Development of a Model for Pure Steam Condensation in a Vertical Tube
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摘要: 为提高大型热工水力程序对换热系数估测准确度,从竖直管内冷凝换热机理出发,通过求解守恒方程,分别建立适用于竖直管内纯蒸汽冷凝层流和湍流的机理模型。将开发的机理模型计算结果、RELAP5计算结果与Kuhn实验的层流和湍流实验数据对比,机理模型计算结果精度高于RELAP5,并与实验结果符合良好。Abstract: In order to improve the capability of thermal-hydraulic codes to predict the heat transfer coefficient（HTC）, an analytical model is developed based on the conservation equations. The calculated values of this model and of Relap5 were compared with the Kuhn’s experimental data. It is found that the model gives better prediction of HTC than Relap5, and it agrees well with the experimental data.
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Key words:
- Vertical tube /
- Condensation heat transfer /
- Analytical model /
- Annular flow /
- Laminar flow /
- Turbulent flow
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