| 斜、直圆柱绕流的CFD模拟 |
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| 引用本文： | 李寿英,顾明.斜、直圆柱绕流的CFD模拟[J].空气动力学学报,2005,23(2):222-227. |
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| 作者姓名： | 李寿英 顾明 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室,上海,200092;同济大学土木工程防灾国家重点实验室,上海,200092 |
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| 基金项目： | 国家创新研究群体科学基金，国家自然科学基金，上海市科委资助项目，教育部高校骨干教师资助计划 |
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| 摘 要： | 采用CFD软件CFX5.5对直圆柱和斜圆柱绕流进行数值模拟,计算了直、斜置圆柱的阻力系数、升力系数、周向平均压力系数及其脉动压力系数的均方根值,并与试验结果进行了比较.计算表明,斜圆柱绕流与直圆柱绕流有很大的差异:斜圆柱绕流的平均阻力系数减小,平均升力系数不等于零,升力系数的频域除包含有传统的卡门涡脱频率外,还包含有许多低频成份.
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| 关 键 词： | 斜、直圆柱绕流 CFD模拟 阻力系数 升力系数 压力系数 |
| 文章编号： | 0258-1825(2005)02-0222-06 |
Numerical simulation for flow around perpendicular and oblique circular cylinders |
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| LI Shou-ying,GU Ming.Numerical simulation for flow around perpendicular and oblique circular cylinders[J].Acta Aerodynamica Sinica,2005,23(2):222-227. |
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| Authors: | LI Shou-ying GU Ming |
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| Abstract: | A numerical simulation for flow around perpendicular and oblique circular cylinders is carried out using CFX5.5. The mean and RMS values of drag and lift and pressure coefficients are obtained and then compared with the experimental results from other literatures. The differences between the flow around perpendicular and oblique circular cylinders are investigated in detail. The mean drag coefficients of oblique circular cylinder are generally lower than those of the perpendicular one; and the mean lift coefficient of oblique circular cylinder is not equal to zero. From the power spectrum density functions of the fluctuating lift coefficients of the oblique circular cylinder it can be also found that the lift includes not only the frequency of the Karman vortex shedding but also many low frequency components. |
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| Keywords: | flow around perpendicular and oblique circular cylinders computational fluid dynamics drag coefficient lift coefficient pressure coefficient |
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