水利学报2019，Vol.50Issue(4)：516-523,8.DOI:10.13243/j.cnki.slxb.20180950
大口径活塞套筒式调流调压阀流动特性分析
Flow characteristics analysis of large-diameter flow and pressure regulating valve with piston sleeve
摘要
Abstract
Various flow and pressure conditions of pipeline can be adjusted by the flow and pressure regulating valve whose hydraulic regulation performance and flow characteristics greatly influence the efficient operation of pipeline system. In this research, the large-diameter flow and pressure regulating valve with piston sleeve of 2400 LT-41 X-10 Q type was investigated by the CFD code Fluent, combined with RNG k-εturbulence model and dynamic mesh. And flow characteristics of the valve was analyzed by comparing the steady-state conditions in different valve openings as well as transient conditions of the opening and closing processes. The results indicate that the dynamic flow coefficients in opening and closing processes are both less than the corresponding static flow coefficients in steady-state conditions, while the dynamic resistance coefficients are larger than the static ones instead, which is caused by the flow obstruction from piston sleeve movement. Corresponding to the opening and closing processes respectively, opposite transient lateral forces will exert on the piston sleeve and the force component in axial direction is significantly greater than those in other two directions. Due to the vacant travel used for fixing the sleeve near full valve opening, the lateral forces in vertical and horizontal direction will get to their peak magnitudes, which may influence the operation of driving mechanism or make the piston sleeve get stuck in these directions. Moreover, flow field distributions of velocity, pressure, turbulent kinetic energy and turbulent dissipation rate in different openings were compared to illustrate operation and flow characteristics of the flow and pressure regulating valve. The analysis results provide a guidance for selection and utilization of the flow and pressure regulating valve with piston sleeve.关键词
调流调压阀/流量系数/流阻系数/侧向力/流动特性Key words
flow and pressure regulating valve/flow coefficient/resistance coefficient/lateral force/flow characteristics分类
建筑与水利引用本文复制引用
李燕辉,廖志芳,蒋劲,王玉成,罗爽..大口径活塞套筒式调流调压阀流动特性分析[J].水利学报,2019,50(4):516-523,8.基金项目
国家自然科学基金资助项目(51879201) （51879201）
