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Interaction of a turbulent-jet noise source with transverse modes in a rectangular ductA turbulent jet was used to excite transverse acoustic modes in a rectangular duct. The pressure spectrum showed asymmetric singularities (pressure spikes) at the resonant frequencies of the duct modes. This validates previously published theoretical results. These pressure spikes occurred over a range of jet velocities, orientations, and inlet turbulence levels. At the frequency of the spike, the measured transverse pressure shape matched the resonant mode shape.
Document ID
19780017106
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Succi, G. P. (MIT Cambridge, Mass., United States)
Baumeister, K. J. (NASA Lewis Research Center Cleveland, OH, United States)
Ingard, K. U. (MIT Cambridge, Mass., United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1978
Subject Category
Aeronautics (General)
Report/Patent Number
NASA-TP-1248
E-9462
Report Number: NASA-TP-1248
Report Number: E-9462
Accession Number
78N25049
Funding Number(s)
PROJECT: RTOP 505-03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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