Experimental and Numerical Investigation of Aerodynamic Performance of a Star-Shaped Damaged Wing

Document Type : Research Article

Authors

1 Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, Iran

2 Aerospace Engineering Department, Amirkabir University of Technology, Tehran, Iran

Abstract

In this paper the flow on a finite wing with star damage is numerically and experimentally investigated to understand the influences of damage on the aerodynamic characteristics of wing. To study the effects of different span positions, the damage was considered in tip, middle and root position of the wing span. The wing model of studies is a section of NACA 641-412 asymmetric airfoil with 200mm chord and 800mm span. The aerodynamic coefficients and their increments due to damage were extracted and the results were compared to each other and also to the experimental results. The flow visualization of flow over the damaged wing has been done with pain technique to make evident the flow structure on the model and to understand the influences of damage on the flow. For better understanding of the ability of numerical modeling prediction of aerodynamic performance of a damaged wing, the flow around the wing was numerically analyzed and was validated with the experimental results. A star damage with area about 1% of the wing, can decrease the lift coefficient about 6% and increase the drag coefficient about 15.7% compared with undamaged wing. The star damaged wing also experiences more negative pitching moment coefficient. The results of damage in different locations showed that the damage near to wing tip has less impact on decrement of aerodynamic efficiency.

For better understanding of the ability of numerical modeling prediction of aerodynamic performance of a damaged wing, the flow around the wing was numerically analyzed and was validated with the experimental results. A star damage with area about 1% of the wing, can decrease the lift coefficient about 6% and increase the drag coefficient about 15.7% compared with undamaged wing. The star damaged wing also experiences more negative pitching moment coefficient. The results of damage in different locations showed that the damage near to wing tip has less impact on decrement of aerodynamic efficiency.

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Main Subjects

References

[1] U.K. military standard, “Reduction of vulnerability to battle damage”, DEF STAN 00-970, 1, 1994.
[2] Irwin, A. J., “Investigation into aerodynamic effects of simulated battle damage to a wing”, Ph.D. Dissertation,Loughborough University, loughborough, U.K., 1998.
[3] Irwin, A. J., P. M. Render, J. J. McGuirk, B. Porobert and P. M. Alonze, . “Investigation into aerodynamic propertied of a battle damaged wing”. The 13th AIAA Applied Aerodynamics Conference, California, USA,1995.
[4] Hayes, C., “Effects of simulated wing damage on the aerodynamic characteristic of swept wing airplane model”. NASA, USA, TMX-1550, 1968.
[5] Betzina, M. and D. H.Brown, . “Aerodynamic characteristic of an A-4 b aircraft with simulated and actual gunfire damage to one wing”. NASA, USA, TMX- 73119, 1976.
[6] Westkaempir, J. C. and P. M. Chandrasekharan, “The effects of warhead-induced damage on the aeroelastic characteristics of lifting surface”.Aerodynamic Effects, 2, AFOSR, TR-80-1040, 1980.
[7] Scott, D. S. and R. Stearman, “The influence of ballistic damage on the aeroelastic characteristics of lifting surfaces”. AFOSR, USA,TR-80-0220, 1979.
[8] M. Lamb, “Effects of simulated damage on stability and control characteristics of a fixed-wing twin-verticaltail fighter model at mach numbers from 2.50 to 4.63”.NASA, USA, TMX-2815, 1973.
[9] Spearman, M. L., “Wind tunnel studies of the effects of simulated damage on the aerodynamic characteristics of aeroplanes and missiles”. NASA, USA, TM-84588,1982.
[10] Irwin, A. J. and P. M. Render. “The influence of internal structure on the aerodynamic characteristics of battledamaged wings”. The 14th AIAA Applied Aerodynamics Conference, AIAA96-2395, New Orlean, USA, 1996.
[11] Robinson, K. W. and J. G. Leishman, “The effect of ballistic damage on the aerodynamic of helicopter rotor airfoils”. Proceeding of 53rd Annual Forum of the American Helicopter Society, Virginia, USA, 1997.
[12] Leishman, J. G., “Aerodynamic characteristic of a helicopter rotor aerofoil as affected by simulated ballistic damage”. U. S army research lab, USA, Rept. ARLCR-66, 1993.
[13] Robinson, K. W. and J. G. Leishman, “Effect of ballistic damage on the aerodynamic of helicopter of rotor airfoils”. Journal of Aircraft, 35.5 (1998): 695-703.
[14] Irwin, A. J. and P. M. Render, .“The influence of midchord battle damage on the aerodynamic characteristics of two-dimensional wings”. The Aeronautical Journal,royal aeronautical society, 104.1033 (2000): 153-161.
[15] Render, P. M., “Aerodynamics of battle damaged wingsthe influence of flaps, camber and repair schemes”. 23rd AIAA Applied Aerodynamics Conference, AIAA-2005-4721, Toronto, Canada, 2005.
[16] Mani, M. and P. M. Render, “Experimental investigation into the aerodynamics characteristics of airfoils with triangular and star shaped through damage”. The 23rd AIAA Applied Aerodynamics Conference, AIAA-2005- 4978, Toronto, Canada, 2005.
[17] Shah, G. H., “Aerodynamic effects and modeling of damage to transport aircraft”. In Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Hawaii,USA, Augus 18-21, 2008.
[18] Rasi Marzabadi, F., B. Beheshti Boroumand, M. Mani and F. Ajalli, “Aerodynamic investigation of a damaged airfoil with wall effects”.scientiairanica, International journal of science and technology Transaction B:Mechanical engineering, 17.5 (2010): 395-405.
[19] Etemadi, F., B. Yahyavi and M. Mani. “Experimental and numerical investigations on an airfoil with triangularand star-shaped damage”.Proceedings of the Institution of Mechanical Engineers Part G, Journal of Aerospace Engineering, 226 (2012): 341-360.
[20] Saeedi, M., F. Ajali and M. Mani, .“A comprehensive numerical study of battle damage and repairs upon the aerodynamic characteristics of an aerofoil”. The Aeronautical Journal, 114.1158 (2010): 469-484.
[21] Ki-joon, K., A. Jong-Min, K. Seungkeun, C. Jong-soo,S. Jinyoung, L. Heungsik and H. Gi-bong, “Analysis of partial wing damage on flying-wing unmanned air vehicle”. Journal of aerospace engineering, Part G,228.3 (2014): 355-374.
[22] Ki-joon, K., A. Jong-Min, L. Moonkyou, K. Do-Myung, B. Keuk-hee, L. Heungsik, K. Nakwan, K. Byoung-soo, K. Seungkeun and S. Jinyoung, “Flight test of partial wing damaged flying-wing type UAV”. Asia-Pacific International Symposium on Aerospace Technology,Jeju, Korea, November 13-15, 2012.
[23] Render, P. M., M. Samad-Suhaeb and Zhiyin Yang,“Aerodynamics of battle-damaged finite-aspect-ratio wings”. Journal of Aircraft, 46.3 (2009): 997-1004.
[24] Mi, J., G. J. Nathan and R. E. Luxton, .“Centerline mixing characteristic of jets from nine different shaped nozzles”.Experiments in Fluids, 28 (2000): 93-94.
[25] Abdolahi, S. and M. Mani, “The effect of the damage on the aerodynamic characteristics of wing with respect to the three-dimensional effects”, Aerospace Knowledge and Technology Journal, 4.2 (2015): 7-19.
[26] Johl, G., M.A. Passmore and P.M. Render, “Design methodology and performance of an indraft wind tunnel”.The Aeronautical Journal, 108.1087 (2004): 465-473.
[27] Wilcox, D. C., “Turbulence Modeling for CFD”. Third Edition, 146-157, California: DCW Industries, Inc.,2006.
[28] White, F. M., “Viscous Fluid Flow”. Second Edition,pp. 84-90, New York: McGraw-Hill, 1991.
[29] Anderson, J. D., “Fundamentals of Aerodynamics”.Fifth Edition, pp. 430-438, New York: McGraw-Hill,2010.
Amirkabir Journal of Mechanical Engineering
Volume 49, Issue 1
April 2017
Pages 19-28

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