气体横掠单管强制对流换热的大涡模拟  

Large Eddy Simulation of Forced Convection Heat Exchange by Gases Sweeping Across a Single Tube

作　　者：魏英杰[1] 何钟怡[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《热能动力工程》2003年第3期259-262,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对气体横掠单管强制对流换热进行了数值模拟 ,分别计算了气体横掠圆管和方管时的温度场 ,得到了管壁平均换热系数 ,数值结果与实验关联式符合较好。同时还表明大涡模拟方法善于捕捉温度场以及流场涡系的时间演化过程 。By using a method of large eddy simulation combined with a second order full developed ETG finite element discrete scheme a numerical simulation was performed of the forced convection heat exchange by gases sweeping across a single tube. The temperature fields in the case of a circular tube and a square tube being swept by gases were calculated separately. As a result, an average heat exchange factor for tube walls was obtained. Numerical results agree relatively well with those of experimental correlation. Meanwhile, this also shows that the large eddy simulation method is especially effective in capturing temperature fields and the time evolution process of flow field eddy series and very suitable for the analysis of temperature fields involving the flow movement of large eddies.

关 键 词：横掠单管 强制对流换热 大涡模拟 温度场 

分 类 号：TK124[动力工程及工程热物理—工程热物理]