热管型散热器换热性能的实验研究及数值模拟  

EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION ON THERMAL PERFORMANCE OF A HEATPIPE-TYPE HEAT SINK

作　　者：刘召军[1] 谢旭良[1,2] 李增耀[1] 屈治国[1] 陶文铨[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [2]长安大学汽车学院,陕西西安710064

出　　处：《工程热物理学报》2009年第7期1178-1180,共3页Journal of Engineering Thermophysics

基　　金：国家重点基础研究项目(973)(No.G2007CB206902)资助

摘　　要：本文对一种可用于LED组灯源的热管型散热器在大空间自然对流条件下的换热性能进行了实验研究和数值模拟,主要研究了散热器倾斜角度对其换热性能的影响。研究结果表明:散热器的倾斜角度对散热器的换热性能有较大影响,散热器换热性能随倾斜角度的增加先恶化再变好,在倾斜角度为30°左右时其换热性能最差;在相同倾斜角度下,辐射换热量随加热功率的增大呈近似线性增大,但辐射换热量占总换热量的比例较小,在7%以下。Experimental research and numerical simulation are conducted in this paper to investigate the influence of inclined angle on the thermal performance of heatpipe-type heat sink used for LED lamp cooling by natural convection in infinite space. It is found from the results that the inclined angle affects thermal performance significantly. The heat dissipation of the heat sink firstly deteriorates with increasing inclined angle, reaches its worst value around 30°, and then increases. In the same inclined angle condition, the radiation heat transfer increases progressively with power input. However, the ratio of radiation heat transfer over the total power input is below 7%.

关 键 词：热管型散热器 倾斜角度 换热性能 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]