Numerical modeling of cavitation on spillway＇s flip bucket  

作　　者：Abbas PARSAIE Sadegh DEHDAR-BEHBAHANI Amir Hamzeh HAGHIABI 

机构地区：[1]Department of water Engineering, Lorestan University, Khorramabad, Iran [2]Hydro Structures, Shahid Chamran University, Ahvaz, Iran

出　　处：《Frontiers of Structural and Civil Engineering》2016年第4期438-444,共7页结构与土木工程前沿（英文版）

摘　　要：Numerical modeling of hydraulic phenomenon by computational fluid dynamic （CFD） approaches is one of the main parts in the high cost hydraulic structure studies. In this paper, using Flow 3D as CFD commercial tool, the cavitation phenomenon was assessed along spillway＇s flip bucket of the Balaroud dam. Performance of numerical modeling was compared to the physical model, which was constructed to this purpose. During numerical modeling, it was found that RNG turbulence model is a suitable performance for modeling the cavitation. Physical modeling shows that minimum cavitation index is about 0.85 and minimum cavitation index based on Flow 3D results is about 0.665, which was related to the flood discharge with return period of 10000 years. The main difference between numerical and physical modeling is related to the head of velocity, which is considered in physical modeling. Results of numerical simulation show that occurrence of cavitation based on cavitation index equal to 0.25 is not possible along the spillway.Numerical modeling of hydraulic phenomenon by computational fluid dynamic （CFD） approaches is one of the main parts in the high cost hydraulic structure studies. In this paper, using Flow 3D as CFD commercial tool, the cavitation phenomenon was assessed along spillway＇s flip bucket of the Balaroud dam. Performance of numerical modeling was compared to the physical model, which was constructed to this purpose. During numerical modeling, it was found that RNG turbulence model is a suitable performance for modeling the cavitation. Physical modeling shows that minimum cavitation index is about 0.85 and minimum cavitation index based on Flow 3D results is about 0.665, which was related to the flood discharge with return period of 10000 years. The main difference between numerical and physical modeling is related to the head of velocity, which is considered in physical modeling. Results of numerical simulation show that occurrence of cavitation based on cavitation index equal to 0.25 is not possible along the spillway.

关 键 词：cavitation Index numerical simulation spillway＇s flip Bucket CFD Balaroud Dam physical modeling 

分 类 号：TV651.1[水利工程—水利水电工程] TQ440.5[化学工程—化学肥料工业]