流动圆形管道的高阶模态辐射

IF 1 3区物理与天体物理 Q4 ACOUSTICS

Acta Acustica Pub Date : 2023-01-01 DOI:10.1051/aacus/2023011

C. Ford, Antonio Pereira, C. Bailly

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引用次数: 0

摘要

这项工作的目的是预测一个给定的模态内容的传递函数，在一个平均流量存在的圆形管道与喇叭口入口。传递函数是管道内给定模式与远场观察者之间的振幅和相位关系。以平均流量为输入数据，通过有限元模拟得到了数值解。通过与均匀流动的无挡板圆管的解析解进行比较，验证了该方法的正确性。研究了几何形状和平均马赫数等参数对辐射压力场的影响。解析解对于寻找辐射主瓣是一个很好的近似，并且在研究静态进气道构型时，发现进气道几何形状比平均流量等其他参数更重要。

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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Radiation of higher order modes from circular ducts with flow

This work aims to predict the transfer function of a given modal content inside a circular duct with a bellmouth inlet in the presence of a mean flow. The transfer function is the relation in amplitude and phase between a given mode inside the duct and an observer located in the far-field. The numerical solution is obtained by finite element simulation in which the mean flow is input data. Verification is provided by comparison to the analytical solution of an unbaffled circular duct with uniform flow. Influence from various parameters such as the geometry and mean Mach number on the radiated pressure field is investigated. The analytical solution is a good approximation for finding the radiated principal lobe, and the inlet geometry is found to be more important than other parameters such as mean flow when static inlet configuration is studied.

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来源期刊

Acta Acustica ACOUSTICS-

CiteScore

2.80

自引率

21.40%

发文量

审稿时长

12 weeks

期刊介绍： Acta Acustica, the Journal of the European Acoustics Association (EAA). After the publication of its Journal Acta Acustica from 1993 to 1995, the EAA published Acta Acustica united with Acustica from 1996 to 2019. From 2020, the EAA decided to publish a journal in full Open Access. See Article Processing charges. Acta Acustica reports on original scientific research in acoustics and on engineering applications. The journal considers review papers, scientific papers, technical and applied papers, short communications, letters to the editor. From time to time, special issues and review articles are also published. For book reviews or doctoral thesis abstracts, please contact the Editor in Chief.