球阀开度及入口速度对固-液两相流场的影响

Influence of opening and inlet velocity of the ball valve on solid-liquid two-phase flow field

球阀广泛应用于固-液两相流的运输和流量调节。利用有限元软件研究球阀不同开度和不同入口速度下流场的变化,对于设计、制造球阀及优化球阀结构具有一定的指导意义。结果表明,阀门开度越大,轴截面流线越平直,压力梯度、速度梯度和流阻系数越小,流动状态越稳定;入口速度越大,轴截面流线越弯曲,压力和速度变化越明显,流动状态越紊乱,但流阻系数与入口流速无关。

Ball valves are widely used in the fluid transport and flow regulation for the solid-liquid two-phase flow.In this paper,finite element software was used to investigate the flow field of a ball valve with different opening and inlet velocity,which had certain guiding significance for the design,manufacture,and the structure optimization of the ball valves.The results show that when the valve opening is large,the streamlines of the axial section are flatter,the pressure gradient,velocity gradient and flow resistance coefficient are smaller,and the flow state is more stable.When the inlet velocity is large,the streamlines of the axial section are more curved,the pressure and velocity change is more obvious,and the flow state is more derangement.However,the flow resistance coefficient has no relationship with the inlet velocity.