On the distributed blowing control of flow around a square cylinder at a low Reynolds number

被引：6

作者：

Ran, Yize ^{[1
,2
]}

Chen, Wen-Li ^{[1
,2
]}

Cao, Yong ^{[3
]}

Li, Hui ^{[1
,2
]}

Gao, Donglai ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, Harbin 150090, Peoples R China

[2] Harbin Inst Technol, Minist Ind & Informat Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disaste, Harbin 150090, Peoples R China

[3] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

来源：

OCEAN ENGINEERING | 2023年 / 285卷

基金：

中国国家自然科学基金;

关键词：

Numerical simulation; Square cylinder; Steady blowing control; 3D flow pattern; Unsteady aerodynamic forces; Vortex shedding; WIND-INDUCED VIBRATIONS; CIRCULAR-CYLINDER; RECTANGULAR CYLINDERS; NUMERICAL-SIMULATION; VORTEX; PLATE;

D O I：

10.1016/j.oceaneng.2023.115240

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

This paper numerically investigates the distributed blowing control of the flow around a square cylinder at a low Reynolds number of Re = 200. The air holes are placed at the windward or leeward stagnation points. The control effect of the unsteady aerodynamic forces is notably different with different spanwise distributions of air holes, which is represented by the dimensionless air hole area ratio G. The simulation results indicate that the windward blowing control (WBC) shows better control effect than the leeward blowing control (LBC) in reducing the time-averaged drag coefficient Cd of the square cylinder while the fluctuating lift coefficient C; can be significantly suppressed by the LBC. Besides, the surface pressure distribution, the turbulence kinetic energy (TKE) and Reynolds shear stress (RSS) distributions and the shedding vortices in the wake are analysed and compared in detail under different control conditions. Finally, through the instantaneous 3D vortex structures and the spanwise fluctuating velocity w & PRIME; distribution in the flow field, the suppression of the unsteady aerodynamic forces is mainly related to the 3D vortex pairs induced by the blowing jet.

引用

页数：19

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