引入蒸汽对垂直管内降膜蒸发传热及流动的影响 |
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引用本文: | 孙平,林载祁.引入蒸汽对垂直管内降膜蒸发传热及流动的影响[J].化学工程,1993,21(5):15-19. |
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作者姓名: | 孙平 林载祁 |
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作者单位: | 大连理工大学,大连理工大学 东北电力试验研究所 |
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摘 要: | 对垂直管内引入饱和蒸汽的湍流降膜蒸发传热及流动进行实验研究。研究结果表明:管内引入饱和蒸汽,可以在不提高液膜传热温差的情况下,提高传热系数12%~25%,降低液膜厚度10%~20%,并得出相应的计算式。
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关 键 词: | 传热 降膜蒸发传热 垂直管内降膜蒸发 |
HEAT TRANSFER OF FALLING FILM IN VERTICAL TUBE WITH SUPERIMPOSED VAPOR FLOW |
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Abstract: | The experimental investigations of heat transfer and film flow of a turbulent falling film in a vertical tube with superimposed vapor flow were carried out. The experimental results show that the heat transfer coefficient increase in 10%-20% and the thickness of film decrease in 10%-20% with increasing vapor velocity at a constant temperature difference. A correlation is obtained to predict the heat transfer coefficient and film thickness. |
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