微通道高热流换热分析研究

摘要

Refrigeration has been the key issue for the development of high heat flux laser for a long time,because it is hard for the heat dissipation capability of traditional cooling methods to breakthrough 100 W/cm2.A couple of liquid cooling micro-channel radiators with water as medium are introduced in this paper,and the structure of cold plates based on V-groove is studied mainly.The influences of the inlet velocity,width of the micro-channel and ratio of the channel width to the rib on the heat transfer efficiency are simulated by finite element software.The position of branch manifold is further optimized to improve the uniformity of the maximum surface temperature distribution.It is shown that the heat sink capability of liquid cooling micro-channel radiators with V-groove cold plates could be up to 500 W/cm2.%冷却散热问题一直是制约高热流密度激光器进一步发展的关键问题,对于传统的冷却方法,其散热均很难以突破100 W/cm2。介绍了几种以水为工质的微通道液冷散热器结构,并重点分析研究了基于V型槽的微通道冷板结构。利用有限元分析软件,对影响换热效率的冷却工质入口流速,微通宽度,占空比进行了分析,并对分歧管的结构位置作了进一步改进,以改善最高表面温度分布均匀度。通过有限元软件的特征分析,结果表明：基于V型槽的微流道冷板,用水为冷却工质时,其散热能力可高达500 W/cm2。