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Applied Mathematics and Mechanics (English Edition) ›› 2003, Vol. 24 ›› Issue (7): 791-800.

• 论文 • 上一篇    下一篇

THREE-DIMENSIONAL INSTABILITY OF AN OSCILLATING VISCOUS FLOW PAST A CIRCULAR CYLINDER

陆夕云1,2, 凌国灿2   

  1. 1. Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026, P.R.China;
    2. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P.R.China
  • 收稿日期:2002-01-27 修回日期:2002-03-18 出版日期:2003-07-18 发布日期:2003-07-18
  • 通讯作者: DAI Shi-qiang
  • 基金资助:
    the National Science Fund for Distinguished Scholars (10125210);the Program of Hundred Talents of CAS;the Program of the Trsns-Century Outstanding Young Tranining of MOE;Innovation Research Project of CAS (KJCX-SW-L04)

THREE-DIMENSIONAL INSTABILITY OF AN OSCILLATING VISCOUS FLOW PAST A CIRCULAR CYLINDER

LU Xi-yun1,2, LING Guo-can 2   

  1. 1. Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026, P.R.China;
    2. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P.R.China
  • Received:2002-01-27 Revised:2002-03-18 Online:2003-07-18 Published:2003-07-18
  • Supported by:
    the National Science Fund for Distinguished Scholars (10125210);the Program of Hundred Talents of CAS;the Program of the Trsns-Century Outstanding Young Tranining of MOE;Innovation Research Project of CAS (KJCX-SW-L04)

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摘要： 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 two- to 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.

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 two- to 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.

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