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Sheared wing-tip aerodynamics - Wind-tunnel and computational investigationComputational and experimental performance benefits are presented for a high-aspect-ratio unswept wing configuration with sheared tips. The sheared tip is a highly swept and highly tapered surface located in the same plane as the inboard wing panel to which it is attached. The compuational results were obtained with an inviscid surface panel method that models the nonlinear influence of the trailing wake. Both wind-tunnel and calculated results were obtained for a 12-ft span wing model with various wing-tip configurations. The computational and experimental data are in fair agreement and demonstrate that sheared wing tips can reduce induced drag at cruise and climb lift coefficients. The drag reduction is the result of wake deformation effects and changes in spanwise load distribution. Wind-tunnel measured longitudinal and lateral directional stability characteristics are also presented for the various wing-tip layouts.
Document ID
19890041791
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Vijgen, P. M. H. W.
(High Technology Corp. Hampton, VA, United States)
Van Dam, C. P.
(California, University Davis, United States)
Holmes, B. J.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1989
Publication Information
Publication: Journal of Aircraft
Volume: 26
ISSN: 0021-8669
Subject Category
Aerodynamics
Accession Number
89A29162
Distribution Limits
Public
Copyright
Other

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