基于SMAC方法的90°弯管内部流场数值模拟  

Numerical simulation of interior flow field in 90° curved duct based on SMAC method

作　　者：桂绍波[1] 曹树良[1] 

机构地区：[1]清华大学热能工程系,水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《江苏大学学报（自然科学版）》2008年第6期507-511,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50776052);北京市科委2006年度科技计划重大项目(D0606005040411)

摘　　要：基于SMAC(simplified marker and cell)方法和交错网格技术,发展了一套在贴体坐标系下求解三维不可压缩流动的数值算法,并应用该方法求解以逆变速度和压力为未知变量的Navier-Stokes方程,对弯曲度为2.3的三维90°方形截面弯管内部不可压缩流场进行了数值模拟.结果表明:文中提出的SMAC方法对强曲率弯管内流有较强的预测能力,能够较准确地模拟其主流和两次流的运动规律,从而证明了本算法的可靠性和有效性.Based on the SMAC method and staggered-mesh technology, a numerical algorithm used for simulating incompressible flow was developed in the body-fitted curvilinear coordinate. The Navier-Stokes equation was solved with contravariant velocities and pressure as unknown variables for the interior incom- pressible flow of the three dimensional 90°curved duct of square cross-section with radius Rr = 2.3. The results indicate that the SMAC method has strong forecasting ability to the flow of duct with strong curvature, and can accurately simulate the mainstream and secondary flow. So the validity and reliability of the present algorithm are proved.

关 键 词：SMAC方法 TVD格式 弯曲管道 两次流 

分 类 号：TV675[水利工程—水利水电工程]