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

doi:10.1016/j.cjche.2018.03.015

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

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- 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
- 中国化学工程学报（英文版） 2019年27卷第1期页码：1-9
- Affiliations：
  
  College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology,Beijing,China,100029
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.03.015
  中图分类号：
- 纸质出版：2019
- Accepted：
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Lichen He, Weimin Yang, Changfeng Guan, 等. Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV[J]. 中国化学工程学报（英文版）, 2019,27(1):1-9.

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]. Chin.J.Chem.Eng., 2019, 27(1): 1-9.
Lichen He, Weimin Yang, Changfeng Guan, 等. Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV[J]. 中国化学工程学报（英文版）, 2019,27(1):1-9. DOI： 10.1016/j.cjche.2018.03.015.

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]. Chin.J.Chem.Eng., 2019, 27(1): 1-9. DOI： 10.1016/j.cjche.2018.03.015.

摘要

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.

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