Ignition Characteristics of a Liquid-Kerosene-Fueled Scramjet during Air Throttling Combined with a Gas Generator
Ignition Characteristics of a Liquid-Kerosene-Fueled Scramjet during Air Throttling Combined with a Gas Generator
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DOI：
10.1061/(asce)as.1943-5525.0000329
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发表时间：
2014-09
影响因子：
2.4
通讯作者：
W. Bao;Jichao Hu;Youhai Zong;Qingchun Yang;Jun-tao Chang;Meng Wu;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;Jun-tao Chang;Meng Wu;Daren Yu
在直连式地面试验台上，对一种平壁式液体煤油燃料超燃冲压发动机燃烧室的点火特性进行了试验研究。喷管出口处的污染气流的总温度和马赫数分别为1,505 K和3.0。点火过程由空气节流和微型热气发生器（MHGG）完成。没有任何空腔或后退台阶，火焰稳定也是由MHGG完成的。通过控制空气节流压力和空气节流与MHGG的重叠时间，可以获得不同的点火效果。本文将这些不同的结果划分为四种点火模式，并对每种模式的特点进行了详细的描述。另外，本文还对实验数据进行了总结，证明了点火规律与油气当量比有一定的关系。
AbstractThe ignition characteristics of a flush wall, liquid-kerosene-fueled scramjet combustor are tested in a directly connected ground test rig. The total temperature and Mach number of the vitiated airflow at the exit of the nozzle are 1,505 K and 3.0, respectively. The ignition process is accomplished by air throttling and a micro hot gas generator (MHGG). Without any cavity or backward steps, the flame holding is also accomplished by the MHGG. By controlling the air-throttling pressure and overlap time of the air throttling and the MHGG, different ignition results can be achieved. This paper divides these different results into four ignition modes and provides a detailed description of the characteristics of each mode. In addition, this paper summarizes the experiment data and proves that the ignition laws have some relationship to the fuel–air equivalence ratio.