华中科技大学学报（自然科学版）2023，Vol.51Issue(12)：52-59,8.DOI:10.13245/j.hust.231272
基于对冲能耗与多级流阻的调节阀减压控速机理研究
Study on pressure reduction and speed control mechanism of regulating valve based on energy consumption and multistage flow resistance
摘要
Abstract
At present,labyrinth and multi-stage sleeve control vales have problems such as unstable pressure reduction and speed control and serious cavitation under high temperature and high pressure differential conditions.An ant-hole multi-stage control valve was proposed based on the compound pressure reduction of fluid hedging energy consumption and multi-stage flow resistance.The throttling element inside the valve core was composed of space angle and opposed flow channel,which can realize the compound pressure reduction of opposed energy consumption and multi-stage angle flow resistance.The energy dissipation can be realized by the vortex at the hedge and corner,and the fluid pressure was reduced,realizing the gradual reduction of fluid pressure.Through computational fluid dynamics(CFD)simulation,the variation of inter-stage pressure and velocity of throttling element with step-down stages and different pressure levels were analyzed.The simulation results show that the depressurization efficiency of the counter flow passage with the composite depressurization structure is three times than that of the single corner depressurization(traditional labyrinth depressurization structure),and the composite depressurization efficiency is significantly improved.The throttle element,which adopts the multi-stage flow resistance and fluid hedge composite depressurization principle,has better linear and stable pressure reduction and speed control performance under different stages.Finally,a test platform is built to test the pressure of the throttling elements under different depressurization stages.The test results are in good agreement with the simulation results,which verifies the correctness of the theoretical analysis.关键词
多级调节阀/复合减压控速/对冲流道/计算流体力学(CFD)/流场仿真/降压特性Key words
multi-stage regulating valve/compound decompression and speed control/counter flow channel/computational fluid dynamics(CFD)/CFD simulation/depressurization characteristics分类
机械制造引用本文复制引用
韩明兴,丁爽爽,马玉山,刘银水,崔岩..基于对冲能耗与多级流阻的调节阀减压控速机理研究[J].华中科技大学学报（自然科学版）,2023,51(12):52-59,8.基金项目
国家重点研发计划资助项目(2018YFB2004001) （2018YFB2004001）
国家自然科学基金资助项目(32101627) （32101627）
中央高校基本科研业务费专项资金资助项目(2662019QD023). （2662019QD023）
