多纵向涡对管内湍流换热特性影响的数值分析

工程热物理学报 , 2005, 26(3): 498-500.

1.清华大学航天航空学院,北京,100084

2.清华大学航天航空学院,北京,100084

3.清华大学航天航空学院,北京,100084

基金项目: 国家重点基础研究发展计划(973计划)(G20000263)

NUMERICAL ANALYSIS ON THE CHARACTERISTIC OF TURBULENT HEAT TRANSFER WITH MULTI LONGITUDINAL VORTEXES IN TUBE

对多纵向涡对管内湍流换热和流阻特性进行了数值分析.结果表明,多纵向涡可明显强化管内湍流换热,其流阻增加与换热增强相当.在计算范围内管内湍流换热时纵向涡对越多强化效果越好,多纵向涡的尺度应与热边界层厚度相当.同时,管内多纵向涡沿轴向还具有不易衰减的特性,这为多纵向涡的应用提供了方便.

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