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首页> 外文期刊>Heat Transfer Engineering >A Common Method for Calculation of Flow Boiling and Flow Condensation Heat Transfer Coefficients in Minichannels With Account of Nonadiabatic Effects
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A Common Method for Calculation of Flow Boiling and Flow Condensation Heat Transfer Coefficients in Minichannels With Account of Nonadiabatic Effects

机译：考虑非绝热效应的小通道内流动沸腾和冷凝水传热系数的通用计算方法

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摘要

Flow boiling and flow condensation are often regarded as two opposite or symmetrical phenomena; however, their description with a single correlation has yet to be suggested. In the case of flow boiling in minichannels there is mostly encountered the annular flow structure, where bubble generation is not present. A similar picture holds for the case of inside tube condensation, where annular flow structure predominates. In such a case the heat transfer coefficient is primarily dependent on the connective mechanism. In this article a method developed earlier by the authors is applied to calculations of the heat transfer coefficient for flow condensation. The modifications of interface shear stresses between flow boiling and flow condensation are considered through incorporation of the so-called blowing parameter, which differentiates between these two modes of heat transfer. Satisfactory consistency with well-established correlations for condensation has been found, as well as with selected experimental data.
机译：流动沸腾和流动凝结通常被认为是两种相反或对称的现象。但是，尚未提出它们具有单一相关性的描述。在微通道中沸腾的情况下，最常见的是环形流动结构，其中不产生气泡。对于内管冷凝的情况，类似的情况也适用，在这种情况下，环形流动结构占主导地位。在这种情况下，传热系数主要取决于连接机理。在本文中，作者采用了较早开发的方法来计算流动冷凝的传热系数。通过引入所谓的吹气参数来考虑在流沸腾和流冷凝之间的界面剪切应力的改变，该吹气参数区分了这两种传热模式。已经发现与冷凝物的已建立的相关性令人满意的一致性，以及与选定的实验数据。

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  • 来源
    《Heat Transfer Engineering》 |2011年第14期|p.1173-1181|共9页
  • 作者

    DARIUSZ MIKIELEWICZ; JAROSJAW MIKIELEWICZ;

  • 作者单位

    Heat Technology Department, Faculty of Mechanical Engineering, Gdansk University of Technology, Gdansk, Poland;

    Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Gdansk, Poland;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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