蒸汽腔型热管散热器三维瞬态热分析

摘要

本文通过建立蒸汽腔型热管散热器三维非稳态计算模型，对不同风速及温度水平下的运行工况进行了对比热分析，并分析了冷凝段直肋厚度对蒸汽腔型热管散热器传热性能的影响。分析结果表明：冷凝段空气出口温度随热管壁温增大而增大，空气和肋片及热管壁面进行对流换热，热管壁温明显高于空气通道出口温度，冷凝段直肋起到很好的散热作用，能使冷凝段的工质冷却成液体并在重力和毛细力的作用下回流到蒸发段，从而保证蒸汽腔型热管散热器良好的传热性能和等温性能。%Three dimensional transient numerical model of VCHP (Heat Pipe Embedded with Vapour Chamber ) is built and the thermal performance is analyzed .The temperature field of air outlet is obtained .Analysis results show that cubic fins have great effect on heat elimination .The working fluid of VCHP condenses and flows back to the vapour section with the ef-fect of gravity and capillary force .Thus VCHP owns good performance of heat transfer and uniform temperature .When wind speed increases ,heat convection strengthens and the temperature difference between inlet and outlet of air channel decreases .