Noise identification in a hot transonic jet using low-dimensional methods /
Andre M. Hall [and three others].
Description
- Language(s)
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English
- Published
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Arlington, Virginia. : Air Force Office of Scientific Research, 2008.
- Summary
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The goal of this effort has been to identify the dominant source of the radiated aero-acoustic noise produced by high-speed, heated jets and develop control strategies to reduce it. To that end, two acoustically matched Mach 0.6 jets, at temperature ratio Tr=O.93 (cold) and Tr=1.7 (hot) are examined. The use of non-intrusive Particle Image Velocimetry (PIV) to sample the flow, allowed a true measure of the velocity field to be realized without fear of corrupting the radiated noise field intrinsic to each jet. The low-order modal dominance of each was determined using Proper Orthogonal Decomposition (POD), highlighting the low-dimensional nature of this highly turbulent flow field.
- Note
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"March 2008."
"Final Technical Report : January 1, 2005 -- December 31, 2007."
- Physical Description
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62 pages :
illustrations;
28 cm
Viewability
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