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Some Aspects of the Modified Newtonian and Prandtl-Meyer-Expansion Method for Axisymmetric Blunt Bodies at Zero Angle of AttackIn a recent article on hypersonic flow, Lees and Kubota suggested a modification of the local-expansion method to predict the surface pressures in the region of a nose-cylinder junction where Newtonian theory fails. The modification consists of matching the Newtonian pressure distribution and the Prandtl-Meyer relation at the point on the nose surface where both the pressure and the pressure gradient, predicted by these two solution, are equal. With this approximation, the pressure distribution can be predicted quite accurately up to the nose-cylinder junction for blunt-nosed bodies of continuous curvature, provided centrifugal-force effects are negligible. The purpose of this note is to facilitate the application of Lees' suggestion and to draw attention to some of its consequences.
Document ID
20150021144
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wagner, Richard D., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
November 12, 2015
Publication Date
July 14, 1959
Publication Information
Publication: Journal of Aerospace Sciences
Volume: 26
Issue: 12
Subject Category
Aerodynamics
Fluid Mechanics And Thermodynamics
Distribution Limits
Public
Copyright
Other

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