Experimental study on combustion characteristics of kerosene-fueled scramjet combustor
Experimental study on combustion characteristics of kerosene-fueled scramjet combustor
复制标题
DOI：
10.1080/00102202.2018.1472086
复制
发表时间：
2018-07
影响因子：
1.9
通讯作者：
Jianping Li;Guiqian Jiao;Deyong Shi;Wenya Song
中科院分区：
文献类型：
--
作者：
Jianping Li;Guiqian Jiao;Deyong Shi;Wenya Song
在总温为810K、马赫数为2.0、总压为600、700、800和900kPa的条件下，在超燃冲压发动机燃烧室中进行了煤油点火燃烧试验。燃烧室模型为双腔火焰稳定器双模燃烧室。在第一腔室中注入氢气，并且在第一腔室的前面注入煤油。氢气作为引燃火焰，首先被火花塞点燃，然后被煤油点燃。在停止注入氢气后，燃烧室一直在燃烧。在试验中拍摄了燃烧光度图像。试验结果表明，煤油和氢气在不同燃料条件下的燃烧模式均为上游空泡稳定模式。在较高的入口压力或煤油当量比下，煤油燃烧为上游空泡稳定模式。在低进口压力或低煤油当量比下，燃烧为下游空腔稳定燃烧模式。在中等入口压力或煤油当量比下，燃烧模式发生振荡。煤油燃烧室的火焰稳定能力随入口总压的增大而增大。
ABSTRACT Kerosene-fueled ignition combustion test was carried out in a scramjet combustor under the condition of total temperature of 810 K, Mach number of 2.0 and different total pressures of 600, 700, 800 and 900 kPa. The combustor model was a dual-mode combustor with double cavity flameholder. Hydrogen was injected in the first cavity, and kerosene was injected in front of the first cavity. Hydrogen, being pilot flame, was the first to be ignited by the spark plug, and then kerosene was ignited by hydrogen. Kerosene was kept burning solely after hydrogen was stopped injecting. Combustion luminosity images were pictured in tests. The test results showed that all the combustion modes of kerosene and hydrogen were upstream cavity stabilization mode under different fueling conditions. Under the higher entrance pressure or the higher kerosene equivalence ratios, the kerosene combustions were upstream cavity stabilization mode. Under the lower entrance pressure or the lower kerosene equivalence ratios, the combustions were downstream cavity stabilization combustion mode. Under the middle entrance pressure or the kerosene equivalence ratios, oscillations of combustion mode occurred. The flameholding capacity of the kerosene-fueled combustor increases with the increase of the entrance total pressure.