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边界层方程消去奇性机理的分析与分离流的计算

On Mechanism of the Singularity Elimination Methods forBoundary Layer Equations and Calculation of Separation Flows

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【作者】 包涵龄武玉英毋立芳

【Author】 Bao Hanling Wu Yuying Wu Lifang(Beijing Polytechnic University, Beijing 100021)

【机构】 北京工业大学

【摘要】 本文对各种边界层反方法何以能消去Goldstein奇性的机理进行了详细分析,指出了它们都是为消去x(uy)0在分离点的不确定性和为其定值提供某种内在机制。文中还导出了三维粘性-无粘干扰模型的表达式。并将它同全三维边界层方程耦合求解,在一个后掠机翼上解出了攻角等于20°的大范围后部分离流场。

【Abstract】 In this paper,the Goldstein singularity elimination mechanism of the various inverse methods is analysed in detail.It is shown that the nature of the singularity elimination is to provide with some inherent mechanism to determine the value of x(uy)0 at the point of flow separation,which is an uncertein value without the mechanism.A formulation of the 3d viscousinviscid interaction law is introduced also in the paper.The law and the full 3d boundary layer equations are solved in coupled mode.The boundary layer flow filed with fairly extensive separated rear region has been calculated for a swept wing under angle of attack equal to 20°.

【基金】 国家自然科学基金,国防科工委基金
  • 【文献出处】 空气动力学学报 ,ACTA AERODYNAMICA SINICA , 编辑部邮箱 ,1998年02期
  • 【分类号】O357.4,V211.1
  • 【被引频次】3
  • 【下载频次】48
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