抽吸位置对高超声速进气道起动性能的影响

Impact of suction position on starting of hypersonic inlet

对某典型二元高超声速进气道流场进行了二维数值模拟,研究了抽吸位置及抽吸流量对进气道性能的影响.结果表明:抽吸可以有效地改善进气道起动性能,但不同的抽吸位置改善效果不同.在内压段抽吸时,抽吸流量越大进气道的起动性能改善越明显;外压段抽吸可以有限地改善进气道的起动性能.抽吸孔布置在喉道前压力随马赫数变化较大的区域时,能够实现抽吸流量随来流马赫数的变化自动调节,更好地改善起动性能.对气动性能影响方面,外压段抽吸可以提高进气道的压缩效率,内压段和隔离段抽吸均使压缩效率变小.

To research the ways of relieving inlet unstart phenomenon,the flow of a typical hypersonic 2-D inlet with different suction positions was analyzed in this paper.The result shows that,the inlet with suction can start easily,but the position of suction decides the impact.In the presence of suction in internal passage,the starting ability improves obviously with the growing suction flow,and the phenomenon is more obvious.The start ability improves finitely in the presence of suction in external pressure surfa...