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Feedback control of bimodal wake dynamics

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Abstract

Feedback control is applied to symmetrize the bimodal dynamics of a turbulent blunt body wake. The flow is actuated with two lateral slit jets and monitored with pressure sensors at the rear surface. The physics-based controller is inferred from preliminary open-loop tests and is capable of symmetrizing the wake. A slight pressure recovery is achieved due to the net balance between the favourable effect of wake symmetrization and adverse effect of shear-layer mixing and vortex shedding amplification.

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References

  • Ahmed SR, Ramm G, Faltin G (1984) Some salient features of the time-averaged ground vehicle wake. SAE Tech. paper, technical report

  • Barros D (2015) Wake and drag manipulation of a bluff body using fluidic forcing. Ph.D. thesis, École Nationale Supérieure de Mécanique et d‘Aérotechnique (ISAE-ENSMA)

  • Barros D, Borée J, Noack BR, Spohn A (2016a) Resonances in the forced turbulent wake past a 3D blunt body. Phys Fluids 28(6):065104

    Article  Google Scholar 

  • Barros D, Borée J, Noack BR, Spohn A, Ruiz T (2016b) Bluff body drag manipulation using pulsed jets and Coanda effect. J Fluid Mech (in print)

  • Brunton SL, Noack BR (2015) Closed-loop turbulence control: progress and challenges. Appl Mech Rev 67(5):050801

    Article  Google Scholar 

  • Choi H, Moin P, Kim J (1994) Active turbulence control for drag reduction in wall-bounded flows. J Fluid Mech 262:75–110

    Article  MATH  Google Scholar 

  • Evrard A, Cadot O, Herbert V, Ricot D, Vigneron R, Délery J (2016) Fluid force and symmetry breaking modes of a 3D bluff body with a base cavity. J Fluids Struct 61:99–114

    Article  Google Scholar 

  • Grandemange M, Gohlke M, Cadot O (2012) Reflectional symmetry breaking of the separated flow over three-dimensional bluff bodies. Phys Rev E 86:035302

    Article  Google Scholar 

  • Grandemange M, Gohlke M, Cadot O (2013) Turbulent wake past a three-dimensional blunt body. Part 1. Global modes and bi-stability. J Fluid Mech 722:51–84

    Article  MATH  Google Scholar 

  • Grandemange M, Gohlke M, Cadot O (2014) Turbulent wake past a three-dimensional blunt body. Part 2. Experimental sensitivity analysis. J Fluid Mech 752:439–461

    Article  MATH  Google Scholar 

  • Oxlade AR, Morrison JF, Qubain A, Rigas G (2015) High-frequency forcing of a turbulent axisymmetric wake. J Fluid Mech 770:305–318

    Article  Google Scholar 

  • Pastoor M, Henning L, Noack BR, King R, Tadmor G (2008) Feedback shear layer control for bluff body drag reduction. J Fluid Mech 608:161–196

    Article  MATH  Google Scholar 

  • Pfeiffer J, King R (2012) Multivariable closed-loop flow control of drag and yaw moment for a 3D bluff body. AIAA paper (2012–2802)

  • Rigas G, Oxlade AR, Morgans AS, Morrison JF (2014) Low-dimensional dynamics of a turbulent axisymmetric wake. J Fluid Mech 755:R5

    Article  Google Scholar 

  • Rigas G, Morgans AS, Brackston RD, Morrison JF (2015) Diffusive dynamics and stochastic models of turbulent axisymmetric wakes. J Fluid Mech 778:R2

    Article  MathSciNet  Google Scholar 

Download references

Acknowledgments

We warmly thank J. M. Breux and J. Laumonier for the unconditional support during the experiments. RL and DB are supported by the OpenLab Fluidics between PSA Peugeot Citroën and Institut Pprime.

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Authors and Affiliations

  1. Institut PPRIME, CNRS – Université de Poitiers – ISAE-ENSMA, 86962, Futuroscope Chasseneuil, France

    Ruiying Li, Diogo Barros, Jacques Borée & Laurent Cordier

  2. LIMSI-CNRS, UPR 3251, 91405, Orsay Cedex, France

    Bernd R. Noack

  3. Technische Universität Braunschweig, 38108, Braunschweig, Germany

    Bernd R. Noack

  4. IMSIA-ENSTA ParisTech, CNRS, CEA, EDF, Université Paris-Saclay, 91762, Palaiseau Cedex, France

    Olivier Cadot

Authors
  1. Ruiying Li
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  2. Diogo Barros
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  3. Jacques Borée
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  4. Olivier Cadot
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  5. Bernd R. Noack
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  6. Laurent Cordier
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Correspondence to Ruiying Li.

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Li, R., Barros, D., Borée, J. et al. Feedback control of bimodal wake dynamics. Exp Fluids 57, 158 (2016). https://doi.org/10.1007/s00348-016-2245-2

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  • DOI: https://doi.org/10.1007/s00348-016-2245-2

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