On the mechanisms of noise reduction in aerofoil-turbulence interaction by using wavy leading edges

J. W. Kim, S. Haeri, P. F. Joseph

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel aerofoil leading-edge pro_le based on wavy (sinusoidal) protuberances/tubercles is investigated numerically to understand its e_ectiveness for the reduction of aerofoil-turbulence interaction noise. Non-lifting at-plate aerofoils with straight and wavy leading edges (denoted by SLE and WLE, respectively) are employed and subjected to an impinging turbulence that is synthetically generated in the upstream zone. A full three-dimensional Euler (inviscid) simulations are performed for this study in order to avoid developing self-noise due to viscosity. The free-stream Mach number is set to 0.24. A high-order accurate _nite-di_erence based solver and artefact-free boundary conditions are used in the current simulations. Various frequency-spectra and statistical analysis are implemented in order to investigate and understand the noise reduction mechanisms.

Original languageEnglish
Title of host publication21st AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN (Print)9781624103674
DOIs
Publication statusPublished - 18 Jun 2015
Event21st AIAA/CEAS Aeroacoustics Conference, 2015 - Dallas, United States
Duration: 22 Jun 201526 Jun 2015

Publication series

Name21st AIAA/CEAS Aeroacoustics Conference

Conference

Conference21st AIAA/CEAS Aeroacoustics Conference, 2015
Country/TerritoryUnited States
CityDallas
Period22/06/1526/06/15

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