TY - GEN
T1 - Aerodynamic noise reduction using a fine grid structure
AU - Azarpeyvand, M.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84864691241&partnerID=8YFLogxK
M3 - Conference Contribution (Conference Proceeding)
AN - SCOPUS:84864691241
SN - 9781615676804
T3 - 8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
BT - 8th European Conference on Noise Control 2009, EURONOISE 2009 - Proceedings of the Institute of Acoustics
T2 - 8th European Conference on Noise Control 2009, EURONOISE 2009
Y2 - 26 October 2009 through 28 October 2009
ER -