| 液氮薄膜在切应力作用下的降膜流动和传热模型 |
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| 引用本文： | 谢英柏,赵成,汤建成,麦英铖. 液氮薄膜在切应力作用下的降膜流动和传热模型[J]. 低温工程, 2008, 0(6) |
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| 作者姓名： | 谢英柏 赵成 汤建成 麦英铖 |
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| 作者单位： | 华北电力大学能源与动力工程学院,保定,071003 |
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| 摘 要： | 以钎焊板式换热器当中液氮薄膜为研究对象,通过建立在切应力作用下层流饱和蒸发液氮薄膜的传热特性的物理模型,推导出了无量纲液膜厚度和表面传热系数与气液界面切应力、界面对流换热强度、初始雷诺数和流动长度之间的非线性关系式.
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| 关 键 词： | 液氮薄膜 层流 切应力 传热模型 |
Hydrodynamics and heat transfer of liquid nitrogen laminar falling films with interfacial shear stress |
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| Xie Yingbai,Zhao Cheng,Tang Jiancheng,Mai Yingcheng. Hydrodynamics and heat transfer of liquid nitrogen laminar falling films with interfacial shear stress[J]. Cryogenics, 2008, 0(6) |
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| Authors: | Xie Yingbai Zhao Cheng Tang Jiancheng Mai Yingcheng |
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| Abstract: | Liquid nitrogen film in the brazed heat exchanger was studied.The physical models of hydrodynamics and heat transfer were established for the laminar saturated falling film under countercurrent and cocurrent shearing stress.The nonlinear equations of film thickness and heat transfer coefficient on stream wise direction were given,including the effects of interfacial shear,the intensity of interfacial convection heat transfer and Reynolds numbers. |
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| Keywords: | liquid nitrogen film laminar flow interfacial shear stress heat transfer model |
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