圆管边界层动能积分方程及其应用

The Energy Integral Equation for the Boundary Layer in a Round Pipe and Its Application

根据动能守恒原理建立了圆管边界层的动能积分方程,在边界层内流速分布具有相似性的假设下,选用二次抛物线速度剖面,对圆管进口段边界层进行了计算,结果说明计算值与精确解一致。

Based on the energy conservation law,the energy integral equation for the boundary layer in a round pipe is suggested in this paper.Assuming that the velocity distribution in the boundary layer possesses similarity and using the velocity profile with quadratic parabola,the laminar boundary layer development in a round pipe is computed.The computed result is found to be in agreement with the exact solution.