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Influence of Large Positive Dihedral on Heat Transfer to Leading Edges of Highly Swept Wings at Very High Mach NumbersA geometric study has been made of some of the effects of dihedral on the heat transfer to swept delta wings. The results of this study show that the incorporation of large positive dihedral on highly swept wings can shift, even at moderately low angles of attack, the stagnation-line heat-transfer problem from the leading edges to the axis of symmetry (ridge line). An order-of-magnitude analysis (assuming laminar flow) indicates conditions for which it may be possible to reduce the heating at the ridge line (except in the vicinity of the wing apex) to a small fraction of the leading-edge heat transfer of a flat wing at the same lift. Furthermore, conditions are indicated where dihedral reduces the leading-edge heat transfer for angles of attack less than those required to shift the stagnation line from the leading edge to the ridge line.
Document ID
19980228316
Acquisition Source
Headquarters
Document Type
Other - NASA Memorandum (MEMO)
Authors
Cooper, Morton (NASA Langley Research Center Hampton, VA United States)
Stainback, P. Calvin (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1959
Subject Category
Aerodynamics
Report/Patent Number
NASA-MEMO-3-7-59L
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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