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vortex lift augmentation by suction on a 60 deg swept gothic wingAn experimental investigation was conducted in the Langley high-speed 7- by 10-foot wind tunnel to determine the aerodynamic performance of suction applied near the wing tips above the trailing edge of a 60 deg swept Gothic wing. Moveable suction inlets were symmetrically mounted in the proximity of the trailing edge, and the amount of suction was varied to maximize wing lift. Tests were conducted at Mach 0.15, 0.30, and 0.45, and the angle of attack was varied from -4 to 50 deg. The suction augmentation increases the lift coefficient over the entire range of angle of attack. The lift improvement exceeds the unaugmented wing lift by over 20%. Moreover, the augmented lift exceeds the lift predicted by vortex lattice theory to 30 deg angle of attack. Suction augmentation is postulated to strengthen the vortex system by increasing its velocity and making it more concentrated. This causes the vortex breakdown to be delayed to a higher angle of attack
Document ID
19820034321
Document Type
Conference Paper
Authors
Taylor, A. H.
(NASA Langley Research Center Hampton, VA, United States)
Jackson, L. R.
(NASA Langley Research Center Hampton, VA, United States)
Huffman, J. K.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 82-0231
Meeting Information
Aerospace Sciences Meeting(Orlando, FL)
Distribution Limits
Public
Copyright
Other