@inproceedings{5b88724da222401fb21c5127e20df3c1,
title = "Lattice boltzmann study of the geometric effect of a perforated orifice on its damping performance",
abstract = "The present work considers the geometric effect of a perforated orifice on its noise-damping performance by conducting 2D lattice Boltzmann simulations. The damping effect of a rounded orifice is characterized by using power absorption coefficient by applying an acoustically-excited flow consisting of multiple tones. Comparison is then made between the damping performance of the rounded orifice and a square one. It is found that the rounded orifice is associated with lower damping effect than that of the square one. This is due to the different intensity vorticities generated, as visualized in the vortex shedding contours. To gain further insight on the damping mechanism and performance of the orifices, the orifice thickness effect is studied. As the orifice diameter remains constant, the damping performance of the orifices becomes deteriorates in terms of the effective frequency bandwidth with the increased thickness. The present work confirms the effect of the orifice shape and geometry plays an important role in its noise-damping performance.",
keywords = "Acoustic liner, Perforated orifices",
author = "Chenzhen Ji and Dan Zhao and Shihuai Li and Xinyan Li",
year = "2014",
language = "English",
series = "INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control",
publisher = "Australian Acoustical Society",
editor = "John Davy and Marion Burgess and Charles Don and Liz Dowsett and Terry McMinn and Norm Broner",
booktitle = "INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering",
address = "Australia",
note = "43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014 ; Conference date: 16-11-2014 Through 19-11-2014",
}