Weapons bay acoustic suppression using a novel rod in crossflow configuration
by Lackey, Shane, M.S.E., THE UNIVERSITY OF ALABAMA IN HUNTSVILLE, 2010, 116 pages; 1486900

Abstract:

A computational fluid dynamic study was performed to analyze the efficacy of a novel acoustic suppression device for high Mach number cavity flow. A clean cavity computational model was first qualitatively validated based upon recorded data and was shown to agree well with experimental results for overall sound pressure levels. The proposed configuration, consisting of a rod in crossflow over the leading edge of the cavity with a forty-five degree rod fence placed upstream of the cavity, was then inserted into the computational model to test for a quantitative reduction in sound pressure level. A reduction of approximately 8 decibels was observed with the proposed configuration. A parametric study of each component of the configuration was also evaluated in an attempt to isolate the reduction mechanism.

 
AdviserBrian Landrum
SchoolTHE UNIVERSITY OF ALABAMA IN HUNTSVILLE
SourceMAI/ 49-03, p. , Nov 2010
Source TypeThesis
SubjectsAerospace engineering; Mechanical engineering
Publication Number1486900
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