Study on the influence of viscosity on radial pressure difference of spiral flow in pipe
The radial differential pressure characteristics of oil-water two-phase spiral flow in the tube show a very good application prospect in multiphase flow measurement.Based on the computational fluid dynamics(CFD)method,Based on the computational fluid dynamics(CFD)method,the effects of different flow rates(10-80 m3/d),different water content(30%-90%)and different viscosity of oil phase(50-15000 mPa·s)on the radial pressure difference characteristics of oil-water two-phase flow in a pipe were studied.The flow field characteristics of oil-water two-phase spiral flow in pipes under different working conditions are analyzed,and the relationship between oil-water mixed flow rate,water content and radial pressure difference is revealed.The results show that:When the viscosity of oil phase is low,the oil-water two-phase flow will form a stable"oil-core+water ring"after passing through the cyclone.When the water content and the apparent flow rate of oil-water mixture remain constant,the radial pressure difference decreases gradually with the increase of the viscosity of oil phase.When the oil-phase viscosity exceeds 10000 mPa·s,the radial pressure difference is independent of the viscosity and only depends on the oil-water mixing flow rate.It is found that the radial pressure difference is highly correlated with the mixed flow rate of oil and water,which can be used to measure the flow rate of oil and water two-phase flow.
viscositythe spiral flowoil and water measurementnumerical simulationmultiphase flow
万方数据
维普
