实时泄流控制对内转进气道起动性能影响试验研究
Real-time Bleeding Control Influence on the Starting Characteristics of an Inward-turning Inlet
杨大伟 1李一鸣 2张胜 2曲俐鹏 1余安远 1贺佳佳 2陈锐杰2
作者信息
- 1. 中国空气动力研究与发展中心 高超声速冲压发动机技术重点实验室,四川 绵阳 621000;中国空气动力研究与发展中心 空天技术研究所,四川 绵阳 621000
- 2. 中国空气动力研究与发展中心 空天技术研究所,四川 绵阳 621000
- 折叠
摘要
本文采用高速阴影录像和沿程脉动压力测量技术,在常规冷流风洞试验中获得了某内转进气道马赫数Ma 5、迎角0°状态下的起动特性,并进行了实时泄流控制研究.试验结果显示,无泄流的进气道在节流度0.6下处于激波振荡状态,基准频率约为60Hz;节流撤销后,进气道未恢复起动,进气道此时不能自起动;泄流打开后,进气道起动,表明增加泄流控制的进气道具备自起动能力;泄流再关闭后,进气道依然保持起动状态,证明无泄流的进气道当前工况处于起动双解区内.研究表明,内转进气道无控制时的自起动问题比较严重,合理的泄流控制能够有效提高进气道的自起动能力,实时泄流控制可成为恢复进气道起动的一条有效途径.
Abstract
The starting characteristics of an inward-turning inlet at Mach number 5 and angle of attack 0° were obtained in a routine cold flow blow-down wind tunnel by using high-speed shadow video recording and fluctuating pressure measurement technology,and the control of starting characteristics was carried out.The results show that the inlet without bleeding is in shock oscillation state at a throttle degree of 0.6,with an oscillation frequency of about 60Hz,indicating that the inlet has been being in unstart state.After the throttle is cancelled,the inlet does not restart,indicating that the inlet cannot self-start without controlling.After the bleeding is opened,the inlet starts,indicating that the inlet is a self-start inlet with bleeding.When the bleeding is closed again,the inlet remains starting state,indicating that the inlet without bleeding is in the starting double solution zone.The research shows that the self-starting problem of the inward-turning inlet without control is serious,that reasonable bleeding can effectively improve the inlet self-starting ability,and that the real-time opening and closing of bleeding can be an effective way to restart an inward-turning inlet in real time.
关键词
内转进气道/风洞试验/起动特性/实时泄流控制Key words
Iinward-turning inlet/wind tunnel test/starting characteristics/bleeding control in real time引用本文复制引用
出版年
2024
NETL
NSTL
万方数据