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ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561
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EXPERIMENTAL STUDY OF COHERENT FLOW STRUCTURES BEHIND TWO SIMILAR NORMAL FLAT PLATES IN TANDEM ARRANGEMENT
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RÉSUMÉ
Flow structures behind two identical normal flat plates in tandem arrangement have been investigated for various gap ratios (g/D) between the plates at a high Reynolds number of 3.3 × 104. Constant-temperature hot wire anemometers (CTA) were employed to quantitatively measure the near wake properties behind the downstream plate. The effects of various gap ratios (g/D) ranging from 0.2 to 2.0 were probed, and it was observed that the wake region behind the normal flat plates in tandem arrangement exhibits higher Strouhal number than a normal single flat plate. Moreover, the plotted contours demonstrated that the centerline behind the plates encountered a shedding frequency corresponding to twice the reference shedding frequency (2fs). Finally, regions associated with the highest Reynolds stress were spotted along the edges of the plates in the wake region.
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Afgan, I., Benhamadouche, S., Han, X., Sagaut, P., and Laurence, D., Flow over a Flat Plate with Uniform Inlet and Incident Coherent Gusts, J. FluidMech., vol. 720, pp. 457-485, 2013.
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Auteri, F., Belan, M., Cassinelli, C., and Gibertini, G., Interacting Wakes of Two Normal Flat Plates: An Investigation Based on Phase Averaging of LDA Signals, J. Visualiz., vol. 12, pp. 307-321, 2009.
-
Auteri, F., Belan, M., Gibertini, G., and Grassi, D., Normal Flat Plates in Tandem: An Experimental Investigation, J. Wind Eng. Ind. Aerod., vol. 96, pp. 872-879, 2008.
-
Bentley, J. and Mudd, J., Vortex Shedding Mechanisms in Single and Dual Bluff Bodies, Flow Meas. Instrum., vol. 14, pp. 23-31, 2003.
-
Chein, R. and Chung, J., Discrete-Vortex Simulation of Flow over Inclined and Normal Plates, Comput. Fluids, vol. 16, pp. 405-427, 1988.
-
Hacisevki, H. and Teimourian, A., Comparison of Flow Structures in the Wake Region of Two Similar Normal Flat Plates in Tandem and a Square Cylinder, Exp. Therm. Fluid Sci., vol. 69, pp. 169-177, 2015.
-
Hacisevki, H. and Teimourian, A., Interacting Wakes of a Narrow and a Wide Flat Plate in Tandem Arrangement, Fluid Dyn. Res., vol. 48, 015505, 2016.
-
Hangan, H. and Vickery, B., Buffeting of Two-Dimensional Bluff Bodies, J. Wind Eng. Ind. Aerod., vol. 82, pp. 173-187, 1999.
-
Hussain, A., Coherent Structures and Turbulence, J. FluidMech., vol. 173, pp. 303-356, 1986.
-
Irwin, P.A., Bluff Body Aerodynamics in Wind Engineering, J. Wind Eng. Ind. Aerod., vol. 96, pp. 701-712, 2008.
-
Kiya, M. and Matsumura, M., Incoherent Turbulence Structure in the Near Wake of a Normal Plate, J. Fluid Mech., vol. 190, pp. 343-356, 1988.
-
Matsumoto, M., Vortex Shedding of Bluff Bodies: A Review, J. Fluids Struct., vol. 13, pp. 791-811, 1999.
-
Mazharoglu, C. and Hacisevki, H., Coherent and Incoherent Flow Structures Behind a Normal Flat Plate, Exp. Therm. Fluid Sci., vol. 19, pp. 160-167, 1999.
-
Nakamura, Y., Vortex Shedding from Bluff Bodies and a Universal Strouhal Number, J. Fluids Struct., vol. 10, pp. 159-171, 1996.
-
Narasimhamurthy, V.D. and Andersson, H.I., Numerical Simulation of the Turbulent Wake Behind a Normal Flat Plate, Int. J. Heat Fluid Flow, vol. 30, pp. 1037-1043, 2009.
-
Reynolds, W. and Hussain, A., The Mechanics of an Organized Wave in Turbulent Shear Flow. Part 3. Theoretical Models and Comparisons with Experiments, J. Fluid Mech., vol. 54, pp. 263-288, 1972.
-
Saha, A.K., Far-Wake Characteristics of Two-Dimensional Flow Past a Normal Flat Plate, Phys. Fluids, vol. 19, 128110, 2007.
-
Sumner, D., Two Circular Cylinders in Cross-Flow: A Review, J. Fluids Struct., vol. 26, pp. 849-899, 2010.
-
Teimourian, A., Hacisevki, H., and Bahrami, A., Experimental Study on Flow Past Two Inclined Flat Plates in Tandem Arrangement, J. Wind Eng. Ind. Aerod., vol. 169, pp. 1-11, 2017.
-
Zdravkovich, M.M., Different Modes of Vortex Shedding: An Overview, J. Fluids Struct., vol. 10, pp. 427-437, 1996.
-
Zdravkovich, M.M., Flow around Circular Cylinders: Vol. 1. Fundamentals, J. Fluid Mech., vol. 350, pp. 377-378, 1997.
-
Zdravkovich, M.M., Flow Around Circular Cylinders: Vol. 2. Applications, Oxford, UK: Oxford University Press, 2003.
-
Zhang, H. and Melbourne, W., Interference between Two Circular Cylinders in Tandem in Turbulent Flow, J. Wind Eng. Ind. Aerod., vol. 41, pp. 589-600, 1992.