Assosiate Prof. Joseph Lefkowitz
Faculty:
Aerospace Engineering
Main energy field:
Combustion, Plasma Chemistry
About:
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:
Bio-fuel combustion:
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.
Plasma-assisted combustion:
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.
Selected Publications:
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.