Active flow control around a two-dimensional geometry positioned near the ground is experimentally studied. Results for two model configurations are reported: one square-back and the other with a flap added at the rear-corner. The model rear end static pressure and the near-wake flow properties are derived from wall-pressure measurements, high-speed Particle Image Velocimetry acquisitions and hot-wire anemometry. The control flow is obtained from a pulsed jet system driven in open loop. The study aims at distinguishing the individual influence of the passive flap and the control system. The actuation frequency is shown to be a determining parameter regarding rear end pressure increase.
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Sébastien Chaligné 1, 2 ; Thomas Castelain 1, 3 ; Marc Michard 1 ; Daniel Juvé 1
@article{CRMECA_2013__341_3_289_0, author = {S\'ebastien Chalign\'e and Thomas Castelain and Marc Michard and Daniel Juv\'e}, title = {Active control of the flow behind a two-dimensional bluff body in ground proximity}, journal = {Comptes Rendus. M\'ecanique}, pages = {289--297}, publisher = {Elsevier}, volume = {341}, number = {3}, year = {2013}, doi = {10.1016/j.crme.2012.10.043}, language = {en}, }
TY - JOUR AU - Sébastien Chaligné AU - Thomas Castelain AU - Marc Michard AU - Daniel Juvé TI - Active control of the flow behind a two-dimensional bluff body in ground proximity JO - Comptes Rendus. Mécanique PY - 2013 SP - 289 EP - 297 VL - 341 IS - 3 PB - Elsevier DO - 10.1016/j.crme.2012.10.043 LA - en ID - CRMECA_2013__341_3_289_0 ER -
%0 Journal Article %A Sébastien Chaligné %A Thomas Castelain %A Marc Michard %A Daniel Juvé %T Active control of the flow behind a two-dimensional bluff body in ground proximity %J Comptes Rendus. Mécanique %D 2013 %P 289-297 %V 341 %N 3 %I Elsevier %R 10.1016/j.crme.2012.10.043 %G en %F CRMECA_2013__341_3_289_0
Sébastien Chaligné; Thomas Castelain; Marc Michard; Daniel Juvé. Active control of the flow behind a two-dimensional bluff body in ground proximity. Comptes Rendus. Mécanique, Volume 341 (2013) no. 3, pp. 289-297. doi : 10.1016/j.crme.2012.10.043. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.10.043/
[1] On the wake with and without vortex shedding suppression behind a two-dimensional square cylinder in proximity to a plane wall, J. Wind Eng. Ind. Aerodyn., Volume 98 (2010), pp. 492-503
[2] K.R. Cooper, The effect of front-edge rounding and rear-edge shaping on the aerodynamic drag of bluff vehicles in ground proximity, Technical Report, SAE Technical Paper, SAE International, 1985.
[3] S. Kowata, J. Ha, S. Yoshioka, T. Kato, Y. Kohama, Drag force reduction of a bluff-body with an underbody slant and rear flaps, Technical Report, SAE Int. J. Commer. Veh., 2008.
[4] S. Li, Analysis of numerical simulation on reducing drag of van body truck, Technical Report, SAE Technical Paper, SAE International, 2011.
[5] Drag reduction of an Ahmed car model by means of active separation control at the rear vehicle slant (H.-J. Rath; C. Holze; H.-J. Heinemann; R. Henke; H. Hanlinger, eds.), New Results in Numerical and Experimental Fluid Mechanics V, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 92, Springer, Berlin, Heidelberg, 2006, pp. 249-256
[6] C. Leclerc, E. Levallois, A. Kourta, P. Gilliéron, Aerodynamic drag reduction by synthetic jet: A 2d numerical study around a simplified car, Technical Report 2006-3337, in: 3rd AIAA Flow Control Conference, 2006.
[7] Changing lift and drag by jet oscillation: experiments on a circular cylinder with turbulent separation, Eur. J. Mech. B, Fluids, Volume 19 (2000) no. 5, pp. 575-595
[8] Numerical simulation of active separation control by a synthetic jet, J. Fluid Mech., Volume 574 (2007), pp. 25-58
[9] Control of turbulent separated flow over a backward-facing step by local forcing, Exp. Fluids, Volume 21 (1996), pp. 417-426
[10] The flow over a backward-facing step under controlled perturbation: laminar separation, J. Fluid Mech., Volume 238 (1992), pp. 73-96
[11] Feedback shear layer control for bluff body drag reduction, J. Fluid Mech., Volume 608 (2008), pp. 161-196
[12] Numerical simulation of the flow around a simplified vehicle model with active flow control, Int. J. Heat Fluid Flow, Volume 32 (2011) no. 1, pp. 192-200
[13] M. El-Alti, P. Kjellgren, L. Davidson, Drag reduction for trucks by active flow control of the wake behind the trailer, in: Proceedings of the Sixth International Symposium on Turbulence, Heat and Mass Transfer, 2009.
[14] Application of active flow control on generic 3d car models (R. King, ed.), Active Flow Control II, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 108, Springer, Berlin, Heidelberg, 2010, pp. 223-239
[15] Simulation of active drag reduction for a square-back vehicle (R. King, ed.), Active Flow Control II, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 108, Springer, Berlin, Heidelberg, 2010, pp. 241-255
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