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Experimental Investigation of Subcooled Flow Boiling in a Minichannel

机译：微型通道过冷沸腾的实验研究

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摘要

The present work presents experimental results of subcooled flow boiling heat transfer phenomena in minichannels. The experiments were conducted with high surface tension liquid (water), which clearly indicates that inertial effects are important for both momentum and thermal transport in minichannels. The test section is a horizontal AISI 316 stainless-steel minitube with internal diameter of 1.13 mm with uniform heated length of 250 mm and the tube is heated by AC electric current. The variation in wall temperature and pressure drop gives an indication of the different boiling regions along the axis of the horizontal tube. Based on sudden oscillations of the pressure drop and wall temperature, onset of nucleate boiling (ONB) is identified in the tube. During ONB, pressure drop and the fluctuations of fluid outlet temperature are observed near the exit of the test section. Predictive models for ONB were evaluated and Kandlikar's ONB model was found to agree well with the present data. Comparisons of experimental heat transfer coefficient in the subcooled boiling regime with the existing correlations are also presented.
机译：本工作提出了在小通道中过冷流动沸腾传热现象的实验结果。实验是使用高表面张力的液体（水）进行的，这清楚地表明，惯性效应对于微型通道中的动量和热传递都非常重要。测试部分是水平AISI 316不锈钢微型管，其内径为1.13毫米，均匀加热长度为250毫米，并且该管通过AC电流加热。壁温和压降的变化给出了沿水平管轴线的不同沸腾区域的指示。基于压降和壁温的突然波动，可以确定管中发生核沸腾（ONB）。在ONB期间，在测试部分的出口附近观察到压降和流体出口温度的波动。对ONB的预测模型进行了评估，发现Kandlikar的ONB模型与当前数据非常吻合。还提出了在过冷沸腾状态下实验传热系数与现有相关性的比较。

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  • 来源
    《Heat Transfer Engineering》 |2015年第4期|408-417|共10页
  • 作者

    MANOHARAN ARAVINTHAN; MUNIYANDI VENKATESAN; SARIT K. DAS; ARCOT R. BALAKRISHNAN;

  • 作者单位

    Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India;

    School of Mechanical Engineering, SASTRA University, Thanjavur, India;

    Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India;

    Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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