锯齿型通道流动和换热的周期性研究  

NUMERICAL STUDY OF THE PERIODICITY OF THE FLOW AND HEAT TRANSFER IN A CORRUGATED CHANNEL

作　　者：卢玫[1] 董晶瑾[1] 李凌[1] 杨茉[1] 邹宽[2] 林高平[2] 

机构地区：[1]上海理工大学动力工程学院 [2]宝山钢铁股份有限公司,上海410076

出　　处：《工程热物理学报》2007年第2期274-276,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50476080);上海市教委发展基金(No.05EZ17)

摘　　要：本文对锯齿型通道内流动与换热的周期性进行了数值模拟。在Re=550～700范围内,入口段后的各几何周期的平均Nu数已随时间发生振荡,且随Re数增大,振荡起始位置朝入口方向移动；发生振荡的各几何周期的流场、无量纲温度场虽然在同一时刻不尽相同,但在不同的时刻可以找到近乎相同的流场和温度场,而且各几何周期平均Nu数其振荡幅度基本相同,对时间求平均值后也基本相同,因此仍具有周期性充分发展的一些特性．The periodicity of the flow and heat transfer in a corrugated channel is numerically investigated. It is found that the average Nu over each geometric cycle after the entrance starts to oscillate with the time for Re from 550 to 700, and the starting position of oscillation moves forward to the entrance with the increase of Re. Although the flow and temperature fields of each geometric cycle are different at the same moment, but very similar flow and temperature fields can be found at different moments. The amplitude of average Nu over each geometric cycle and its average value over the time are almost same. This indicates that the flow and the heat transfer are periodically fully developed.

关 键 词：数值模拟 周期性 流动与换热 锯齿型通道 

分 类 号：TK124[动力工程及工程热物理—工程热物理]