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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental study of flow boiling performance of open-ring pin fin microchannels
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Experimental study of flow boiling performance of open-ring pin fin microchannels

机译：开环翅片微通道流沸性能试验研究

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摘要

A type of open-ring pin fin microchannels (ORPFM) was proposed and developed for advanced mi-crochannel heat sinks. They consist of an internal cavity for bubble nucleation and two inner small and outside large rings with separated and converged flow passages. Two arrangements of open-ring pin fins, inline and staggered ones, were prepared and compared for optimization. Flow boiling experiments were performed to assess the two-phase boiling performance of both inline and staggered ORPFM. Tests were conducted using subcooled deionized water with an inlet subcooling of 10°C and mass fluxes of 200 kg/m~2·s and 300 kg/m~2s. Two-phase boiling heat transfer performance, pressure drop and two-phase flow instabilities of the ORPFM were systematically explored. Experimental results indicated that both inline and staggered ORPFM samples presented a small wall superheat of 1-2°C for onset of nucleate boiling (ONB). Nucleate boiling, both nucleate boiling and thin film evaporation, and convective boiling in turn dominated with increasing heat flux and vapor quality for ORPFM. The inline ORPFM generally presented a 10% to 80% augmentation in boiling heat transfer at moderate and high heat fluxes, a 2%-20% smaller pressure drop, and more stable flow boiling process with a mitigation of two-phase flow instabilities than the staggered one. Therefore, the inline ORPFM seemed to be more favorable for high heat flux dissipation of advanced microchannel heat sinks.
机译：提出了一种型号的开齿销鳍片微通道（ORPFM），为先进的MI-Crochannel散热器开发。它们包括一个内腔，用于泡沫成核和两个内部小和外部大环，具有分离和融合的流动通道。制备并进行了两种开放式销翅片，内联和交错的布置，并比较优化。进行流沸实验以评估内联和交错orpfm的两相沸腾性能。使用过冷去离子水进行测试，其中入口过冷10℃和200kg / m〜2·s和300kg / m〜2s的质量助熔剂。系统地探索了两相沸腾的传热性能，压力下降和两相流动不稳定性。实验结果表明，内联和交错的ORPFM样品均为1-2°C的小壁过热，用于核心沸腾（ONB）。成核沸腾，核心沸腾和薄膜蒸发，以及对流沸腾的转弯，随着orpfm的增加而增加的热量通量和蒸气质量。内联orpfm通常在中等和高热量助焊剂下沸腾热传递中的增强量为10％至80％，压降2％-20％，更稳定的流沸腾工艺，具有减缓两相流动不稳定性交错了一个。因此，内联ORPFM似乎更有利地对先进的微通道散热器的高热量耗散。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第3期|120829.1-120829.13|共13页
  • 作者

    Daxiang Deng; Long Zeng; Wei Sun; Guang Pi; Yue Yang;

  • 作者单位

    School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Shenzhen 518055 China;

    School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Shenzhen 518055 China;

    School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Shenzhen 518055 China;

    Department of Mechanical & Electrical Engineering Xiamen University Xiamen 361005 China;

    School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Shenzhen 518055 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    MicroChannel heat sink; Flow boiling; Open-ring pin fin microchannels; Pin fin arrangement;

    机译：微通道散热器;流沸腾;开戒指鳍片微通道;别针排列;

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