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Proceedings Paper

Perspective of laser-induced plasma ignition of hydrocarbon fuel in Scramjet engine
Author(s): Leichao Yang; Xiaohui Li; Jianhan Liang; Xin Yu; Xipeng Li
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Paper Abstract

Laser-induced plasma ignition of an ethylene fuelled cavity was successfully conducted in a model scramjet engine combustor. The ethylene was injected 10mm upstream of cavity flameholder from 3 orifices 60 degree inclined relative to freestream direction. The 1064nm laser beam, from a Q-switched Nd:YAG laser source running at 3Hz and 200mJ per pulse, was focused into cavity for ignition. High speed photography was used to capture the transient ignition process. The laser-induced gas breakdown, flame kernel generation and propagation were all recorded and ensuing stable supersonic combustion was established in cavity. The flame kernel is found rotating anti-clockwise and gradually moves upwards as the entrainment of circulation flow in cavity. The flame is then stretched from leading edge to trailing edge to fully fill the entire cavity. Eventually, a stable combustion is achieved roughly 900μs after the laser pulse. The results show promising potentials for practical application. The perspective of laser-induced plasma ignition of hydrocarbon fuel in scramjet engine is outlined.

Paper Details

Date Published: 26 January 2016
PDF: 7 pages
Proc. SPIE 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015, 97962I (26 January 2016); doi: 10.1117/12.2230904
Show Author Affiliations
Leichao Yang, National Univ. of Defense Technology (China)
Xiaohui Li, Harbin Institute of Technology (China)
Jianhan Liang, National Univ. of Defense Technology (China)
Xin Yu, Harbin Institute of Technology (China)
Xipeng Li, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9796:
Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015
Weimin Bao; Yueguang Lv, Editor(s)

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