基于数值模拟的矩形微槽热沉流道的优化设计  

Design optimization of flow channel for rectangular microchannel heat sink based on numerical simulation

作　　者：刘震 邵宝东[1] 王丽凤[1] 杨洋[1] 任泽斌 LIU Zhen;SHAO Bao-dong;WANG Li-feng;YANG Yang;REN Ze-bin(Department of Architectural and civil Engineering,Kunming University of Science and Technology,650500,Ckunming)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《能源工程》2020年第4期19-25,49,共8页Energy Engineering

基　　金：国家自然科学基金资助项目(11462010)。

摘　　要：为了提高矩形微槽热沉的散热性能,首先利用热阻网络模型对数值方法进行验证;然后分别对斜槽开度u为0.2 mm时不同形式的流道进行数值模拟,找到最优的开槽方式;再以双排叉槽的斜槽开度u为设计变量,以热阻与泵功率为优化目标分别利用多项式回归与径向基函数进行代理模型的构建,通过精度分析,利用多目标遗传算法对径向基函数模型进行寻优,最后利用熵权TOPSIS法进行优化方案的选取。结果表明:泵功率随着斜槽开度的增大而逐渐降低,而热阻随着斜槽开度的增大先减小后增大。优化后槽道的斜槽开度u为0.3213 mm,与不开斜槽的矩形直槽道相比热阻与泵功率分别降低了26.62%与19.62%。In order to improve the heat dissipation performance of rectangular microchannel heat sink,the thermal resistance network model is used to verify the result of numerical simulation.A numerical simulation was carried out on different form flow channels with the opening of chute u 0.2 mm to obtainthe optimal slotting mode.Considering the opening of chute u of double-fork groove as design variable,and the thermal resistance and pump power as optimization goals,polynomial regression method and radial basis function were used to construct surrogate model,respectively.Through precision analysis,a multi-objective genetic algorithm is used to optimize the radial basis function model,and finally the entropy weight TOPSIS method is used to select optimization scheme.Results show that the pump power decreases with the increase of the opening of chute u,and the thermal resistance decreases first and then increases with the increase of u.The optimal opening of chute u is 0.3213 mm.Compared with the rectangular straight channel without chute,the thermal resistance and pump power are reduced by 26.62%and 19.62%respectively.

关 键 词：微槽热沉 数值模拟 热阻网络模型 径向基函数 优化设计 熵权TOPSIS法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]