平板边界层扰动演化特征的研究

摘要

基于空间模式计算不可压缩边界层，基本流选用平板层流Blasius解，采用高精度的紧致有限差分格式数值模拟三维边界层扰动方程。并应用具体的算例，研究了入口不同扰动幅值对转捩位置的影响，以及不同小幅值下扰动的演化特征。%In this paper,the three dimensional boundary layer disturbance equations will be nu-merically simulated by high precision compact finite difference,based on the calculation of incom-pressible boundary layers with the spatial model and the Blasius solution.The basic flow is the laminar Blasius similarity solution.With the help of concrete examples,the author studies the effect of different disturbance amplitudes of the entrance on transition location,and evolution of small-amplitude disturbance.