Coherent turbulent structures in flow through the human vocal tract

0353275 - ÚT 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Šidlof, Petr - Doaré, O. - Cadot, O. - Čejka, J.
Coherent turbulent structures in flow through the human vocal tract.
Experimental Fluid Mechanics 2010 - Conference Proceedings. Linerec: Technical University of Liberec, 2010 - (Vít, T.; Dančová, P.), s. 662-669. ISBN 978-80-7372-670-6.
[Experimental Fluid Mechanics 2010. Liberec (CZ), 24.11.2010-26.11.2010]
Grant CEP: GA AV ČR KJB200760801
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: vocal folds * PIV * airflow
Kód oboru RIV: BI - Akustika a kmity

This paper presents experimental and computational data on the coherent turbulent structures in flow through the human vocal tract. The experimental results were obtained using a 4:1 scaled self-oscillating physical model of vocal folds. Flow velocity fields in the coronal plane were visualized and measured using a PIV system phase-synchronized with vocal fold vibration. Computational results originate from finite volume discretizations of viscous incompressible Navier-Stokes equations in 2D and 3D. The results reveal flow separation in the divergent part of glottis and formation of a planar jet. Vortex structures are shed from the shear layer of the jet and convected further downstream. The computational model helps to assess the influence of the ventricular folds on the flow patterns.
Trvalý link: http://hdl.handle.net/11104/0192566