Plasma-assisted ignition for a kerosene fueled scramjet at Mach 1.8

Authors:  Fei Li, Xi-long Yu, Ying-gang Tong, Yan Shen, Jian Chen, Li-hong Chen, Xin-yu Chang

Abstract:
By using a plasma jet (PJ) torch with 1.5 kW input power as an igniter, successful ignition for liquidkerosene fueled combustion experiment was conducted in a direct-connected supersonic test facility. The incoming flow has total temperature of 950 K and local Mach number of 1.8, corresponding to Mach 4 flight condition. In this study, several optical techniques, including high speed photography, high speed schlieren photography, and planar laser scattering (PLS) technique, were combined to study the ignition process, flame propagation, and mixing features of liquid kerosene fuel with air around the cavity. The effect of fuel injection position, injection pressure, and feedstock gas on ignition performance has been analyzed. The results indicate that local mixing is a critical factor for ignition. It is also shown that the PJ torch with N2 + H2 feedstock is superior to the PJ torch with N2 feedstock for the ignition of liquidkerosene fuel. These results are valuable for the future optimization of kerosene-fueled scramjet engine when using a PJ torch as an igniter.

Keywords:
Scramjet
Kerosene fuel
Plasma torch
Ignition

Published in: Aerospace Science and Technology  (Volumes 28, Issue 1, July 2013)

Publisher: Elsevier

ISSN Information: 1270-9638

Plasma-assisted ignition for a kerosene fueled scramjet at Mach 1.8

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