Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice

In this work, three-dimensional numerical simulations of acoustically excited flow through a millimeter-size circular orifice are conducted to assess its noise damping performance, with particular emphasis on applying the lattice Boltzmann method (LBM) as an alternative computational aeroacoustics t...

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Main Authors: Ji, Chenzhen, Zhao, Dan
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/104656
http://hdl.handle.net/10220/20275
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1046562023-03-04T17:17:43Z Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice Ji, Chenzhen Zhao, Dan School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering In this work, three-dimensional numerical simulations of acoustically excited flow through a millimeter-size circular orifice are conducted to assess its noise damping performance, with particular emphasis on applying the lattice Boltzmann method (LBM) as an alternative computational aeroacoustics tool. The model is intended to solve the discrete lattice Boltzmann equation (LBE) by using the pseudo-particle based technique. The LBE controls the particles associated with collision and propagation over a discrete lattice mesh. Flow variables such as pressure, density, momentum, and internal energy are determined by performing a local integration of the particle distribution at each time step. This is different from the conventional numerical investigation attempting to solve Navier-Stokes (NS) equations by using high order finite-difference or finite-volume methods. Compared with the conventional NS solvers, one of the main advantages of LBM may be a reduced computational cost. Unlike frequency domain simulations, the present investigation is conducted in time domain, and the orifice damping behavior is quantified over a broad frequency range at a time by forcing an oscillating flow with multiple tones. Comparing the numerical results with those obtained from the theoretical models, large eddy simulation, and experimental measurements, good agreement is observed. Published version 2014-08-14T04:54:15Z 2019-12-06T21:37:03Z 2014-08-14T04:54:15Z 2019-12-06T21:37:03Z 2014 2014 Journal Article Ji, C., & Zhao, D. (2014). Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice. The Journal of the Acoustical Society of America, 135(6), 3243-3251. 0001-4966 https://hdl.handle.net/10356/104656 http://hdl.handle.net/10220/20275 10.1121/1.4876376 en The journal of the acoustical society of America © 2014 Acoustical Society of America. This paper was published in The Journal of the Acoustical Society of America and is made available as an electronic reprint (preprint) with permission of Acoustical Society of America. The paper can be found at the following official DOI: http://dx.doi.org/10.1121/1.4876376.  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering
spellingShingle DRNTU::Engineering::Mechanical engineering
Ji, Chenzhen
Zhao, Dan
Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
description In this work, three-dimensional numerical simulations of acoustically excited flow through a millimeter-size circular orifice are conducted to assess its noise damping performance, with particular emphasis on applying the lattice Boltzmann method (LBM) as an alternative computational aeroacoustics tool. The model is intended to solve the discrete lattice Boltzmann equation (LBE) by using the pseudo-particle based technique. The LBE controls the particles associated with collision and propagation over a discrete lattice mesh. Flow variables such as pressure, density, momentum, and internal energy are determined by performing a local integration of the particle distribution at each time step. This is different from the conventional numerical investigation attempting to solve Navier-Stokes (NS) equations by using high order finite-difference or finite-volume methods. Compared with the conventional NS solvers, one of the main advantages of LBM may be a reduced computational cost. Unlike frequency domain simulations, the present investigation is conducted in time domain, and the orifice damping behavior is quantified over a broad frequency range at a time by forcing an oscillating flow with multiple tones. Comparing the numerical results with those obtained from the theoretical models, large eddy simulation, and experimental measurements, good agreement is observed.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Ji, Chenzhen
Zhao, Dan
format Article
author Ji, Chenzhen
Zhao, Dan
author_sort Ji, Chenzhen
title Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
title_short Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
title_full Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
title_fullStr Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
title_full_unstemmed Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
title_sort lattice boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
publishDate 2014
url https://hdl.handle.net/10356/104656
http://hdl.handle.net/10220/20275
_version_ 1759856044071190528