| 微细管内超临界二氧化碳冷却换热研究 |
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| 引用本文： | 张丽娜,王珂,董其伍. 微细管内超临界二氧化碳冷却换热研究[J]. 工程热物理学报, 2010, 0(3) |
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| 作者姓名： | 张丽娜 王珂 董其伍 |
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| 作者单位： | 郑州大学热能工程研究中心; |
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| 基金项目： | 河南省杰出人才创新基金项目(No.0221000600) |
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| 摘 要： | 本文对超临界二氧化碳在微细管内冷却对流换热进行数值模拟研究,分析不同流动方向和管径大小对超临界二氧化碳对流换热的影响,考察管内局部流体温度、管壁温度以及无量纲温度分布的变化。湍流模型采用低雷诺数YS模型。研究表明,在LPV范围比较大的截面,超临界二氧化碳局部换热系数达到最大值,同时管内传热受流动方向和管径的影响均较大。
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| 关 键 词： | 二氧化碳 数值模拟 超临界 对流换热 |
A COMPUTATIONAL STUDY OF COOLING HEAT TRANSFER OF SUPERCRITICAL CARBON DIOXIDE IN MINI-TUBE |
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| ZHANG Li-Na LIU Min-Shan DONG Qi-Wu. A COMPUTATIONAL STUDY OF COOLING HEAT TRANSFER OF SUPERCRITICAL CARBON DIOXIDE IN MINI-TUBE[J]. Journal of Engineering Thermophysics, 2010, 0(3) |
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| Authors: | ZHANG Li-Na LIU Min-Shan DONG Qi-Wu |
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| Affiliation: | Thermal Energy Engineering Research Centre;Zhengzhou University;Zhengzhou 450002;China |
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| Abstract: | Convective heat transfer of supercritical carbon dioxide flowing in miniature tubes under cooling condition was investigated numerically.Different flow direction and tube diameter which effect the heat transfer of supercritical carbon dioxide were researched.The change profiles of fluid local temperature,wall temperature and dimensionless temperature along flow direction were obtained. The low Reynolds number turbulent model,YS model,was adopted in the simulation.The results show that the heat transfer coef... |
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| Keywords: | carbon dioxide simulation supericritical convective heat transfer |
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