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Scattering of coherent sound waves by atmospheric turbulenceAn analytical study of the propagation of coherent sound waves through an atmosphere containing both mean and fluctuating flow variables is presented. The general flow problem is formulated as a time-dependent wave propagation in a half-space containing the turbulent medium. The coherent acoustic waves are analyzed by a smoothing technique, assuming that mean flow variables vary with the height only. The general equations for the coherent waves are derived, and then applied to two special cases, corresponding to uniform and shear mean flow, respectively. The results show that mean shear and turbulence introduce pronounced effects on the propagation of coherent acoustic disturbances.
Document ID
19750041735
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chow, P. L.
(Wayne State University Detroit, Mich., United States)
Liu, C. H.
Maestrello, L.
(NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1975
Subject Category
Acoustics
Report/Patent Number
AIAA PAPER 75-545
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aero-Acoustics Conference
Location: Hampton, VA
Start Date: March 24, 1975
End Date: March 26, 1975
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
75A25807
Distribution Limits
Public
Copyright
Other

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