中国舰船研究2018，Vol.13Issue(2)：27-34,8.DOI:10.3969/j.issn.1673-3185.2018.02.004
三维有限长圆柱绕流数值模拟
Numerical Simulation of three-dimensional flow around a circular cylinder of finite length
王晓聪 1桂洪斌 1刘洋1
作者信息
- 1. 哈尔滨工业大学(威海)船舶与海洋工程学院,山东威海264209
- 折叠
摘要
Abstract
[Objectives]In this paper,in order to study the flow characteristics and mechanism of three-dimensional flow around a circular cylinder of finite length,[Methods]a numerical simulation using a Large Eddy Simulation(LES)and vortex structural classification technology is carried out,and the accuracy of the simulation is proven.[Results]When analyzing the flow field,it is found that the length of the recirculation zone is smaller for a circular cylinder of finite length. In addition,the downstream from the free end can suppress the common phenomenon of Karman-Vortex-Street which leads to a loss of drag-coefficient. Compared with the fixed wall at the bottom,the free end surface has a higher influence on the onstream-wise velocity. The'mushroom' vortex appears in pairs and two original points exist on the free end.The circular cylinder of finite length appears to be strongly three-dimensional with a lower drag-coefficient.Moreover,there is a tip vortex behind the free end and a horseshoe vortex in the cylinder-wall junction.[Conclusions]The results of this paper give a relatively comprehensive description of the flow characteristics of a circular cylinder of finite length,and can provide useful references for relevant research.关键词
有限长/圆柱绕流/下洗/自由端/大涡模拟Key words
finite length/flow around circular cylinder/downstream/free end surface/Large Eddy Simulation(LES)分类
交通工程引用本文复制引用
王晓聪,桂洪斌,刘洋..三维有限长圆柱绕流数值模拟[J].中国舰船研究,2018,13(2):27-34,8.
