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prediction of turbulence-generated noise in unheated jetsJeNo (Version 1.0) is a Fortran90 computer code that calculates the far-field sound spectral density produced by axisymmetric, unheated jets at a user specified observer location and frequency range. The user must provide a structured computational grid and a mean flow solution from a Reynolds-Averaged Navier Stokes (RANS) code as input. Turbulence kinetic energy and its dissipation rate from a k-epsilon or k-omega turbulence model must also be provided. JeNo is a research code, and as such, its development is ongoing. The goal is to create a code that is able to accurately compute far-field sound pressure levels for jets at all observer angles and all operating conditions. In order to achieve this goal, current theories must be combined with the best practices in numerical modeling, all of which must be validated by experiment. Since the acoustic predictions from JeNo are based on the mean flow solutions from a RANS code, quality predictions depend on accurate aerodynamic input.This is why acoustic source modeling, turbulence modeling, together with the development of advanced measurement systems are the leading areas of research in jet noise research at NASA Glenn Research Center.
Document ID
20090020362
Document Type
Technical Memorandum (TM)
Authors
Khavaran, Abbas
(ASRC Aerospace Corp. Cleveland, OH, United States)
Wolter, John D.
(NASA Glenn Research Center Cleveland, OH, United States)
Koch, L. Danielle
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
April 1, 2009
Subject Category
Aircraft Propulsion and Power
Report/Patent Number
NASA/TM-2009-213827/PART2
E-16951
Funding Number(s)
WBS: WBS 984754.02.07.03.17.02
Distribution Limits
Public
Copyright
Public Use Permitted.

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