Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-28T18:23:46.591Z Has data issue: false hasContentIssue false
  • English
  • Français

A comprehensive numerical study of battle damage and repairs upon the aerodynamic characteristics of an aerofoil

Published online by Cambridge University Press:  03 February 2016

M. Saeedi ,
F. Ajalli  and
M. Mani
M. Saeedi
Affiliation:
[email protected]
F. Ajalli
Affiliation:
Aerospace Research Institute, Tehran, Iran
M. Mani
Affiliation:
Aerospace Engineering Department, Centre of Excellence in Computational Aerospace, Amirkabir University of Technology, Tehran, Iran
Get access Rights & Permissions [Opens in a new window]

Abstract

A NACA 641-412 aerofoil with circle and star damage and also three repair configurations has been numerically investigated. Two different methods of mesh generation were employed: multi structured mesh for the star damaged aerofoil and unstructured mesh for the other aerofoils. The results show that the damage will cause a reduction in lift coefficient of the aerofoil and also a different stall angle relative to that of the undamaged aerofoil. Each kind of repair improves the aerodynamic characteristics of the aerofoil considerably. The flow Field inside the damage hole and the cavity caused by the repair sheets was also investigated. Finally, the numerical solution was qualitatively and quantitatively validated using the available experimental results.

Type
Research Article
Information
The Aeronautical Journal , Volume 114 , Issue 1158 , August 2010 , pp. 469 - 484
Copyright
Copyright © Royal Aeronautical Society 2010 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Jones, R., Assessing and maintaining continued airworthiness in the presence of widespread fatigue damage: an Australian perspective, Engineering Fracture Mechanics, 1998, (60), 1, pp 109–130.Google Scholar
2. Hays, C., Effects of simulated wing damage on the aerodynamic characteristics of swept-wing airplane model, 1968, NASATMX-1550.Google Scholar
3. Blecha, G.C., A compilation of methods and data for drag estimation of fabrication irregularities and protrusions, Rockwell, TFD-70-619, 1979.Google Scholar
4. Betzin, M. and Brown, D.H., Aerodynamic characteristics of an A-4B aircraft with simulated and actual gunfire damage to one wing, 1976, NASA TMX-73119.Google Scholar
5. Leishman, J.G., Aerodynamic characteristic of helicopter rotor aerofoil as affected by simulated ballistic damage, 1993, ARL-CR-66.Google Scholar
6. Irwin, A.J., Render, P.M., McGuirk, J.J., Probert, B. and Alonze, P.M., Initial investigation into aerodynamic properties of a battle damaged wing, 13th AIAA Applied Aerodynamics Conference, AIAA95-1845, June 1995, San Diego, California, USA.Google Scholar
7. Irwin, A.J. and Render, P.M., The influence of internal structure on the aerodynamic characteristics of battle-damaged wings, 14th AIAA Applied Aerodynamics Conference, AIAA96-2395, June 1996, New Orleans, USA.Google Scholar
8. Render, P.M. and Walton, A.J., Aerodynamics of battle damaged wings – the influence of flaps, camber, and repair schemes. 23rd AIAA Applied Aerodynamics Conference, 2005.Google Scholar
9. Mani, M. and Render, P.M., Experimental investigation into aerodynamic characteristics of aerofoils with triangular and star shaped through damage, AIAA-2005-4978, 6-9 June, 2005, 23rd AIAA Applied Aerodynamics Conference, Toronto, Ontario, Canada.Google Scholar
10. Rasi Marzabadi, F., Ajalli, F. and Mani, M., Numerical aerodynamic analysis of a damaged aerofoil, 2007, 25th AIAA Applied Aerodynamics Conference.Google Scholar
11. Rasi Marzabadi, F., Ajalli, F. and Mani, M., Numerical aerodynamic analysis of damage and boundary condition on aerodynamic characteristic of and infinite wing aerofoil, 6th conference of Iranian Aerospace society, Tehran, Iran.Google Scholar
12. Jones, R., Assessing and maintaining continued airworthiness in the presence of wide spread fatigue damage, an Australian perspective, Engineering Fracture Mechanics, 1, (60), 1998, pp 109–130.Google Scholar
13. Ajalli, F., Saeedi, M., Mani, M., Rasi, F. and Beheshti, B., Numerical Analysis of flow structure through the circle damaged infinite wing, 11th Fluid Dynamic Conference, 2008, Khaje Nasir University of Technology, Tehran, Iran.Google Scholar
14. Welburn, S., Battle Damage Repair Techniques (ABDR), Headquarters Logistics Command RAF Wyton, Huntington Cambridgeshire, UK. Damage Assessment and Repair, 25 April 1996.Google Scholar
15. Irwin, A.J. Phd dissertation, Investigation into The Aerodynamic Effects of Simulated Battle Damage to a Wing, Loughborough University, Department of Aeronautical and Automotive Engineering, 1999.Google Scholar
16. Mani, M., Sabbatical leave report, Loughborough University, Department of Aeronautical and Automotive Engineering, 2004–2005.Google Scholar
17. Zdanski, P.S.B., Ortega, M.A. and Fico, N.G.C.R., Numerical study of the flow over shallow cavities, J of Computer and Fluids, 2003.Google Scholar
18. Flunet’s tutorial, Version 6.3.22, 2008.Google Scholar