Integrated methodology for the prediction of helicopter rotor noise at mission level

Show simple item record Vouros, Stavros Goulos, Ioannis Pachidis, Vassilios 2019-04-04T15:39:25Z 2019-04-04T15:39:25Z 2019-04-03
dc.identifier.citation Vouros S, Goulos I, Pachidis V. (2019) Integrated methodology for the prediction of helicopter rotor noise at mission level. Aerospace Science and Technology, Volume 89, June 2019, pp. 136-149 en_UK
dc.identifier.issn 1270-9638
dc.description.abstract This paper presents an integrated approach for the aeroacoustic assessment of fourdimensional rotorcraft operations. A comprehensive rotorcraft code is utilized to model aircraft flight dynamics across complete missions. A free-wake aero-elastic rotor model is employed to predict high-resolution unsteady airloads, including blade-vortex interactions, at each mission element. A rotor aeroacoustics code is developed to calculate source noise and far-field ground acoustic impact. Time-domain acoustic formulations are used to evaluate near-field noise generation across designated acoustic spherical surfaces surrounding the helicopter main rotor. A numerical procedure is developed for the derivation of acoustic spheres on-the-fly, coupled with trajectory-adaptive ground observer grids. The individual analytical models are incorporated into a mission analysis numerical procedure. The applicability of the integrated method on “real-world” rotorcraft operations is demonstrated for two generic, four-dimensional missions, without the need of pre-stored noise data. The proposed approach provides insight into helicopter noise prediction at mission level, elaborating on the coupling of aeroelastic rotor response with rotorcraft flight dynamics and aeroacoustics. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights.uri *
dc.subject Computational aeroacoustics en_UK
dc.subject Helicopter noise prediction en_UK
dc.subject Mission analysis en_UK
dc.subject Acoustic spheres en_UK
dc.subject Ground noise footprint en_UK
dc.title Integrated methodology for the prediction of helicopter rotor noise at mission level en_UK
dc.type Article en_UK
dc.identifier.cris 23279278

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