大风量密闭阀门流阻性能数值分析  

Numerical analysis of flow resistance performance of sealed valve under high flow conditions

作　　者：王会杰 王泓 柴永生 齐泽昊 WANG Huijie;WANG Hong;CHAI Yongsheng;QI Zehao(Defense Engineering Institute,AMS,PLA,Beijing 100036,China)

机构地区：[1]军事科学院国防工程研究院,北京100036

出　　处：《防护工程》2024年第1期36-40,共5页Protective Engineering

摘　　要：为了研究DN2000大尺寸四连杆密闭蝶阀流动阻力性能,采用计算流体力学数值模拟方法,建立了阀门流阻测试系统数值模型,模拟了不同流速下的流体流动过程,分析了流场特征及阀门流阻特性。结果表明:阀门连杆机构、阀板等对流场扰动显著,是造成阀门局部压力损失的主要因素,过流式肋板对流场影响较小;阀门局部阻力随流速增加而增加,阀门流阻系数随流速增加而减小,当雷诺数较大时(Re>1.52×10^(6))流阻系数基本不变。In order to investigate the flow resistance performance of a DN2000 large-sized four-link sealed butterfly valve,computational fluid dynamics numerical simulation methods were employed.A numerical model of the valve flow resistance test system was established to simulate fluid flow processes under different velocities,analyze flow field characteristics,and examine valve flow resistance characteristics.The results indicate that the valve linkage mechanism and valve disc significantly disturb the flow field,serving as the main factors causing local pressure loss in the valve.In contrast,the impact of the through-flow rib plate on the flow field is relatively small.Local resistance in the valve increases with an increase in flow velocity,while the valve flow resistance coefficient decreases with an increase in flow velocity.When the Reynolds number is relatively large(Re>1.52×10^(6)),the flow resistance coefficient remains essentially unchanged.

关 键 词：连杆蝶阀 流阻系数 数值模拟 流场特征 

分 类 号：TH134[机械工程—机械制造及自动化]