| 水蒸气在竖直微细管外凝结传热特性研究 |
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| 引用本文： | 黄荣海,陈西平,严俊杰,王进仕.水蒸气在竖直微细管外凝结传热特性研究[J].工程热物理学报,2011(8). |
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| 作者姓名： | 黄荣海 陈西平 严俊杰 王进仕 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(No.50821064); 国家重点基础研究计划项目(973)(No.2009CB219803) |
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| 摘 要： | 针对不同压力和不同流速下的饱和水蒸气在竖直微细圆管(内外径分别为0.571 mm和0.793 mm)外的凝结传热特性分别进行了实验研究,分析了蒸气压力和蒸气流速对凝结传热特性的影响。实验结果表明,凝结传热表面传热系数随着蒸气流速的增加而增加,在较高的蒸气压力下增加的更明显,且大于相同实验条件下的Nusselt理论分析解。在蒸气流速为2 m·s~(-1)时,凝结传热系数随压力的变化不大;在4 m·s~(-1)和6 m·s~(-1)时,随着蒸气压力的升高,凝结表面传热系数明显增大。
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| 关 键 词： | 凝结传热 竖直微细圆管外 蒸气压力 蒸气流速 |
Research of Condensation Heat Transfer of Water Vapor on External Wall of Vertical Micro Tube |
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| HUANG Rong-Hai CHEN Xi-Ping YAN Jun-Jie WANG Jin-Shi.Research of Condensation Heat Transfer of Water Vapor on External Wall of Vertical Micro Tube[J].Journal of Engineering Thermophysics,2011(8). |
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| Authors: | HUANG Rong-Hai CHEN Xi-Ping YAN Jun-Jie WANG Jin-Shi |
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| Institution: | HUANG Rong-Hai CHEN Xi-Ping YAN Jun-Jie WANG Jin-Shi (State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | This article experimental studied effect of vapor pressure and vapor velocity on the condensation heat transfer characteristics of Saturated vapor on external wall of vertical micro tube(inner and outer diameter were 0.571/0.793 mm)were investigated,and analyzed the effect of vapor pressure and velocity on condensation heat transfer.The experimental result indicated that the condensation heat transfer coefficients increased with increasing vapor velocity,and the heat transfer coefficients increased signific... |
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| Keywords: | condensation heat transfer external wall of vertical micro tube vapor pressure vapor velocity |
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