| 竖管内蒸发降液膜流动的不稳定性分析 |
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| 引用本文： | 杜小泽,吴少融,姜胜耀,王补宣. 竖管内蒸发降液膜流动的不稳定性分析[J]. 原子能科学技术, 2001, 35(5): 406-410 |
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| 作者姓名： | 杜小泽 吴少融 姜胜耀 王补宣 |
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| 作者单位： | 1. 清华大学
2. 清华大学 热能工程系 |
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| 摘 要： | 引入能量分析方法,探讨流动的惯性力、气液界面和管壁界面上的表面张力对波动薄液膜的作功机制,从物理上解随液膜流动雷诺数及拢动波长的拉以及液膜波动加剧的规律。分析表明：液膜蒸发条件下的热流率增加造成壁面毛细吸附力维持液稳定的作用降低是导致液膜断裂的主要原因。
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| 关 键 词： | 降液膜 不稳定性分析 流动 蒸发降液膜 蒸发传热 |
| 文章编号： | 1000-6931(2001)05-0406-05 |
| 修稿时间： | 2000-07-10 |
Instability Analysis of Evaporating Falling Film Flow in Vertical Tube |
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| DU Xiao ze ,WU Shao rong ,JIANG Sheng yao ,WANG Bu xuan. Instability Analysis of Evaporating Falling Film Flow in Vertical Tube[J]. Atomic Energy Science and Technology, 2001, 35(5): 406-410 |
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| Authors: | DU Xiao ze WU Shao rong JIANG Sheng yao WANG Bu xuan |
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| Affiliation: | DU Xiao ze 1,WU Shao rong 1,JIANG Sheng yao 1,WANG Bu xuan 2 |
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| Abstract: | The Kelvin Helmholtz instability of evaporating falling film flow in vertical tube is studied by means of energy analysis. Based on the rules that the interfacial capillary waves come from the balance of works done by inertial force, surface tension on phase change interface, and also capillary force on tube wall, the stability behaviors of falling film with different Reynolds numbers and perturbation wavelength are explored in detail. The analysis indicates that the main reason of film breakup is that, the stability effect of capillary adsorbability on tube wall is weakened by increasing tube wall heat flux. |
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| Keywords: | falling film instability analysis evaporation flow |
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