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Aircraft pass-by noise on ground modelled with the SAFT-program
CIT - Chalmers Industriteknik Chalmers Teknikpark 412 88 Gothenburg, Sweden.
KTH, Superseded Departments (pre-2005), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, Superseded Departments (pre-2005), Vehicle Engineering.ORCID iD: 0000-0001-7898-8643
2019 (English)In: Proceedings of the INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering, 2019Conference paper, Published paper (Refereed)
Abstract [en]

SAFT (Simulation of atmosphere and Air traffic For a quieter environmenT) is the name of a simulation tool for aircraft noise propagation that has been developed at CIT, Chalmers and KTH since the end of 2016. It is funded through CSA – Centre for Sustainable Aviation at KTH. Already in its current state SAFT enables aircraft pass-by noise estimations of several kinds. The set of computational approaches stretches from the most complex “full-simulation” ones, involving directivity, timeand frequency dependent individual (jet, fan, flaps, ...) noise sources as well as sound propagation through a refractive atmosphere, down to the more old-fashioned “integrated” computational methods such as given in ECAC doc.29. Special attention has been paid to making the tool user-friendly and fast to run. Even in the case with a refractive atmosphere model SAFT runs at rather short CPU-times thanks to a new concept of a Transmission Loss interpolation matrix. The typical result from SAFT-runs is either a noise-contour map (LAmax, SEL(A) or other metric) or the noise level time history in selected ground points (for simulation computations only). Other features involves possibilities to plot dB-contours from “any possible” model-, parameter- or aircraft procedure variation. E.g. comparison of results such as from ECAC doc.29 vs “full-simulation”, aircraft A vs aircraft B, weather condition X vs weather Y, different absorption models, different engine, airframe or procedure modifications etc. In a planned effort noise-source data in SAFT is to be extended with measured aircraft pass-by noise, time-correlated with FDR or/and trajectory data from the Opensky database. 

Place, publisher, year, edition, pages
2019.
Keywords [en]
: sound propagation, aircraft noise simulation
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-268268Scopus ID: 2-s2.0-85077678261OAI: oai:DiVA.org:kth-268268DiVA, id: diva2:1416618
Conference
INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering
Note

QC 20200324

Available from: 2020-03-24 Created: 2020-03-24 Last updated: 2020-03-24

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Scopushttp://www.sea-acustica.es/fileadmin/INTERNOISE_2019/Enter.htm

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Åbom, Mats

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Aeronautical and Vehicle EngineeringLinné Flow Center, FLOWCompetence Center for Gas Exchange (CCGEx)Vehicle Engineering
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