Finite Element Method Application for the Impedance Eduction Problem on “Interferometer with the Flow” Installations

被引：0
|
作者：
Denisov S.L. [1 ]
Ostrikov N.N. [1 ]
机构：
[1] Acoustic Division, Central Aerohydrodynamic Institute, Moscow oblast, Zhukovsky
来源：
Mathematical Models and Computer Simulations | 2023年 / 15卷 / 3期
基金：
俄罗斯科学基金会;
关键词：
admittance; finite element method (FEM); impedance; interferometer with a flow; liners; sound-absorbing constructions;
D O I：
10.1134/S2070048223030043
中图分类号：
学科分类号：
摘要：
Abstract: This paper uses the finite element method (FEM) to study sound propagation in installations of the “interferometer with the flow” type in order to solve the problem of impedance eduction, taking into account the inhomogeneity of the flow for the two-dimensional and three-dimensional geometries of the installation duct. The propagation of sound in a duct in the presence of a plane-parallel airflow is described by a linearized Euler equation, which is solved by the FEM for the given sound frequency. A comparison of the experimental and calculation results demonstrates the effect of the calculated duct geometry on both the distribution of the sound field and the educed impedance values. © 2023, Pleiades Publishing, Ltd.
引用
收藏
页码：373 / 383
页数：10
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