扩展亥姆霍兹谐振腔声线性阻抗模型在时域CAA中的新实现

Q1 Mathematics

Journal of Computational Acoustics Pub Date : 2016-03-22 DOI:10.1142/S0218396X15500150

L. Pascal, E. Piot, G. Casalis

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引用次数: 9

摘要

墙体声学衬里的应用是降低飞机发动机噪声的一个重要因素。扩展亥姆霍兹谐振器(EHR)阻抗模型由于能在很宽的频率范围内代表实际衬里的行为而得到了广泛的应用。它在z变换的时域CAA方法中的应用已经成为几篇论文的主题。与时域CAA中的标准线性模型(包括对空腔和衬垫穿孔板施加边界条件)相比，另一种方法是将空腔添加到计算域中，并在这些空腔和管道域之间施加条件来对电阻片进行建模。然而，原始方法可能不适用于宽带声学，因为它实现了具有频率无关电阻的阻抗条件。本文描述了该方法的扩展，在时域CAA方法中实现EHR阻抗模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A New Implementation of the Extended Helmholtz Resonator Acoustic Liner Impedance Model in Time Domain CAA

The application of wall acoustic lining is a major factor in the reduction of aircraft engine noise. The extended Helmholtz Resonator (EHR) impedance model is widely used since it is representative of the behavior of realistic liners over a wide range of frequencies. Its application in time domain CAA methods by means of z-transform has been the subject of several papers. In contrast to standard liner modeling in time domain CAA, which consists in imposing a boundary condition modeling both the cavities and the perforated sheet of the liner, an alternative approach involves adding the cavities to the computational domain and imposing a condition between these cavities and the duct domain to model the resistive sheet. However, the original method may not be used for broadband acoustics since it implements an impedance condition with frequency independent resistance. This paper describes an extension of this method to implement the EHR impedance model in a time domain CAA method.

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来源期刊

Journal of Computational Acoustics 物理-声学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Currently known as Journal of Theoretical and Computational Acoustics (JTCA).The aim of this journal is to provide an international forum for the dissemination of the state-of-the-art information in the field of Computational Acoustics. Topics covered by this journal include research and tutorial contributions in OCEAN ACOUSTICS (a subject of active research in relation with sonar detection and the design of noiseless ships), SEISMO-ACOUSTICS (of concern to earthquake science and engineering, and also to those doing underground prospection like searching for petroleum), AEROACOUSTICS (which includes the analysis of noise created by aircraft), COMPUTATIONAL METHODS, and SUPERCOMPUTING. In addition to the traditional issues and problems in computational methods, the journal also considers theoretical research acoustics papers which lead to large-scale scientific computations. The journal strives to be flexible in the type of high quality papers it publishes and their format. Equally desirable are Full papers, which should be complete and relatively self-contained original contributions with an introduction that can be understood by the broad computational acoustics community. Both rigorous and heuristic styles are acceptable. Of particular interest are papers about new areas of research in which other than strictly computational arguments may be important in establishing a basis for further developments. Tutorial review papers, covering some of the important issues in Computational Mathematical Methods, Scientific Computing, and their applications. Short notes, which present specific new results and techniques in a brief communication. The journal will occasionally publish significant contributions which are larger than the usual format for regular papers. Special issues which report results of high quality workshops in related areas and monographs of significant contributions in the Series of Computational Acoustics will also be published.