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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 forBoundary Layer Equations and Calculation of Separation Flows
【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(uy)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(uy)0 at the point of flow separation,which is an uncertein value without the mechanism.A formulation of the 3d viscousinviscid interaction law is introduced also in the paper.The law and the full 3d 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°.
【Key words】 boundary layer calculation; separation flow; Goldstein singularity; viscousinviscid interaction; inverse method;
- 【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