带有双倾斜肋片的细通道内液体流动与传热特性

Fluid Flow and Heat Transfer of Mini-Channel with Double-Inclined Ribs

为提高细通道热沉的传热性能,设计了一种内置双倾斜肋片的细通道热沉。通过数值模拟的方法对双倾斜肋片细通道的传热特性、流动特性以及综合性能进行研究。分析了在一定雷诺数范围内细通道的摩擦阻力因数、努塞尔数、综合性能评估值以及总热阻的变化情况。结果表明:在雷诺数较低时肋片长度为1.5 mm的通道综合传热性能最佳,在雷诺数较高时肋片长度为1.0 mm的通道综合传热性能最佳。综上可知加入双倾斜肋片的细通道可以增加传热,并降低总热阻从而有效地提高传热性能。

In order to improve the heat transfer performance of the mini-channel heat sink,a mini-channel heat sink with double inclined ribs was designed. The numerical simulation method was used to study the heat transfer characteristics,flow characteristics and comprehensive properties of the mini-channel of double inclined fins. The friction resistance factor,Nusselt number,comprehensive performance evaluation value and total thermal resistance of the mini-channel in a certain Reynolds number range were analyzed. The results show that when the Reynolds number is low,the overall heat transfer performance of the channel with a rib length of 1. 5 mm is the best. When the Reynolds number is high,the channel with a 1. 0 mm rib length has the best overall heat transfer performance. In summary,it can be seen that the addition of the mini-channel of the double inclined fins can increase the heat transfer and reduce the total thermal resistance to effectively improve the heat transfer performance.