Numerical Simulation Analysis of Flow Field of a New Double-layer Cage-sleeve Throttle Valve
The cage-type throttle valve is one of the critical devices commonly used in high-pressure gas well exploitation.Pressure regulation and production regulation of high-pressure gas are achieved through the application of throttle valve,and the cage-type throttle value under low-temperature and high-pressure is among the critical devices commonly applied in the exploitation of high pressure gas well.The pressure and production of high-pressure gas is regulated through throttle value.Under low-temperature and high-pressure environment,the influence of Joule-Thomson effect makes the temperature lower when the fluid flow through the throttling orifice,which makes it easier to produce natural gas hydrates,affecting the production of natural gas.Due to the influence of Joule-Thomson effect,the temperature is lower when fluid flows through the throttling orifice,which makes it easier to produce natural gas hydrates,affecting the normal operation of natural gas production.Therefore,the performance of throttle value will directly influence the quality,cost and safety of production.Traditional cage-type throttle value bears some disadvantages such as poor pressure reduction effect,low throttling efficiency,and short lifespan.So based upon this point,the new double-layer cage-type throttle valve is employed as the basic model.The method of CFD numerical simulation is adopted to study the throttling characteristics of natural gas in the throttle valve.Additionally,the throttling performance is compared with the traditional cage-type throttle valve.Under the operation mode set,compared with the traditional cage-type throttle valve,the minimum pressure of new cage-type throttle value in the local throttling orifice reduces by 9.5％,the minimum temperature increases by 7.8％,and the maximum speed drops by 12.0％,which makes it less likely to produce a low-temperature and high-pressure environment for hydrate formation.What's more,the fluid in the new one has less erosion effect on the structure,thus its overall performance is better than the traditional structure.At the same time,the study figured out the influence law of changes in fluid flow parameters and the structure parameters of the throttling orifice on the throttling performance of new cage-type throttle value,which has a certain instructive implication for practical production and application.
cage type throttle valvethrottling effectnatural gas hydratenumerical simulationflow field analysis
万方数据
维普
