Abstract
The present experimental study interests in determining the influence of a linear plasma actuator (dielectric barrier discharge) on the development of a separated turbulent shear layer. More specifically, the plasma actuator is used to impose periodic perturbations at the step corner of a backward-facing step. Two different modes of excitation are explored. One concerns the shear layer mode of instability, a mode whose amplification leads to a minimization of the recirculation bubble. The present investigation shows how a dielectric barrier discharge plasma actuator can impose periodic perturbations that excite the shear layer mode and result in a strong regularization of the vortex street. The case of excitation at the shedding mode is also experimentally investigated using a DBD actuator. The measurements show the increase in Reynolds stress caused by this excitation as well as the specific growing mechanism of the shear layer. Indeed, phase-averaged flow measurements highlights the difference in the mechanism of development of the shear layer regarding the type of excitation used, the shear layer mode promoting a growing mechanism by fluid entrainment while the shedding mode enhancing the pairing of successive vortical flow structures.
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References
Chun KB, Sung HJ (1996) Control of turbulent separated flow over a backward-facing step by local forcing. Exp Fluids 21:417–426
Hasan MAZ (1992) The flow over a backward-facing step under controlled perturbation: laminar separation. J Fluid Mech 238:73–96
Winant CD, Browand FK (1974) Vortex pairing: the mechanism of turbulent layer growth at moderate Reynolds number. J Fluid Mech 63:237–255
Yoshioka S, Obi S, Masuda S (2001) Organized vortex motion in periodically perturbed turbulent separated flow over a backward-facing step. Int J Heat Fluid Flow 22:301–307
Hudy LM, Naguib AM, Humphreys WM (2003) Wall-pressure-array measurements beneath a separating/reattaching flow region. Phys Fluids 15
Bhattacharjee S, Scheelke B, Troutt TR (1986) Modification of vortex interactions in a reattaching separated flow. AIAA J 24
Gautier N, Aider JL (2015) Frequency-lock reactive control of a separated flow enabled by visual sensors. Exp Fluids 56:1–10
Yoshioka S, Obi S, Masuda S (2001) Turbulence statistics of periodically perturbed separated shear over a backward-facing step. Int J Heat Fluid Flow 22:393–401
Pouryoussefi GS, Mirzaei M, Hajipour M (2014) Experimental study of separation bubble control behind a backward-facing step using plasma actuators. Acta Mech 226:1153–1165
d’Adamo J, Sosa R, Artana G (2014) Active control of a backward facing step flow with plasma actuators. J Fluid Eng 136
Benard N, Sujar-Garrido P, Braud P, Bonnet JP, Moreau E (2016) Control of the coherent structure dynamics downstream of a backward facing step by DBD plasma actuator. Intern J Heat Fluid Flow 57:1–16
Sujar-Garrido P, Benard N, Moreau E, Bonnet JP (2015) Dielectric barrier discharge plasma actuator to control turbulent flow downstream of a backward-facing step. Exp Fluids 56:70
Benard N, Pons-Prats J, Periaux J, Bugeda G, Braud P, Bonnet JP, Moreau E (2016) Turbulent separated shear flow control by surface plasma actuator: experimental optimization by genetic algorithm approach. Exp Fluids 57:1–17
Gautier N, Duriez T, Aider JL, Noack B, Segond M, Abel M (2015) Closed-loop separation control using machine learning. J. Fluid Mech 770:442–457
Ho CM, Huang LS (1982) Subharmonics and vortex merging in mixing layers. J Fluid Mech 119:443–473
Martin RA, Kaul UK (2014) Optimization of perturbation parameters for simulated free shear layer flow. AIAA 2014-2223
Cherry NJ, Hillier R, Latour P (1984) Unsteady measurements in a separated and reattaching flow. J Fluid Mech 44
Driver DM, Seegmiller HL, Marvin JG (1987) Time-dependent behavior of reattaching shear layer. AIAA J 25
Oster D, Wygnanski I (1982) The forced mixing layer between parallel streams. J. Fluid Mechanics 123:91–130
Dandois J, Garnier E, Sagaut P (2007) Numerical simulation of active separation control by a synthetic jet. J Fluid Mech 574:25–58
Mansour NN, Hussain F, Buell C (1988) Subharmonic resonance in a mixing layer. In: Proceedings of the summer program, Center for Turbulent Research
Paschereit CO, Wygnanski I (1991) Instabilities in the axisymmetric jet: subharmonic resonance. In: Unger Y, Branover H (eds) Advances in turbulence studies. Progress in Astronautics and aeronautics. https://doi.org/10.2514/4.866227
Benard N, Moreau E (2014) Electrical and mechanical characteristics of surface AC dielectric barrier discharge plasma actuators applied to airflow control. Exp Fluids 55:1846
Moreau E., 2007, ‘Airflow control by non-thermal plasma actuators,’ J Phys D: Appl Phys 40
Sujar-Garrido P (2014) Active control of the turbulent flow downstream of a backward facing step with dielectric barrier discharge plasma actuators. Ph.D. thesis, University of Poitiers
Aono H, Sekimoto S, Sato M, Yakeno A, Nonomura T, Fujii K (2015) Computational and experimental analysis of flow structures induced by a plasma actuator with burst modulations in quiescent air. Mech Eng J 2
Benard N, Moreau E (2010) Capabilities of the dielectric barrier discharge plasma actuator for multi-frequency excitations. J Phys D Appl Phys 43:145201
Wang J-J, Choi K-S, Feng L-H, Jukes TN (2013) Recent developments in DBD plasma flow control. Prog Aerosp Sci 62:52–78
Reynolds WC, Hussain AKMF (1972) The mechanics of an organized wave in turbulent shear flow. Part 3. Theoretical models and comparisons with experiments. J Fluid Mech 54:263–288
Jeong J, Hussain F (1995) On the identification of a vortex. J Fluid Mech 285:69–94
Bonnet JP, Delville J, Glauser MN, Antonia RA, Bisset DK, Cole DR, Fiedler HE, Garem JH, Hilberg D, Jeong J, Kevlahan NKR, Ukeiley LS, Vincendeau E (1998) Collaborative testing of eddy structure identification methods in free turbulent shear flows. Exp Fluids 25:197–225
Hudy LM, Naguib AM, Humphreys WM (2007) Stochastic estimation of a separated-flow field using wall-pressure-array measurements. Phys Fluids 19:024103
Troutt TR, Scheelke B, Norman TR (1984) Organized structures in a reattaching separated flow field. J Fluid Mech 143:413–427
Dejoan A, Leschziner MA (2004) Large eddy simulation of periodically perturbed separated flow over a backward-facing step. Int J Heat Fluid Flow 25:581–592
Hu R, Wang L, Fu S (2016) Investigation of the coherent structures in flow behind a backward-facing step. Int J Numer Meth Heat Fluid Flow 26:1050–1068
Raman G, Rice EJ (1989) Subharmonic and fundamental high amplitude excitation of an axisymmetric jet. AIAA paper 1989-0993
Acknowledgements
This work was supported by FP7/2010-2013, MARS (grant agreement no. 266326). A part of the equipment has been funded by the French Government program “Investissements d’Avenir” (LABEX INTERACTIFS, reference ANR-11-LABX-0017-01).
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Benard, N., Sujar-Garrido, P., Bonnet, JP., Moreau, E. (2020). Shear Layer and Shedding Modes Excitations of a Backward-Facing Step Flow by Surface Plasma Discharge. In: Qin, N., Periaux, J., Bugeda, G. (eds) Advances in Effective Flow Separation Control for Aircraft Drag Reduction. Computational Methods in Applied Sciences, vol 52. Springer, Cham. https://doi.org/10.1007/978-3-030-29688-9_3
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