Effect of Deflectors on the Flow Characteristics of a Square Pipe with a 90° Bend

doi:10.1007/s12204-021-2278-4

J Shanghai Jiaotong Univ Sci ›› 2021, Vol. 26 ›› Issue (2): 163-169.doi: 10.1007/s12204-021-2278-4

Effect of Deflectors on the Flow Characteristics of a Square Pipe with a 90° Bend

JIANG Chenqi (江晨琦), GONG Zhaoxin (宫兆新)

(a. School of Naval Architecture, Ocean and Civil Engineering; b. Key Laboratory of Hydrodynamics
(Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, China)

出版日期:2021-04-28 发布日期:2021-03-24
通讯作者: GONG Zhaoxin (宫兆新) E-mail:jackff@sjtu.edu.cn

Effect of Deflectors on the Flow Characteristics of a Square Pipe with a 90° Bend

JIANG Chenqi (江晨琦), GONG Zhaoxin (宫兆新)

(a. School of Naval Architecture, Ocean and Civil Engineering; b. Key Laboratory of Hydrodynamics
(Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, China)

Online:2021-04-28 Published:2021-03-24
Contact: GONG Zhaoxin (宫兆新) E-mail:jackff@sjtu.edu.cn

摘要/Abstract

摘要： Pipe flow is a classic hydrodynamic issue. Most pipelines contain bends, and bends cause energy loss and distort the flow because of secondary flow. Deflectors are often used to adjust the flow quality in a bend. In this study, a numerical simulation using ANSYS Fluent 19.0 is used to analyze the effects of the deflector number, location and angle on the flow characteristics of a square pipe with a 90° bend. The velocity non-uniformity and the head loss are analyzed quantitatively. The secondary flow is presented visually, and its evolution characteristics are assessed. An optimized installation scheme for the deflectors is discussed, and a reference is provided for controlling the flow quality in bends via deflectors.

关键词: bend, deflector, head loss, secondary flow

Abstract: Pipe flow is a classic hydrodynamic issue. Most pipelines contain bends, and bends cause energy loss and distort the flow because of secondary flow. Deflectors are often used to adjust the flow quality in a bend. In this study, a numerical simulation using ANSYS Fluent 19.0 is used to analyze the effects of the deflector number, location and angle on the flow characteristics of a square pipe with a 90° bend. The velocity non-uniformity and the head loss are analyzed quantitatively. The secondary flow is presented visually, and its evolution characteristics are assessed. An optimized installation scheme for the deflectors is discussed, and a reference is provided for controlling the flow quality in bends via deflectors.

Key words: bend, deflector, head loss, secondary flow

中图分类号:

O 352

JIANG Chenqi (江晨琦), GONG Zhaoxin (宫兆新) . Effect of Deflectors on the Flow Characteristics of a Square Pipe with a 90° Bend[J]. J Shanghai Jiaotong Univ Sci, 2021, 26(2): 163-169.

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Effect of Deflectors on the Flow Characteristics of a Square Pipe with a 90° Bend

Effect of Deflectors on the Flow Characteristics of a Square Pipe with a 90° Bend

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