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Aerodynamics of Two Side-by-Side Plates in Hypersonic Rarefied-Gas Flows

机译:高超声速稀薄气流中两个并排板的空气动力学

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摘要

Hypersonic rarefied-gas flows near two side-by-side plates have been studied numerically with the direct simulation Monte Carlo technique under transitional rarefied-gas-flow conditions (Knudsen numbers from 0.024 to 1.8). Strong influences of the geometrical factor (ratio of distance between plates to plate length) and the Knudsen number on the flow structure (the shape of shock waves, the configuration of subsonic flow zones), skin friction, pressure distribution, lift, and drag have been found. For small geometrical factors, the repulsive lift force becomes significant with a lift-drag ratio of 1.7 for near-continuum flow, but decreases significantly (0.4) in the near-free-molecular flow. Results show that the lift, drag, and lift-drag ratio dependency on the Knudsen number is nonmonotonic for various geometrical factors.
机译:通过直接模拟蒙特卡罗技术在过渡稀薄气体流动条件下(Knudsen数从0.024到1.8),对两个并排板附近的高超音速稀薄气体流动进行了数值研究。几何因素(板之间的距离与板长度之比)和克努森数对流动结构(冲击波的形状,亚音速流动区域的形状),蒙皮摩擦,压力分布,升力和阻力具有很大的影响被发现。对于较小的几何因子,排斥力在近连续流下的提升阻力比为1.7,但在近自由流下却显着减小(0.4)。结果表明,对于各种几何因素,升力,阻力和升阻比对Knudsen数的依赖性都是非单调的。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2002年第6期|p.910-916|共7页
  • 作者

    Vladimir V. Riabov;

  • 作者单位

    Rivier College, Nashua, New Hampshire 03060;

  • 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
  • 中图分类 航空;
  • 关键词

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