Directivity and sound power radiated by a source under a boundary layer
Directivity and sound power radiated by a source under a boundary layer
This paper considers the radiation of sound from compact 2-D or 3-D sources located in an otherwise rigid wall,
bounding a region of fluid flowing parallel to the wall. The sound radiation problem is modeled using a wave number
decomposition. Numerical results show how the radiated power and directivity depend on the freestream flow Mach
number and the thickness of the boundary layer adjacent to the wall. The numerical model is validated by comparing
the sound power and directivity obtained in the limiting case of a thin boundary layer with that obtained from an
alternative analytical model in which the flow is uniform and there is slip at the boundary.
2630-2635
Smith, M.G.
1bc8608d-0178-4793-8f73-46a6c6b9b279
Morfey, C.L.
d5f9a8d0-7d8a-4915-a522-bf49dee111f2
2006
Smith, M.G.
1bc8608d-0178-4793-8f73-46a6c6b9b279
Morfey, C.L.
d5f9a8d0-7d8a-4915-a522-bf49dee111f2
Smith, M.G. and Morfey, C.L.
(2006)
Directivity and sound power radiated by a source under a boundary layer.
AIAA Journal, 44 (11), .
(doi:10.2514/1.19138).
Abstract
This paper considers the radiation of sound from compact 2-D or 3-D sources located in an otherwise rigid wall,
bounding a region of fluid flowing parallel to the wall. The sound radiation problem is modeled using a wave number
decomposition. Numerical results show how the radiated power and directivity depend on the freestream flow Mach
number and the thickness of the boundary layer adjacent to the wall. The numerical model is validated by comparing
the sound power and directivity obtained in the limiting case of a thin boundary layer with that obtained from an
alternative analytical model in which the flow is uniform and there is slip at the boundary.
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Published date: 2006
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Local EPrints ID: 45163
URI: http://eprints.soton.ac.uk/id/eprint/45163
ISSN: 0001-1452
PURE UUID: bd6881b3-a886-40bc-aa6e-35fe8c5f6eac
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Date deposited: 21 Mar 2007
Last modified: 15 Mar 2024 09:09
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Author:
M.G. Smith
Author:
C.L. Morfey
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