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Prediction and Assessment of Reynolds Number Sensitivities Associated with Wing Leading-Edge Radius VariationsThe primary objectives of this study were to expand the data base showing the effects of LE radius distribution and corresponding sensitivity to Rn at subsonic and transonic conditions, and to assess the predictive capability of CFD for these effects. Several key elements led to the initiation of this project: 1) the necessity of meeting multipoint design requirements to enable a viable HSCT, 2) the demonstration that blunt supersonic leading-edges can be associated with performance gain at supersonic speeds , and 3) limited data. A test of a modified Reference H model with the TCA planform and 2 LE radius distributions was performed in the NTF, in addition to Navier-Stokes analysis for an additional 3 LE radius distributions. Results indicate that there is a tremendous potential to improve high-lift performance through the use of a blunt LE across the span given an integrated, fully optimized design, and that low Rn data alone is probably not sufficient to demonstrate the benefit.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Wahls, Richard A.
(NASA Langley Research Center Hampton, VA United States)
Rivers, Melissa B.
(NASA Langley Research Center Hampton, VA United States)
Owens, Lewis R., Jr.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
December 1, 1999
Publication Information
Publication: 1997 NASA High-Speed Research Program Aerodynamic Performance Workshop
Volume: 1
Issue: Part 1
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.
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