Aeroacustics computation based on harmonic balance solution

Aeroacustics computation based on harmonic balance solution

Luca Abergo, Alberto Guardone

Abstract. This paper presents a new open-source framework to compute the noise emitted by aerodynamic bodies whose motion is dominated by a specific frequency. This flow behavior is typical of propellers, pitching blades and wind turbines. The reduced order model called harmonic balance is used to compute the unsteady flow solution reducing the computational cost. K frequencies are solved by obtaining the conservative variables at N-time instances inside one period, where N = 2k+1. The time history of the surface flow solution is reconstructed with a Fourier integration. The Kirchhoff Ffowcs Williams Hawkings integral formulation, implemented in SU2, is used to compute the sound pressure level perceived by farfield observers. The integral formulation propagates the acoustic solution with a computational cost independent of observer distance. The noise emittance of a pitching wing is computed with the proposed framework and compared with a fully time accurate solution showing a very good agreement.

Keywords
Aeroacoustics, Harmonic Balance, ROM, FWH

Published online 11/1/2023, 7 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Luca Abergo, Alberto Guardone, Aeroacustics computation based on harmonic balance solution, Materials Research Proceedings, Vol. 37, pp 10-16, 2023

DOI: https://doi.org/10.21741/9781644902813-3

The article was published as article 3 of the book Aeronautics and Astronautics

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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