方腔内竖直板混合对流换热的数值模拟  

NUMERICAL SIMULATION OF MIXED CONVECTION HEAT TRANSFER IN AN ENCLOSURE WITH VERTICAL ISOTHERMAL PLATE

作　　者：张翠珍[1] 杨茉[1] 单彦广[1] 章立新[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》2009年第2期309-311,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50576057);上海市重点学科建设项目资助(No.J50501)

摘　　要：对方腔内竖直板的层流混合对流换热进行了数值模拟。结果表明,竖直板处于水平方向两个不同位置时,竖直板背风面的混合对流换热量大于纯自然对流换热量。送风口高度比取0.667、0.767时,竖直板背风面的混合对流换热量大于纯自然对流换热量。当送风口高度比为0.167～0.467、0.767～0.867区间内,流动与换热得到定常解。在送风口高度比大于0.467小于0.767范围内,流动与换热为非定常解。Mixed convection in an enclosure with vertical isothermal plate was studied by numerical simulations. The results obtained show that the mixed convection heat transfer is stronger than the natural convection when vertical isothermal plate located at different locations in a horizontal direction. The mixed convection heat transfer is stronger than the natural convection when dimensionless height of air supply inlet is 0.667 and 0.767. The steady solutions can be obtained when dimensionless height of air supply inlet ranges from 0.167 to 0.467 and dimensionless height of air supply inlet ranges from 0.767 to 0.867. The unsteady solutions can be obtained when dimensionless height of air supply inlet is bigger than 0.467 and less than 0.767.

关 键 词：方腔 混合对流 换热 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]