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首页> 外文会议>日本伝熱シンポジウム >Heat transfer enhancement and flow characteristics in finned-tube heat exchangers with winglet-type vortex generators
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Heat transfer enhancement and flow characteristics in finned-tube heat exchangers with winglet-type vortex generators

机译：翼叶型涡流发电机翅片管热交换器中的传热增强和流动特性

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摘要

To investigate the effect of longitudinal vortices behind tubes, we have performed flindamental experiments on heat transfer and pressure loss with finned-tube bundles having vortex generators mounted on the fin surfaces. The overall heat transfer on the fin has been measured by a transient heat transfer experiment based on modified single-blow method in the Reynolds number range of 300 to 2700. The measured heat transfer and pressure loss of test cores with winglet-type vortex generators were compared to those of finned-tube without vortex generator under the similar conditions. The effect caused by vortex generators shows 10-25% increase in the heat transfer enhancement, 20-35% increase in the pressure loss, in comparison with finned-tube bundles without vortex generators.
机译：为了探讨纵向涡流的效果，我们已经对传热和压力损失进行了翅片管束的闪烁试验，该翅片管束安装在翅片表面上。通过基于300至2700的Reynolds数范围内的改进的单吹法测量翅片的整体传热来测量。用翅翼型涡流发生器测量的热传递和压力损失与类似条件下没有涡流发生器的翅片管相比。涡流发生器引起的效果显示出热传递增强的10-25％，压力损失增加20-35％，与没有涡流发生器的翅片管束相比，压力损失增加。

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