Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV

doi:10.1016/j.cjche.2018.03.015

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (1): 1-9.DOI: 10.1016/j.cjche.2018.03.015

• Fluid Dynamics and Transport Phenomena • 下一篇

Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV

Lichen He, Weimin Yang, Changfeng Guan, Hua Yan, Lin Zheng, Xiahua Zuo

College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2017-12-09 修回日期:2018-03-26 出版日期:2019-01-28 发布日期:2019-01-31
通讯作者: Hua Yan
基金资助:
Supported by the National Natural Science Foundation of China (51576012).

Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV

Lichen He, Weimin Yang, Changfeng Guan, Hua Yan, Lin Zheng, Xiahua Zuo

College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2017-12-09 Revised:2018-03-26 Online:2019-01-28 Published:2019-01-31
Contact: Hua Yan
Supported by:
Supported by the National Natural Science Foundation of China (51576012).

摘要/Abstract

摘要： Rotor-assembled strand works as a typical tube insert to achieve heat transfer augmentation and scale inhibition in a heat exchanger. In this work, the PIV experiment regarding the flow fields in a circular tube inserted with rotor-assembled strand was conducted and the flow characteristics on transverse section and longitudinal section were analyzed. The results showed that swirling flow was produced in the tube inserted with rotors and it was particularly strong within the swing diameter of the rotor on the section that contains the rotor; the average turbulence intensity and the radial velocity were improved notably; the velocity vectors on the longitudinal section remained along the direction of a straight line; both the swirling flow and average turbulence intensity were higher for the rotor with three blades than for the rotor with two blades except that the radial velocity was approximate, but they were all reduced by enlarging the lead of the rotor. Characterization of the flow patterns in a circular tube contributes to understanding the heat transfer efficiency and scale inhibition performance of the rotor-assembled strand and provides guidance for its application.

关键词: Particle image velocimetry (PIV), Swirling flow, Rotor-assembled strand, Circular tube

Abstract: Rotor-assembled strand works as a typical tube insert to achieve heat transfer augmentation and scale inhibition in a heat exchanger. In this work, the PIV experiment regarding the flow fields in a circular tube inserted with rotor-assembled strand was conducted and the flow characteristics on transverse section and longitudinal section were analyzed. The results showed that swirling flow was produced in the tube inserted with rotors and it was particularly strong within the swing diameter of the rotor on the section that contains the rotor; the average turbulence intensity and the radial velocity were improved notably; the velocity vectors on the longitudinal section remained along the direction of a straight line; both the swirling flow and average turbulence intensity were higher for the rotor with three blades than for the rotor with two blades except that the radial velocity was approximate, but they were all reduced by enlarging the lead of the rotor. Characterization of the flow patterns in a circular tube contributes to understanding the heat transfer efficiency and scale inhibition performance of the rotor-assembled strand and provides guidance for its application.

Key words: Particle image velocimetry (PIV), Swirling flow, Rotor-assembled strand, Circular tube

Lichen He, Weimin Yang, Changfeng Guan, Hua Yan, Lin Zheng, Xiahua Zuo. Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV[J]. Chinese Journal of Chemical Engineering, 2019, 27(1): 1-9.

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Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV

Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV

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