| 管侧流量分布均匀性对水平管降膜蒸发器换热的影响 |
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| 引用本文： | 郑美玲,王文.管侧流量分布均匀性对水平管降膜蒸发器换热的影响[J].机械工程学报,2011,47(22):140-146. |
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| 作者姓名： | 郑美玲 王文 |
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| 作者单位： | 上海交通大学制冷与低温工程研究所 上海200240 |
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| 基金项目： | 教育部新世纪人才资助项目 |
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| 摘 要： | 研究水平管降膜蒸发器的管侧物流分配对总换热性能的影响,建立水平管降膜蒸发器水侧流动的湍流数学模型,并借助计算流体力学软件,对额定负荷为600 kW的水平管降膜蒸发器进行水侧速度场及压力场的模拟计算.计算结果表明,水侧的流量分配存在着严重的不均匀,从而产生不均匀的压力场,进而增大干斑的产生比例,恶化了传热.经过计算,流量...
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| 关 键 词： | 降膜蒸发器 流量不均 数值模拟 干斑 |
Numerical Simulation on the Water Flow of Falling Film Evaporators on Horizontal Tubes |
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| ZHENG Meiling,WANG Wen.Numerical Simulation on the Water Flow of Falling Film Evaporators on Horizontal Tubes[J].Chinese Journal of Mechanical Engineering,2011,47(22):140-146. |
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| Authors: | ZHENG Meiling WANG Wen |
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| Affiliation: | ZHENG Meiling WANG Wen(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240) |
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| Abstract: | A study is carried out on the influence of fluid flow distribution in a falling film evaporator.A turbulence model on the water side flow is established and a falling film evaporator with rated load 600 kW is simulated by a computational fluid dynamics(CFD) program.It is found that the fluid flow and pressure misdistribution are very serious in the vertical direction of tubes,which increase the proportion of dry spots and deteriorate the heat transfer.To improve the situation,it is necessary to arrange stru... |
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| Keywords: | Falling film evaporator Flow uniformity Numerical simulation Dryout spots |
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