PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger

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PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger

WEN Jian(文键), LI Yanzhong(厉彦忠), ZHOU Aimin(周爱民) and MA Yansong(马岩松)

Department of Refrigeration and Cryogenics Engineering，Xi’an Jiaotong University, Xi’an 710049, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-02-28 发布日期:2006-02-28
通讯作者: LI Yanzhong(厉彦忠)

PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger

Received:1900-01-01 Revised:1900-01-01 Online:2006-02-28 Published:2006-02-28

摘要/Abstract

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 install-ing the punched baffle. The results suggest room for the optimum design of plate-fin heat exchanger.

关键词: plate-fin heat exchanger;particle image velocimetry;entrance configuration;optimum design

Key words: plate-fin heat exchanger, particle image velocimetry, entrance configuration, optimum design

WEN Jian(文键), LI Yanzhong(厉彦忠), ZHOU Aimin(周爱民) and MA Yansong(马岩松). PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger[J]. CIESC Journal.

WEN Jian(文键), LI Yanzhong(厉彦忠), ZHOU Aimin(周爱民) and MA Yansong(马岩松). PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger[J]. .

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PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger

PIV Investigations of Flow Patterns in the Entrance Configuration of Plate-fin Heat Exchanger

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