K., and Ebrahimi, R., 2012, “Improvement and Experimental Validation of a Multi-Zone Model for Combustion and NO Emissions in CNG Fueled Spark Ignition Engine,” Mechanical Science and Technology, 26(4), pp. 1205–1212. https://doi.org/10.1007/s12206-012-0229-6
  34. Askari, O. , and Saidi, M. H., 2009, “Numerical Investigation of Fluid Flow and Heat Transfer Characteristics in Parallel Flow Single Layer Microchannels,” Scientia Iranica, 16(4), pp. 313–331. http://scientiairanica.sharif.edu/article_3236.html
  35. Askari, O. , and Saidi, M. H., 2009, “Approximate Method of Determining the Optimum Cross Section of Microhannel Heat Sink,” Mechanical Science and Technology, 23(12), pp. 3448–3458. https://doi.org/10.1007/s12206-009-1018-8
  36. Askari, O. , and Porkhial, S., 2008, “Numerical Analysis of a Geothermal Snow-melting System on a Typical Bridge”, Sharif Journal of Science & Technology, 23 (41-42), pp. 187-193.

Conference Papers

  1. Shaffer, J., and Askari, O., "High Pressure Spherically Expanding Laminar Flame Speed Measurement with Plasma Affected Data", AIAA SCITECH 2023 Forum, 2050, 23-27 January, National Harbor, MD.

  2. Shaffer, J., and Askari, O., "Investigation and Modeling of Equilibrium Plasma for Spherical Flame Initiation and Measurements", AIAA SCITECH 2023 Forum, 2058, 23-27 January, National Harbor, MD.

  3. Shaffer, J., and Askari, O., " Calibration and Uncertainty Assessment Tool with Uncertainty Minimization for Optimal High-Speed Camera Settings in Flame Propagation", International Mechanical Engineering Congress and Exposition, IMECE2022, October 30 - November 3, 2022, Columbus, OH.

  4. Shaffer, J., and Askari, O., " A New Method for Measuring the Laminar Burning Speed at High Pressures", Spring Technical Meeting, Eastern States Section of the Combustion Institute, March 6-9, 2022, Orlando, Florida.

  5. Shaffer, J., Zare, S. and Askari, O. , " Structure and Measurement of Atmospheric and High-Pressure Ignition Plasma ", International Mechanical Engineering Congress and Exposition, IMECE2021, Virtual Conference, November 1-5, 2021.
  6. Shaffer, J., Zare, S. and Askari, O. , " Modeling Discharge Spark Ignition Using Zero Dimension Thermodynamic Model and Experimental Power Measurements at Various Pressures ", International Mechanical Engineering Congress and Exposition, IMECE2021, Virtual Conference, November 1-5, 2021.
  7. Zare, S., Shaffer, J. and Askari, O. , " Analysis of Discharge Mode Transition in a Concentric Nanosecond Discharge", 12th U.S. National Combustion Meeting, Virtual, College Station, TX, May 24-26, 2021.
  8. Shaffer, J., Zare, S. and Askari, O. , " Kernel Growth in Air Spark Ignition: An Experimental and Theoretical Study" , 12th U.S. National Combustion Meeting, Virtual, College Station, TX, May 24-26, 2021.
  9. Shaffer, J., Zare, S. and Askari, O. , " Measurements of Transient Atmospheric Discharge to Determine Thermal Power and Energy in Plasma", 12th U.S. National Combustion Meeting, Virtual, College Station, TX, May 24-26, 2021.
  10. Roy, S. and Askari, O. , " Ethanol Mechanism Reduction Based on DRGEPSA Method at Various Operating Ranges", International Mechanical Engineering Congress and Exposition, IMECE2020, Virtual Conference, November 16-19, 2020.
  11. Roy, S. and Askari, O. , "Chemical Kinetic Study on Reaction Pathway of Anisole Oxidation at Various Operating Condition", International Mechanical Engineering Congress and Exposition, IMECE2020, Virtual Conference, November 16-19, 2020.
  12. Zare, S. and Askari, O. , "Instability Study of Repetitive Nanosecond Pulsed Discharge in a Plasma Assisted Burner", International Mechanical Engineering Congress and Exposition, IMECE2020, Virtual Conference, November 16-19, 2020.
  13. Shaffer, J. and Askari, O. , "A New Electrode Design for Constant Volume Combustion Chamber", Spring Technical Meeting, Central States Section of the Combustion Institute, Huntsville, Alabama, May 17–19, 2020.
  14. Roy, S. and Askari, O. , "A Study on Generation of Skeleton Mechanism for Ethanol Oxidation", Spring Technical Meeting, Central States Section of the Combustion Institute, Huntsville, Alabama, May 17–19, 2020.
  15. Roy, S. and Askari, O. , "A New Chemical Mechanism for Anisole Oxidation", Spring Technical Meeting, Central States Section of the Combustion Institute, Huntsville, Alabama, May 17–19, 2020.
  16. Zare, S. and Askari, O. , "Experimental Study of Repetitive Nanosecond Pulsed Discharge on Inverse Diffusion Flame", Spring Technical Meeting, Central States Section of the Combustion Institute, Huntsville, Alabama, May 17–19, 2020.
  17. Roy, S., Hadi, F., and Askari, O. , "Detailed Chemical Mechanism Generation for Combustion of Ethanol-Air Mixture", International Mechanical Engineering Congress and Exposition, IMECE2019, Salt Lake City, UT, November 11-14, 2019.
  18. Zare, S., Lo, H.W., Askari, O. , "Flame Stability in Inverse Coaxial Injector using Repetitive Nanosecond Pulsed Plasma", International Mechanical Engineering Congress and Exposition, IMECE2019, Salt Lake City, UT, November 11-14, 2019.
  19. Roy, S., Hadi, F., Askari, O. , "Rate Controlled Constrained-Equilibrium Simulation of Ethanol Combustion Using SVD Derived Constraints", International Mechanical Engineering Congress and Exposition, IMECE2019, Salt Lake City, UT, November 11-14, 2019.
  20. Roy, S., Zare, S. and Askari, O. , "Development of a New Chemical Mechanism for Ethanol-Air Mixture in a Wide Range of Temperature and Pressure", 11th U.S. National Combustion Meeting, Pasadena, California, March 24-27, 2019.
  21. Zare, S., Lo, H.W., El Maadi, A., Roy, S., Kim, K., Askari, O. and del Campo, F.G., "Understanding the Effect of Nanosecond Pulsed Discharge on Ignition and Flame Stability of Methane Jet Flames", 11th U.S. National Combustion Meeting, Pasadena, California, March 24-27, 2019.
  22. Zare, S., Roy, S. and Askari, O. , "On the Laminar Burning Speed and Spherical Flame Structure of Anisole-Air Premixed Mixture", 11th U.S. National Combustion Meeting, Pasadena, California, March 24-27, 2019.
  23. Kim, K., Roy, S., Zare, S. and Askari, O. , "Effect of Capacitive Discharge Ignition on Plasma Combustion of Propane-Air Mixture", 11th U.S. National Combustion Meeting, Pasadena, California, March 24-27, 2019.
  24. Roy, S., Zare, S., and Askari, O. , " Understanding the Effect of Oxygenated Biofuels Addition on Combustion Characteristics of Gasoline," International Mechanical Engineering Congress and Exposition, IMECE2018, Pittsburgh, PA, November 9-15, 2018.
  25. Zare, S., Onigbanjo, L.A., Roy, S. and Askari, O. , "Experimental Study on Laminar Burning Speed for Anisole/Air Mixture", Spring Technical Meeting, Central States Section of the Combustion Institute, May 20-22, 2018.
  26. Zare, S., Roy, S., Onigbanjo, L.A. and Askari, O. , "Experimental and Numerical Investigation of Flame Kernel Formation and Propagation in Methane/Air Mixtures", Spring Technical Meeting, Central States Section of the Combustion Institute, May 20-22, 2018.
  27. Askari, O. , “Calculation of Thermal Plasma Thermodynamic Properties for Arbitrary Gas Mixtures” International Mechanical Engineering Congress and Exposition, IMECE2017, Tampa, Florida, November 3-9, 2017.
  28. Yu, G., Askari, O. , Metghalchi, H., “Theoretical prediction of the effect of blending JP8 with syngas on the ignition delay time and laminar burning speed” Proceedings of ECOS 2017 - 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems July 2-July 6, 2017, San Diego, California, USA.
  29. Yu, G., Metghalchi1, H., Askari, O. , “Combustion simulation of Propane/Air mixtures using Rate-Controlled Constrained-Equilibrium”, 10th U. S. National Combustion Meeting Organized by the Eastern States Section of the Combustion Institute, April 23-26, 2017 College Park, Maryland.
  30. Elia, M., Ferrari, M., Askari, O. , and Metghalchi, H., “Mass burning rate of syngas/air mixtures and gas-to-liquid fuel auto-ignition at high temperatures and pressures”, International Mechanical Engineering Congress and Exposition, IMECE2016, Phoenix, Arizona, November 11-17, 2016.
  31. Yu, G., Askari, O. , Hadi, F., Wang, Z., Metghalchi, H., Kannaiyan, K., and Sadr, R., “Theoretical prediction of laminar burning speed and ignition delay of gas to liquid fuel”, International Mechanical Engineering Congress and Exposition, IMECE2016, Phoenix, Arizona, November 11-17, 2016.
  32. Askari, O. , Vien, K., Wang, Z., and Metghalchi, H., “Laminar burning speed and flame structure of syngas/oxygen/helium and syngas/air/EDG premixed flame” 1 2th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, HEFAT2016, Costa del sol, Spain, July 11-13, 2016.
  33. Askari, O. , Vien, K., Wang, Z., and Metghalchi, H., “The effect of diluent on flame structure and laminar burning speeds of H2/CO/oxidizer/diluent”, Spring Technical Meeting, Eastern States Section of the Combustion Institute, Hosted by Princeton University, March 13-16, 2016.
  34. Vien, K., Askari, O. , Wang, Z., Wang, X., and Metghalchi, H., "Laminar burning speed measurement, auto-ignition, and flame structure study of spherically expanding flames (SEFs)", 7th ISEES International Workshop on Sustainable Energy, Environment & Safety with Railway Centric Theme, Lucknow, India, December 21-23, 2015.
  35. Pedros, P.B., Askari, O. , and Metghalchi, H., “Reduction of nitrous oxide emissions from biological nutrient removal processes by thermal decomposition,” Water and Energy: Opportunities for Energy and Resource Recovery in the Changing World , Washington, DC, June 8-10, 2015.
  36. Askari, O. , Moghaddas, A., Alholm, A., Alhazmi, B., Aljanabi, A., and Metghalchi, H., “Laminar burning speed and burning rate measurement of H2/CO/air mixtures at high temperatures and pressures using a new multi-shell model,” 9th National Combustion Meeting, Cincinnati, Ohio, May 17-20, 2015.
  37. Forghan, F., Askari, O. , Narusawa, U., and Metghalchi, H., “Cooling of turbine blade surface with extended exit holes: parametric study”, ASME International Mechanical Engineering Congress & Exposition, Montreal, Quebec, Canada, November 14-20, 2014.
  38. Rokni, E., Moghaddas, A., Askari, O. , and Metghalchi, H.,, “Measurement of laminar burning speeds and investigation of flame stability of acetylene (C2H2)/air mixtures,“ ASME 8th International Conference on Energy Sustainability & 12th Fuel Cell Science , Boston, Massachusetts, June 29 - July 2, 2014.
  39. Forghan, F., Askari, O. , Narusawa, U., and Metghalchi, H., “Film cooling of turbine blade surface with extended exit holes”, ASME 8th International Conference on Energy Sustainability & 12th Fuel Cell Science , Boston, Massachusetts, June 29 - July 2, 2014.
  40. Askari, O. , Metghalchi, H., Kazemzadeh Hannani, S., Hemmati, H., and Ebrahimi, R., “Lean partially premixed combustion investigation of methane direct-injection under different characteristic parameters,” Internal Combustion Engine Division Fall Technical Conference, ICEF2013, ASME, Dearborn, Michigan, October 13-16, 2013.
  41. Moghaddas, A., Askari, O. , Rokni, E., Metghalchi, H., “Measurement of laminar burning speeds and investigation of flame stability of mixtures of H2/CO with air over a wide range of mixing ratios at high temperatures and pressures,“ 8th U.S. National Combustion Meeting Organized by the Western States Section of the Combustion Institute, Salt lake city, Utah, May 19-22, 2013.
  42. Askari, O. , Metghalchi, H., Moghaddas, A., Kazemzadeh Hannani, S. and Ebrahimi, R., “Fundamental study of spray and partially premixed combustion of methane/air mixture,” Internal Combustion Engine Division Fall Technical Conference, ICEF2012, ASME, Vancouver, BC, Canada, September 23-26, 2012.
  43. Askari, O. , Hannani, S.K., Rezaei, F., and Ebrahimi, R., “Spray characteristics and control of fuel injection of methane using the optical and polynomial curve fitting methods,” International Conference on Mechanical Engineering and Mechatronics, Ottawa, Ontario, Canada, August 16-18, 2012.
  44. Askari, O. , Hannani, S.K., and Ebrahimi, R., “The effect of division of the burned gas region for realistic in-cylinder no prediction – an experimental and thermodynamic study,” 23rd Canadian Congress of Applied Mechanics, Vancouver, BC, Canada, June 5-9, 2011.
  45. Askari, O. , and Saidi, M.H., “Asymptotic and exact analysis for constructal optimization of microchannel heat sink,” ASME Micro/Nanoscale Heat Transfer International Conference, Tainan, Taiwan, January 6-9, 2008.
  46. Askari, O. , and Saidi, M.H., “Three-dimensional analysis of fluid flow and heat transfer in the microchannel heat sink using additive-correction multigrid technique,” ASME Micro/Nanoscale Heat Transfer International Conference, Tainan, Taiwan, January 6-9, 2008.

Book Chapters

  1. Askari, O. , Saidi, M.H., and Hemmati, H., “Microchannel simulation”, in the book of "Heat Exchangers - Basics Design Applications" Edited by Jovan Mitrovic, InTech, ISBN 978-953-51-0278-6, DOI: 10.5772/1997, March 09, 2012.
  2. Porkhial, S., Askari, O. , and Shirzadi, M.R., “Transient analysis of a geothermal snow-melting system on a typical bridge”, in the book of "Numerical Modelling of Coupled Phenomena in Science and Engineering: Practical Use and Examples" edited by Mario César, ISBN 978-041-54-7628-7, CRC Taylor and Francis, December 1, 2008.