如何预计有分离的流动,一直是流体力学中一个重要问题。N-S方程固然可以描写分离流,但在目前计算技术条件下求解该方程要耗费大量机时。通常求解附面层方程的方法常因在分离点附近出现奇点而失败。近年来发展了解附面层方程的反方法,即给定附面层位移厚度δ~*或阻力系数c_f,求附面层外边界速度u_e和其他参数。位移厚度和阻力系数均为未知量,故用反方法计算时必须先估计位移厚度或阻力系数,将算得的u_e值和 How to predict the separation of flow has always been an important issue in fluid mechanics. Although the N-S equation can describe the separation flow, it takes a lot of time to solve the equation under current computational techniques. Often the solution to the equation of the overburden often fails due to singularities around the point of separation. In recent years, we develop an inverse method to understand the boundary layer equation, that is, given the thickness δ ~ * or the drag coefficient c_f of the surface layer, find the outer boundary velocity u_e and other parameters. Displacement thickness and resistance coefficient are unknowns, so the inverse method of calculation must first estimate the displacement thickness or resistance coefficient, the calculated u_e value and