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Calculations of Interaction of Acoustic Waves with a Two- Dimensional Free Shear Layer

Koshigoe, S. and Culick, F. E. C. (1985) Calculations of Interaction of Acoustic Waves with a Two- Dimensional Free Shear Layer. AIAA Papers, AIAA 85-0043. American Institute of Aeronautics and Astronautics . http://resolver.caltech.edu/CaltechAUTHORS:20101208-072047856

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Abstract

The acoustic/vortical interaction in a twodimensional free shear layer has been studied. The flowfield is represented by division into two parts: the vortical and the compressible flows. Each field is treated separately and linked with the other through the Bernoulli enthalpy. Acoustic waves are identified as unsteady compressible motions free of vorticity. Calculations have been carried out for the flowfields with and without externally imposed disturbances. Preliminary results reported here indicate that the motion of large coherent flow structures contributes significantly to sound generation. In particular, the formation of large structure and subsequent pairing appear globally as a quadrupole source.


Item Type:Report or Paper (Report)
Additional Information:© 1985, AIAA. This paper is declared a work of the U.S. Government and therefore is in the public domain. This work contains some results obtained from the research program supported partly by the Naval Weapons Center, partly by the California Institute of Technology, and partly by NAVAIR, Contract No. N0014-84-K-0434.
Group:Guggenheim Jet Propulsion Center
Funders:
Funding AgencyGrant Number
Naval Weapons CenterUNSPECIFIED
CaltechUNSPECIFIED
NAVAIRN00014-84-K0434
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion CenterUNSPECIFIED
AIAA85-0043
Record Number:CaltechAUTHORS:20101208-072047856
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101208-072047856
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21224
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Dec 2010 22:53
Last Modified:26 Dec 2012 12:44

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