Scientific and Technical Aerospace Reports PDF Download
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Author:
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Category : Aeronautics
Languages : en
Pages : 440
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 440
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Author:
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Category : Aerodynamics
Languages : en
Pages : 46
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Author: Wladimiro Calarese
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Category : Airplanes
Languages : en
Pages : 270
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Book Description
This experiment studies the interaction of vortices shed by the canard and wing's leading edges, and their effect on the aircraft aerodynamic characteristics. A close-coupled canard-wing configuration was selected and tested in different wind tunnels and at different conditions. Tunnel and model size effects, Mach number, angle of attack, and spanwise blowing effects on the vortex interaction were analyzed. Intrusive (hot wires) and non-intrusive (laser doppler velocimeters) data acquisition techniques were used and compared to enhance the reliability of the results. Flow visualization by tufts, oil, and laser light sheets were employed. Mean velocities, vortex turbulence intensities, and Reynolds stresses obtained for different conditions were compared and found to be generally consistent. Mach number, wind tunnel, and model size effects were in general small. Turbulence intensities and stresses increased with angles of attack. Spanwise blowing produced a small favorable effect. The use of a coplanar canard produced a small favorable interaction between the leading edge vortices, while the off-set canard produced a considerable increase in the lift/drag ratio. Keywords: Vortex flow; Subsonic flow; Close-coupled canards; Vortex shedding.
Author:
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Category : Aeronautics
Languages : en
Pages : 1064
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Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
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Category :
Languages : en
Pages : 24
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Author:
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Category : Government publications
Languages : en
Pages : 872
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 884
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Category :
Languages : en
Pages : 1070
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Category : Science
Languages : en
Pages : 930
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Author:
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Category : Government publications
Languages : en
Pages : 868
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