ACOUSTIC FIELD OF A POINT SOURCE IN A UNIFORM FLOW FOR TWO GEOMETRIES

1976 ◽  
Author(s):  
ΙΩΑΝΝΗΣ ΣΑΡΡΗΣ
Keyword(s):  
Point Source ◽  
Acoustic Field ◽  
Uniform Flow

High-Frequency Diffraction of a Point Source Field by a Strongly Elongated Elliptic Cylinder

2019 ◽  
Vol 105 (6) ◽  
pp. 912-917
Author(s):  
Ivan V. Andronov
Keyword(s):  
Point Source ◽  
Cross Section ◽  
Acoustic Field ◽  
High Frequency ◽  
Elliptic Cylinder ◽  
Linear Source ◽  
Source Field ◽  
Major Semiaxis

The problem of diffraction of a high-frequency point source acoustic field by an infinite elliptic cylinder with a strongly elongated cross-section is studied. At every direction of propagation, the solution is shown to be similar to those of a linear source field diffraction by a cylinder with correspondingly enlarged major semiaxis.

Green's Functions for the Acoustic Field in Lined Ducts with Uniform Flow

AIAA Journal ◽  
2007 ◽  
Vol 45 (11) ◽  
pp. 2677-2687 ◽  
Author(s):  
Jose S. Alonso ◽  
Ricardo A. Burdisso
Keyword(s):  
Acoustic Field ◽  
Green's Functions ◽  
Green’S Functions ◽  
Uniform Flow ◽  
Lined Ducts

The radiated fields of multipole point sources near a solid spherical surface

1970 ◽  
Vol 43 (3) ◽  
pp. 597-606 ◽  
Author(s):  
Huw G. Davies
Keyword(s):  
Point Source ◽  
Acoustic Field ◽  
Scattered Field ◽  
Spherical Surface ◽  
Solid Sphere ◽  
Incident Field ◽  
Point Sources ◽  
Low Frequencies ◽  
High Frequencies

The acoustic field radiated by a multipole point source positioned near to the surface of a solid sphere is calculated at both low and high frequencies. It is shown that the scattered field at low frequencies is always dipole, but at high frequencies is of the same type as the incident field. The application of the results to the acoustic field radiated by turbulence near a sphere is briefly discussed.

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