Flow Separation Control on NACA0015 Airfoil Using Synchronized Jet Actuator

Document Type : Regular Article

Authors

1 Department of Mechanical Engineering, Istanbul Technical University, Istanbul, 34437, Turkey

2 Department of Aeronautical Engineering, Istanbul Technical University, Istanbul, 34469, Turkey

10.47176/jafm.15.02.33068

Abstract

In this study, a novel fluidic jet actuator is designed to control flow separation on a NACA0015 airfoil at various angles of attack. The U-shaped jet actuator has two rectangular slots implemented near the leading edge of the airfoil. It is driven by a piston mechanism and operates at three excitation frequencies. Depending on the motion of the mechanism, a synchronized jet flow is generated by blowing and suction at the dual exits of the actuator slots. The experimental studies are carried out in a subsonic wind tunnel. The unsteady 2D Computational Fluid Dynamics simulations are performed by Detached Eddy Simulation with the SST k-ω turbulence model where measured jet velocities at the exits of the actuator slots are imposed as boundary conditions to mimic motion of the piston. The results at the on-mode and off-mode of the actuator are evaluated in terms of surface pressure coefficient distributions on the airfoil and averaged aerodynamic force coefficients. At low angles of attack, there is an adequate match between numerical and experimental results for the base flow without any control. At higher angles of attack, flow separation becomes considerably dominant and stall prevention by active flow control is detected especially at high excitation frequencies‎.

Keywords


ANSYS FLUENT (2013). ANSYS Fluent Theory Guide.##
Buchmann, N. A., C. Atkinson and J. Soria (2013). Influence of ZNMF jet flow control on the spatio-temporal flow structure over a NACA-0015 airfoil. Experiments in Fluids 54(3).##
Cattafesta, L. N. and M. Sheplak (2011). Actuators for active flow control. Annual Review of Fluid Mechanics 43, 247–272.##
De Giorgi, M. G., C. G. De Luca, A. Ficarella and F. Marra (2015). Comparison between synthetic jets and continuous jets for active flow control: Application on a NACA 0015 and a compressor stator cascade. Aerospace Science and Technology 43, 256–280.##
Duvigneau, R. and M. Visonneau (2006). Optimization of a synthetic jet actuator for aerodynamic stall control. Computers and Fluids 35(6), 624–638.##
Genc, M. S., . Kaynak and H. Yapici (2011). Performance of transition model for predicting low Re aerofoil flows without/with single and simultaneous blowing and suction. European Journal of Mechanics, B/Fluids 30(2), 218–235.##
Gilarranz, J. L., L. W. Traub and O. K. Rediniotis (2005a). A new class of synthetic jet actuators - Part I: Design, fabrication and bench top characterization. Journal of Fluids Engineering, Transactions of the ASME 127(2), 367–376.##
Gilarranz, J. L., L. W. Traub and O. K. Rediniotis (2005b). A new class of synthetic jet actuators - Part II: Application to flow separation control. Journal of Fluids Engineering, Transactions of the ASME 127(2), 377–387.##
Godard, G., J. M. Foucaut and M. Stanislas (2006). Control of a decelerating boundary layer. Part 2: Optimization of slotted jets vortex generators. Aerospace Science and Technology 10(5), 394–400.##
Godard, G. and M. Stanislas (2006a). Control of a decelerating boundary layer. Part 1: Optimization of passive vortex generators. Aerospace Science and Technology 10(3), 181–191.##
Godard, G. and M. Stanislas (2006b). Control of a decelerating boundary layer. Part 3: Optimization of round jets vortex generators. Aerospace Science and Technology 10(6), 455–464.##
He, C., T. C. Corke and M. P. Patel (2009). Plasma flaps and slats: An application of weakly ionized plasma actuators. Journal of Aircraft 46(3), 864–873.##
Huang, L., P. G. Huang, R. P. LeBeau and T. Hauser (2004). Numerical study of blowing and suction control mechanism on NACA0012 airfoil. Journal of Aircraft 41(5), 1005–1013.##
Kim, S. H. and C. Kim (2009). Separation control on NACA23012 using synthetic jet. Aerospace Science and Technology 13(4-5), 172–182.##
Mohamed, G. E. H. (2001, jun). Flow control: passive, active, and reactive flow management. Choice Reviews Online 38(10), 38– 5597–38–5597.##
Mller-Vahl, H. F., C. Strangfeld, C. N. Nayeri, C. O. Paschereit and D. Greenblatt (2015). Control of thick airfoil, deep dynamic stall using steady blowing. AIAA Journal 53(2), 277–295.##
Schmidt, S. and F. Thiele (2003). Detached Eddy Simulation of Flow Around A-Airfoil. Flow, Turbulence and Combustion 71(1-4), 261– 278.##
Seifert, A., T. Bachar, D. Koss, M. Shepshelovich and I. Wygnanski (1993). Oscillatory blowing: A tool to delay boundary-layer separation. AIAA Journal 31(11), 2052– 2060.##
You, D. and P. Moin (2009). Active control of flow separation over an airfoil using synthetic jets. Solid Mechanics and its Applications 14, 551–561.##
Zhao, G. and Q. Zhao (2014). Parametric analyses for synthetic jet control on separation and stall over rotor airfoil. Chinese Journal of Aeronautics 27(5), 1051–1061.##
Zheng, J., Y. D. Cui, Z. Zhao, J. M. Li and B. C. Khoo (2018). Flow separation control over a NACA 0015 airfoil using nanosecondpulsed plasma actuator. AIAA Journal 56(6), 2220–2234.##
Volume 15, Issue 2 - Serial Number 63
March and April 2022
Pages 427-440
  • Received: 31 May 2021
  • Revised: 31 August 2021
  • Accepted: 28 September 2021
  • First Publish Date: 31 January 2022