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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Prediction of the Transition Criterion to Annular Flow In Two-Phase Flow Pattern of Refrigerants
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Prediction of the Transition Criterion to Annular Flow In Two-Phase Flow Pattern of Refrigerants

机译：制冷剂两相流向环形流动过渡准则的预测

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摘要

Two-phase flow pattern data during horizontal in-tube flow boiling are presented for pure and mixed refrigerants of R134a and R123. The flow pattern is observed through tubular sight glasses located at inlet and outlet of the test section, which is made of a stainless steel tube, 2 m long with 10 mm I.D., 1.5 mm wall thickness. The obtained results are compared to the available various correlations for flow pattern. The flow pattern map of Hashizume was very well agreement with the present data except the region of low mass velocity. Weisman flow pattern map was also known to satisfactorily predict data for refrigerants in the region of annular flow. In order to establish the transition quality to annular flow in this study, flow pattern are simply classified into two groups; stratified (including intermittent, stratified and stratified-wavy) flow and unstratified (annular) flow. The transition quality from stratified to unstratified flow was obtained by modifying the liquid Froude number.
机译：给出了R134a和R123的纯制冷剂和混合制冷剂在水平管内沸腾过程中的两相流态数据。通过位于测试部分入口和出口的管状观察镜观察流动模式，该观察镜由长2 m，内径10 mm，壁厚1.5 mm的不锈钢管制成。将获得的结果与流动模式的可用各种相关性进行比较。 Hashizume的流型图与当前数据非常吻合，除了低质量速度区域。众所周知，韦斯曼流型图可以令人满意地预测环形流区域内制冷剂的数据。为了确定本研究中向环形流的过渡质量，将流型简单地分为两类。分层（包括间歇，分层和分层-波浪形）流和非分层（环形）流。通过修改液体弗洛德数，可以得到从分层流到非分层流的过渡质量。

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