高精度文氏管调节阀流量特性仿真及试验  

Simulation and Experimental on High-precision Venturi Regulator Flow Characteristics

作　　者：孟令秀[1] 张睿超 高杰浩 高隆隆[2] MENG Lingxiu;ZHANG Ruichao;GAO Jiehao;GAO Longlong(Beijing Power Machinery Research Institute,Beijing 100074;FESTO Pneumatics Centre,School of Mechanical Science&Engineering,Huazhong University of Science&Technology,Wuhan,Hubei 430074)

机构地区：[1]北京动力机械研究所,北京100074 [2]华中科技大学机械科学与工程学院FESTO气动中心,湖北武汉430074

出　　处：《液压与气动》2024年第8期146-153,共8页Chinese Hydraulics & Pneumatics

摘　　要：文氏管调节阀作为流量控制系统的核心组件,其流量特性对系统控制精度及稳定性具有决定性影响。研究了文氏管调节阀的流量特性,采用包络线法对阀芯型面进行了优化设计,并对优化设计结果进行了CFD仿真分析和试验验证。结果表明:抛物面型阀芯可实现调节阀通流面积与阀芯位移之间的线性变化;在出入口压比为0.5的工况下,CFD仿真模拟和调节阀水介质流量特性试验均验证了调节阀位移-流量曲线具有极高线性度,进一步说明了抛物面型阀芯设计准确有效。同时,通过可视化试验图像可知,由于空化流动状态发生改变,调节阀阀芯位移较小时流量系数曲线会出现剧烈波动。As a core component of the flow control system,the Venturi regulator has a decisive impact on the system's control accuracy and stability.The flow characteristics of the Venturi regulator were investigated.The envelope method was used to optimize the design of the spool contour.The design was validated through CFD simulation and experiment.The results indicate that the paraboloid-shaped spool can achieve a linear variation between the flow area of the regulator and the spool displacement.Under the operating condition with an inlet-to-outlet pressure ratio of 0.5,both the CFD simulation and the water-medium flow characteristic experiment of the regulator have validated the high linearity of the displacement-flow curve.These results further demonstrate the accuracy and effectiveness of the paraboloid-shaped spool design.Simultaneously,in conjunction with the visualization experiment figures,the significant fluctuations in the flow coefficient curve when the spool displacement is relatively small are due to the change in cavitation flow status.

关 键 词：文氏管调节阀 仿真模拟 空化流动 流量特性 可视化试验 

分 类 号：TH137[机械工程—机械制造及自动化] TH134