流体机械2017，Vol.45Issue(4)：1-6,6.DOI:10.3969/j.issn.1005-0329.2017.04.001
不同含气率下球阀内部流动特性试验及其数值模拟
Experimental Study and Numerical Simulation of Two-phase Flow Characteristics on Ball Valve under Different Gas Rate
摘要
Abstract
To study the flow field law of the inside of oil-gas multiphase pump,numerical simulation were employed to get gas-liquid two-phase distribution and velocity inside the ball valve and the differential pressure between inlet and outlet of oil-gas multiphase pump.In the meantime,pressure of inlet and outlet were measured by doing experiment on the ball valve to confirm the accuracy of numerical simulation.The results show that the differences between the numerical simulation data and the experiment data is less than 15%.Under the same opening height and the same flow,with the increase of gas content,the differential pressure inside the ball uniformly reduces more than 90%.In the same time,the decrease of fluid density does not make apparently change of the flow discharge coefficient and the flow resistance coefficient.From the cloud contours it can be see that there is vortex in the point A which at the end of the valve ball.Vortex in point a slightly increases with the increase of gas content.Because of the production of the secondary circulation in the sudden enlargement interface C,gas phase also increase in this place.On the contrary,the distribution of gas phase becomes less around the valve ball wall.Gas content has not great effect on velocity of ball valve gap,but have a certain influence on the flow regime.关键词
两相流/气液两相球阀/含气率/计算流体力学(CFD)Key words
two-phase flow/gas-liquid ball valve/gas fraction/computational fluid dynamics (CFD)分类
机械制造引用本文复制引用
卢圣旺,马艺,郑生宏,张生昌,邓鸿英,朱乐乐..不同含气率下球阀内部流动特性试验及其数值模拟[J].流体机械,2017,45(4):1-6,6.基金项目
国家自然科学基金资助项目(51406183) （51406183）
