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

作　　者：陆夕云 凌国灿 

机构地区：[1]Department of Mechanics and Mechanical Engineering,University of Science and Technology of China,Hefei 230026,P.R.China,State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,P.R.China [2]State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences

出　　处：《Applied Mathematics and Mechanics(English Edition)》2003年第7期791-800,共10页应用数学和力学（英文版）

基　　金：theNationalScienceFundforDistinguishedScholars(10125210);theProgramofHundredTalentsofCAS;theProgramoftheTrsns_CenturyOutstandingYoungTraniningofMOE;InnovationResearchProjectofCAS (KJCX_SW_L0 4)

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.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.

关 键 词：Navier_Stokes equation Reynolds number Keulegan_Carpenter number Morison equation 

分 类 号：O357[理学—流体力学] O411.1[理学—力学]