Flame quenching process in cavity based on model scramjet combustor |
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Authors: | Yu Pan Jing Lei Jian-Han Liang Wei-Dong Liu Zhen-Guo Wang |
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Institution: | 1. Department of Aerospace and Material, National University of Defense Technology, 410073, Changsha, China
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Abstract: | The flame quenching process in combustors was observed by high speed camera and Schlieren system, at the inflow conditions
of Ma = 2.64, T
0 = 1 483 K, P
0 = 1.65MPa, T = 724K and P = 76.3 kPa. Changing process of the flame and shock structure in the combustor was clearly observed. The results revealed
that the precombustion shock disappeared accompanied with the process in which the flame was blown out and withdrawed from
the mainflow into the cavity and vanished after a short while. The time of quenching process was extended by the cavity flame
holder, and the ability of flame holding was enhanced by arranging more cavities in the downstream as well. The flame was
blown from the upstream to the downstream, so the flame in the downstream of the cavity was quenched out later than that in
the upstream. |
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Keywords: | Flame quenching process · Cavity · Model scramjet combustor |
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