Experimental Research on Hydrogen and Hydrocarbon Fuel Ignition for Scramjet at Ma=4
Experimental Research on Hydrogen and Hydrocarbon Fuel Ignition for Scramjet at Ma=4
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DOI：
10.5539/mas.v7n3p56
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发表时间：
2013-02
影响因子：
3.5
通讯作者：
Zhang Wan-zhou;L. Jialing;Yang Shun-hua;C. Wenming;Deng Weixing;Zhou Huabo
中科院分区：
文献类型：
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作者：
Zhang Wan-zhou;L. Jialing;Yang Shun-hua;C. Wenming;Deng Weixing;Zhou Huabo
在直联式脉冲燃烧装置上进行了氢气和乙烯的着火实验。空气滞止温度为900K，滞止压力为0.8 Mpa，进口马赫数约为2.0。实验结果表明：(1)在该燃烧室模型中，当氢气沿空腔上游喷射时，在935K时不会发生氢气自燃。但使用低输入功率的点火器，可以可靠地点燃氢气。(2)即使在高点火器功率下，也不能用点火器才能点燃乙烯。在点火器和引氢的辅助下，在点火器和引氢完全关闭后，乙烯可以可靠地点燃并保持稳定燃烧。(3)引氢点火成功的最低当量比低于点火失败的当量比为0.05。(4)当导氢和点火器同时点火时，点火器的作用是点燃氢气，点火器的输入功率对点火性能没有影响。
Ignition experiments of Hydrogen and Ethylene were performed on direct-connected pulse combustion facility. Air stagnation temperatures were 900 K and stagnation pressures were 0.8 MPa, the entrance Mach number was approximate 2.0 provided by a two-dimension nozzle. The experimental results indicate that: (1) Hydrogen self-ignition won’t occur at stagnation 935 K when it is injected upstream the cavity in this combustor model. But with low input power igniter, hydrogen can be ignited reliably. (2) Ethylene cannot be ignited with igniter only even at high igniter power. Under the assistant of both igniter and pilot Hydrogen, Ethylene can be ignited reliably and maintain stable combustion after the igniter and pilot hydrogen completely turned off. (3) The lowest equivalence ratio of pilot hydrogen for successful ethylene ignition is 0.05 below that ignition will fail. (4) When pilot hydrogen and igniters were both employed for ignition, the function of igniter is to ignite the hydrogen and the input power of igniter has no influence on ignition performance.