Noise Reduction Mechanisms due to Bio-Inspired Airfoil Designs Bodling, Andrew Sharma, Anupam Sharma, Anupam
dc.contributor.department Aerospace Engineering 2018-11-28T04:05:50.000 2020-06-29T22:45:02Z 2020-06-29T22:45:02Z Sun Jan 01 00:00:00 UTC 2017 2018-11-27 2017-01-01
dc.description.abstract <p>This paper presents numerical analysis of an airfoil geometry inspired by the down coat of the night owl. The objective is to understand the mechanisms of airfoil trailing edge noise reduction that has been observed with such designs in previous experiments. The bioinspired geometry consists of an array of “fences” that are applied near the trailing edge of the NACA-0012 baseline airfoil. Wall-resolved large eddy simulations are performed over the baseline and the bioinspired airfoil geometries and the aeroacoustic performance of the two geometries are contrasted. Both models are simulated at chord-based Reynolds number Re<sub>c</sub> = 5 × 10<sup>5</sup> , flow Mach number, M<sub>∞</sub> = 0.2, and angle of attack, α = 0<sup>◦</sup> . Farfield noise spectra comparisons between the baseline and the bioinspired airfoil near the airfoil trailing edge show reductions with the fences of up to 10 dB. The simulations reveal that the fences lift turbulence eddies away from the airfoil trailing (scattering) edge hence reducing scattering efficiency. These findings suggest that one of the mechanisms of noise reduction is the increased source-scattering edge separation distance.</p>
dc.description.comments <p>This proceeding was published as Bodling, Andrew and Anupam Sharma. "Noise Reduction Mechanisms due to Bio-Inspired Airfoil Designs," In <em>Papers ISROMAC 17</em>, 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC 2017), December 16-21, 2017: Maui, HI. Posted with permission.</p>
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dc.identifier archive/
dc.identifier.articleid 1041
dc.identifier.contextkey 13378404
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_conf/42
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 00:12:45 UTC 2022
dc.source.bitstream archive/|||Sat Jan 15 00:12:47 UTC 2022
dc.subject.disciplines Acoustics, Dynamics, and Controls
dc.subject.disciplines Aerodynamics and Fluid Mechanics
dc.subject.disciplines Structures and Materials
dc.subject.keywords Aeroacoustics
dc.subject.keywords Trailing Edge Noise
dc.subject.keywords Large Eddy Simulations
dc.title Noise Reduction Mechanisms due to Bio-Inspired Airfoil Designs
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 9797e35d-08ee-41c7-8982-c83e6db2ed8e
relation.isOrgUnitOfPublication 047b23ca-7bd7-4194-b084-c4181d33d95d
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