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Numerical Analysis of Separation Control Over an Airfoil Section

Saad Ahmed(1), Argin Nazari(2), Essam Wahba(3)

(1) Mechanical Engineering Department, College of Engineering, American University of Sharjah, United Arab Emirates
(2) Mechanical Engineering Department, College of Engineering, American University of Sharjah, United Arab Emirates
(3) Mechanical Engineering Department, College of Engineering, American University of Sharjah, United Arab Emirates


DOI: https://doi.org/10.15866/irease.v7i2.2057

Abstract


Flow past a rotating cylinder mounted at the leading edge of a NACA 0024 airfoil is analyzed numerically using ANSYS CFX software. The numerical simulation is done under transient conditions with shear stress transport SST turbulence model. The lift and drag coefficients are obtained and compared to the airfoil results with no rotation. The pressure coefficient distribution along the airfoil surface is also plotted along with the pressure contours. Grid independence tests are also performed to validate the results. The results indicate a delayed stall angle due to cylinder rotation in addition to an increase in the lift coefficient associated with an increase in lift to drag ratio values. The lift coefficient increases by 36 % and the stall angle is increased by 122 % for the airfoil with the rotating cylinder. All these characteristics lead to an improvement of the airfoil performance.
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Keywords


Rotating Cylinder; Airfoil Section; Boundary Layer Control; CFD; SST

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References


H. Schlichting, Boundary Layer Theory, ninth ed. (Springer, New York, 2000).

G. V. Lachmann, Boundary Layer and Flow Control, Its Principals and Application, (Pargamon Press, New York, 1961).

P. K. Chang, Separation of Flow, ninth ed. (Pergamon, Oxford, England, U.K., 1970)

L. Rosenhead, Laminar Boundary Layers, (Clarendon Press, Oxford, 1966).

W. S. Jonhson, J. S. Tennant, R. E. Stamps, Leading-EdgeRotating Cylinder for Boundary-Layer Control on Lifting Surfaces, Journal of Hydronautics, 9, No. 2, (1975), pp. 76-78.
http://dx.doi.org/10.2514/3.48139

T. Sayers, Lift Coeffcient and FlowVisualization on Leading Edge Rotating Cylinder Rudder, International Journal of Mechanical Engineering Education, 7, No. 2, (1979), pp. 75-79.

A. A. Hassan, L. N. Sankar, Separation Control Using Moving
http://dx.doi.org/10.2514/6.1989-972

Surface Effects: Numerical Simulation, Journal of Aircraft 29, No. 1, (1992), pp. 131-139.
http://dx.doi.org/10.2514/3.46136

J. D. Brooks, The Effect of a Rotating Cylinder at the Leading

and Trailing Edges of a Hydrofoil, U.S. Naval Ordnance Test Station,NAVWEPS Rept. 8042(1963).

V. J. Modi, V. S. Deshpande,A Joukowski Airfoil with Momentum Injection, Proceedings of the Conference on Atmospheric flight mechanics, (2000), pp. 445-453.
http://dx.doi.org/10.2514/6.2000-4108

A. Z. Al-Garni,A. M. Al-Garni, S. A. Ahmed, A. Z. Sahin, Flow Control for an Airfoil with Leading-edge Rotation: An -Experimental Study. Journal of Aircraft, 37,No. 4, (2000), pp.617-622.
http://dx.doi.org/10.2514/2.2673

A. P. Kothari, J. D. Anderson, Computational Study of Flow Over Miley and Wortmann Airfoils, Proceedings of the Conference on Low Reynolds Number Airfoil Aerodynamics, Univ. of Notre Dame, Notre Dame (1985), pp. 235-254

P.R. Viswanath, Some Thoughts on Separation Control Strategies, Sadhana 32 , parts 1 &2, (2007), pp. 83-92.
http://dx.doi.org/10.1007/s12046-007-0007-9

A.Shmilovich, Y. Yadlin, Flow Control for the Systematic Buildup of High-lift Systems, Journal of Aircraft, 45,No. 5, (2008) pp. 1680-1688.
http://dx.doi.org/10.2514/1.35327

A. Shmilovich,Y. Yadlin, Active Flow Control for Practical High-lift Systems, Journal of Aircraft,46,No. 4, (2009), pp. 1354-1364.
http://dx.doi.org/10.2514/1.41236

R. Sahu, B. Patnaik, CFD Simulation of Momentum Injection Control Past a Streamlined Body, International Journal of Numerical Methods for Heat & Fluid Flow, 21, No. 8 (2011), pp. 980-1001
http://dx.doi.org/10.1108/09615531111177750

ANSYS CFX 11- Solver Theory Guide, (2006).

J. Seifert, A review of the Magnus effect in aeronautics, Progress in Aerospace Sciences, 55, (2012),pp. 17-45.
http://dx.doi.org/10.1016/j.paerosci.2012.07.001

N. Thouault, C. Breitsamter, J. Seifert, C. Badalamenti, S.A. Prince, N.A. Adams, Numerical Analysis of a Rotating Cylinder with Spanwise Discs, ICAS (2010).
http://dx.doi.org/10.2514/1.j050856

T. Ashutosh, R. Thakur, A. Hazarika, K. M. Pandey, CFD Analysis of the Flow Over a National Advisory Committee for Aeronautics (NACA) 0009 Airfoil, (2013) International Review of Aerospace Engineering (IREASE), 6 (1), pp. 83-94.

Prasanta K. Sinha, A. K. Biswas, B. Majumdar, Computational Analysis of Flow Structure in a Curved Subsonic Diffusing Duct, (2013) International Review of Aerospace Engineering (IREASE), 6 (4), pp. 209-214.

Douvi, E.C., Margaris, D.P., Aerodynamic performance investigation under the influence of heavy rain of a NACA 0012 airfoil for wind turbine applications, (2012) International Review of Mechanical Engineering (IREME), 6 (6), pp. 1228-1235.


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