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A review of sphere drag coefficients applicable to atmospheric density sensingA comprehensive search has been performed on the drag coefficient of spheres in the Reynolds number range from 50 to 50,000 and for Mach numbers up to 5. This Reynolds-Mach number range corresponds to the range of interest in the falling sphere technique of atmospheric sensing. In this technique, the knowledge of the sphere's trajectory and its aerodynamic characteristics are utilized to obtain the density of the atmosphere. Presently available data have been collected and analyzed as to their validity and applicability to atmospheric density measurements. A new drag table is recommended for use in these measurements.
Document ID
19720017345
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Krumins, M. V. (Naval Ordnance Lab. Silver Spring, MD, United States)
Date Acquired
August 6, 2013
Publication Date
January 18, 1972
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-126742
NOLTR-72-34
Accession Number
72N24995
Funding Number(s)
CONTRACT_GRANT: NASA ORDER L-43531
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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