Noise identification in a hot transonic jet using low-dimensional methods /
Andre M. Hall [and three others].

Description

Main Author

Hall, André M.

Related Names

Ukeiley, Lawrence, author.
Glauser, Mark N., author.
Pinier, Jeremy T., author.
Syracuse University. Department of Mechanical and Aerospace Engineering
United States. Air Force.

Language(s)

English

Published

Arlington, Virginia. : Air Force Office of Scientific Research, 2008.

Subjects

Computational fluid dynamics.
Jet planes > Jet planes / Noise.

Summary

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

"March 2008."
"Final Technical Report : January 1, 2005 -- December 31, 2007."

Physical Description

62 pages : illustrations; 28 cm

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