| Issue |
Acta Acust.
Volume 8, 2024
Topical Issue - Numerical, computational and theoretical acoustics
|
|
|---|---|---|
| Article Number | 62 | |
| Number of page(s) | 15 | |
| DOI | https://doi.org/10.1051/aacus/2024048 | |
| Published online | 18 November 2024 | |
Scientific Article
Heuristic solution for the acoustic radiation of a moving monopole in an inhomogeneous and moving atmosphere. Application to aircraft noise
Ecole Centrale de Lyon, CNRS, Université Claude Bernard Lyon 1, INSA Lyon, LMFA, UMR5509, 36 avenue Guy de Collongue, 69130 Ecully, France
* Corresponding author: bill.kayser@ec-lyon.fr
Received:
19
April
2024
Accepted:
5
August
2024
A coupled approach is proposed for predicting sound radiation from a monopole in arbitrary motion in a moving and inhomogeneous atmosphere. It is based on a heuristic model proposed in the literature for sound radiation by a moving source in a homogeneous atmosphere at rest above an absorbing ground and a ray-tracing code, which takes into account meteorological effects. Validation of the model is performed with a reference three-dimensional finite-difference time-domain solution of the linearized Euler equations for several test-cases with different source trajectories and atmospheric conditions. We show that neglecting convective amplification or the source motion between the emission and reception times can lead to significant errors in the predictions. Finally, an application case for aircraft noise is presented. The importance of ground and meteorological effects on the sound pressure levels is highlighted.
Key words: Aircraft noise / Ray-tracing / Heuristic formulation / Outdoor propagation
© The Author(s), Published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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