Main energy field:
Combustion, Plasma Chemistry
PhD – 2016 – Princeton University, Mechanical and Aerospace Eng.
MSc – 2011 – Princeton University, Mechanical and Aerospace Eng.
BSc – 2009 – Johns Hopkins University, Mechanical Eng.
Roles, Chairs, prizes:
Editorial Board, Combustion and Flame (2019 – 2024)
Ravitz Foundation Career Advancement Chair (2018)
National Research Council Research Associateship Program (2016 – 2017)
Research Area in Energy:
Our research focuses on efficient ignition and flame propagation of bio-fuels for use in internal combustion and aerospace engines, with specific emphasis on chemical kinetics and emissions reduction.
Research in this area focuses on technologies for enabling novel clean combustion concepts in internal combustion and aerospace engines, as well as leaner ignition capabilities.
J.K. Lefkowitz, T. Ombrello, “Reduction of Flame Development Time in Nanosecond Pulsed High Frequency Discharge Ignition of Flowing Mixtures,” Combust. Flame 193 (2018) 471-480.
L. Wermer, J.K. Lefkowitz, T. Ombrello, M.S. Bak, S. Im, “Spatiotemporal Evolution of the Plasma from Dual-pulsed Laser-induced Breakdown in an Atmospheric Air”, Plasma Sources Sci. Technol. 27 (2018) 015012.
J.K. Lefkowitz, T. Ombrello, “An Exploration of Inter-pulse Coupling in Nanosecond Pulsed High Frequency Discharge Ignition,” Combust. Flame 180 (2017) 136-147.
A. Rousso, S. Yang, J.K. Lefkowitz, W. Sun, Y. Ju, “Low Temperature Oxidation and Pyrolysis of n-Heptane in Nanosecond-pulsed Plasma Discharges,” Proc. Combust. Inst 36 (2017) 4105-4112.
S. Yang, J.K. Lefkowitz, S. Nagaraja, X. Gao, V. Yang, Y. Ju, W. Sun, “Numerical and Experimental Investigation of Nanosecond Pulsed Plasma Activated C2H4/O2/Ar Mixtures in a Flow Reactor,” J. Propul. Power 32 (2016) 1240-1252.
Y. Ju, J.K. Lefkowitz, C.B. Reuter, S.H. Won, X. Yang, S. Yang, W. Sun, Z. Jiang, Q. Chen, “Plasma Assisted Low Temperature Combustion,” Plasma Chemistry and Plasma Processing 36 (2016) 85-105.
J.K. Lefkowitz, P. Guo, A. Rousso, Y. Ju, “Species and Temperature Measurements of Methane Oxidation in a Nanosecond Repetitively Pulsed Discharge,” Phil. Trans. R. Soc. A 373 (2015) 20140333.
J.K. Lefkowitz, P. Gou, T. Ombrello, S.H. Won, C. Stevens, J. Hoke, F. Schauer, Y. Ju, “Schlieren Imaging and Pulsed Detonation Engine Testing of Ignition by a Nanosecond Repetitively Pulsed Discharge,” Combust. Flame 162 (2015) 2496-2507.
J.K. Lefkowitz, M. Uddi, B.C. Windom, G. Lou, Y. Ju, “In situ Species Diagnostics and Kinetic Study of Plasma Activated Ethylene Dissociation and Oxidation in a Low Temperature Flow Reactor,” Proc. Combust. Inst. 35 (2015) 3505-3512.
J.K. Lefkowitz, S.H. Won, Y. Fenard, Y. Ju, “Uncertainty Assessment of Species Measurements in Acetone Counterflow Diffusion Flames,” Proc. Combust. Inst. 34 (2013) 813-820.
J.K. Lefkowitz, J.S. Heyne, S.H. Won, S. Dooley, H.H. Kim, F.M. Haas, S. Jahangirian, F.L. Dryer, Y. Ju, “A Chemical Kinetic Study of tertiary-Butanol in a Flow Reactor and a Counterflow Diffusion Flame,” Combust. Flame 159 (2012) 968-978.