软管隔膜泵球阀的压力损失数值模拟

Numerical Simulation of Pressureloss of Hose Diaphragm Pump Ball Valve

软管隔膜泵作为目前最先进的浆体的核心输送设备,可以很好地解决输送物料具有化学侵蚀性、毒性的难题。为了研究软管隔膜泵球阀中浆料的流动特性和压力损失变化,采用了Eulerian多相流模型对球阀进行了数值模拟,探究了流场特性、颗粒种类和颗粒体积分数对球阀压力损失的影响。数值模拟的结果表明:球阀在正常工作状态下,通过球阀的浆料压力损失随着浆料流速的增大而增大。随着球阀开度的增大而减小。混合浆料中颗粒的体积分数越大球阀压力损失越大;颗粒的直径越大球阀的压力损失也越大。颗粒体积分数和颗粒直径相比于球阀入口流速和球阀开度对球阀压力损失的影响并不显著。其中影响最为显著的是球阀开度。

As the most advanced slurry core conveying equipment,the hose diaphragm pump can well solve the problem of chemical erosion and toxicity of conveying materials.In order to study the flow characteristics and pressure loss of slurry in the ball valve of hose diaphragm pump,the Eulerian multiphase flow model was used to simulate the ball valve numerically,and the effects of flow field characteristics,particle type and particle volume fraction on the pressure loss of the ball valve were investigated.The numerical simulation results show that the slurry pressure loss through the ball valve increases with the increase of slurry velocity when the ball valve is working normally.Decreases with the increase of ball valve opening.The greater the volume fraction of the particles in the mixed slurry,the greater the pressure loss of the ball valve;the larger the diameter of the particle,the greater the pressure loss of the ball valve.The influence of particle volume fraction and particle diameter on pressure loss of ball valve is not significant compared with inlet velocity and valve opening.The most significant effect is the ball valve opening.