二维充分发展紊流场中不同紊流模型的数值分析

NUMERICAL ANALYSIS OF DIFFERENT TURBULENCE M0DELS IN A TWO-DIMENSIONAL FULLY DEVELOPED TURBUIENT FLOW

本文建立了一种以矩形通道内二维充分发展紊流流场为“已知”流场考核紊流模型的数值分析方法,并编制了适合在上述流场中考核不同紊流模型的通用计算机程序(FORTRAN 77)。使用本文方法对5个典型紊流模型的数值分析和比较表明:本文方法和计算机程序是可靠的,可用于考核不同紊流模型的数值预示结果。在上述流场中,K-ε模型精度最高。采用间竭因子的旋涡粘性系数模型简单,并能保证工程计算所需的精度。

A numerical analysis method with computer program(FORTRAN 77)is presented in this paper for checking turbulence models in a two-dimensional fully developed turbulent channel. The method and computer program are verified by using them to check five typical turbulence models.In that flow field,the K-ε model has the highest accuracy and the eddy viscosity model corrected by intermittency factor has a simple form but with enough accuracy for engineering purpose.