| PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger |
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| 引用本文： | 文键,厉彦忠,周爱民,马岩松. PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger[J]. 中国化学工程学报, 2006, 14(1): 15-23. DOI: 10.1016/S1004-9541(06)60032-3 |
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| 作者姓名： | 文键 厉彦忠 周爱民 马岩松 |
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| 作者单位： | Department of Refrigeration and Cryogenics Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China |
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| 基金项目： | Supported by the Foundation for Excellent Doctoral Dissertation Author by Ministry of Education of China （No. 199933）. |
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| 摘 要： | Flow characteristics in the entrance of plate-fin heat exchanger have been investigated by means of particle image velocimetry （PIV）. The flow field was measured using the two-frame cross-correlation technique. Streamline and velocity contour graphs at different cross-sections were obtained in the experiment. The experimental results indicate that flow maldistribution in the conventional header is very serious, while the improved header configuration with punched baffle can effectively improve the uniformity. The flow maldistribution parameter in plate-fin heat exchanger has been reduced from 1.21 to 0.21, and the ratio of the maximum velocity to the minimum is reduced from 23.2 to 1.8 by installing the punched baffle. The results suggest room for the optimum design of plate-fin heat exchanger.
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| 关 键 词： | PIV技术 板翅式换热器 入口结构 流场 最优设计 |
| 收稿时间： | 2005-04-11 |
| 修稿时间： | 2005-04-112005-10-26 |
PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger |
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| Jian WEN, Yanzhong LI, Aimin ZHOU,Yansong MA. PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger[J]. Chinese Journal of Chemical Engineering, 2006, 14(1): 15-23. DOI: 10.1016/S1004-9541(06)60032-3 |
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| Authors: | Jian WEN Yanzhong LI Aimin ZHOU Yansong MA |
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| Affiliation: | Department of Refrigeration and Cryogenics Engineering, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | Flow characteristics in the entrance of plate-fin heat exchanger have been investigated by means of particle image velocimetry (PIV). The flow field was measured using the two-frame cross-correlation technique. Streamline and velocity contour graphs at different cross-sections were obtained in the experiment. The experimental results indicate that flow maldistribution in the conventional header is very serious, while the improved header configuration with punched baffle can effectively improve the uniformity. The flow maldistribution parameter in plate-fin heat exchanger has been reduced from 1.21 to 0.21, and the ratio of the maximum velocity to the minimum is reduced from 23.2 to 1.8 by installing the punched baffle. The results suggest room for the optimum design of plate-fm heat exchanger. |
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| Keywords: | plate-fin heat exchanger particle image velocimetry entrance configuration optimum design |
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