三维瞬态圆柱绕流数值模拟  

3D Transient Cylinder Flow Numerical Simulation

作　　者：闵强利[1] 张云海[1] 

机构地区：[1]中国船舶重工集团公司第七一○研究所,湖北宜昌443003

出　　处：《水雷战与舰船防护》2008年第1期11-16,62,共7页Mine warfare & Ship Self-Defence

摘　　要：采用Fluent软件数值模拟均匀来流绕固定圆柱的三维流动,模拟雷诺数Re=200和Re= 800圆柱尾部流动分离、涡街生成和脱落以及随时间推移尾涡区非定常的发展过程。整个计算过程在HP9300工作站上进行,采用并行计算。计算结果表明:在Re=200时,圆柱尾部有规则的涡街产生;在Re=800时,圆柱尾部涡街呈现出随机性和三维性的特征。计算结果与实验结果吻合较好。对于高雷诺数圆柱绕流问题,本文采用LES模型进行了初步尝试,结果表明可以较好地模拟出漩涡脱落的基本结构,为工程应用提供了依据。In this paper, uniform incident flow around a fixed cylinder is simulated using FLUENT software and simulation is conducted of flow separation at the cylinder tail end, vortex street formation and pull-out and the unsteady evolution of the wake flow with time progress at Re=200 and Re=800. The whole simulation is processed with parallel computation on HP9300 computer station. The results show that at Re=200, there are regular vortex streets generated at the tail end of the cylinder; at Re=800, the votex streets at the tail end present randomness and 3D characteristics. The computation results correspond to the experimental results. As to the problem of flow around cylinder at high Reynolds number, in this paper, with LES turbulence model for the first attempt, the results show that the basic structure of vortex streets pull-out can be well simulated, which provides reference for the engineering application.

关 键 词：圆柱绕流 雷诺数 数值模拟 FLUENT 

分 类 号：TJ610.1[兵器科学与技术—武器系统与运用工程]