基于CFX的大口径蝶阀的流场分析及结构优化  

Flow Field Analysis and Structure Optimization of Large Diameter Butterfly Valve Based on the CFX

作　　者：何庆中[1] 王渝皓 王佳[1] 蒲虎[1] 厉明玉 

机构地区：[1]四川理工学院,四川自贡643000

出　　处：《流体机械》2016年第5期42-46,共5页Fluid Machinery

基　　金：2014年自贡市重点科技计划项目(第二批)(2014JZ05);四川理工学院研究生创新基金项目(y2013012)

摘　　要：青海尕曲水电站大口径三偏心主控蝶阀在小开度工况下振动强烈,本文利用其二维图纸建立了蝶阀在不同开度下的流道模型,并利用CFX软件对其流场进行了数值模拟。数值分析结果表明：5%~30%开度区间内蝶阀下游的涡街现象强烈。同时,对蝶板结构进行了优化,优化前后分析结果对比表明：改进后蝶阀流场的涡街效应明显减弱,有效预防涡街共振的发生,为以后大型蝶阀的设计提供了参考。The large diameter butterfly valve used in Qinghai Naqu hydropower station was subjected to strong vibration when the opening was small. This paper established the flow model of butterfly valve for different opening degrees with the 2D drawings and simulated the flow field by using CFX software. The results of numerical analysis show that the vortex are the most strong in the range of 5% to 30%. Meanwhile,an improved structure was given and the results of numerical analysis show that the vortex effect decreased significantly for the new one. This new structure can effectively prevent the vortex resonance and give an example for the new design of a large butterfly valve.

关 键 词：蝶阀 CFX软件 涡街共振 结构优化 

分 类 号：TH138[机械工程—机械制造及自动化] TK7[动力工程及工程热物理—流体机械及工程]