A quantitative investigation on the visualization experiment of the intermittent flow in a helically coiled tube

被引：2

作者：

Liu, Gang ^{[1
]}

Zhang, Xilin ^{[2
,3
]}

Wang, Yue ^{[1
]}

Ren, Wanlong ^{[1
]}

Hua, Zhili ^{[1
]}

Hao, Zongrui ^{[1
]}

机构：

[1] Qilu Univ Technol, Inst Oceanog Instrumentat, Shandong Acad Sci, Qingdao 266100, Peoples R China

[2] Minist Nat Resources, Qingdao Inst Marine Geol, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China

[3] Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China

来源：

OCEAN ENGINEERING | 2024年 / 313卷

基金：

中国国家自然科学基金;

关键词：

Intermittent flow; Helically coiled tube; Visualization experiment; Gray intensity; Transient translational velocity of the; elongated bubble; LIQUID SLUG FLOW; STATISTICAL PARAMETERS; 2-PHASE FLOW; HYDRODYNAMIC CHARACTERISTICS; LONG BUBBLES; TRANSITION; EVOLUTION; INITIATION; VISCOSITY; REGIMES;

D O I：

10.1016/j.oceaneng.2024.119505

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

Visualization experiments were often used to observe the flow patterns of gas-liquid two-phase flow. The development of high-speed camera technology in recent years induces an increase of the tendency for quantitative measurements of flow characteristics through visual observations. In this work the characteristics of intermittent flow in a helically coiled tube (HCT) are extracted quantitatively by introducing the gray intensity of the images. The variations of the flow patterns at several typical points of the tube are monitored to explore a series of unique intermittent flow phenomena in the HCT. It is found that the gas-liquid interface would vary from long wavelength fluctuations to the short wavelength and large wave number fluctuations by increasing the liquid flow rate. In addition, a new approach to calculate the transient translational velocity of the elongated bubble is proposed by using the distributions of the gray intensity. The research design in this work may supply a frame to extract the flow structures of multiphase flows quantitatively from a visualization experiment.

引用

页数：23

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