Self-Suction and Self-Jet Control on Wind Loads and Turbulent Flow Structures over a Circular Cylinder

Chen, Wen-Li1,2; Wang, Xiang-Jun1,2,4,5; Gao, Dong-Lai1,2,3

2019-01

10.1061/(ASCE)AS.1943-5525.0000965

JOURNAL OF AEROSPACE ENGINEERING   影响因子和分区

0893-1321

1943-5525

An experimental study on a passive, self-suction, and self-jet control method was conducted to manipulate the flow around a circular cylinder at the Reynolds number R approximate to 5.0x104. The influence of the spacing of the passive bypass jet rings on the aerodynamic forces and flow structures was investigated in detail. The results indicate that the aerodynamic forces acting on the cylinder increase with distance from the jet rings until reaching a critical distance. The critical spacing ratio, S/D, is approximately 2.69 for the convex surface case (Case 1) and S/D=5.00 for the plane surface case (Case 2). Compared to a bare cylinder, the fluctuations of the lift coefficient and mean drag coefficient are reduced by approximately 94.61% and 33.18%, respectively, when S/D=0.38 (the most effective case) due to the stable wake and reduction of the dissipation of turbulent kinetic energy in the near wake, as well as the extra energy input by the flow from the outlet holes.

Cylinder Passive jet control Aerodynamic coefficient Wake Particle image velocimetry

SCI ; EI

英语

其他

Fundamental Research Funds for the Central Universities[HIT. BRETIII. 201512] ; Fundamental Research Funds for the Central Universities[HITBRETIV. 201803]

Engineering

Engineering, Aerospace ; Engineering, Civil

WOS:000450399800026

ASCE-AMER SOC CIVIL ENGINEERS

ENGINEERING

Web of Science

1.Harbin Inst Technol, Minist Ind & Informat Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disast, Harbin 150090, Heilongjiang, Peoples R China
2.Harbin Inst Technol, Key Lab Struct Dynam Behav & Control Minist, Harbin 150090, Heilongjiang, Peoples R China
3.73 Huanghe Rd, Harbin 150090, Heilongjiang, Peoples R China
4.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
5.1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Chen, Wen-Li,Wang, Xiang-Jun,Gao, Dong-Lai. Self-Suction and Self-Jet Control on Wind Loads and Turbulent Flow Structures over a Circular Cylinder[J]. JOURNAL OF AEROSPACE ENGINEERING,2019,32(1).

Chen, Wen-Li,Wang, Xiang-Jun,&Gao, Dong-Lai.(2019).Self-Suction and Self-Jet Control on Wind Loads and Turbulent Flow Structures over a Circular Cylinder.JOURNAL OF AEROSPACE ENGINEERING,32(1).

Chen, Wen-Li,et al."Self-Suction and Self-Jet Control on Wind Loads and Turbulent Flow Structures over a Circular Cylinder".JOURNAL OF AEROSPACE ENGINEERING 32.1(2019).