Rigid cylinder with asymmetric roughness in Flow Induced Vibrations

OCEAN ENGINEERING

卷:150

Article

Zhang, Dahai^1,2  Sun, Hai^2,3  Wang, Wenhao¹  Bernitsas, Michael M.^2,4,5 

[1] China Univ Petr East China, Coll Chem Engn, Qingdao 266580, Shandong, Peoples R China

[2] Univ Michigan, Marine Renewable Energy Lab, Dept Naval Architecture & Marine Engn, 2600 Draper Rd, Ann Arbor, MI 48109 USA

[3] Harbin Engn Univ, Coll Aerosp & Civil Engn, 154 Nantong Ave, Harbin 150001, Heilongjiang, Peoples R China

[4] Dept Naval Architecture & Marine Engn, Dept Mech Engn, Ann Arbor, MI USA

[5] Vortex Hydro Energy, Ann Arbor, MI USA

关键词: VIV;    Galloping;    Asymmetric turbulence stimulation;    Selective surface roughness;    Variable location of turbulence stimulation;    2D-URANS;   

DOI  :  10.1016/j.oceaneng.2018.01.005

来源: Elsevier

【 摘 要 】

Flow Induced Vibrations (FIV) of a single, rigid, circular cylinder with one-sided PTC (passive turbulence control) are investigated experimentally and numerically for Reynolds number 30,000 <= Re <= 110,000. Comparisons of response are made between symmetric and one-sided PTC-cylinder. For the one-sided configuration, different PTC location angles for the one-sided configuration are applied to initiate the asymmetrical FIV, which is studied in detail. A user-defined function, combined with dynamic-mesh is established in a commercial solver. At different flow speeds in the vortex induced vibration (VIV) and galloping ranges, flow-field details and displacement time history at selected positions of the cylinder are presented and discussed. Conclusions of the asymmetrical oscillation and the effect of selective roughness are drawn with respect to the flow speed, damping ratios and the PTC locations angle at the end.

【 授权许可】

Free