An attempt to reduce airfoil tonal noise using fluid-structure interaction

Di Wu, Garret C.Y. Lam, Randolph C.K. Leung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Airfoil tonal noise at low Reynolds number has received lot of attentions due to the increasing interest in micro air vehicles. However, for decade, researchers have spent plenty of efforts to investigate the fundamental mechanism of tonal noise generation rather than its control. In the present paper an attempt to control airfoil tonal noise leveraging the fluid-structure interaction of a flexible panel installed on a NACA0012 airfoil is carried using direct aeroacoustics simulation approach. The airfoil at angle of attack of 5° is immersed in a free stream of Reynolds and Mach numbers equal 5 × 104 and 0.4, respectively. The selection of flexible panel parameters is based on the numerical results of ordinary airfoil. A modified linear stability analysis is employed to study the interaction between instability and the panel response as well as its effect on eventual tonal noise radiation. Comparison of numerical results with and without flexible panel reveals there is a great possibility of tonal noise reduction around 1.3 dB with carefully selected fluid-structure interaction.

Original languageEnglish
Title of host publication2018 AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105609
DOIs
Publication statusPublished - 1 Jan 2018
EventAIAA/CEAS Aeroacoustics Conference, 2018 - Atlanta, United States
Duration: 25 Jun 201829 Jun 2018

Publication series

Name2018 AIAA/CEAS Aeroacoustics Conference

Conference

ConferenceAIAA/CEAS Aeroacoustics Conference, 2018
CountryUnited States
CityAtlanta
Period25/06/1829/06/18

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Aerospace Engineering

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