Combustion characteristic using O2-pilot strut in a liquid-kerosene-fueled strut-based dual-mode scramjet
Combustion characteristic using O2-pilot strut in a liquid-kerosene-fueled strut-based dual-mode scramjet
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DOI：
10.1177/0954410012464455
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
W. Bao;Jichao Hu;Youhai Zong;Qingchun Yang;Meng Wu;Jun-tao Chang;Daren Yu
中科院分区：
文献类型：
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作者：
W. Bao;Jichao Hu;Youhai Zong;Qingchun Yang;Meng Wu;Jun-tao Chang;Daren Yu
在液体煤油双模超燃冲压发动机燃烧室中进行了一系列探索性实验，测试了一种新设计的喷油和火焰保持支柱。支柱厚度为8 mm，前部堵塞约8%。为了在无任何空腔和其他火焰稳定器的闪光壁燃烧室中利用室温液体煤油在该薄支柱下组织马赫数等于2.6的空气流动的稳定燃烧，通过支柱后部的一组孔口注入一定量的氧气，在支柱后部产生稳定的中心局部火焰，并围绕该局部火焰组织主流燃烧。实验结果表明，采用该中心火焰支撑策略可以在燃烧室中心实现稳定燃烧，当量比可在0.19~1的较大范围内实现。通过对燃烧室压力分布的分析，得出了不同当量比下的燃烧室模式。文中还讨论了不同当量比下氧气对燃烧过程的不同影响。
A set of exploratory experiments are conducted to test a newly designed strut for fuel injection and flame holding in a liquid-kerosene-fueled dual-mode scramjet combustor. The thickness of the strut is 8 mm and the front blockage is about 8%. To organize stable combustion in a Mach number equal to 2.6 air flow under this thin strut using room-temperature liquid kerosene in a flash wall combustor without any cavity and other flame holders, some oxygen is injected through a set of orifices at the back of the strut, based on which a stable center local flame is generated at the back of the strut and the main flow combustion can be organized around this local flame. Experimental results show that stable combustion can be achieved at the center of the combustor with a wide range of equivalence ratio from 0.19 to 1 based on this center flame strut strategy. Through the analysis of the pressure distribution along the combustor, different combustor modes appear with different equivalence ratio. The article also gives some discussions about different influence of the oxygen to the combustion process under different equivalence ratio.