Computer Simulation of Turbulent Flow through a Hydraulic Turbine Draft Tube  

作　　者：HU Ying CHENG Heming WANG Quanlong YU Zhikun 

机构地区：[1]School of Mechanical and Electrical Engineering, Kunming University of Science and Technology , Kunming 650093, Yunnan,China [2]School of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming 650093, Yunnan,China [3]Harbin Electric Machinery Corporation Limited, Harbin 150040,Heilongjiang, China

出　　处：《Wuhan University Journal of Natural Sciences》2006年第3期649-652,共4页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(10162002) ;the Key Project of Chinese Ministry Education (204138) ;the Sci-ence Foundation of Yunnan Education Bureau(5Y0020A)

摘　　要：Based on the Naviev-Stokes equations and the standard κ-ε turbulence model, this paper presents the derivation of the governing equations for the turbulent flow field in a draft tube. The mathematical model for the turbulent flow through a draft tube is set up when the boundary conditions, including the inlet boundary conditions, the outlet boundary conditions and the wall boundary conditions, have been implemented. The governing equations are formulated in a discrete form on a staggered grid system by the finite volume method. The second-order central difference approximation and hybrid scheme are used for discretization. The computation and analysis on internal flow through a draft tube have been carried out by using the simplee algorithm and cfx-tasc flow software so as to obtain the simulated flow fields. The calculation results at the design operating condition for the draft tube are presented in this paper. Thereby, an effective method for simulating the internal flow field in a draft tube has been explored.Based on the Naviev-Stokes equations and the standard κ-ε turbulence model, this paper presents the derivation of the governing equations for the turbulent flow field in a draft tube. The mathematical model for the turbulent flow through a draft tube is set up when the boundary conditions, including the inlet boundary conditions, the outlet boundary conditions and the wall boundary conditions, have been implemented. The governing equations are formulated in a discrete form on a staggered grid system by the finite volume method. The second-order central difference approximation and hybrid scheme are used for discretization. The computation and analysis on internal flow through a draft tube have been carried out by using the simplee algorithm and cfx-tasc flow software so as to obtain the simulated flow fields. The calculation results at the design operating condition for the draft tube are presented in this paper. Thereby, an effective method for simulating the internal flow field in a draft tube has been explored.

关 键 词：hydraulic turbine draft tube turbulent flow numerical simulation 

分 类 号：TK730.2[交通运输工程—轮机工程]