Experimental study on the wall shear stress of slug flow under static and rolling conditions

被引：0

作者：

Li N. ^{[1
]}

Chen J. ^{[2
]}

Han J. ^{[1
]}

Zhao Q. ^{[1
]}

Zhang Y. ^{[1
]}

机构：

[1] School of Low-carbon Energy and Power Engineering, China University of Mining and Technology, Jiangsu, Xuzhou

[2] School of Chemical Engineering & Technology, China University of Mining and Technology, Jiangsu, Xuzhou

来源：

Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 12期

关键词：

gas holdup; gas-liquid flow; riser; slug flow; wall shear stress;

D O I：

10.11949/0438-1157.20230939

中图分类号：

O35 [流体力学];

学科分类号：

080103 ; 080704 ;

摘要：

Wall shear stress is a key parameter in the near wall transfer process of gas-liquid two-phase flow. Based on the limit diffusion current method, the wall shear stress characteristics of gas-liquid two-phase slug flow in an upward tube under rolling condition were experimentally studied, and the radial distribution and axial evolution of the wall shear stress were obtained. The test section is 2.3 m in height, the rolling amplitude and frequency are in the ranges of 10 mm to 30 mm and 1 Hz to 2.5 Hz, respectively. The results show that the intermittent flow of Taylor bubbles and liquid plugs under slug flow causes the transient wall shear stress to have pulsating characteristics. The radial distribution of the wall shear stress under static conditions is relatively uniform and slightly increases along the flow direction. As the rolling amplitude and frequency increase, the length of Taylor bubbles tends to be shorter, resulting in decrease in the peak region of transient wall shear stress. © 2023 Materials China. All rights reserved.

引用

页码：4852 / 4862

页数：10

共 30 条

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