The aerodynamics of a cylinder submerged in the wake of another

被引：117

作者：

Alam, Md. Mahbub ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Inst Turbulence Noise Vibrat Interact & Control, Shenzhen, Peoples R China

[2] Harbin Inst Technol, Shenzhen Grad Sch, Key Lab Adv Mfg & Technol, Shenzhen, Peoples R China

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 2014年 / 51卷

关键词：

Fluctuating forces; Strouhal number; Aerodynamics; Flow structures; Bistable flow; Tandem cylinders; 2; CIRCULAR-CYLINDERS; TANDEM ARRANGEMENT; REYNOLDS-NUMBER; CROSS-FLOW;

D O I：

10.1016/j.jfluidstructs.2014.08.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Flow-induced fluctuating lift (C-Lf) and drag (C-Df) forces and Strouhal numbers (St) of a cylinder submerged in the wake of another cylinder are investigated experimentally for Reynolds number (Re)=9.7 x 10(3)-6.5 x 10(4). The spacing ratio L* (=L/D) between the cylinders is varied from 1.1 to 4.5, where L is the spacing between the cylinders and D is the cylinder diameter. The results show that C-Lf,C- C-Df and St are highly sensitive to Re due to change in the inherent nature of the flow structure. How the flow structure is dependent on Re and L* is presented in a flow structure map. Zdravkovich and Pridden (1977) observed a 'kink' in time-mean drag distribution at L* approximate to 2.5 for Re > 3.1 x 10(4), but not for Re <= 3.1 x 10(4). The physics is provided here behind the presence and absence of the 'kink' that was left unexplained since then. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：393 / 400

页数：8

共 19 条

[1] Global aerodynamic instability of twin cylinders in cross flow [J].

Alam, Md. Mahbub ;

Meyer, J. P. .

JOURNAL OF FLUIDS AND STRUCTURES, 2013, 41 :135-145

[2] Two interacting cylinders in cross flow [J].

Alam, Md. Mahbub ;

Meyer, J. P. .

PHYSICAL REVIEW E, 2011, 84 (05)

[3] Determination of flow configurations and fluid forces acting on two staggered circular cylinders of equal diameter in cross-flow [J].

Alam, MM ;

Sakamoto, H ;

Zhou, Y .

JOURNAL OF FLUIDS AND STRUCTURES, 2005, 21 (04) :363-394

[4] Investigation of Strouhal frequencies of two staggered bluff bodies and detection of multistable flow by wavelets [J].

Alam, MM ;

Sakamoto, H .

JOURNAL OF FLUIDS AND STRUCTURES, 2005, 20 (03) :425-449

[5] Fluctuating fluid forces acting on two circular cylinders in a tandem arrangement at a subcritical Reynolds number [J].

Alam, MM ;

Moriya, M ;

Takai, K ;

Sakamoto, H .

JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 2003, 91 (1-2) :139-154

[6] Suppression of fluid forces acting on two square prisms in a tandem arrangement by passive control of flow [J].

Alam, MM ;

Moriya, M ;

Takai, K ;

Sakamoto, H .

JOURNAL OF FLUIDS AND STRUCTURES, 2002, 16 (08) :1073-1086

[7]

Biermann D., 1933, 468 NAT ADV COMM AE

[8] Secondary instabilities in the flow around two circular cylinders in tandem [J].

Carmo, Bruno S. ;

Meneghini, Julio R. ;

Sherwin, Spencer J. .

JOURNAL OF FLUID MECHANICS, 2010, 644 :395-431

[9] CHARACTERISTICS OF THE FLOW AROUND TWO CIRCULAR CYLINDERS ARRANGED IN TANDEM - (2nd REPORT, UNIQUE PHENOMENON AT SMALL SPACING). [J].

Igarashi, Tamotsu .

Bulletin of the JSME, 1984, 27 (233) :2380-2387

[10] Flow-induced vibration of two circular cylinders in tandem arrangement. Part 2: Suppression of vibrations [J].

Kim, Sangil ;

Alam, Md Mahbub ;

Sakamoto, Hiroshi ;

Zhou, Yu .

JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 2009, 97 (5-6) :312-319

← 1 2 →