Aerodynamic and Acoustical Analysis of Flow around a Circular Cylinder in a Channel and Parametric Study on the Effects of a Splitter Plate on the Generated Vibration and Noise

Parviz Ghadimi^1, , Saman Kermani², Sabra Razughi² and Rahim Zamanian²

¹Department of Computer Science, Federal University of Technology, Akure, Nigeria

²Cocoa Research Institute of Nigeria, Ibadan, Nigeria

Cite this paper:
Parviz Ghadimi, Saman Kermani, Sabra Razughi and Rahim Zamanian. Aerodynamic and Acoustical Analysis of Flow around a Circular Cylinder in a Channel and Parametric Study on the Effects of a Splitter Plate on the Generated Vibration and Noise. Applied Mathematics and Physics. 2013; 1(1):1-5. doi: 10.12691/amp-1-1-1

Abstract

Generated noise of moving objects in different fluids is one the most important subjects among scientists and researchers. Accordingly, in the present work, effects of splitters with different length and location on sound pressure level of circular cylinder are investigated by COMOSL software. Aerodynamic and aero-acoustic analyses are done in an air channel with Reynolds number 200. The analyses include 7 different cases of splitters. The obtained results indicate that splitters do not influence the frequency of lift force oscillation, but vibration force is reduced by about 99.6%. In the meantime, the SPL is increased 15.4 percent, when double splitters are located at the upper half of the cylinder. The best case scenario occurs when one splitter with a length equal to the diameter of cylinder is located at this position. In this situation, SPL is reduced by about 6.4 percent and lift force oscillation is increased by about 90.5 percent.

Keywords:
cylinder noise splitter lift

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

Figures

References:

[1]	Mori, Y., Hijikata. K., Nobuhara, T., “A fundamental study of symmetrical vortex generation behind a cylinder by wake heating or by splitter plate or mesh”, Int. J. Heat Mass Transfer, 29, 1193-1201, 1986.
[2]	Kawai, H., “Discrere vortex simulation for flow around a circular cylinder with a splitter plate”, Journal of Wind Engineering and Industrial Aerodynamics, 33(1-2), 153-160, 1990.
[3]	Kim, C. M., Konlisk, A. T., “The flow and acoustic field due to an inclined plate with a downstream splitter”, Journal of sound and Vibration, 166(2), 209-235, 1993.
[4]	Miau, J. J., Yang, C.C, Chou, J. H., Lee, K. R., “Suppression of low-frequency variations in vortex shedding by a splitter plate behind a bluff body”, Journal of Fluids and Structures, 7(8), 897-912, 1993.
[5]	Boisaubert, N., Texier, A., “Effect of a splitter plate on the near-wake development of semi-circular cylinder”, J. Experimental Thermal and Fluid science, 16(1-2), 100-111, 1998.
[6]	Nakayama, A., Noda, H., “LES simulation of flow around a bluff body fitted with a splitter plate”, Journal of Wind Engineering, 85(1), 85-96, 2000.
[7]	Akilli, H., Sahin, B., Tumen, N. F., “Suppression of vortex shedding of circular cylinder in shallow water by a splitter plate”, J. Flow Measurement and Instrumentation, 2005.
[8]	Hwang, J., Yang, K., “Drag reduction on a circular cylinder using dual detached splitter plates”, Journal of Wind Engineering, 16(4), 211-219, 2007.
[9]	Shukla, S, Govardhan, R. N., Arakeri, J. H., “Flow over a cylinder with a hinged-splitter plate”, Journal of Fluids and Structure, 2009.
[10]	Sudhakar, Y., Vengadesan, S., “Vortex shedding characteristics of circular cylinder with an oscillating splitter plate”, J. Computers and Fluids, 25(4), 713-720, 2012.
[11]	Sukri, A. M., Doolan, C. J., Wheatly, V., “The sound generated by a square cylinder with a splitter plate at low Reynolds number” J. Sound and Vibration. 330(15), 3620-3635, 2011.
[12]	Gu, F., Wang, J. S., Qiao, X. Q., Huang, Z., “Pressure distribution, fluctuating force and vortex shedding behavior of circular cylinder with rotatable splitter plates”, Journal of Fluids and Structures, 28, 263-278, 2012.
[13]	Bao, Y., Tao, J., “The passive control of wake flow behind a circular cylinder by parallel dual plates”, Journal of Fluid and Structures, 2012.
[14]	Oruc, V., Akar, M. A., Akilli, H., Sahin, B., “Suppression of asymmetric behavior downstream of two side-by-side circular cylinders with a splitter plate in a shallow water”, J. Measurements, 37,201-219, 2013.
[15]	Malekzadeh, S., Sohankar, A., “Reduction of fluid forces and heat transfer on a square cylinder in laminar flow regim using a control plate”, International Journal of Heat and Fluid Flow, 34, 15-27, 2012.
[16]	Seyyedi, S. M., Barania, H., Gorji-Bandpy, D.D., Soleimani, Soheil, “Numerical investigation of the effect of a splitter plate on convection in a two dimensional channel with an inclined square cylinder”, International Journal of Thermal Science, 61, 1-14, 2012.
[17]	Sukri, A. M., Doolan, C. J., Wheatley, V., “Low Reynolds number flow over a square cylinder with a detached flat plate”, International Journal of Heat and Fluid Flow, 36, 133-141, 2012.