关键词: 超声速燃烧室;煤油;支杆;燃烧性能

Abstract: In order to study the effect of kerosene distribution uniformity on combustion performance, experiments were carried out by changing the number of injector holes, the direction of injection (one-row and two-row on a strut) and the distribution of kerosene injector holes (3 holes or 4 holes in one-row) in one strut, with the free stream Mach 6 and total temperature 1650K. Some conclusions can be drawn from the analysis of the experimental data in different conditions such as the integrated balance data and the wall pressure distributions:compared to the other two struts, the top holes of the 1×4 strut are nearer to the wall and its bottom holes are closer to the cavity, so the kerosene enters the low-speed and high-temperature zones such as the boundary layer and the circumfluence zone of the cavity more easily, which is helpful for the ignition and steady combustion of the kerosene; for the opposite injection scheme, most kerosene and its combustion are in the core area of the combustor, so the wall heat load is reduced, but too rich fuel has bad influence on the total combustion performance; for the both-side injection scheme, some kerosene is injected into the corner of the combustor wall, which results in more well-proportioned distribution in the cross section of the combustor, so ignition becomes much easier, and better combustion effect and greater net thrust are obtained. 

Key words: Supersonic combustor; Kerosene; Struts; Combustion performance