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首页> 外文期刊>International Journal of Heat and Mass Transfer >New theoretical models of evaporation heat transfer in horizontal microfin tubes
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New theoretical models of evaporation heat transfer in horizontal microfin tubes

机译：水平微翅片管中蒸发传热的新理论模型

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摘要

A stratified flow model and an annular flow model of evaporation heat transfer in horizontal microfin tubes have been proposed. In the stratified flow model, the contributions of thin film evaporation and nucleate boiling in the groove above the stratified liquid level were predicted by a previously reported numerical analysis and a newly developed correlation, respectively. The contributions of nucleate boiling and forced convection in the stratified liquid region were predicted by the new correlation and the Carnavos correlation, respectively. In the annular flow model, the contributions of nucleate boiling and forced convection were predicted by the new correlation and the Carnavos correlation in which the equivalent Reynolds number was introduced, respectively. The flow pattern transition curve between the stratified-wavy flow and the annular flow proposed by Kattan et al. was introduced to predict the heat transfer coefficient in the intermediate region by use of the two theoretical models. The predictions of the heat transfer coefficient compared well with available experimental data for ten tubes and four refrigerants.
机译：提出了水平微翅片管内蒸发传热的分层流模型和环形流模型。在分层流模型中，分别通过先前报道的数值分析和新开发的相关性来预测在分层液面以上的凹槽中薄膜蒸发和核沸腾的贡献。通过新的相关性和Carnavos相关性分别预测了分层液体区域中核沸腾和强制对流的贡献。在环形流动模型中，通过分别引入等效雷诺数的新相关性和Carnavos相关性预测了核沸腾和强制对流的贡献。 Kattan等人提出的分层波浪流和环形流之间的流型过渡曲线。介绍了使用两个理论模型来预测中间区域的传热系数。传热系数的预测与十个管道和四种制冷剂的可用实验数据进行了很好的比较。

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