Numerical simulation on flow characteristics and pressure loss of solid-liquid two-phase flow in ball valve

被引：0
|
作者：
Shi X. [1 ]
Gong L. [1 ]
Tao H. [1 ]
Li L. [1 ]
Li J. [1 ]
机构：
[1] College of Civil Engineering, Lanzhou Jiaotong University, Lanzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Eulerian model; Flow characteristics; Pressure loss; PVC ball valve;
D O I：
10.11817/j.issn.1672-7207.2021.05.029
中图分类号：
学科分类号：
摘要：
To study the flow characteristics of solid-liquid two-phase flow and pressure loss of PVC ball valves in PVC ball valve, Eulerian multiphase flow model was adopted to simulate DN75 ball valve. The flow field characteristics, particle distribution and pressure loss of ball valve were discussed, and the influencing factors were evaluated. The results show that the opening of ball valve has great influence on flow field. The gradient of mixed flow velocity in the valve core increases with the decrease of valve opening, and a whirlpool forms behind the valve. The scale of the whirlpool increases with the decrease of valve opening. The distribution of particle volume fraction in the inlet sections of the valve is basically similar at different openings, while in the core and outlet sections, it is disorder at small openings. The pressure loss of mixed flow increases with the increase of flow velocity, and decreases with the increase of ball valve opening and increases with the increase of particle volume fraction. The changes of pressure loss with particle size is related to valve opening, which increases with the increase of particle size when the opening is 70°-90° and decreases when the opening is 40°-60°. Taking the significance level α=0.05 as test standard, multi-factor variance analysis shows that the influence of particle volume fraction and particle size on pressure loss is not significant. However, the flow rate and the ball valve opening have significant effects on the pressure loss, and the valve opening is the most significant factor. © 2021, Central South University Press. All right reserved.
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页码：1681 / 1691
页数：10
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