三维坑湍流分离流动的粘流/无粘流干扰计算

Viscous-Inviscid Interaction Coupled Calculation of Three- Dimensional Turbulent Separated Flow over Dents

本文对坑的三维分离流动做了低速粘流与无粘流的相互作用计算。对三维边界层反方法进行了分析和讨论。用数值试验的方法验证了在H和α作为已知量的情况下,三维边界层反方法的积分方程是双曲型的,并提出了一种近似数值特征线法进行求解。无粘流采用低速位流面元法。计算表明所用方法可计算出三维效应很强(即横向变化很大)的三维边界层分离流动。

The coupled calculation for the viscous-inviscid interaction of three dimensional separated flow over dents at low speed has been made in the present paper. The analysis and discussion have been made to the inverse boundary layer, method.It has been verified by the numerical experiments that the integral equation of the inverse boundary layer method is hyperbolic when H and a were given. An approxi= mated numerical characteristic method has been proposed. The outer inviscid flow is solved with potential panel method. The computational results have shown that the three dimensional boundary layer separated flow with strong three dimensional effect can be obtained with, the present method.