Aerodynamic Study of Advanced Airship Shapes
Publication: Journal of Aerospace Engineering
Volume 30, Issue 3
Abstract
The present paper reports a numerical study of the aerodynamic properties for a novel disc-shaped airship. Different configurations are considered, some of which present a circular opening connecting the bottom and top surface of the airship. The aim of the study is to understand the flow dynamics, in order to define the aerodynamic efficiency and the stability properties of the flying vehicle. Such information is crucial for the design of the propulsion system and of the mission profile of these innovative airships. Results show that, in general, disc-shaped airships are characterized by large values of drag and small levels of lift. Interestingly, it appears that lift keeps increasing up to very high angles of attack. This feature is found to be related with strong tip effects, which induce a significant flow of air from the high-pressure region at the bottom surface to the low-pressure region at the top surface. This air flow energizes the upper boundary layer, thus contrasting the flow separation on the top surface. This phenomenon is found to be useful for the stability properties of the airship: in fact, it shifts the center of pressure closer to the geometrical center of the airship, hence implying a reduction of the aerodynamic moment. The role of openings is also addressed and found to positively contribute to the stability properties of the airship, by further reducing the levels of aerodynamic moment.
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References
Blanchard, U. (1961). “Landing characteristics of a lenticular-shaped reentry vehicle.”, NASA Langley Research Center, Hampton, VA.
Demele, F., and Brownson, J. (1961a). “Subsonic longitudinal aerodynamic characteristics of disks with elliptic cross sections and thickness-diameter ratios from 0.225 to 0.325.”, NASA Ames Research Center, Moffett Field, CA.
Demele, F., and Brownson, J. (1961b). “Subsonic longitudinal aerodynamic characteristics of disks with elliptic cross sections and thickness-diameter ratios from 0.225 to 0.425.”, NASA Ames Research Center, Moffett Field, CA.
Dumas, A., Anzillotti, S., Madonia, M., and Trancossi, M. (2011a). “Effects of altitude on photovoltaic production of hydrogen.” Proc., 5th Int. Conf. on Energy Sustainability, ASME, Washington, DC, 1365–1374.
Dumas, A., Anzillotti, S., Zumbo, F., and Trancossi, M. (2009). “Photovoltaic stratospheric isle for conversion in hydrogen as energy vector.” J. Aerosp. Eng., 223(6), 769–777.
Dumas, A., Madonia, M., Giuliani, I., and Trancossi, M. (2011c). “Maat cruiser/feeder project: Criticalities and solution guidelines.” SAE, Warrendale, PA.
Dumas, A., Trancossi, M., and Anzillotti, S. (2010). “An airship design methodology based on available solar energy in low stratosphere.” Proc., Int. Mechanical Engineering Congress and Exposition, ASME, Washington, DC, 171–181.
Dumas, A., Trancossi, M., Anzillotti, S., and Madonia, M. (2013). “Photovoltaic production of hydrogen at stratospheric altitude.” J. Sol. Energy Eng., 135(1), 9.
Dumas, A., Trancossi, M., Madonia, M., and Giuliani, I. (2011d). “Multibody advanced airship for transport.” SAE, Warrendale, PA.
Greif, R., and Tolhurst, W. (1963). “Large-scale wind-tunnel tests of a circular plan-form aircraft with a peripheral jet for lift, thrust, and control.”, NASA Ames Research Center, Moffett Field, CA.
Hassan, C. F. (2006). “Disc-shaped aircraft.” Bachelor’s thesis, Dept. of Mechanical Engineering, National Univ. of Singapore, Singapore.
Jackson, C., Jr., and Harris, R., Jr. (1960). “Static longitudinal stability and control characteristics at a mach number of 1.99 of a lenticular-shaped reentry vehicle.”, NASA Langley Research Center, Hampton, VA.
Kornushenko, A., Shustov, A., Lyapunov, S., and Serokhvostov, S. (2007). “Numerical, experimental and flight investigation of MAV aerodynamics.” Proc., European Micro Air Vehicle, Conf. and Flight Competition, EMAV, Delft, Netherlands.
Lazzeroni, F. (1962). “Experimental investigation of a disk-shaped reentry configuration at transonic and low supersonic speeds.”, NASA Ames Research Center, Moffett Field, CA.
Pearson, G. (2002). “Vought’s flying disc.” Wings, 32, 50–55.
Recktenwald, B., Crouse, G., Jr., and Ahmed, A. (2010). “Experimental investigation of a circular-planform concept aircraft.” J. Aircr., 47(3), 887–894.
Rohde, A. (2000). “A computational study of flow around a rotating disc in flight.” Ph.D. thesis, Florida Institute of Technology, Melbourne, FL.
Spearman, M. (1985). “Supersonic aerodynamic characteristics of some reentry concepts for angles of attack up to 90 deg.”, NASA Langley Research Center, Hampton, VA.
Stanford, B., et al. (2007). “Static aeroelastic model validation of membrane micro air vehicle wings.” AIAA J., 45(12), 2828–2837.
Suefuku, H., Hirayama, T., Hirakawa, Y., and Takayama, T. (2010). “Torus-type airship, aiming at high airworthiness quality.” Proc., 27th Int. Congress of the Aeronautical Sciences, ICAS, Bonn, Germany, 143–152.
Ware, G. (1962). “Investigation of the low-subsonic aerodynamic characteristics of a model of a modified lenticular reentry configuration.”, NASA, Washington, DC.
Wayne Keyes, J. (1965). “Aerodynamic characteristics of lenticular and elliptic shaped configurations at a Mach number of 6.”, NASA, Washington, DC.
Weller, H., Tabor, G., Jasak, H., and Fureby, C. (1998). “A tensorial approach to computational continuum mechanics using object-oriented techniques.” Comput. Phys., 12(6), 620–631.
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Information
Published In
Journal of Aerospace Engineering
Volume 30 • Issue 3 • May 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 27, 2015
Accepted: Jul 7, 2016
Published online: Sep 22, 2016
Discussion open until: Feb 22, 2017
Published in print: May 1, 2017
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