为考察空气节流对超燃冲压发动机燃烧室的影响,非定常数值模拟和地面实验相结合证实了空气节流可以实现超燃燃烧室燃料稳定燃烧,研究了节流位置、节流流量、节流撤去时间对节流效果的影响。结果表明:在燃烧室入口马赫数2,静温548.8K ,静压101555.9Pa条件下,745mm处节流时,激波串稳定时间较短,稳焰失败；875mm处节流时,火焰稳定成功。随着节流流量和节流撤去时间的增加,燃烧越来越剧烈,壁面压力逐渐升高,可能影响进气道的起动,对于本文来流条件,30%入口空气流量作为节流流量是合适的,440ms以前撤去空气节流是恰当的。 

In order to investigate the effects of air throttling on scramjet combustor, air throttling numerical simulation and experimental measurements were performed.The parameters(position,flux,air throttling off time) of air throttling were analyzed. Results show that under the inflow air condition,Ma=2.0,T_e=548.8K,p_e=101.6kPa,the stabilization time of shock train is shorter with the location of air throttling at 745mm from the combustor entrance and flame stabilization is failed. But the flame is successfully stabilized with the location of air throttling at 875mm. When the flux of air throttling and air throttling off time increase, the wall pressure of scramjet combustor increases, which may influence the inlet starting. 30% flux of inflow air and air throttling off time under 440ms for air throttling are fit for this inflow air condition. 

国家自然科学基金(51376193)。