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On Blockage Corrections for Two-dimensional Wind Tunnel Tests Using the Wall-pressure Signature MethodThe Wall-Pressure Signature Method for correcting low-speed wind tunnel data to free-air conditions has been revised and improved for two-dimensional tests of bluff bodies. The method uses experimentally measured tunnel wall pressures to approximately reconstruct the flow field about the body with potential sources and sinks. With the use of these sources and sinks, the measured drag and tunnel dynamic pressure are corrected for blockage effects. Good agreement is obtained with simpler methods for cases in which the blockage corrections were about 10% of the nominal drag values.
Document ID
19870018184
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Allmaras, S. R. (Massachusetts Inst. of Tech. Cambridge., United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1986
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.15:86759
A-86267
NASA-TM-86759
Accession Number
87N27617
Funding Number(s)
PROJECT: RTOP 505-31-01-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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