带三角形槽和弧形肋微通道散热器的数值模拟研究

Numerical Simulation Study of A Microchannel Heat Sink With Triangular Cavities and Arc-Shaped Ribs

采用数值模拟方法研究了具有周期性排列的三角形槽和弧形肋的新型微通道散热器(MC-ATC)在雷诺数为147-736范围内的流动传热特性。通过与矩形微通道散热器(MC-RC)对比,分析了三角形槽和弧形肋对速度分布和温度分布的影响,并定义了综合性能因子来评价微通道散热器的性能。研究结果表明,三角形槽和弧形肋对改善流体流动和强化传热有重要影响。相比于MC-RC,MC-ATC整体温度显著降低,温度分布更加均匀;通道侧壁附近低流速区明显减小,整体流速显著提高。当雷诺数在736时,MC-ATC的综合性能因子达到1.75。

The performance of a new microchannel heat sink(MC-ATC)with triangular cavities and arc-shaped ribs arranged periodically in the Reynolds number range of 147-736 is numerically studied.The effects of the triangular cavities and arc-shaped ribs on velocity and temperature distributions are analyzed by comparing with the rectangular microchannel heat sink(MC-RC),and a comprehensive performance factor is defined to evaluate the performance of the microchannel heat sink.The results show that triangular cavities and arc-shaped ribs have significant effects on enhancing fluid flow and strengthening heat transfer.The overall temperature of MC-ATC is significantly lower and the temperature distribution is more uniform.The low flow velocity area near the channel side wall is also significantly reduced,and the overall flow velocity is significantly increased.When the Reynolds number is 736,the comprehensive performance factor of MC-ATC reaches 1.75.