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首页> 外文期刊>AIAA Journal >Unsteady Behaviors of a Hypersonic Inlet Caused by Throttling in Shock Tunnel
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Unsteady Behaviors of a Hypersonic Inlet Caused by Throttling in Shock Tunnel

机译：冲击隧道中节流引起的超音速进气道的非稳态行为

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摘要

A two-dimensional hypersonic inlet/isolator model that exhibits self-starting characteristics is tested with different exit throttling ratios at a freestream Mach number of 5.9 in a shock tunnel. Various flow characteristics are observed and measured by applying simultaneous high-speed Schlieren imaging and surface pressure measurements. The results indicate that the backpressure generated by the throttling device can be tolerated, and the inlet can maintain the starting mode at low throttling ratios, whereas unstart flows are initiated from the near-choke throttling ratios, and a shock wave oscillation appears. The Schlieren movie demonstrates that the upstream-propagating shocks in the duct play important roles during the oscillation cycles and that the formations of the upstream-propagating shocks are related to the downstream-propagating compression waves/shock waves that encounter the throttling section. The frequency of the shock wave oscillation increases with increasing exit throttling ratios, primarily because of the acceleration of the upstream propagation.
机译：在冲击隧道中，自由流马赫数为5.9时，以不同的出口节流比测试了具有自启动特性的二维高超声速进气/隔振器模型。通过同时进行高速Schlieren成像和表面压力测量，可以观察和测量各种流动特性。结果表明，节流装置产生的背压是可以忍受的，并且进气口可以在低节流比下维持启动模式，而从近节流节流比开始产生不启动流，并出现冲击波振荡。 Schlieren的电影表明，管道中的上游传播的冲击在振荡周期中起着重要的作用，并且上游传播的冲击的形成与遇到节流段的下游传播的压缩波/激波有关。冲击波振荡的频率随着出口节流比的增加而增加，这主要是由于上游传播的加速。

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  • 来源
    《AIAA Journal》 |2013年第10期|2485-2492|共8页
  • 作者

    Zhufei Li; Wenzhi Gao; Hongliang Jiang; Jiming Yang;

  • 作者单位

    University of Science and Technology of China, 230027 Hefei, People's Republic of China,Modern Mechanics Department;

    University of Science and Technology of China, 230027 Hefei, People's Republic of China,Modern Mechanics Department;

    University of Science and Technology of China, 230027 Hefei, People's Republic of China,Modern Mechanics Department;

    University of Science and Technology of China, 230027 Hefei, People's Republic of China,Modern Mechanics Department;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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