Impact of the sub-grid scale turbulence model in aeroacoustic simulation of human voice

0542861 - ÚT 2022 RIV CH eng J - Článek v odborném periodiku
Lasota, M. - Šidlof, Petr - Kaltenbacher, M. - Schoder, S.
Impact of the sub-grid scale turbulence model in aeroacoustic simulation of human voice.
Applied Sciences-Basel. Roč. 11, č. 4 (2021), č. článku 1970. E-ISSN 2076-3417
Grant CEP: GA ČR(CZ) GA19-04477S
Grant ostatní: Student Grant Scheme at the Technical University of Liberec(CZ) SGS-2020-3068; Ministerstvo školství, mládeže a tělovýchovy - GA MŠk(CZ) LM2018140
Institucionální podpora: RVO:61388998
Klíčová slova: human phonation * vocal folds * turbulent flow * aeroacoustics * LES * WALE SGS * PCWE
Obor OECD: Acoustics
Impakt faktor: 2.838, rok: 2021
Způsob publikování: Open access
https://www.mdpi.com/2076-3417/11/4/1970

In an aeroacoustic simulation of human voice production, the effect of the sub-grid scale (SGS) model on the acoustic spectrum was investigated. In the first step, incompressible airflow in a 3D model of larynx with vocal folds undergoing prescribed two-degree-of-freedom oscillation was simulated by laminar and Large-Eddy Simulations (LES), using the One-Equation and Wall-Adaptive Local-Eddy (WALE) SGS models. Second, the aeroacoustic sources and the sound propagation in a domain composed of the larynx and vocal tract were computed by the Perturbed Convective Wave Equation (PCWE) for vowels [u:] and [i:]. The results show that the SGS model has a significant impact not only on the flow field, but also on the spectrum of the sound sampled 1 cm downstream of the lips. With the WALE model, which is known to handle the near-wall and high-shear regions more precisely, the simulations predict significantly higher peak volumetric flow rates of air than those of the One-Equation model, only slightly lower than the laminar simulation. The usage of the WALE SGS model also results in higher sound pressure levels of the higher harmonic frequencies.
Trvalý link: http://hdl.handle.net/11104/0321473