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首页> 外文期刊>International Journal of Heat and Mass Transfer >Enhancing heat transfer in a plate-fin heat sink using delta winglet vortex generators
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Enhancing heat transfer in a plate-fin heat sink using delta winglet vortex generators

机译：使用三角翼小涡流发生器增强板翅式散热器的传热

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In this study, both experiments and simulations are performed to investigate the thermal-fluid characteristics of a flat-fin heat sink with a pair of vortex generators installed in a cross flow channel. The effects of the distance between the trailing edges of the vortex generators, the distance between each vortex generator and the heat sink, the attack angle of the vortex generators, the height of the vortex generators, the configuration of the vortex generators, and the Reynolds number on the thermal-fluid performance of the plate-fin heat sink are elucidated. The performance of the heat sink with the vortex generators was compared to that without. The results thus obtained revealed that when the distance between the trailing edges of the vortex generators is too small, the thermal performance becomes worse because the air cannot easily flow into the heat sink. Regarding the effect of the position of the vortex generators on thermal performance, the best performance is achieve when the distance between the vortex generator trailing edges equals the length of the heat sink and the distance between the trailing edge of each vortex generator and the front end of the heat sink is zero. An attack angle of the vortex generators of 30° is preferred to optimize the thermal resistance and pressure difference. Although heat transfer increases with the height of the vortex generators, the pressure difference also increases. Regarding the effect of the configuration of the vortex generators on the performance of the heat sink, a common-flow-up configuration outperforms a common-flow-down configuration. The enhancement of the heat transfer of the heat sink by the use of vortex generators is greater, and the increase of the pressure difference is lower, at lower Reynolds numbers.
机译：在这项研究中，进行了实验和模拟，以研究带有横流通道中安装的一对涡流发生器的扁平翅片散热器的热流体特性。涡流发生器后缘之间的距离，每个涡流发生器与散热器之间的距离，涡流发生器的迎角，涡流发生器的高度，涡流发生器的构造以及雷诺兹的影响阐明了板翅式散热器的散热性能。比较了具有涡流发生器的散热器的性能和没有涡流发生器的散热器的性能。由此获得的结果表明，当涡流发生器的尾沿之间的距离太小时，由于空气不容易流入散热器，热性能变差。关于涡流发生器的位置对热性能的影响，当涡流发生器后缘之间的距离等于散热器的长度以及每个涡流发生器后缘与前端之间的距离时，可以获得最佳性能。的散热片数为零。涡流发生器的迎角最好为30°，以优化热阻和压力差。尽管传热随着涡流发生器的高度而增加，但是压力差也增加。关于涡流发生器的构造对散热器的性能的影响，共同向上流动的构造优于共同向下流动的构造。在较低的雷诺数下，使用涡流发生器对散热器的传热的增强更大，而压力差的增大则更低。

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