摘要
为解决大口径三偏心蝶阀在工程应用中遇到的阀板停滞、无法继续打开的问题,使用CFD方法,对三偏心蝶阀各个开度进行了数值仿真,得到了完整的可视化流场信息。通过截取流体区域中截面上的速度与压力分布云图,直观地展现了不同开度下流场的变化趋势。通过分析阀板承受的流体冲击力和压力的变化特征,归纳了动水力矩的发展趋势和成因。通过后处理读取流场数据,得到了动水力矩大小随三偏心蝶阀开度的变化关系。通过对比蝶阀阻力矩与执行机构输出力矩曲线,分析了问题发生的原因,并给出了合理的建议。研究结果表明,CFD方法对于三偏心蝶阀动水力矩的准确求解行之有效,也为执行机构的选型搭配提供了参考依据。
In order to solve the problem of the disc of large diameter triple-eccentric butterfly valve stagnation and unable to continue to open in engineering application.The complete visual flow field information obtained by the way of numerical simulating to each opening of the butterfly valve to witch the computational fluid dynamics method used.By intercepting the velocity and pressure distribution contours on the middle section of the fluid region,the variation trend of the flow field with different opening disclosed intuitively.By analyzing the changing characteristics of fluid impact force and pressure under the disc,the discovery trend and cause of hydrodynamic torque were summarized.By reading the flow field data through post processing,we obtained the relationship between hydrodynamic torque and opening.By comparing the resistance torque of butterfly valve with output torque of actuator,the causes of the problems were analyzed and reasonable suggestions were given.The results indicated that computational fluid dynamics method was effective for the accurate calculation of the hydrodynamic torque of the triple-eccentric butterfly valve,while there provided reference to the selection and collocation of the butterfly valve and actuator.
作者
徐宇平
赵宝
张伟
许自强
胡得力
XU Yu-ping;ZHAO Bao;ZHANG Wei;XU Zi-qiang;HU De-li(KOSO Control Engineering(Wuxi)Co.,Ltd.,Wuxi 214072,Jiangsu,China)
出处
《阀门》
2023年第6期669-674,共6页
VALVE MAGAZINE
关键词
大口径三偏心蝶阀
动水力矩
CFD方法
数值仿真
large diameter triple-eccentric butterfly valve
hydrodynamic torque
computational fluid dynamics method
numerical simulation
