Aerodynamic noise reduction using a fine grid structure

M. Azarpeyvand*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

In this paper, we study the possibility of reduction of noise produced by turbulent flows using a fine grid structure. Although the concept has been widely used in turbulent flow studies for the purpose of creating homogeneous isotropic turbulent medium, it has never been systematically checked for aerodynamic noise reduction purposes. In this paper we shall confine ourselves to noise reduction of an unheated single-stream high Mach number jet. we shall make use of a RANS k - ε turbulence model along with Lighthill's Acoustic Analogy in order to comprehensively examine this concept. Two different grid geometries located at three positions (6D J, 8.6D J, and 12D J from the jet exit) in a jet shear flow are considered. Results have shown that significant low frequency noise reduction can be achieved when the grid is positioned at the end of the jet potential core.

Original languageEnglish
Title of host publication8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
EditionPART 3
Publication statusPublished - 1 Dec 2009
Event8th European Conference on Noise Control 2009, EURONOISE 2009 - Edinburgh, United Kingdom
Duration: 26 Oct 200928 Oct 2009

Publication series

Name8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
NumberPART 3
Volume31

Conference

Conference8th European Conference on Noise Control 2009, EURONOISE 2009
CountryUnited Kingdom
CityEdinburgh
Period26/10/0928/10/09

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