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Type: Journal article
Title: The effect of acoustic forcing on an airfoil tonal noise mechanism
Author: Schumacher, K.
Doolan, C.
Kelso, R.
Citation: Journal of the Acoustical Society of America, 2014; 136(2):EL78-EL83
Publisher: Acoustical Society of America
Issue Date: 2014
ISSN: 0001-4966
Statement of
Karn L. Schumacher, Con J. Doolan, and Richard M. Kelso
Abstract: The response of the boundary layer over an airfoil with cavity to external acoustic forcing, across a sweep of frequencies, was measured. The boundary layer downstream of the cavity trailing edge was found to respond strongly and selectively at the natural airfoil tonal frequencies. This is considered to be due to enhanced feedback. However, the shear layer upstream of the cavity trailing edge did not respond at these frequencies. These findings confirm that an aeroacoustic feedback loop exists between the airfoil trailing edge and a location near the cavity trailing edge.
Rights: © 2014 Acoustical Society of America
RMID: 0030007850
DOI: 10.1121/1.4885485
Appears in Collections:Mechanical Engineering publications

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