Abstract
This investigation assesses the change of aerodynamic characteristics of triangular and star-shaped damaged airfoils with repair patches. Both experimental and numerical methods to determine aerodynamic coefficients are used in this study. The test model is a NACA 641-412 airfoil full span, which is considered by using five schematics: Clean model, damaged model, upper repaired model, lower repaired model, and fully repaired model. Repair patches are chosen based on the Aircraft battle damage repair (ABDR) manuals. Various effects of repair schemes on triangular and star-shaped damages are quantitatively and qualitatively illustrated. A novel visualization method by paint and oil is used in wind tunnel tests to study the effects of repair patches on the damaged airfoil.
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References
A. Baker, Bonded composite repair of fatigue-cracked primary aircraft structure, Composite Structures, 47 (11) (1999) 41, 443.
C. L. Carnegie, An investigation into the aerodynamic effects of wing patches, M.D. Thesis, Carleton University (1992).
K. Black, An investigation of the effects of battle-damaged repair patches on the aerodynamic performance of an airfoil, M.D. Thesis, Carleton Univ. (1995).
R. J. Kind, K. J. Block and C. L. Carnegie, A preliminary investigation of the effects of battle-damage repair patches on the aerodynamic performance of a CF-18 airfoil, Canadian Aeronautics and Space Journal, 44 (1998) 73–81.
P. M. Render and A. J. Walton, Aerodynamics of battle damaged wings-the influence of flaps camber and repair schemes, 23rd AIAA Applied Aerodynamic Conference, Toronto, Canada, 6-9 June (2005).
S. Djellal, P. M. Render and A. Ouibrahim, Effects of battle damage repairs on the aerodynamics of a wing, JNAGT05, Oran, 5-6 (2005).
Djellal and A. Ouibrahimi, Experimental investigation on aerodynamic performance of battle-damaged and repaired wings of an aircraft model, AIAA Conference (2008).
F. Etemadi, B. Yahyavi and M. Mani, Experimental and numerical investigations on an airfoil with triangular and star shaped damage, Part G: Journal of Aerospace Engineering, 226 (3) (2012).
F. Etemadi, M. Mani and M. Etemadi, Experimental and numerical analysis of repairing a triangular shaped airfoil, ASME-JSME-KSME 2011, Joint Fluids Engineering Conference, 1 (A B C and D) (2011).
S. Welburn, Battle damage repair techniques (ABDR), Damage Assessment and Repair, Headquarters Logistics Command RAF Wyton, Huntington, 25 April (1996).
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Recommended by Associate Editor Dongshin Shin
M. Mani received his B.Sc. in Mechanical Engineering from Amirkabir University of Technology, Iran, in 1976. He then graduated with M.Sc. and Ph.D. degrees in Aerospace Engineering from E.N.S.A.E. France in 1979 and 1983, respectively. Dr. Mani is currently a Full Professor and Research Chair in the Aerospace engineering Dept. at Amirkabir University of Technology, Iran. His research interests mainly include experimental study of unsteady aerodynamics, supersonic flow and shock boundary layer interaction.
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Etemadi, F., Etemadi, M., Mani, M. et al. Experimental and numerical analysis of aerodynamic effects of repair patches on damaged airfoils. J Mech Sci Technol 31, 651–658 (2017). https://doi.org/10.1007/s12206-016-1220-4
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DOI: https://doi.org/10.1007/s12206-016-1220-4