TY - GEN
T1 - Acoustic source term interpolation in a hybrid aeroacoustic simulation of the human phonation
AU - Weitz, Michael
AU - Schoder, Stefan
AU - Maurerlehner, Paul
AU - Falk, Sebastian
AU - Döllinger, Michael
AU - Kaltenbacher, Manfred
PY - 2019
Y1 - 2019
N2 - Voice research is carried out experimentally by applying physical replicas and numerical models. Experimental investigations involve high personnel, material and thus financial costs. Furthermore, the scientific outcome is limited to the few parameters that are measured at specific positions in the larynx replica. In contrast to that, numerical models provide a much higher amount of results since parameters from all possible locations in the model can be obtained and analyzed. We follow a hybrid aeroacoustic approach, which performs in a first step an incompressible flow simulation on a computational grid which is capable of resolving all relevant turbulent scales. In a second step, we compute the acoustic source terms on the flow grid and perform a conservative interpolation to the acoustic grid on which we solve the perturbed convective wave equation to obtain the acoustic field. Finally, we validate the simulation results with results obtained from measurements.
AB - Voice research is carried out experimentally by applying physical replicas and numerical models. Experimental investigations involve high personnel, material and thus financial costs. Furthermore, the scientific outcome is limited to the few parameters that are measured at specific positions in the larynx replica. In contrast to that, numerical models provide a much higher amount of results since parameters from all possible locations in the model can be obtained and analyzed. We follow a hybrid aeroacoustic approach, which performs in a first step an incompressible flow simulation on a computational grid which is capable of resolving all relevant turbulent scales. In a second step, we compute the acoustic source terms on the flow grid and perform a conservative interpolation to the acoustic grid on which we solve the perturbed convective wave equation to obtain the acoustic field. Finally, we validate the simulation results with results obtained from measurements.
KW - Computational aeroacoustics
KW - Finite element method
KW - Human phonation
UR - http://www.scopus.com/inward/record.url?scp=85099329316&partnerID=8YFLogxK
U2 - 10.18154/RWTH-CONV-239325
DO - 10.18154/RWTH-CONV-239325
M3 - Conference paper
AN - SCOPUS:85099329316
T3 - Proceedings of the International Congress on Acoustics
SP - 1780
EP - 1787
BT - Proceedings of the 23rd International Congress on Acoustics
A2 - Ochmann, Martin
A2 - Michael, Vorlander
A2 - Fels, Janina
PB - International Commission for Acoustics (ICA)
T2 - 23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Y2 - 9 September 2019 through 23 September 2019
ER -