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Aerodynamic and Acoustic Parameters of a Coandã Flow – a Numerical Investigation

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Author(s): Valeriu Drãgan

Journal: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies
ISSN 2228-9860

Volume: 3;
Issue: 1;
Start page: 75;
Date: 2012;
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Keywords: Coanda effect | Aerodynamics | Acoustics | Computational Fluid Dynamics

ABSTRACT
Coandã flows have been the study of aircraft designers primarily for the prospect of achieving higher lift coefficient wings. Recently the environmental problem of noise pollution attracted further interest on the matter. The approach used is numerical; the computations were made using a large eddy simulation (LES) technique coupled with a Ffowcs-Williams-Hawkings (FWH) acoustic analysis. The spectrum of the flow was measured at three locations in the vicinity of the ramp showing that the low frequency region is dominant. The findings may be used as reference for the development of quiet aircraft that use super-circulation, as it is the case with the Upper Surface Blown (USB) configurations.
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