轴流叶轮机三维粘性非定常流动计算的双时间方法  

DUAL TIME-STEPPING FOR COMPUATION OF 3D UNSTEADY VISCOUS FLOW THROUGH AXIAL FLOW TURBOMACHINERY

作　　者：刘前智[1] 周新海[1] 胡运聪[1] 

机构地区：[1]西北工业大学七系,陕西西安710072

出　　处：《工程热物理学报》2001年第S1期21-24,共4页Journal of Engineering Thermophysics

基　　金：航空科学基金资助项目(No.97C53027)

摘　　要：采用双时间方法研究了单级跨音速压气机的三维非定常粘性流场计算问题，以ＬＵ－ＳＧＳ隐式解法快速获得虚拟时间域的定常解。对某跨音速单级压气机同时进行了双时间方法和显式方法的非定常流数值计算，双时间法与ＬＵ－ＳＧＳ隐式解法相结合的非定常粘流计算模式可以显著地节省计算时间。The application of dual time-step approach for the computation of three-dimensional unsteady viscous flow through a transonic compressor stage is presented. Convergence of inner pseudotime iteration is improved by using LU--SGS implicit scheme. Calculations of unsteady flow through a compressor stage were performed with implicit dual time-step and explicit algorithms. Dual timestep approach in conjunction with LU-SGS implicit method offers significant savings in CPU time for unsteady viscous flow computat...

关 键 词：非定常流动 数值模拟 叶轮机械 

分 类 号：O357[理学—流体力学]