Abstract:The three dimensional numerical simulation was applied for inner flow field of the double eccentric butterfly valve by the semiimplicit method for pressure linked equation SIMPLEC and the k-ε turbulence model based on the theory of isotropic eddy viscosity. The overall performance was predicted, and the curves of characteristics of inherent flow, regulation were also obtained. The study has important theoretical significance and a wide range value of production and application for inner flow optimization and grasping the regulation ability and macro features of the valves. According to the numerical results, the performance of flow in trusstype butterfly valve is optimal when valve is full open. The dynamic characteristics and reverse selfsealing ability of double eccentric is improved and made both its regulation characteristics and service life better. By the comparison, the performance and characteristic of four kinds of butterfly valves can be obtained, which can provide a reference for butterfly valve design and selection.
[1]俞金龙.调节阀的气蚀及防护[J].阀门,2002,31(4):36-38.Yu Jinlong.Cavitations of regulation valve and its prevention[J].Valve,2002,31(4):36-38.(in Chinese)[2]金莉.控制阀的气蚀与闪蒸[J].石油化工自动化,2006,43(2):97-98.Jin Li.Cavitations of control valve and its flash[J].Automation in Petrochemical Industry,2006,43(2):97-98.(in Chinese)[3]诸葛伟林,刘光临,蒋劲,等.蝶阀三维分离流动的数值模拟研究[J].流体机械,2003,31(6):14-16.Zhuge Weilin,Liu Guanglin,Jiang Jin,et al.Numerical inbestigation on 3-D separate flow of butterfly valve[J].Fluid Machinery,2003,31(6):14-16.(in Chinese)[4]陆林广,刘军,梁金栋,等.大型泵站出水流道三维流动及水力损失数值计算[J].排灌机械,2008,26(3):51-54.Lu Linguang,Liu Jun,Liang Jindong,et al.Numerical simulation of 3D turbulent flow and hydraulic loss in outlet conduit of large pumping station[J].Drainage and Irrigation Machinery,2008,26(3):51-54.(in Chinese)[5]冯卫民,肖光宇,宋立.偏心球阀流场的数值模拟及性能预测[J].排灌机械,2008,26(4):8-13.Feng Weimin,Xiao Guangyu,Song Li.Numerical simulation of flow and performance prediction of eccentric ball valve[J].Drainage and Irrigation Machinery,2008,26(4):8-13.(in Chinese)[6]Danbon F,Solliec C.Aerodynamic torque of a butterfly valveinfluence of an elbow on the time-mean and instantaneous aerodynamic torque[J].Journal of Fluids Engineering,2000,122(2):337-344.[7]Caille V,Laumonier J.Effect of periodic aerodynamic pulsation on flow over a butterfly valve[J].Experiments in Fluids,1998,25(4):362-368.[8]Zachary Leutwyler,Charles Dalton.A CFD study of the flow field,resultant force,and aerodynamic torque on a symmetric disk butterfly valve in a compressible fluid[J].Journal of Pressure Vessel Technology,2008,130(2):021302.1-021302.10.[9]Park Youngchul,Song Xueguan.Numerical analysis of large diameter butterfly valve[J].Advances in Computational Algorithms and Data Analysis,2008,14:349-363.[10]Choi Young chan,Li Xiangyang,Park T J,et al.Numerical analysis of the flow field inside an entrained-flow gasifier[J].Korean J Chem Eng,2001,18(3):376-381.