| 双圆柱绕流特性的模拟研究 |
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| 引用本文： | 刘向军,张健,林超.双圆柱绕流特性的模拟研究[J].力学学报,2009,41(3):300. |
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| 作者姓名： | 刘向军 张健 林超 |
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| 作者单位： | 北京科技大学热能工程系 北京科技大学热能工程系 北京科技大学热能工程系 |
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| 基金项目： | 国家自然科学基金资助项目(50406025)~~ |
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| 摘 要： | 采用格子Boltzmann方法对低雷诺数下气体绕流圆柱的规律进行了研究. 对比计算了双
圆柱在不同圆心距、不同Re数、不同来流速度与双圆柱圆心连线角度的情况下，各个圆柱的
受力大小和曳力系数. 结果表明，若Re数为20, 改变圆柱间距，圆柱间距在1.2d和1.4d
之间时，下游圆柱所受曳力有极小值；双圆柱间距为1.6d时，双圆柱受到总曳力最小；圆
柱间距大于2d时，上游颗粒受到的曳力不再受到下游颗粒的影响. 若圆柱间距
为1.2d, 改变雷诺数，Re数在30和40之间，下游圆柱所受曳力有极小值. 另外，
来流速度角度对圆柱的受力影响很大. 上述规律为低Re数下圆柱绕流的深入研究
与应用打下基础.
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| 关 键 词： | 双圆柱 绕流特性 格子Boltzmann方法 曳力系数 模拟研究 |
| 收稿时间： | 2007-10-10 |
| 修稿时间： | 2009-01-04 |
A NUMERICAL STUDY ON RESISTANCE CHARACTERISTICS OF FLOW AROUND TWO CYLINDERS |
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| Liu Xiangjun
,
Zhang Jian
,
Lin Chao.A NUMERICAL STUDY ON RESISTANCE CHARACTERISTICS OF FLOW AROUND TWO CYLINDERS[J].chinese journal of theoretical and applied mechanics,2009,41(3):300. |
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| Authors: | Liu Xiangjun Zhang Jian Lin Chao |
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| Affiliation: | 2;Thermal Science and Energy Engineering Department;University of Science and Technology Beijing;Beijing 100083;China |
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| Abstract: | Lattice Boltzmann models(LBM) is a recently developed method in computational fluid dynamics, and it is particularly suitable for flow modeling in complex boundary area.In this paper,the resistance characteristics of gas flow around two cylinders are numerically studied using LBM.The drag force and drag coefficient of each cylinder are studied by varying the cylinder distance,Reynold number,and the attack angle. Three typical scenarios are studies:The first scenario is to calculate 10 typical cases with the... |
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| Keywords: | two cylinders resistance characteristics lattice Boltzmann method drag coefficient numerical study |
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