Predicting noise spectrum of a small drone rotor in a confined environment: a lattice Boltzmann Vles analysis
Riccardo Colombo, Lorenzo Maria Pii, Gianluca Romani, Maurizio Boffadossidownload PDF
Abstract. The objective of this paper is to study the predictive capabilities of a Very-Large-Eddy-Simulation CFD solver for the simulation of the flow past a small drone propeller blade. The solver is based on a Lattice-Boltzmann Method coupled with an FW-H acoustic analogy to compute the far field noise. The method is able to cope with the anechoic test chamber to predict the complex flow-field and the characteristic boundary layer phenomena (such as laminar separation, transition and reattachment). The acoustic hybrid formulation provides tonal and broadband noise radiation in agreement with the experimental data. Frequency spectrum prediction exhibited a strong low-frequency tonal contribution at multiples of the blade passing frequency related to the interaction with coherent vortical structures in hover, and a high-frequency broadband hump due to the laminar separation bubble at high advance ratio.
Propeller Aerodynamics, Laminar Separation Bubble, Aerodynamic Noise, Lattice-Boltzmann Method, Very-Large-Eddy-Simulation, Confined Aeroacoustics
Published online 11/1/2023, 4 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Riccardo Colombo, Lorenzo Maria Pii, Gianluca Romani, Maurizio Boffadossi, Predicting noise spectrum of a small drone rotor in a confined environment: a lattice Boltzmann Vles analysis, Materials Research Proceedings, Vol. 37, pp 21-24, 2023
The article was published as article 5 of the book Aeronautics and Astronautics
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