Control of a turbulent flow separated at mid-chord along an airfoil with DBD plasma actuators

Abstract The goal of the present experimental study is to investigate the ability of surface DBD plasma actuators to delay flow separation along the suction side of a NACA0015 airfoil. Three single surface DBD actuators that can operate separately are mounted on the suction side of the profile, at 18%, 27% and 37% of the chord length. The boundary layer is transitioned by a tripper to be sure that the flow control is not due to the laminar-to-turbulent transition. The angle of attack is equal to 11.5° and the free-stream velocity to U 0  = 40 m/s, resulting in a chord-based Reynolds number of Re c  = 1.33 × 10 6 . The flow is studied with a high-resolution PIV system. In such conditions, the baseline flow separation occurs at 50% of chord. Then, the different single DBD have been switched on separately, in order to investigate the actuator location effect. One highlights that the DBD located at x c /c = 18% is more effective than the two others ones, with a separation delay up to 64% of chord. When the three DBDs operate simultaneously, the separation point moves progressively toward the trailing edge when the high voltage is increased, up to 76% of chord at 20 kV. Finally, the effect of the actuation frequency on the control authority has been investigated, by varying the value of the operating frequency and by burst-modulation. For frequencies equal to 50 Hz and 500 Hz (reduced frequency F +  = 0.31 and 3.1), the separation has been delayed at 76 and 80% of chord, respectively.

[1]  Thomas Corke,et al.  Plasma Flaps and Slats: An Application of Weakly Ionized Plasma Actuators , 2004 .

[2]  Min Jia,et al.  Modelling of plasma aerodynamic actuation driven by nanosecond SDBD discharge , 2013 .

[3]  Xin Dai,et al.  The Physics and Phenomenology of Paraelectric One Atmosphere Uniform Glow Discharge Plasma (OAUGDP) Actuators for Aerodynamic Flow Control , 2005 .

[4]  Cameron Tropea,et al.  Online-characterization of dielectric barrier discharge plasma actuators for optimized efficiency of aerodynamical flow control applications , 2011 .

[5]  T. Corke.  Separation Control on high angle of attack airfoil using plasma actuator , 2003 .

[6]  E. Moreau,et al.  Optical visualization and electrical characterization of fast-rising pulsed dielectric barrier discharge for airflow control applications , 2012 .

[7]  E. Moreau,et al.  Lift and drag performances of an axisymmetric airfoil controlled by plasma actuator , 2009 .

[8]  T. Corke,et al.  Leading-Edge Separation Control Using Alternating-Current and Nanosecond-Pulse Plasma Actuators , 2014 .

[9]  Israel J Wygnanski,et al.  Active management of naturally separated flow over a solid surface. Part 1. The forced reattachment process , 2004, Journal of Fluid Mechanics.

[10]  Israel J Wygnanski,et al.  The control of flow separation by periodic excitation , 2000 .

[11]  Eric Moreau,et al.  On the Vortex Dynamic of Airflow Reattachment Forced by a Single Non-thermal Plasma Discharge Actuator , 2011 .

[12]  Subrata Roy,et al.  Three-dimensional flow measurements induced from serpentine plasma actuators in quiescent air , 2012 .

[13]  J. Roth,et al.  Aerodynamic flow acceleration using paraelectric and peristaltic electrohydrodynamic effects of a One Atmosphere Uniform Glow Discharge Plasma , 2003 .

[14]  S. Wilkinson,et al.  Dielectric Barrier Discharge Plasma Actuators for Flow Control , 2010 .

[15]  Eric Moreau,et al.  Capabilities of the dielectric barrier discharge plasma actuator for multi-frequency excitations , 2010 .

[16]  Binjie Dong,et al.  Experimental study of a DBD surface discharge for the active control of subsonic airflow , 2008 .

[17]  Thomas Corke,et al.  Plasma Flow Control Optimized Airfoil , 2005 .

[18]  E. Moreau,et al.  Optimization of a dielectric barrier discharge actuator by stationary and non-stationary measurements of the induced flow velocity: application to airflow control , 2007 .

[19]  Cameron Tropea,et al.  Power consumption, discharge capacitance and light emission as measures for thrust production of dielectric barrier discharge plasma actuators , 2011 .

[20]  Eric Moreau,et al.  Airflow control by non-thermal plasma actuators , 2007 .

[21]  Jiezhi Wu,et al.  Post-stall flow control on an airfoil by local unsteady forcing , 1998, Journal of Fluid Mechanics.

[22]  Louis N. Cattafesta,et al.  Numerical Study of Resonant Interactions and Flow Control in a Canonical Separated Flow , 2005 .

[23]  Jesse C Little,et al.  High Lift Airfoil Leading Edge Separation Control with Nanosecond Pulse Driven DBD Plasma Actuators , 2010 .

[24]  Eric Moreau,et al.  Application of an AC barrier discharge actuator to control airflow separation above a NACA 0015 airfoil: Optimization of the actuation location along the chord , 2008 .

[25]  Stall control at high angle of attack with periodically excited EHD actuators , 2004 .

[26]  T. Corke,et al.  Single dielectric barrier discharge plasma enhanced aerodynamics: physics, modeling and applications , 2009 .

[27]  Jinjun Wang,et al.  Recent developments in DBD plasma flow control , 2013 .

[28]  Martiqua L. Post,et al.  Scaling Effects of an Aerodynamic Plasma Actuator , 2007 .

[29]  Eric Moreau,et al.  Positive and negative sawtooth signals applied to a DBD plasma actuator – influence on the electric wind , 2009 .

[30]  E. Jumper,et al.  Mechanisms and Responses of a Dielectric Barrier Plasma Actuator: Geometric Effects , 2004 .

[31]  Rajat Mittal,et al.  Large-eddy simulation of flow through a low-pressure turbine cascade , 2001 .

[32]  Guillermo Artana,et al.  Stall control at high angle of attack with plasma sheet actuators , 2006 .

[33]  M. Kotsonis,et al.  Performance improvement of plasma actuators using asymmetric high voltage waveforms , 2012 .

[34]  B. Khoo,et al.  Numerical simulation of nanosecond pulsed dielectric barrier discharge actuator in a quiescent flow , 2014 .

[35]  L. Graftieaux,et al.  Combining PIV, POD and vortex identification algorithms for the study of unsteady turbulent swirling flows , 2001 .

[36]  R. Joussot,et al.  Plasma morphology and induced airflow characterization of a DBD actuator with serrated electrode , 2013 .

[37]  Eric Moreau,et al.  Slope seeking for autonomous lift improvement by plasma surface discharge , 2010 .

[38]  M. Samimy,et al.  Separation control with nanosecond-pulse-driven dielectric barrier discharge plasma actuators , 2012 .

[39]  Thomas C. Corke,et al.  Overview of Plasma Flow Control: Concepts, Optimization, and Applications , 2005 .

[40]  E. Moreau,et al.  Streamer inhibition for improving force and electric wind produced by DBD actuators , 2012 .

[41]  Eric Moreau,et al.  Electrical and mechanical characteristics of surface AC dielectric barrier discharge plasma actuators applied to airflow control , 2014, Experiments in Fluids.

[42]  Eric J. Jumper,et al.  Mechanisms and Responses of a Single Dielectric Barrier Plasma Actuator: Plasma Morphology , 2004 .

[43]  Eric Moreau,et al.  A large-scale multiple dielectric barrier discharge actuator based on an innovative three-electrode design , 2009 .

[44]  M. Post,et al.  Separation Control using Plasma Actuators : Dynamic Stall Control on an Oscillating Airfoil , 2004 .

[45]  Eric Moreau,et al.  On the benefits of hysteresis effects for closed-loop separation control using plasma actuation , 2011 .