Separated flow behavior in an in-vitro rigid model of the laryngeal channel

4. D. SCIAMARELLA, E. CHISARI, G. ARTANA, L. BAILLY AND X. PELORSON

Paris

Conferencia; Acoustics 08; 2008

ASA

Flow through an in-vitro rigid model of the scaled-up laryngeal channel is measured using pressure sensors and visualized using the Schlieren technique for different geometrical configurations. Three downstream flow-conditions are considered: steady, quasi-impulsive and periodical using an electromechanical device controlling the inflow and producing the cyclic jet emerging from the glottis. The separated flow behavior in the presence of a ventricular constriction ("false vocal folds") is also examined. Direct theoretical flow predictions and numerical simulations are proposed to quantify the aerodynamic impact involved by the ventricular bands on the pressure distribution. Two parameters are investigated: the aperture of the ventricular bands and the distance between the vocal folds and the ventricular bands. The influence of both parameters are measured and compared to the theoretical outcome