锯齿形通道内流动与换热的数值分析  

NUMERICAL ANALYSIS OF THE FLOW AND HEAT TRANSFER IN A SAW-TOOTH CHANNEL

作　　者：卢玫[1] 马奇[1] 李娟[1] 杨茉[1] 余敏[1] 徐之平[1] 

机构地区：[1]上海理工大学动力工程学院,上海200093

出　　处：《工程热物理学报》2004年第4期670-672,共3页Journal of Engineering Thermophysics

基　　金：上海市教委发展基金资助项目(No.03GK08);上海市重点学科建设项目资助

摘　　要：本文采用非稳态数学模型对锯齿形通道的周期性充分发展流动与换热进行了数值模拟。计算结果显示,在所考虑的参数条件下,Re≥100时温度场和流场随时间不断变化,同时Nu数也随时间发生周期性振荡,并且随着Re的增大这种变化越明显;Re≥250时通道内开始产生旋涡,换热不断增强。计算得到的平均Nusselt数与现有文献中相近问题的试验关联式基本吻合。A numerical simulation is performed by adopting a unsteady mathematical model for the periodically fully developed fluid flow and convection heat transfer in a saw-tooth channel. The results show that flow fields and temperature fields change with time when Re ≥100, and the larger Re is, the stronger change is. The results also show that when Re≥ 250, the vortexes will appear in the channel and the heat transfer will strengthen. The average Nusselt numbers computed are in agreement with the previously published experimental data.

关 键 词：回热器 数值计算 传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]