方波形单脉冲射流调节对进气道再起动特性的影响  

Influence of single square pulse injection on restart characteristics for mixed-compression inlet

作　　者：游进[1] 夏智勋[1] 方传波[1] 胡建新[1] 刘冰[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073

出　　处：《航空动力学报》2011年第10期2181-2187,共7页Journal of Aerospace Power

基　　金：武器装备预研基金项目(9140A28030309KG01)

摘　　要：对方波形单脉冲射流作用下的混压式超声速进气道再起动过程进行了非定常数值仿真研究.结果表明,在外压缩楔面注入单个周期的方波形脉冲射流,在射流阻挡作用下,进入进气道的流量减小,脱体激波被吸入唇口,当射流流量大于某阈值后,进气道即能实现再起动.该阈值约为进气道流量的5%,再起动所需的射流作用时间小于15ms,所需的射流总质量小于0.001 4kg.研究还发现,当射流流量略小于阈值时,射流作用下的进气道流场为135Hz的高频振荡流场.当射流流量大于阈值时,射流流量越大,流场响应越快,再起动所需的脉冲射流作用时间也越短,射流总质量越小.The unsteady numerical study of the mixed-compression inlet restarting flow with the single square pulse injection was performed.The results show that mass flow entering the inlet decreased and external normal shock is swallowed into lip with the joining of the injection on ramp,because of the blockage of the jet to incoming flow.As the mass flow of jet exceeds the threshold value of 5% of inlet mass flow,and the duration time of injection is less than 15 ms,needing at least 0.001 4 kg gas for injection,the unstart flow of inlet will restart.And a high-frequency oscillation flow with 135 Hz arises when the mass flow of jet is less lightly than the threshold value.The duration time for restart and total gas mass reduce with the increase of mass flow of jet because of the faster flow response when the mass flow of jet exceeds the threshold value.

关 键 词：混压式超声速进气道 再起动特性 方波型单脉冲射流 非定常数值仿真 振荡流场 

分 类 号：V431[航空宇航科学与技术—航空宇航推进理论与工程]