THREE-DIMENSIONAL TURBULENCE NUMERICAL SIMULATION OF A STEPPED SPILLWAY OVERFLOW  

作　　者：CHENQun DAIGuang-qing ZHUFen-qing YANGQing 

机构地区：[1]CollegeofHydraulicandHydroelectricEngineering,SichuanUniversity,Chengdu610065,China [2]StateKeyHydraulicsLaboratoryofHighSpeedFlows,SichuanUniversity,Chengdu610065,China [3]GeotechnicEngineeringCo.,theSecondSurveyandDesignInstituteofRailway,Chengdu610031,China

出　　处：《Journal of Hydrodynamics》2004年第1期74-79,共6页水动力学研究与进展B辑（英文版）

基　　金：theNationalNaturalScienceFoundationofChina.(GrantNo :5 98790 13)

摘　　要：In this paper, the k-ε two-equation turbulence model was used to simulatethe three-dimensional turbulent flow of the stepped spillway at the Yubeishan reservoir. In order tosolve the curved free water surface and to handle the complex boundary conditions, the fractionalVolume Of Fluid (VOF) model that is applicable to the solution of the stratified two-phase flow wasintorduced to the k-ε turbulence model and the unstructured grid was used for the discretization ofthe irregular simulation domain. By these methods, the turbulent flow field of the stepped spillwaywas simulated successfully. The location of the free surface along the spillway, the magnitude anddistribution of the velocity, the pressure distribution on the step surface, the turbulence kineticenergy and turbulence dissipation rate were obtained by simulation. The changes and distributions ofthese characteristics along the width of the spillway were also obtained. The energy dissipationratio of the stepped spillway was calculated according to the upstream and downstream water depthand velocities.In this paper, the k-ε two-equation turbulence model was used to simulatethe three-dimensional turbulent flow of the stepped spillway at the Yubeishan reservoir. In order tosolve the curved free water surface and to handle the complex boundary conditions, the fractionalVolume Of Fluid (VOF) model that is applicable to the solution of the stratified two-phase flow wasintorduced to the k-ε turbulence model and the unstructured grid was used for the discretization ofthe irregular simulation domain. By these methods, the turbulent flow field of the stepped spillwaywas simulated successfully. The location of the free surface along the spillway, the magnitude anddistribution of the velocity, the pressure distribution on the step surface, the turbulence kineticenergy and turbulence dissipation rate were obtained by simulation. The changes and distributions ofthese characteristics along the width of the spillway were also obtained. The energy dissipationratio of the stepped spillway was calculated according to the upstream and downstream water depthand velocities.

关 键 词：stepped spillway turbulence numerical simulation turbulence model VOFmodel 

分 类 号：TV135.2[水利工程—水力学及河流动力学]