Print Email Facebook Twitter Aircraft community noise prediction in 3D environments using Gaussian beam tracing Title Aircraft community noise prediction in 3D environments using Gaussian beam tracing Author Yunus, F. (TU Delft Wind Energy) Casalino, D. (TU Delft Wind Energy) Avallone, F. (TU Delft Wind Energy) Ragni, D. (TU Delft Wind Energy) Date 2022 Abstract 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. To reference this document use: http://resolver.tudelft.nl/uuid:13315c23-7dc3-4965-a380-14137ceb3c72 DOI https://doi.org/10.2514/6.2022-3079 Publisher American Institute of Aeronautics and Astronautics Inc. (AIAA) Embargo date 2022-12-26 ISBN 978-162410664-4 Source 28th AIAA/CEAS Aeroacoustics Conference, 2022 Event 28th AIAA/CEAS Aeroacoustics Conference, 2022, 2022-06-14 → 2022-06-17, Southampton, United Kingdom Series 28th AIAA/CEAS Aeroacoustics Conference, 2022 Bibliographical note Green 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. Part of collection Institutional Repository Document type conference paper Rights © 2022 F. Yunus, D. Casalino, F. Avallone, D. Ragni Files PDF 6.2022_3079.pdf 7.58 MB Close viewer /islandora/object/uuid:13315c23-7dc3-4965-a380-14137ceb3c72/datastream/OBJ/view