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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

27卷

期数:

2010年04期

页码:

39-43

栏目:

出版日期:

2010-12-20

文章信息/Info

Title:

Numerical Simulation and Control Measures of Flow Around Circular Cylinders at Low Reynolds Number

作者:

白桦,李加武,夏勇

长安大学 公路学院,陕西 西安 710064

Author(s):

BAI Hua, LI Jia-wu, XIA Yong

School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

关键词:

雷诺数;  数值模拟;  圆柱绕流;  阻力系数;  升力系数

Keywords:

Reynolds number;  numerical simulation;  flow around cylinder;  drag coefficient;  lift coefficient

分类号:

TU317.1

DOI:

-

文献标志码:

A

摘要:

采用层流模型并结合合理的网格划分模拟了低雷诺数圆柱绕流,使用FLUENT软件模拟了圆柱表面涡脱的产生、发展变化过程; 计算了圆柱表面周向压力系数分布情况及圆柱的阻力系数、升力系数和Strouhal数; 为研究圆柱绕流的控制措施,引入不同导流板进行数值计算。分析结果表明:在圆柱尾部中轴线位置引入导流板可以很好地控制圆柱表面涡脱,减小阻力,抑制振动; 各系数计算结果与文献中的结果吻合很好,该方法具有较高的精度。

Abstract:

Flow around a circular cylinder for low Reynolds number was numerically simulated through the laminar model with the reasonable meshing division. The producing and development of the vortex shedding from the circular cylinder were simulated by using the software FLUENT. Distribution of surrounding pressure coefficient around circular cylinder surface and drag coefficient and lift coefficient, as well as Strouhal number were calculated. In order to study the control measures of the flow around circular cylinder, the numerical calculations of different baffles were carried out. Analysis results show that the vortex shedding of flow around circular cylinder can be well controlled by placing the baffle at the downstream medial axis of the circular cylinder, which can reduce drag and resist vibration; the calculated results of different coefficients agree well with other numerical results from the references. The method has a high accuracy.

参考文献/References:

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备注/Memo

备注/Memo:

收稿日期:2010-09-24
基金项目:国家自然科学基金项目(50578014)
作者简介:白 桦(1979-),男,甘肃西和人,工程师,工学博士研究生,E-mail:baihua15@163.com。

常用功能

更新日期/Last Update: 2010-12-20