Aerodynamics of Blended Wing Body (BWB) Unmanned Aerial Vehicle (UAV) Using Computational Fluid Dynamics (CFD)
Aman Mohd Ihsan Mamat, Rizal Effendy Mohd Nasir,
Wahyu Kuntjoro Wirachman Wisnoe, Zulkiflee Ngah & Ramzyzan Ramly
Faculty of Mechanical Engineering, Universiti Teknologi MARA
40450 Shah Alam, Selangor Malaysia
ph: +60 3 55436268, fax: +60 3 55435160
ABSTRACT
A thorough understanding of the aerodynamic behaviour of Blended Wing Body (BWB) aircraft is important because of its high lift to drag ratio. The use of Computational Fluids Dynamics (CFD) has accelerated aerodynamic analysis of BWB aircraft. Steady-state, three-dimensional CFD calculations were made of the BWB model using the Spalart-Allmaras turbulence model.Comparisons of aerodynamic characteristics such as lift coefficient, drag coefficient, pitching moment coefficient, pressure contours and Mach number contours were made both of two-dimensional aerofoil sections in the BWB model and a complete three-dimensional model. The lift coefficient distributions along the body and wing span were analyzed. The effect of changing the angles of attack and aerofoil profiles were investigated. The BWB design presented here has achieved an unprecedented capability in terms of sustainability of flight at high angle of attack, low parasite drag coefficient, efficient thrust required at optimum flight speed and acceptable margin of centre of gravity for trimmed flight at optimum speed without control surface interference.
Keywords: Aerodynamics, Subsonic, Unmanned Aerial Vehicle, Computational Fluids Dynamics
References
[1] Qin, N., Vavalle, A., Le Moigne, A., Laban, M., Hackett, K., Weinnerfelt, P.(2004). “Aerodynamic considerations of blended wing body aircraft” in Progress in Aerospace Science, 321-343.
[2] Anderson, J. D. (1989). Introduction to Flights, 3rd ed., McGraw-Hill, New York.
[3] Clancy, L. J. (1993). Aerodynamics, Pitman, Massachussets.
[4] Engels, H., Becker, W., Morris, A. (2004). “Implementaion of a multi-level methodology within the e-design of a blended wing body” in Aerospace Science and Technology, 145-153.
[5] By Österheld, C., Heinze W., Horst P., “Preliminary Design of A Blended Wing Body Configuration Using The Design Tool PrADO.”
[6] Johnson, D. (1st June 2005). Arado AR Projekt I: Arado AR E.555 Series, [WWW] http://www.luft46.com/arado/are555s.html.
[7] Bergenson, P., Flying Wings: Jack Northrop (1895 – 1981), [WWW] http://www.ctie.monash.edu.au/hargrave/northrop.html, 1st June 2005.
[8] Federation of American Scientist (FAS), B-2 Spirit, [WWW], http://www.fas.org/nuke/guide/usa/bomber/b-2.htm, 1st June 2005.Bab 2.
[9] By Wakayama, S., Kroo I. (1998). “The Challenge of Blended-Wing BodyOptimization,” AIAA Paper 98-4736.
[10] Vos, J. B., Rizzi, A., Darracq, D., Hirschel, E. H. (2002). “Navier-Stokes solvers in European aircraft design”, in Progress in Aerospace Sciences, 601-697.
[11] NASA Langley X-48 BWB Unmanned Combat Aerial Vehicle, [WWW] http://www.globalsecurity.org/military/systems/aircraft/x-48.htm, 28th May 2005.
[12] Mateescu, D., Abdo, M. (2005). “Efficient second-order analytical solutions for airfoils in subsonic flows” in Aerospace Science and Technology, 101-115.
Aerodynamics of Blended Wing Body (BWB) Unmanned Aerial Vehicle (UAV) Using ...
