平面不可压后台阶湍流流动的数值模拟——壁面温度的影响  

Numerical Simulation of 2-D Incompressible Turbulent Flow over a Backward-Facing Step—Effects of Wall Temperature

作　　者：孙正中[1] 苏莫明[1] 周铮[2] 

机构地区：[1]西北工业大学,陕西西安710072 [2]中国燃气涡轮研究院,四川成都610500

出　　处：《航空计算技术》2009年第4期71-74,共4页Aeronautical Computing Technique

摘　　要：对平面不可压后台阶湍流流动进行了数值模拟,研究了台阶后下壁面温度对流场的影响。数值模拟采用SIMPLE算法,湍流采用k-ω湍流模型模拟。研究结果表明台阶后通道温度剖面分为大梯度区、过渡区和稳定区,对于温度剖面的过渡区在后台阶流动的回流区具有凸的特性,而在恢复区具有凹的特性。另外,数值解表明湍流模型在模拟具有分离再附着流动特性的后台阶湍流流动时具有很高的精度。Numerical simulation research of plane incompressible turbulent flow over a backward- facing step （BFS） is conducted, mainly on the effects of stepped wall temperature. The simulation is based on SIMPLE algorithm, k - ω model is employed to simulate turbulence. Result shows temperature profiles behind the step consist of three parts ：large gradient part, transitional part and steady part, and the transitional part of the temperature profile exhibits convex character in the recirculation zone of the BFS flow and concave character in the reattaching zone. Furthermore,k -ω model shows high accuracy in the simulation of BFS flow with separation and reattachment.

关 键 词：后台阶流 湍流 k-ω模型 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]