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Experimental study on the enhancement of contact heat transfer by micro fin

机译：微翅片增强接触传热的实验研究

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摘要

A series of experiments was performed to investigate the enhancement effect of micro fin, contact pressure, and interface temperature on thermal contact conductance. The specimens were made of 7075 aluminum alloy. The contact surfaces of specimens with micro fin were specially machined such that two specimens were coaxially inlayed together. Contact pressure ranged from 2 MPa to 4.2 MPa, and interface temperature ranged from 165 degrees C to 180 degrees C and 215 degrees C to 227 degrees C. Experimental results showed that the micro fin could enhance thermal contact conductance, and the contact heat transfer enhancement effects caused by the micro fin gradually increased with contact pressure. Thermal contact conductance was high under higher interface temperature. The loading process changed the enhancing effect of the micro fin, and enhancement of contact heat transfer was greater in the unloading process than in the loading process. A qualitative analysis on the enhancement effect was conducted to explain the contact heat transfer enhancement effect for different micro-finned surfaces. (C) 2019 Elsevier Ltd. All rights reserved.
机译：进行了一系列实验以研究微翅片，接触压力和界面温度对热接触电导率的增强作用。标本由7075铝合金制成。样品与微翅片的接触面经过特殊加工，使得两个样品同轴地镶嵌在一起。接触压力范围为2 MPa至4.2 MPa，界面温度范围为165°C至180°C和215°C至227°C。实验结果表明，微鳍片可增强热接触传导性，并增强接触热传递微鳍引起的效应随着接触压力的增加而逐渐增加。在较高的界面温度下，热接触电导率很高。加载过程改变了微翅片的增强效果，并且与加载过程相比，卸载过程中接触传热的增强更大。对增强效果进行了定性分析，以解释不同微翅片表面的接触传热增强效果。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 作者

    Dou Ruifeng; Li Qiuhao; Zhu Cheng; Zhang Rongzhao; Wen Zhi; Liu Xunliang;

  • 作者单位

    Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China|Beijing Key Lab Energy Saving & Emiss Reduct Met, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China|Beijing Key Lab Energy Saving & Emiss Reduct Met, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China|Beijing Key Lab Energy Saving & Emiss Reduct Met, Beijing 100083, Peoples R 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

    Thermal contact conductance; Micro fin; Contact pressure; Interface temperature;

    机译：导热系数;微翅片;接触压力;接口温度;

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