Flow separation from the vocal fold surface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F10%3A00347988" target="_blank" >RIV/61388998:_____/10:00347988 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Flow separation from the vocal fold surface

Popis výsledku v původním jazyce

The paper presents both experimental and computational quantitative data on the position of the flow separation point during vocal vibration. The experimental results were obtained on a 4:1 scaled physical vocal fold model. Airflow was visualized using aPIV system synchronized with vocal fold vibration. Besides, dynamic subglottal and supraglottal pressure, radiated acoustic pressure and vocal fold vibration were measured by dynamic pressure transducers, measuring microphones and accelerometers. Computational data originate from finite element simulations of airflow past vibrating vocal folds. The airflow was modeled as incompressible and unsteady and driven by transglottal pressure difference using Arbitrary Lagrangian-Eulerian approach. The resultssuggest that the flow separation criterion holds approximately during most of the oscillation cycle when vocal folds are wide apart. Near vocal fold collision, however, the airflow separates further downstream and in an asymmetric way.

Název v anglickém jazyce

Flow separation from the vocal fold surface

Popis výsledku anglicky

The paper presents both experimental and computational quantitative data on the position of the flow separation point during vocal vibration. The experimental results were obtained on a 4:1 scaled physical vocal fold model. Airflow was visualized using aPIV system synchronized with vocal fold vibration. Besides, dynamic subglottal and supraglottal pressure, radiated acoustic pressure and vocal fold vibration were measured by dynamic pressure transducers, measuring microphones and accelerometers. Computational data originate from finite element simulations of airflow past vibrating vocal folds. The airflow was modeled as incompressible and unsteady and driven by transglottal pressure difference using Arbitrary Lagrangian-Eulerian approach. The resultssuggest that the flow separation criterion holds approximately during most of the oscillation cycle when vocal folds are wide apart. Near vocal fold collision, however, the airflow separates further downstream and in an asymmetric way.

Druh

O - Ostatní výsledky

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

<a href="/cs/project/KJB200760801" target="_blank" >KJB200760801: Matematické modelování a experimentální výzkum interakce proudění s pružnou strukturou v lidských hlasivkách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů