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Preliminary study of the effect of the turbulent flow field around complex surfaces on their acoustic characteristicsFairly extensive measurements have been conducted of the turbulent flow around various surfaces as a basis for a study of the acoustic characteristics involved. In the experiments the flow from a nozzle was directed upon various two-dimensional surface configurations such as the three-flap model. A turbulent flow field description is given and an estimate of the acoustic characteristics is provided. The developed equations are based upon fundamental theories for simple configurations having simple flows. Qualitative estimates are obtained regarding the radiation pattern and the velocity power law. The effect of geometry and turbulent flow distribution on the acoustic emission from simple configurations are discussed.
Document ID
19780061220
Document Type
Conference Paper
Authors
Olsen, W. A. (NASA Lewis Research Center Cleveland, OH, United States)
Boldman, D. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
July 1, 1978
Subject Category
ACOUSTICS
Report/Patent Number
AIAA PAPER 78-1123
Meeting Information
Fluid and Plasma Dynamics Conference(Seattle, WA)
Distribution Limits
Public
Copyright
Other