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Calculation of sidewall boundary-layer parameters from rake measurements for the Langley 0.3-meter transonic cryogenic tunnelCorrection of airfoil data for sidewall boundary-layer effects requires a knowledge of the boundary-layer displacement thickness and the shape factor with the tunnel empty. To facilitate calculation of these quantities under various test conditions for the Langley 0.3 m Transonic Cryogenic Tunnel, a computer program was written. This program reads the various tunnel parameters and the boundary-layer rake total head pressure measurements directly from the Engineering Unit tapes to calculate the required sidewall boundary-layer parameters. Details of the method along with the results for a sample case are presented.
Document ID
19870007374
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Murthy, A. V. (Vigyan Research Associates, Inc. Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1987
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-178241
NAS 1.26:178241
Accession Number
87N16807
Funding Number(s)
PROJECT: RTOP 505-61-01-02
CONTRACT_GRANT: NAS1-17919
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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