Numerical prediction of inner turbulent flow in conical diffuser by using a new five-point scheme and DLR k-ε turbulence model

作     者：蒋光彪 何永森 舒适 肖映雄 

作者机构：College of Mathematics and Computational ScienceXiangtan University Hunan Key Laboratory for Computation and Simulation in Science and EngineeringXiangtan University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2008年第15卷第S1期

页      面：181-186页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Projects(59375211,10771178,10676031) supported by the National Natural Science Foundation of China Project(07A068) supported by the Key Project of Hunan Education Commission Project(2005CB321702) supported by the National Key Basic Research Program of China 

主　　题：conical diffuser turbulent flow DLR k-ε turbulence model 5-point scheme algebraic multigrid method(AMG) 

摘      要：The internal turbulent flow in conical diffuser is a very complicated adverse pressure gradient *** k-ε turbulence model was adopted to study *** every terms of the Laplace operator in DLR k-ε turbulence model and pressure Poisson equation were discretized by upwind difference scheme.A new full implicit difference scheme of 5-point was constructed by using finite volume method and finite difference method.A large sparse matrix with five diagonals was formed and was stored by three arrays of one dimension in a compressed *** iterative methods do not work wel1 with large sparse *** algebraic multigrid method(AMG),linear algebraic system of equations was solved and the precision was set at *** computation results were compared with the experimental *** results show that the computation results have a good agreement with the experiment *** precision of computational results and numerical simulation efficiency are greatly improved.