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首页> 外文会议>日本冷凍空調学会学術講演会 >Heat Transfer and Flow Characteristic during Evaporation Inside a Horizontal Internally, Spirally Grooved Steel Tube
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Heat Transfer and Flow Characteristic during Evaporation Inside a Horizontal Internally, Spirally Grooved Steel Tube

机译：水平内部，螺旋沟槽钢管内蒸发过程中的传热和流动特性

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摘要

Circumferential distribution of tube wall temperature and evaporation heat transfer coefficients were obtained through the experiments of flow boiling inside a horizontal spirally grooved steel tube of 12mm average inner diameter using two fluorocarbons, HCFC123 and HCFC22. We discussed the liquid film formed on the heat transfer surface based on the circumferential distributions of wall temperatures and the characteristics of average heat transfer coefficients against vapor quality. From the point of view about the flow boiling heat transfer inside a tube, we classified the experimental data into four kinds of flow patters: annular flow, annular flow with liquid meniscus, separated flow with liquid meniscus and separated flow with dry surface. We developed the flow pattern map that has the form of vapor quality against mass velocity.
机译：通过使用两种碳氟碳，HCFC123和HCFC22的水平螺旋沟槽钢管内的流量沸腾的流动沸腾的实验，获得了管壁温度和蒸发传热系数的周向分布。我们讨论了基于壁温度的周向分布和蒸汽质量的平均传热系数特性在传热表面上形成的液体膜。从关于管内的流动沸腾热传递的角度来看，我们将实验数据分为四种流动平台：环形流动，带液体弯月面的环形流动，与液体弯月面分离，与干燥表面分开流动。我们开发了流动模式图，其具有抗质量速度的蒸汽质量形式。

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