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Further Investigation of Acoustic Propagation Codes for Three-Dimensional GeometriesThe ability to predict fan noise within complex three-dimensional aircraft engine nacelle geometries is a valuable tool in designing and assessing low-noise concepts. This work begins a systematic study to identify the areas of the design space in which propagation codes of varying fidelity may be used effectively to provide efficient design and assessment. An efficient lower-fidelity code is used in conjunction with two higher-fidelity, more computationally intensive methods to solve benchmark problems of increasing complexity. The codes represent a small sampling of the current propagation codes available or under development. Results of this initial study indicate that the lower-fidelity code provides satisfactory results for cases involving low to moderate attenuation rates, whereas, the two higher-fidelity codes perform well across the range of problems.
Document ID
20060013459
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Nark, Douglas M. (NASA Langley Research Center Hampton, VA, United States)
Watson, Willie R. (NASA Langley Research Center Hampton, VA, United States)
Jones, Michael G. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2006
Subject Category
Aerodynamics
Report/Patent Number
AIAA Paper 2006-2586
Meeting Information
Meeting: 12th AIAA/CEAS Aeroacoustics Conference
Location: Cambridge, MA
Country: United States
Start Date: May 8, 2006
End Date: May 10, 2006
Sponsors: American Inst. of Aeronautics and Astronautics, National Oceanic and Atmospheric Administration
Funding Number(s)
OTHER: 23-781-30-14
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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