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Drag measurements in tubular structure elements. Part 3: Effect of diameter and surface structure on the drag of cylindrical tubesMeasurements on five cylinders with different surfaces show that the supercritical drag coefficient tends to 0.5 for smooth cylinders with maximum critical Re number 4.16 times 10 to the -5 power and to 0.6 for point pattern surfaces with Re number reduced to 2.16 times 10 to the -5 power. For the other surfaces, with increasing roughness the critical Re number decrease while both minimum supercritical drag coefficients increase.
Document ID
19830008011
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Schulz, G. (NASA Headquarters Washington, DC United States)
Hayn, F. (NASA Headquarters Washington, DC United States)
Date Acquired
September 4, 2013
Publication Date
July 1, 1982
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-76937
NAS 1.15:76937
DVL-1-NK-1-68-34
Accession Number
83N16282
Funding Number(s)
CONTRACT_GRANT: NASW-3541
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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