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@inproceedings{Yang:2018:10.2514/6.2018-3932,
author = {Yang, D and Guzman, J and Johnson, H and Morgans, A},
doi = {10.2514/6.2018-3932},
publisher = {AIAA},
title = {On the sensitivity of the acoustics of short circular holes to inletedge geometries},
url = {http://dx.doi.org/10.2514/6.2018-3932},
year = {2018}
}

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TY  - CPAPER
AB  - Short circular holes with a low Mach number mean bias flow passing through them can absorb or generate acoustics.  A recent semi-analytical model (Yang & Morgans, Journal of Sound and Vibration, 384 (2016) pp.  294-311 & 393 (2017) pp.  41-61) based on the Green’s function method has been shown to be able to capture both the acoustic absorption and gen-eration.   The  model  indicates  the  importance  of  accurately  capturing  the  path  of  the  shedvorticity from the hole inlet edge.  In the present work, the effect of this vorticity path on thehole acoustics is first studied systematically using the semi-analytical model.  As the vorticitypath is sensitive to the sharpness of the hole inlet edge, CFD tools are then used to obtain thevortex sheet shape after slightly changing the hole inlet edge shape. The acoustic responses ofthese modified holes are obtained using the semi-analytical model.  A slightly chamfered edge case and a small ellipse edge case are considered to show that a very small change to the shape of the hole inlet edge can give a significant difference in the hole acoustic response.
AU  - Yang,D
AU  - Guzman,J
AU  - Johnson,H
AU  - Morgans,A
DO  - 10.2514/6.2018-3932
PB  - AIAA
PY  - 2018///
TI  - On the sensitivity of the acoustics of short circular holes to inletedge geometries
UR  - http://dx.doi.org/10.2514/6.2018-3932
UR  - http://hdl.handle.net/10044/1/64245
ER  -

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Professor Aimee S. Morgans

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