Abstract
This work aims to develop a process for controlling a cylinder wake, especially the von Karman vortex street, in such way so as to drastically reduce the drag coefficient. A new technique for influencing the cylinder wake is proposed in the present experimental study. The flow around a circular cylinder is perturbed by temporarily changing the cylinder diameter. Experiments have been performed for Reynolds numbers in the range Re=9,500 to Re=31,500. Three values of the controlling frequencies are considered: fs1=0.41, fs2=0.54 and fs3=0.73, in addition to the stationary case corresponding to a non-deformable cylinder, fs0=0. The visualisation flow shows that the pulsing motion of the cylinder walls greatly influences both the near and far wake dynamics. A decrease of the drag is expected.
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Notes
For further details, this Reynolds number is already considered in a published paper devoted to a comparative study of the experimental and numerical results, Hanchi et al. 2003.
References
Barbi C, Favier DP, Maresca CA, Telionis DP (1986) Vortex shedding and lock-on of a circular cylinder in oscillatory flow. J Fluid Mech 170:527–544
Chyu C, Rockwell D (1996) Evolution of patterns of streamwise vorticity in the turbulent near-wake of a circular cylinder. J Fluid Mech 320:527–544
Coutanceau M, Defaye JR (1991) Circular cylinder wake configuration: a flow visualization survey. App Mech Rev 44:255–305
Cousteix J (1989) Aérodynamique: Turbulence et couche limite. Cepadues-Editions, Toulouse. France
Detemple-Laake E, Eckelmann H (1989) Phenomenology of Karman vortex streets in oscillatory flow. Exp Fluids 7:217–227
Gerrard JH (1966) The mechanics of the formation region of vortices behind bluff bodies. J Fluid Mech 25:401–413
Griffin OM, Ramberg SE (1976) Vortex shedding from a cylinder vibrating in line with an incident uniform flow. J Fluid Mech 75(2):257–271
Griffin OM, Votaw CW (1972) The vortex street in the wake of a vibrating cylinder. J Fluid Mech 51(1):31–48
Hanchi S (1998) Contribution à l’etude de l’ecoulement et du transfert de chaleur autour d’un cylindre déformable. PhD thesis, Université de Valenciennes et du Hainaut-Cambresis, Valenciennes, France
Hanchi S, Askoviç R (1998) Approche numérique du transfert thermique convectif pour un cylindre circulaire déformable. Int J Heat Mass Tran 41:1385–1396
Hanchi S, Askovic R, Ta-Phuoc L (1999) Numerical simulation of a flow around an impulsively started radially deforming circular cylinder. Int J Num Meth Fluids 29:555–573
Hanchi S, Askovic R (2000) Numerical simulation of the influence of the deformation frequency of a radially deforming circular cylinder impulsively started on convected heat transfer. In: Proceedings of the 9th international conference on applied mechanics and mechanical engineering, Cairo, Egypt, May 2000, pp 108–120
Hanchi S, Oualli H, Askoviç R, Bouabdallah A (2003) Numerical simulation and experimental visualization of the influence of the deformation frequency of a radially deforming circular cylinder impulsively started on cylinder wake. Int J Num Meth Fluids 41:905–930
Koopmann GH (1967) The vortex wakes of vibrating cylinders at low Reynolds numbers. J Fluid Mech 28(3):501–512
Koumoutsakos P, Leonard A (1995) High-resolution simulations of the flow around an impulsively started cylinder using vortex method. J Fluid Mech 196:1–38
Lecointe Y, Piquet J (1984) On the use of several compact methods for the study of unsteady incompressible viscous flow round a circular cylinder. Comput Fluids 12(4):255–280
Ongoren A, Rockwell D (1988) Flow structure from an oscillating cylinder. Part 1. Mechanism of phase shift and recovery in the near wake. J Fluid Mech 191:197–223
Schumm M, Berger E, Monkevits P (1994) Self-excited oscillations in the wake of two-dimensional bluff bodies and their control. J Fluid Mech 271:17
Shiels D, Leonard A (2001) Investigation of a drag reduction on a circular cylinder in rotary oscillation. J Fluid Mech 100(431):297–322
Smith PA, Stansby PK (1988) Impulsively started flow around a circular cylinder by the vortex. J Fluid Mech 194:45–77
Sreenivasan KR, Strykowsky PJ, Olinger DJ (1987) Landau equation and vortex shedding behind circular cylinders. In: Ghia KN (ed) Proceedings of the ASME forum on unsteady flow separation. ASME, New York, pp 1–13
Ta-Phuoc L (1980) Numerical analysis of unsteady secondary vortices generated by an impulsively started circular cylinder. J Fluid Mech 100(1):111–128
Ta-Phuoc L, Bouard R (1985) Numerical solution of the early stage of the unsteady viscous flow around a circular cylinder: a comparison with experimental visualization and measurements. J Fluid Mech 160:93–117
Zdravkovich MM (1997) Flow around circular cylinders, vol 1. Oxford University Press, Oxford, UK
Acknowledgements
The authors thank Mr. C. Tournier and Mr. L. Labraga for their helpful suggestions during the course of this work.
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Oualli, H., Hanchi, S., Bouabdallah, A. et al. Experimental investigation of the flow around a radially vibrating circular cylinder. Exp Fluids 37, 789–801 (2004). https://doi.org/10.1007/s00348-004-0849-4
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DOI: https://doi.org/10.1007/s00348-004-0849-4