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The large-scale organized structure in free turbulent shear flow and its radiation propertiesModeling of the large-scale coherent structures in a turbulent free shear flow is described. The objective is to gain insight into the interaction between the large-scale structure and the fine-grained turbulence. Some aerodynamic sound radiation properties of the large-scale structure are examined. It is found that the dominant contributions to the radiation come from shear noise rather than self-noise. The fact that a pure tone excitation leads to broadband amplification is most probably due to the enhancement of the fine-grained turbulence by the coherent structure. Numerical modeling of the coherent structure is also discussed.
Document ID
19790029157
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Liu, J. T. C.
(Brown Univ. Providence, RI, United States)
Alper, A.
(Brown Univ. Providence, RI, United States)
Mankbadi, R.
(Brown University Providence, R.I., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Acoustics
Meeting Information
Meeting: In: Structure and mechanisms of turbulence II; Proceedings of the Symposium on Turbulence
Location: Berlin
Start Date: August 1, 1977
End Date: August 5, 1977
Accession Number
79A13170
Funding Number(s)
CONTRACT_GRANT: N00014-76-C-0363
CONTRACT_GRANT: NSF ENG-73-04104
CONTRACT_GRANT: NSF ENG-76-24585
CONTRACT_GRANT: NSG-1076
Distribution Limits
Public
Copyright
Other

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