锯齿型通道湍流流动和换热的自维持振荡  

THE SELF-SUSTAINED OSCILLATORY OF THE TURBULENT FLOW AND HEAT TRANSFER IN A CORRUGATED CHANNEL

作　　者：卢玫[1] 孙大康[1] 李凌[1] 杨茉[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《工程热物理学报》2010年第12期2069-2072,共4页Journal of Engineering Thermophysics

基　　金：上海科委科技创新行动计划(No.08DZ1204300);上海市重点学科建设资助项目(No.J50501)

摘　　要：采用RNG k-ε湍流模型对锯齿形通道内流动和换热进行了数值模拟。对以时均方程法模拟得到的流场、温度场以及U-V相图、Nu-θ相图进行了分析。研究表明,在本文计算的Re范围内,数值计算结果仍能反映出周期性通道内流动和换热的自维持振荡特性,无量纲速度U,通道平均Nu数随时间作周期性振荡,并且振荡幅度、频率随Re数的增大而增大。Unsteady RNG κ-ε turbulent model is used during the numerical simulation of the flow and heat transfer in the corrugated channel. The flow and temperature distribution, U - V phase and Nu - θ phase are discussed in this paper. It is indicated from the result that there is still a self-sustained character of the flow and heat transfer in the range of Reynolds numbers simulated in this paper. Non-dimensional parameters such as U and Nu vary periodically with time under certain frequency and amplitude. And both the frequency and the amplitude of the oscillation will increase as the Reynolds number is increased.

关 键 词：锯齿型通道 数值模拟 湍流 自维持振荡 

分 类 号：TK123[动力工程及工程热物理—工程热物理]