交叉缩放椭圆管换热与流阻实验研究及分析

工程热物理学报 , 2004, 25(5): 813-815.

1.清华大学工程力学系,北京,100084

2.清华大学工程力学系,北京,100084

3.清华大学工程力学系,北京,100084

4.清华大学工程力学系,北京,100084

基金项目: 国家重点基础研究发展计划(973计划)(G20000263)

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

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.

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