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Free-molecule-flow force and moment coefficients of the aeroassist flight experiment vehicleCalculated results for the aerodynamic coefficients over the range of + or - 90 deg in both pitch and yaw attitude angles for the Aeroassist Flight Experiment (AFE) vehicle in free molecule flow are presented. The AFE body is described by a large number of small flat plate surface elements whose orientations are established in a wind axes coordinate system through the pitch and yaw attitude angles. Lift force, drag force, and three components of aerodynamic moment about a specified point are computed for each element. The elemental forces and moments are integrated over the entire body, and total force and moment coefficients are computed. The coefficients are calculated for the two limiting gas-surface molecular collision conditions, namely, specular and diffuse, which assume zero and full thermal accommodation of the incoming gas molecules with the surface, respectively. The individual contribution of the shear stress and pressure terms are calculated and also presented.
Document ID
19890015753
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Blanchard, Robert C. (Exeter Univ. (England). Hampton, VA., United States)
Hinson, Edwin W. (ST Systems Corp.)
Date Acquired
September 5, 2013
Publication Date
July 1, 1989
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-101600
NAS 1.15:101600
Accession Number
89N25124
Funding Number(s)
PROJECT: RTOP 583-01-11-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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