| 切应力协同下受热过冷层流液膜的破断特性 |
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| 引用本文： | 叶学民,李春曦,阎维平.切应力协同下受热过冷层流液膜的破断特性[J].力学学报,2011,43(3):461-467. |
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| 作者姓名： | 叶学民 李春曦 阎维平 |
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| 作者单位： | 华北电力大学电站设备状态监测与控制教育部重点实验室 |
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| 基金项目： | 国家自然科学基金(10972077); 中央高校基本科研业务费(09MG33)资助项目~~ |
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| 摘 要： | 针对界面切应力协同下受热过冷层流液膜流动的破断过程, 建立了不同气液流向下的临界液膜厚度和最小润湿量的理论模型, 分析了不同驱动力作用下, 接触角、流体温度、界面切应力和壁面热流密度对液膜破断特性的影响. 研究表明: 临界液膜厚度和最小润湿量均随壁面热流密度的增加而增大; 重力驱动下的接触角影响在不同热流密度下有所不同, 流体温度在不同驱动力下对最小润湿量的影响截然相反; 同向切应力驱动下临界液膜厚度和最小润湿量随切应力增加而减小; 在重力和切应力协同驱动下, 同向切应力对最小润湿量的影响与重力和切应力所起作用的相对大小有关, 反向切应力使得临界液膜厚度和最小润湿量有所增大.
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| 关 键 词： | 最小润湿量 |
| 收稿时间： | 2009-11-09 |
| 修稿时间： | 2011-02-09 |
BREAKDOWN OF LOCALLY HEATED AND SUBCOOLED LAMINAR FILMS WITH INTERFACIAL SHEAR |
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| Ye Xuemin
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Li Chunxi
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Yan Weiping.BREAKDOWN OF LOCALLY HEATED AND SUBCOOLED LAMINAR FILMS WITH INTERFACIAL SHEAR[J].chinese journal of theoretical and applied mechanics,2011,43(3):461-467. |
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| Authors: | Ye Xuemin Li Chunxi Yan Weiping |
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| Institution: | Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University), Hebei Baoding 071003, China |
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| Abstract: | The theoretical models of critical film thickness and minimum wetting rate were established for locally heated and subcooled laminar films under different flow directions of gas and liquid,and the effects of the contact angle,film temperature,interfacial shear and heat flux were discussed driving by gravity or/and interfacial shear.The investigation shows that the critical film thickness and minimum wetting rate increase with increasing heat flux.The effect of contact angle is clearly different in different... |
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| Keywords: | subcooled film breakdown interfacial shear critical film thickness minimum wetting rate |
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