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首页> 外文期刊>International Journal of Heat and Mass Transfer >Local instantaneous heat transfer around a rising single Taylor bubble
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Local instantaneous heat transfer around a rising single Taylor bubble

机译：单个泰勒气泡上升周围的局部瞬时传热

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摘要

Due to the complexity and intermittent nature of gas-liquid slug flow, the existing data on the local instantaneous heat transfer in this flow regime is quite limited. To gain a better understanding of the heat transfer mechanism in vertical slug flow, transient local heat transfer measurements were performed around a single rising Taylor bubble. A part of the pipe wall was replaced by a thin electrically heated metal foil. Infrared video camera was used to determine the temporal variation of the temperature field along the foil. The camera was synchronized with the passage of the Taylor bubble using an optical sensor. This arrangement made it possible to obtain ensemble-averaged data on the heat transfer augmentation as a function of the location relative to the Taylor bubble's bottom for a range of operational conditions. The effect of the local hydrodynamic parameters on the heat transfer rate is discussed.
机译：由于气液段塞流的复杂性和间歇性，在这种流态下有关局部瞬时传热的现有数据非常有限。为了更好地了解垂直团状流中的传热机理，围绕单个上升泰勒气泡进行了瞬态局部传热测量。管壁的一部分被薄薄的电加热金属箔代替。使用红外摄像机确定沿箔片的温度场的时间变化。使用光学传感器使照相机与泰勒气泡的通过同步。这种布置使得有可能获得关于传热增加的整体平均数据，该数据是相对于一系列操作条件下相对于泰勒气泡底部的位置的函数。讨论了局部流体动力学参数对传热速率的影响。

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