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Title: Lattice Boltzmann investigation of acoustic damping mechanism and performance of an in-duct circular orifice
Authors: Ji, Chenzhen
Zhao, Dan
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2014
Source: 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.
Series/Report no.: The journal of the acoustical society of America
Abstract: 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.
ISSN: 0001-4966
DOI: 10.1121/1.4876376
Rights: © 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:  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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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