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Comparison of supercritical and conventional wing flutter characteristicsA wind-tunnel study is described in which it was attempted to compare the measured flutter boundaries of two dynamically similar aeroelastic models with identical planform, maximum thickness-to-chord ratio, and as nearly identical stiffness and mass distributions as possible, but with one wing having a supercritical airfoil and the other a conventional one. At subsonic Mach numbers, the flutter boundary for the supercritical wing was above that of the conventional wing, as predicted by flutter calculations using subsonic lifting theory. In the transonic region, however, the supercritical wing boundary decreases more rapidly and the minimum flutter point occurs at a dynamic pressure below the conventional wing boundary. Airfoil shape effects may account for some of the difference in the flutter boundaries of the two airfoils.
Document ID
19760047098
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Farmer, M. G.
(NASA Langley Research Center Hampton, VA, United States)
Hanson, P. W.
(NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Structural Mechanics
Meeting Information
Meeting: Structures, Structural Dynamics, and Materials Conference
Location: King of Prussia, PA
Start Date: May 5, 1976
End Date: May 7, 1976
Accession Number
76A30064
Distribution Limits
Public
Copyright
Other

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