Numerical Study on Laminar Flow Over a Cylinder and Its Rotating Controllers for Suppressing the Vortex Shedding

Document Type : Research Article

Authors

Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, Iran

Abstract

Vortex shedding exerts the dynamic and periodic forces on cylindrical structures and increasing the FIV and even the resonance. Controlling the flow over the cylinder and delaying the separation, reduces the vortex shedding and achieves the longer lifetime. Among different passive and active methods of flow control, using the flow controllers is a highly practical method. Two small rotating cylinders, near the main cylindrical structure, can be actively used for this purpose. The effects of the geometrical parameters on the oscillatory response of a particular main circular cylinder have been numerically studied for a particular laminar flow regime. The finite volume based on SIMPLE algorithm has been used for simulating the unsteady flow field. The procedure of finding the correct position to controllers is surveyed. The reduction indexes are defined for calculation the effectiveness of controllers. It is shown that there is an optimum position for the proposed condition in which the variation of lift ad drag forces for the cylinder and two rotating controllers are the minimum one and the vortex shedding is suppressed, too. Moreover, the mean drag coefficient is reduced significantly in the prescribed position for the main cylinder and two rotating controllers.

Keywords

Main Subjects


[1] M.M. Zdravkovich, Flow around circular cylinders: Fundamentals, Vol.1, Oxford University Press, New York, 1997.
[2] M.M. Zdravkovich, M.M., 2003. Flow around circular cylinders: Applications, Vol. 2, Oxford University Press, New York, 2003.
[3] B.M. Sumer, J. Fredsoe, J., Hydrodynamics around cylindrical structures, Revised Ed. Advanced Series on Ocean Engineering, Vol. 26, World Scientific Publishing Co., 2006.
[4] C. Tropea, A.L. Yarin, J.F. Foss, Handbook of experimental fluid Mechanics, Springer Printing and binding: Sturtz GmbH, ISBN: 978-3-540-25141-5, 2007.
[5] P.R.N. Childs, Rotating Flow, Elsevier, Butterworth-Heinemann, ISBN 978-0-12-382098-3, 2011.
[6] C. H. K. Williamson, Oblique and parallel modes of vortex shedding in the wake of a circular cylinder at low Reynolds numbers, J. Journal of Fluid Mechanics, 206 (1989) 579-627.
[7] H.M. Badr, M. Coutanceau, S.C.R. Dennis, C. Menard, Unsteady flow past a rotating cylinder at Reynolds numbers 103 and 104, Journal of Fluid Mechanics, 220 (1990) 459-484.
[8] A. Maurel, P. Petitjeans, Vortex Structure and Dynamics, Lectures of a Workshop Held in Rouen, France, April 27-28, Springer, 1999.
[9] M. Brocchini, F. Trivellato, Vorticity and turbulence effects in fluid structure interaction, An application to hydraulic structure design, WIT press, ISBN: 1-84564-052-7, 2006.
[10] P.G. Drazin, Introduction to Hydrodynamic Stability, Cambridge University Press, ISBN: 0-521-80427-2, 2002.
[11] J.N. Newman, Marine Hydrodynamics, The MIT Press Cambridge and Massachusetts. ISBN: 0-262-14026-8, 1999.
[12] R.D. Blevins, Flow Induced Vibration. Krieger, 2001.
[13] M.P. Paidoussis, Fluid structure interactions, slender structures and axial flow, Vol.1, Academic Press, ISBN: 0-12-544360-9, 1999.
[14] M.P. Paidoussis, Fluid structure interactions, slender structures and axial flow, Vol. 2, Elsevier, ISBN: 0-12-544361-7, 2004.
[15] A. Farshidianfar, Y. Narenjane, clean and infinite energy harvesting from self-exciting vibration caused by vortices, Mechanical Engineering, 77 (2012) 73-85 (In Persian).
[16] J.H. Lee, M.M. Bernitsas, High-damping high-Reynolds VIV tests for energy harnessing using the VIVACE converter, Journal of Ocean Engineering, 38 (2011) 1697-1712.
[17] W. Dung-An, C. Chun-Yuan, H. Huy-Tuan, Electromagnetic energy harvesting from vibrations induced by Karman Vortex Street, Journal of Mechatronics, 22(6) (2012) 746-75.
[18] S. Rashidi, M. Hayadavoodi, J.A. Esfahani, Vortex shedding suppression and wake control: A review, Journal of Ocean Engineering, 126 (2016) 57-80.
[19] V.J. Modi, S. Hill, T. Yokomizo, Drag reduction of truck through boundary-layer control, Journal of Wind Engineering and Industrial Aerodynamics., 54/55 (1995) 583-594.
[20] C. Morton, S. Yarusevych, On vortex shedding from low aspect ratio dual step cylinders, Journal of Fluids and Structures, 44 (2014) 251-269.
[21] J. Wu, C. Shu, N. Zhao, Numerical study of flow control via the interaction between a circular cylinder and a flexible plate, Journal of Fluids and Structures, 49 (2014) 594-613.
[22] S. Malekzadeh, A. Sohankar, Reduction of fluid forces and heat transfer on a square cylinder in a laminar flow regime using a control plate, International Journal of Heat and Fluid Flow, 34 (2012) 15-27.
[23] D.K. Maiti, R. Bhatt, Vortex shedding suppression and aerodynamic characteristics of square cylinder due to offsetting of rectangular cylinders towards a plane, Journal of Ocean Engineering, 82 (2014) 91-104.
[24] J.C. Chen, P.S. Chuan, Suppression of vortex shedding from a rectangular cylinder at low Reynolds numbers, Journal of Fluids and Structures, 43 (2013) 15-27.
[25] M. Pasandidefard, A.A. Hashempour, Drag reduction on a cylinder by installing a rod at the upstream, in: 10th congress of Iranian aerospace society, Tehran, Tarbiat-Moddares University, (2011) (In Persian).
[26] S. Mittal, A. Raghuvanshi, Control of vortex shedding behind circular cylinder for flows at low Reynolds numbers, International Journal for Numerical Methods in Fluids, 35 (2001) 421-447.
[27] A. Dipankar, T.K. Sengupta, S.B. Talla, Suppression of vortex shedding behind a circular cylinder by another control cylinder at low Reynolds numbers, Journal of Fluid Mechanics, (2006) 1-20.
[28] J.O. Pralits, L. Brandt, F. Giannetti, Instability and sensitivity of the flow around a rotating circular cylinder, Journal of Fluid Mechanics, (2010) 1-24.
[29] S. Mittal, Control of flow past bluff bodies using rotating
control cylinders, Journal of Fluids and Structures, 15 (2001) 291-326.
[30] I. Korkischko, J.R. Meneghini, Suppression of vortex-induced vibration using moving surface boundary-layer control, Journal of Fluids and Structures, 34 (2012) 259–270.
[31] W. Jian Sheng, X. Yuan Xin, T. Young Sheng, Active control of circular cylinder flow by affiliated rotating cylinders, Science China, Technological Sciences, 56 (2013) 1187-1197.
[32] H. Zhu, J. Yao, Y. Ma, H. Zhao, Y. Tang, Simultaneous CFD evaluation of VIV suppression using smaller control cylinders, Journal of Fluids and Structures, 57 (2015) 66-80.
[33] S. Muddada, B.S.V. Patnaik, An active flow control strategy for the suppression of vortex structures behind a circular cylinder, European Journal of Mechanics B/Fluids, 29 (2010) 93–104.
[34] S. Patankar, Numerical Heat Transfer and Fluid Flow, Hemisphere Publishing Corporation, McGraw Hill Book Co., New York, 1980.
[35] H.M. Badr, S.C.R. Dennis, P.J.S. Young, Steady and unsteady flow past a rotating circular cylinder at low Reynolds numbers, Journal of Computers & Fluids, 17(4) (1989) 579-609.
[36] S. Mittal, B. Kumar, Flow past a rotating cylinder, Journal of Fluid Mechanics, 476 (2003) 303-334.