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Modeling and control study of the NASA 0.3-meter transonic cryogenic tunnel for use with sulfur hexafluoride mediumThe NASA Langley 0.3-m Transonic Cryogenic Tunnel is to be modified to operate with sulfur hexafluoride gas while retaining its present capability to operate with nitrogen. The modified tunnel will provide high Reynolds number flow on aerodynamic models with two different test gases. The document details a study of the SF6 tunnel performance boundaries, thermodynamic modeling of the tunnel process, nonlinear dynamical simulation of math model to yield tunnel responses, the closed loop control requirements, control laws, and mechanization of the control laws on the microprocessor based controller.
Document ID
19930007190
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Balakrishna, S. (Vigyan Research Associates, Inc. Hampton, VA, United States)
Kilgore, W. Allen (Vigyan Research Associates, Inc. Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-189737
NAS 1.26:189737
Accession Number
93N16379
Funding Number(s)
CONTRACT_GRANT: NAS1-18585
PROJECT: RTOP 505-59-86-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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