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Flexiwall 3 SO: A second order predictive strategy for rapid wall adjustment in two-dimensional compressible flowAn improvement is presented for the 2-D strategies for adjustment of the flexible top and bottom walls of an Adaptive (Wind Tunnel) Wall Test Section (AWTS). This adjustment is part of the wall adaptation process to eliminate top and bottom wall interference at the source. The improvements to account for second order effects are described in mathematical detail. It is intended that these improvements should further minimize the necessary iterations in the wall adaptation process. An associated computer program written in BASIC is presented and several test cases run with this program are discussed. The strategy performs well for a theoretical test case but when applied to experimental AWTS data some discrepancies in the adapted wall shapes are found.
Document ID
19880012634
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Goodyer, M. J. (Southampton Univ.)
Judd, Michael (Southampton Univ.)
Date Acquired
September 5, 2013
Publication Date
July 1, 1981
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-181662
NAS 1.26:181662
Accession Number
88N22018
Funding Number(s)
CONTRACT_GRANT: NSG7-172
PROJECT: RTOP 505-61-01-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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