圆柱振荡绕流的三维不稳定性研究

陆夕云; 凌国灿

圆柱振荡绕流的三维不稳定性研究

陆夕云^1,2,
凌国灿²

1.
中国科学技术大学力学和机械工程系, 合肥 230026;
2.
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

基金项目: 国家杰出青年科学基金资助项目(10125210);中国科学院"百人计划"资助项目;中国科学院知识创新工程资助项目(KJCX-SW-L04);教育部"跨世纪优秀人才培养计划"资助项目

详细信息

作者简介:
陆夕云(1963- ),教授,江苏人,系主任,博士(E-mail:xlu@ustc.edu.cn).

中图分类号: O351
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- 被引次数: 0
出版历程
- 收稿日期: 2002-01-27
- 修回日期: 2003-03-18
- 刊出日期: 2003-07-15

Three-Dimensional Instability of an Oscillating Viscous Flow Past a Circular Cylinder

LU Xi-yun^1,2,
LING Guo-can²

1.
Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026, P. R. China;
2.
Stateof Sciences, Beijing 100080, P. R. China

摘要

摘要: 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,振荡流动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.
- Navier-Stokes方程 /
- Reynolds数 /
- Keulegan-Carpenter数 /
- Morison方程
Abstract: A systematically numerical study of the sinusoidally oscillating viscous flow around a circular cylinder was performed to investigate vortical instability by solving the three-dimensional incompressible Navier-Stokes equations.The transition from twoto three-dimensional flow structures along the axial direction due to the vortical instability appears,and the three-dimensional structures lie alternatively 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 theoretical prediction.
- Navier-Stokes equation /
- Reynolds number /
- Keulegan-Carpenter number /
- Morison equation

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参考文献(11)

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