CUED Publications database

Aerodynamic noise from a poroelastic trailing edge with implications for the silent flight of owls

Jaworski, JW and Peake, N (2012) Aerodynamic noise from a poroelastic trailing edge with implications for the silent flight of owls. 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference).

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Abstract

The interaction of a turbulent eddy with a semi-infinite, poroelastic edge is examined with respect to the effects of both elasticity and porosity on the efficiency of scattered aerodynamic noise. The scattering problem is solved using the Wiener-Hopf technique for constant plate properties to identify their scaling dependence on the resulting aerodynamic noise, including the dependence on flight velocity, where special attention is paid to the limiting cases of rigid, porous and elastic, impermeable plate conditions. Results from these analyses attempt to address how trailing edge noise may be mitigated by porosity and seek to deepen the understanding of how owls hunt in acoustic stealth. © 2012 by Justin W. Jaworski and Nigel Peake. Published by the American Institute of Aeronautics and Astronautics, Inc.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:11
Last Modified: 08 Dec 2014 02:18
DOI: