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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical investigation on heat transfer and pressure drop of pin-fin array under the influence of rib turbulators induced vortices
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Numerical investigation on heat transfer and pressure drop of pin-fin array under the influence of rib turbulators induced vortices

机译：肋片湍流引起涡流影响的翅片阵列传热与压降数值研究

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摘要

The internal cooling systems usually consist of multiple types of structures such as ribs, pin-fins and impinging jets. The influence from upstream features could cause a significant change in performance for individual cooling technologies. The present study numerically investigated the entrance effect of rib induced vortices on pin-fin arrays' heat transfer performance. Four different rib configurations were employed in the upstream of pin-fin arrays. The flow field and heat transfer of each case were simulated by using the commercial software ANSYS CFX with the SST k-omega turbulence model. The investigation revealed that the ribs induced secondary flows significantly influenced the heat transfer distribution and flow field in pin-fin arrays, especially caused strong heat transfer variation along the spanwise direction. The presence of ribs came with enhancing heat transfer and reducing the pressure loss of pin-fin arrays. The 90 degrees rib had the best overall performance among the simulated configurations, outperforming the baseline by approximately 51%-77%. These results indicated great potential to improve pin-fin heat transfer by optimizing upstream features, and could benefit future design for the industries. (C) 2018 Elsevier Ltd. All rights reserved.
机译：内部冷却系统通常由多种类型的结构组成，例如肋，针状鳍片和冲击射流。上游功能的影响可能会导致单个冷却技术的性能发生重大变化。本研究通过数值研究肋条引起的涡流对针鳍阵列传热性能的影响。在针翅阵列的上游采用了四种不同的肋结构。通过使用商业软件ANSYS CFX和SST k-omega湍流模型来模拟每种情况的流场和传热。研究表明，肋骨引起的二次流显着影响了针翅阵列的传热分布和流场，特别是引起沿翼展方向的强烈传热变化。肋的存在可以增强热传递并减少针翅阵列的压力损失。 90度肋骨在模拟配置中具有最佳的总体性能，比基线高出大约51％-77％。这些结果表明，通过优化上游功能来改善针翅式传热的巨大潜力，并可能使该行业的未来设计受益。 （C）2018 Elsevier Ltd.保留所有权利。

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