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Noise Radiation from Single and Multiple Rod ConfigurationsAcoustic measurements were performed on single and multiple rod configurations to study the effect of Reynolds number, surface roughness, freestream turbulence, proximity and wake interference on the radiated noise. The Reynolds number ranged from 3.8 x 10(exp 3) to 10(exp 5). Directivity measurements were performed to determine how well the dipole assumption for the radiation of vortex shedding noise holds for the different model configurations tested. The dependence of the peak Sound Pressure Level on velocity was also examined. Several concepts for the reduction of the noise radiating from cylindrical rods were tested. It was shown that wire wraps and collar distributions could be used to significantly reduce the noise radiating from rods in tandem configurations.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Hutcheson, Florence V.
(NASA Langley Research Center Hampton, VA, United States)
Brooks, Thomas F.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 7, 2013
Publication Date
May 1, 2006
Subject Category
Report/Patent Number
AIAA Paper-2006-2629
Meeting Information
Meeting: 12th AIAA/CEAS Aeroacoustics Conference
Location: Cambridge, MA
Start Date: May 8, 2006
End Date: May 10, 2006
Sponsors: National Oceanic and Atmospheric Administration, American Inst. of Aeronautics and Astronautics
Funding Number(s)
OTHER: 23-781-10-09
Distribution Limits
Work of the US Gov. Public Use Permitted.
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