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acoustic waves in shock tunnels and expansion tubesIt is shown that disturbances in shock and expansion tubes can be modelled as lateral acoustic waves. The ratio of sound speed across the driver-test gas interface is shown to govern the quantity of noise in the test gas. Frequency 'focusing' which is fundamental to centered unsteady expansions is discussed and displayed in centerline pitot pressure measurements.
Document ID
19930061514
Document Type
Conference Paper
Authors
Paull, A.
(NASA Langley Research Center Hampton, VA, United States)
Stalker, R. J.
(Queensland Univ. St. Lucia, Australia)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Shock waves; Proceedings of the 18th International Symposium, Sendai, Japan, July 21-26, 1991. Vol. 1 (A93-45451 19-34)
Subject Category
ACOUSTICS
Funding Number(s)
CONTRACT_GRANT: NAGW-675
Distribution Limits
Public
Copyright
Other