交叉缩放椭圆管换热与流阻实验研究及分析  

EXPERIMENTAL AND NUMERIC STUDY ON HEAT TRANSFER AND FLOW RESISTANCE IN ALTERNATING ELLIPTICAL AXIS TUBES

作　　者：孟继安[1] 陈泽敬[1] 李志信[1] 过增元[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《工程热物理学报》2004年第5期813-815,共3页Journal of Engineering Thermophysics

基　　金：国家重大基础研究发展规划资助项目(No.G20000263)

摘　　要：对交叉缩放椭圆管进行了实验和数值研究,给出了换热和沿程阻力系数实验拟合关联式。交叉缩放椭圆管管内 截面交叉变化诱导产生强烈的二次流和纵向涡流,改善了速度场与温度场之间的协同关系。实验和数值模拟结果表明,交 叉缩放椭圆管管内的流动在Re≥500即表现为湍流,换热强化效果显著。An experimental and numeric study was carried out for the alternating elliptical axis tubes. The fitted correlation was derived for the experimental heat transfer and resistance coefficients. The strong secondary flow and multi-longitudinal vortex flow induced by the cross-sectional change in the alternating elliptical axis tubes could improve the coordination relationship between the velocity and the temperature fields. The experimental and numerical simulation results show that the flow in the alternating elliptical axis tubes turn into the turbulent flow with Re (?) 500 and has a remarkable enhancement.

关 键 词：对流换热 场协同 强化传热 交叉缩放椭圆管 

分 类 号：TK124[动力工程及工程热物理—工程热物理]