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圆柱振荡绕流的三维不稳定性研究
Three-Dimensional Instability of an Oscillating Viscous Flow Past a Circular Cylinder
查看参考文献11篇
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文摘
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通过数值求解三维不可压缩Navier-Stokes方程，研究了振荡圆柱绕流的旋涡不稳定性。研究表明，在一定的参数范围内，由于旋涡不稳定性，振荡流出由二维演化成三维流动，并沿圆柱轴向形成交错排列的三维涡结构。数值计算合理地预测了三维涡结构的空间失稳波长，并与实验测试值相符很好。文中还进一步研究了圆柱的受力特性，通过求解Morison方程，计算了圆柱的阻力和惯性力特性，其计算结果与已有的实验数据相吻合。 |
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其他语种文摘
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A systematically numerical study of the sinusoidally oscillating viscous flow around a circu-lar cylinder was performed to investigate vortical instability by solving the three-dimensional incom-pressible Navier-Stokes equations. The transition from two- to three-dimensional flow structures along the axial direction due to the vortical instability appears,and the three-dimensional structures lie alter-natively on the two sides of the cylinder. Numerical study has been taken for the Keulegan-Carpenter (KC) numbers from 1 to 3.2 and frequency parameters from 100 to 600. The force behaviors are also studied by solving the Morison equation. Calculated .results agree well with experimental data and the-oretical prediction. |
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来源
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应用数学和力学
,2003,24(7):699-707 【核心库】
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关键词
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Navier-Stokes方程
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Reynolds数
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Keulegan-Carpenter数
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Morison方程
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地址
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1.
中国科学技术大学力学和机械工程系, 合肥, 230026
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中国科学院力学研究所, 非线性力学国家重点实验室, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0887 |
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学科
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力学 |
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基金
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国家自然科学基金国家杰出青年科学基金
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中国科学院“百人计划”项目
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中国科学院知识创新工程项目
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国家教育部新世纪优秀人才支持计划
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文献收藏号
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CSCD:1168543
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11
共1页
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