射流冲击下矩形柱鳍热沉结构优化  

Optimization of rectangular pin fin heat sinks during air jet impingement

作　　者：涂福炳[1] 武荟芬[1] 周孑民[1] 曾文辉[1] 刘亮[1] 贾煜[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2012年第3期1171-1178,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50376076)

摘　　要：采用实验与数值计算相结合的方法对空气射流冲击下的矩形柱鳍热沉的肋片结构进行优化研究。对不同肋高和肋宽的矩形柱鳍热沉的热阻进行实验研究,并选用标准的kε湍流模型进行数值计算分析。研究结果表明:热阻随喷口雷诺数Re或喷口高径比H/D的增大而减小,但Re或H/D增大到一定程度时,热阻减小的幅度就不再明显;当热沉肋高范围为0.3≤Hf/L≤0.42、肋片宽度为Df/L=0.1时,热沉的散热能力与散热经济性之间能达到较好的平衡。将模拟结果与实验结果进行比较,相对误差在10%以内。The experimental and numerical method was done in the process of optimization of rectangular pin fin heat sink. The thermal resistance of a series of rectangular pin fin heat sinks with different fin height and width was experimented and calculated by theκ-ε model. The results show that the thermal resistance decreases as Renolds number （Re） and nozzle height-diameter ratio （H/D） increase, but this tend becomes less obvious as Re and H/D increase to some extent.When fin height scope of heat sink is between 15 and 21 mm, the balance of cooling ability and economical efficiency are reached. Comparing the simulation results with the experimental results, the correlated error does not exceed 10%.

关 键 词：空气冲击射流 矩形柱鳍热沉 热阻 数值模拟 肋片优化 

分 类 号：TK12[动力工程及工程热物理—工程热物理] TP391.9[动力工程及工程热物理—热能工程]