This work presents a novel noise propagation approach based on the Gaussian Beam Tracing (GBT) method that accounts for complex source directivity, weather conditions, and irregular ground topology for the evaluation of the noise footprint. The approach takes a precomputed noise sphere as input and propagates the acoustic pressure fluctuations through a moving inhomogeneous atmosphere over realistic three-dimensional (3D) terrain. Noise footprints, obtained with di erent source noise spheres and wind flow conditions, are compared. It is found that, in a quiescent atmosphere, a change in the source directivity results in a variation up to 15 dB on the acoustic footprint. In the presence of the mean flow, the variation in the noise footprint can reach up to 35 dB. The results suggest that any variation in the source directivity and wind flow can cause a significant change in the acoustic footprint predicted in 3D environments with varying terrain topology and wind flow.
|Title of host publication||28th AIAA/CEAS Aeroacoustics Conference, 2022|
|Publisher||American Institute of Aeronautics and Astronautics Inc. (AIAA)|
|Number of pages||17|
|Publication status||Published - 2022|
|Event||28th AIAA/CEAS Aeroacoustics Conference, 2022 - Southampton, United Kingdom|
Duration: 14 Jun 2022 → 17 Jun 2022
|Name||28th AIAA/CEAS Aeroacoustics Conference, 2022|
|Conference||28th AIAA/CEAS Aeroacoustics Conference, 2022|
|Period||14/06/22 → 17/06/22|
Bibliographical noteGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.