中国空间科学技术

中国空间科学技术

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再入飞行体远场二维湍流尾迹的工程计算方法

刘青云,张平   

  1. 北京理工大学
  • 发布日期:1997-06-25

AN ENGINEERING METHOD FOR TWO DIMENSIONAL TURBULENT TRAIL OF HYPERSONIC REENTRY BODIES

Liu Qingyun Zhang Ping (Beijing Institute of Technology,Beijing 100081)   

  • Online:1997-06-25

被引次数

2

摘要： 建立了再入体再入大气层形成的尾迹的工程模型，并运用边界层理论求解二维等压湍流尾迹流动。根据Ｐｒａｎｄｔｌ的湍流切应力的混合长度理论和Ｔａｙ－ｌｏｒ的涡量交换理论分别获得速度分布和温度分布，根据Ｌｙｋｏｕｄｉｓ的远场尾迹理论计算了轴心参数分布，并且获得了尾迹长度、自由电子数密度等尾迹参数。计算结果与同类文献一致。文章的目的是为计算尾迹的雷达散射截面提供初始参数。

关键词: 湍流尾流, 分布参数, 再入飞行器

Abstract: An engineering model for hypersonic reentry body trail is established in this paper,and a calculation is performed by using boundary layer theory.Prandtl's mixture length theory of turbulent shearing stress and Taylor's eddy exchange theory are used to predict the distribution of velocity and temperature respectively.Lykoudis's method is used to calculate the parameters at the axis of the trail.Also the trail length and free electron number density of the trail are predicted.The results are in agreement with those of the relative references.The purpose of this paper is to give those parameters required for the computation of the radar diffusion section of the trail.