Air Force scientist delivers fuels seminar to Army researchers

July 15, 2016

By David McNally, ARL Public Affairs

Story Highlights

  • The Vehicle Technology Directorate of the U.S. Army Research Laboratory seeks technology solutions for mobilizing tomorrow's Soldiers.

ABERDEEN PROVING GROUND, Md. (July 13, 2016) -- Army researchers gathered for an in-depth look at optimizing the inner workings of combustion engines during a seminar by visiting Air Force scientist Dr. Joseph Lefkowitz July 13, 2016, at the Vehicle Research Laboratory.

Lefkowitz's work with the U.S. Air Force Research Laboratory explores the plasma/combustion interaction from a chemical, kinetic perspective using both high-density localized discharges and low-density diffuse discharges.

The Vehicle Technology Directorate of the U.S. Army Research Laboratory seeks technology solutions for mobilizing tomorrow's Soldiers. The researchers support the lab's Sciences for Maneuver Campaign.

"It is found that high-energy electrons initiate chain propagating or branching reactions, which can maintain oxidation at temperatures far below the auto-ignition threshold," Lefkowitz said. "In high-frequency pulsing, these kinetic effects result in a positive feedback loop in which radical species are produced by both the plasma and combustion reaction processes in series, leading to the observed ignition enhancement."

Lefkowitz is a National Research Council Research Associate in the Hypseronic Sciences Branch at the Air Force Research Laboratory. He received his doctorate in mechanical and aerospace engineering from Princeton University in January, 2016. His research interests include plasma-assisted combustion, ignition dynamics, chemical kinetics in plasmas and flames, and optical techniques in reacting flows. His doctoral dissertation explored the kinetics of hydrocarbon oxidation exposed to repetitively pulsed nanosecond-duration discharges. His current work at the AFRL explores ignition in high-speed flows and in highly turbulent environments relevant to scramjet combustors.


The U.S. Army Research Laboratory is part of the U.S. Army Research, Development and Engineering Command, which has the mission to ensure decisive overmatch for unified land operations to empower the Army, the joint warfighter and our nation. RDECOM is a major subordinate command of the U.S. Army Materiel Command.

 

Last Update / Reviewed: July 15, 2016