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An expression for the dynamic stability of blunt slender elliptic bodies in hypersonic flow

机译:高超声速流动中钝长椭圆形物体动力稳定性的表达式

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摘要

Dynamic stability data on axially symmetric pointed and blunt cones, parabolic profiles and other ogive and blunt cylindrical shapes is readily available in literature; the dynamic stability on elliptic blunt paraboloids has not been studied at any great lengths in the past. Both numerical and experimental results are scarce. The present paper uses the shock expansion method to obtain the unsteady pressure distribution on blunt elliptic conical bodies at small angles-of-attack. The resulting unsteady pressure distribution is suitably integrated over the surface of the elliptic body to obtain appropriate analytic expressions for static and dynamic stability. Owing to scarcity of meaningful numerical or measured data for elliptic bodies, the results are compared in qualitative terms against published dynamic stability data on pointed elliptical cones or other axisymmetric blunt cones.
机译:有关轴向对称的尖头和钝锥,抛物线轮廓以及其他钝齿和钝圆柱形状的动态稳定性数据可从文献中轻松获得;过去对椭圆钝形抛物面的动态稳定性没有进行任何长时间的研究。数值和实验结果均很少。本文采用冲击扩展法,以较小的攻角获得钝的椭圆形圆锥体上的非稳态压力分布。将所得的非稳态压力分布适当地积分在椭圆形体的表面上,以获得用于静态和动态稳定性的适当解析表达式。由于缺乏椭圆体的有意义的数值或测量数据,因此将结果与定点椭圆形圆锥或其他轴对称钝圆锥上已发布的动态稳定性数据进行了定性比较。

著录项

  • 来源
    《The Aeronautical Journal》 |2014年第1207期|1079-1089|共11页
  • 作者

    M. Khalid; K. A. Juhany;

  • 作者单位

    King Abdul Aziz University Jeddah Saudi Arabia;

    King Abdul Aziz University Jeddah Saudi Arabia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
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