带有方形肋及双倾斜肋片的细通道内流动、传热和熵产分析

为了探究带有方形肋及双倾斜肋片细通道的流动换热及熵产特性，设计了2种带有方形肋及双倾斜肋片的组合细通道(MCDS-L, MCDS-R)，然后采用数值模拟的方法分析其流动特性、传热特性和熵产特性，并将其分析结果同2种方形肋细通道(MCS-L, MCS-R)和一种双倾斜肋片细通道(MCD)进行对比。结果表明，在所研究的雷诺数范围内，组合通道的摩擦阻力系数基本一致且均高于其他3组通道(MCS-L, MCS-R, MCD) 。此外，组合通道的努塞尔数均高于其他3组通道，而熵产增大数均低于其他3组通道。其中，MCDS-L通道的努塞尔数最大，熵产增大数最低。表明MCDS-L通道的换热效果最佳，能量的综合利用程度最高。研究成果为微细通道热沉的设计提供参考。

Analysis of Flow,Heat Transfer and Entropy Production in a Mini -channel with Square Rib and Double Inclined Rib

In order to investigate the flow, heat transfer and entropy production characteristics in a mini-channel with double-inclined and square rib, two combined mini-channels with double-inclined and square rib (MCDS-L and MCDS-R) were designed. The flow, heat transfer and entropy production characteristics in two combined mini-channels were analyzed using numerical simulation method. Also the analysis results were compared with two mini-channels with square rib (MCS-L, MCS-R) and a mini-channel with double-inclined rib (MCD). The results show that in the range of Reynolds number, the friction factor of two combined channels was almost consistent and higher than that of the other three channels (MCS-L, MCS-R and MCD). In addition, the Nusselt number of two combined channels is also higher than that of the other three channels, but the augmentation entropy generation number was lower than that of the other three channels. The Nusselt number of MCDS-L was the largest and the augmentation entropy generation number was the lowest compared to other channels, which indicated that the heat transfer effect of MCDS-L was the best and the comprehensive utilization of energy is the highest . The research results can provide reference for the design of microchannel heat sink.