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Optimized aerodynamic design process for subsonic transport wing fitted with wingletsThe aerodynamic design of a wind-tunnel model of a wing representative of that of a subsonic jet transport aircraft, fitted with winglets, was performed using two recently developed optimal wing-design computer programs. Both potential flow codes use a vortex lattice representation of the near-field of the aerodynamic surfaces for determination of the required mean camber surfaces for minimum induced drag, and both codes use far-field induced drag minimization procedures to obtain the required spanloads. One code uses a discrete vortex wake model for this far-field drag computation, while the second uses a 2-D advanced panel wake model. Wing camber shapes for the two codes are very similar, but the resulting winglet camber shapes differ widely. Design techniques and considerations for these two wind-tunnel models are detailed, including a description of the necessary modifications of the design geometry to format it for use by a numerically controlled machine for the actual model construction.
Document ID
19800005798
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Kuhlman, J. M. (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
September 4, 2013
Publication Date
December 1, 1979
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-159180
Accession Number
80N14054
Funding Number(s)
CONTRACT_GRANT: NSG-1357
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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