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High enthalpy, hypervelocity flows of air and argon in an expansion tubeAn expansion tube with a free piston driver has been used to generate quasi-steady hypersonic flows in argon and air at flow velocities in excess of 9 km/s. Irregular test flow unsteadiness has limited the performance of previous expansion tubes, and it has been found that this can be avoided by attention to the interaction between the test gas accelerating expansion and the contact surface in the primary shock tube. Test section measurements of pitot pressure, static pressure and flat plate heat transfer are reported. An approximate analytical theory has been developed for predicting the velocities achieved in the unsteady expansion of the ionizing or dissociating test gas.
Document ID
19910064614
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Neely, A. J
(Queensland Univ. Saint Lucia, Australia)
Stalker, R. J.
(Queensland Univ. Saint Lucia, Australia)
Paull, A.
(Queensland, University Saint Lucia, Australia)
Date Acquired
August 14, 2013
Publication Date
July 1, 1991
Publication Information
Publication: Aeronautical Journal
Volume: 95
ISSN: 0001-9240
Subject Category
Aerodynamics
Accession Number
91A49237
Funding Number(s)
CONTRACT_GRANT: NAGW-674
Distribution Limits
Public
Copyright
Other

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