| 气液叉流下受热液膜的热质传递特性 |
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| 引用本文： | 蒋斌,王子云,付祥钊,王勇.气液叉流下受热液膜的热质传递特性[J].排灌机械,2011(5):432-436,450. |
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| 作者姓名： | 蒋斌 王子云 付祥钊 王勇 |
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| 作者单位： | 西南科技大学土木工程与建筑学院;四川大学建筑与环境学院;重庆大学三峡库区生态环境教育部重点实验室; |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAJ01A06-3); 西南科技大学博士基金资助项目(11zx7106) |
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| 摘 要： | 采用VOF两相流模型研究了气液叉流条件下受热液膜热质传递特性,在模型中添加了表面张力源项和气液相间传质源项.为了验证所建立模型的可靠性,采用非接触式红外热成像测温方法,进行了相应的气液叉流试验.对叉流条件下受热液膜热质传递过程进行了试验和模拟计算,结果显示无量纲壁面温度计算结果与试验结果吻合很好.应用所建立的模型,模拟计算并分析了表面张力、固液接触角、液膜流量等因素对液膜流动侧形和热质传递性能的影响,结果表明：在其他参数保持不变的情况下,表面张力从0.014 N/m增大到0.072 N/m的过程中,液膜覆盖面积由82.7%减小到73.2%;固液接触角从30°增大到60°的过程中,液膜覆盖面积由80.6%减小到69.4%;液膜流量越小,液膜厚度越小,越有利于液膜的蒸发;相反,较高的液膜流量会使液膜厚度增大,阻碍了液膜蒸发,从而使外掠过液膜的单位体积空气含湿量减小.
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| 关 键 词： | 液膜 气液叉流 表面张力 固液接触角 液膜流量 |
Heat and mass transfer of heated falling film under gas-liquid cross-flow condition |
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| Jiang Bin,Wang Ziyun,Fu Xiangzhao,Wang Yong.Heat and mass transfer of heated falling film under gas-liquid cross-flow condition[J].Drainage and Irrigation Machinery,2011(5):432-436,450. |
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| Authors: | Jiang Bin Wang Ziyun Fu Xiangzhao Wang Yong |
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| Institution: | Jiang Bin1,Wang Ziyun2,Fu Xiangzhao3,Wang Yong3 |
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| Abstract: | Based on volume of fluid(VOF) method,heat and mass transfer of heated falling film under gas-liquid cross-flow condition was investigated.Surface tension and species transport were taken into account.In order to verify reliability of the model,the experiment was performed by non-contact infrared thermal imaging technology under gas-liquid cross-flow condition.Heat and mass transfer of heated falling film under gas-liquid cross-flow condition was investigated experimentally and theoretically.The results show... |
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| Keywords: | falling film gas-liquid cross-flow surface tension coefficient solid-liquid contact angle film flow rate |
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