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Research Papers: Fluid-Structure Interaction

Forces Exerted on a Cylinder in Near-Axial Flow

[+] Author and Article Information
Lise Divaret

Laboratoire de Mécanique,
des Structures Industrielles,
Durables (LaMSID),
UMR EDF/CNRS/CEA 8193,
1, Avenue du General de Gaulle,
Clamart 92141, France
e-mail: lise.divaret@edf.fr

Pierre Moussou

Laboratoire de Mécanique,
des Structures Industrielles,
Durables (LaMSID),
UMR EDF/CNRS/CEA 8193,
1, Avenue du General de Gaulle,
Clamart 92141, France
e-mail: pierre.moussou@edf.fr

Julien Berland

Laboratoire de Mécanique,
des Structures Industrielles,
Durables (LaMSID),
UMR EDF/CNRS/CEA 8193,
1, Avenue du General de Gaulle,
Clamart 92141, France
e-mail: julien-j.berland@edf.fr

Hassan Berro

Laboratoire de Mécanique,
des Structures Industrielles,
Durables (LaMSID),
UMR EDF/CNRS/CEA 8193,
1, Avenue du General de Gaulle,
Clamart 92141, France
e-mail: hassan.berro@edf.fr

Olivier Cadot

Unité de Mécanique (UME),
ENSTA ParisTech,
Chemin de la Hunière,
Palaiseau 91761, France
e-mail: olivier.cadot@ensta-paristech.fr

Olivier Doaré

Unité de Mécanique (UME),
ENSTA ParisTech,
Chemin de la Hunière,
Palaiseau 91761, France
e-mail: olivier.doare@ensta-paristech.fr

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received September 11, 2013; final manuscript received January 22, 2014; published online August 19, 2014. Assoc. Editor: Samir Ziada.

J. Pressure Vessel Technol 136(5), 051306 (Aug 19, 2014) (6 pages) Paper No: PVT-13-1157; doi: 10.1115/1.4026567 History: Received September 11, 2013; Revised January 22, 2014

This study investigates the flow around a cylinder in a near-axial flow at a Reynolds number of 27,000. Both computational fluid dynamics (CFD) calculations and experiments are performed. Time-mean values of lift force coefficient are investigated against the inclination of the cylinder in the domain of low inclinations (<15 deg). A pressure distribution and flow profiles are also measured and extracted from the CFD calculation results for a characteristic inclination α = 5 deg. Numerical results for force and pressure show fair agreement with experiments for inclination below 5 deg and reveal that at low angles, the lift force is proportional to the angle. In the framework of a quasi-static approach, the instantaneous damping force exerted on a cylinder oscillating in axial flow is equivalent to the normal force exerted on a cylinder placed in an oblique flow.

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References

Figures

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Fig. 1

Cylinder in near axial flow with an angle α, definition of the normal force FN, the lift force FL, and the drag force FD

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Fig. 2

Experimental setup

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Fig. 3

Position of the velocity profiles in the y direction along the cylinder at an azimuthal angle θ = 180 deg

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Fig. 4

Mesh zoom on the end of the cylinder

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Fig. 5

Lift and drag contributions to the normal force CL cos α et CD sin α such as CN = CL cos α + CD sin α. Comparison between experimental measurements and CFD simulation results. Linear regime for |α| < 5 deg and comparison with the cross flow principle for |α| > 5 deg.

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Fig. 6

Experimental and numerical lift contributions to the normal force CL cos α. A transition between the linear and the quadratic regimes is observed.

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Fig. 7

Velocity profiles at a yaw angle of 5 deg. •: experiments and –: CFD simulations.

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Fig. 8

Velocity in the x-direction, cylinder in near-axial flow with a yaw angle α = 5 deg, view in the plane (x,y)

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Fig. 9

Velocity in the x-direction (defined in Fig. 3), cylinder in near-axial flow with a yaw angle α = 5 deg, view in the plane (y,z) at a distance x = 0.46 m from the first end of the cylinder

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Fig. 10

Angular position of the pressure tap. View in the place (y, z).

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Fig. 11

Mean pressure distribution around the cylinder at a yaw angle α = 5 deg

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