X Conferencia Internacional de Ingeniería Mecánica "COMEC 2019" -V Simposio de Diseño e Ingeniería asistida por computadora, Biomecánica y Mecatrónica

X Conferencia Internacional de Ingeniería Mecánica

COMEC 2019

Peak pressures at the throttled flow of oscillating valves

Resumen [ES]

Pressure signals measured at the throttled flow of oscillating valves show a double peak when the closing and reopening of the clearance occur in short times. This phenomenon has been evidenced in spring-loaded valves or in valves of biological flows such as vocal-fold collision upon glottal flow. A comprehensive study of the fluid dynamical causes of this flow behavior is still pending. This work considers a valve with a simple geometry and a prescribed evolution of gap height with time. High performance numerical simulations in two dimensions and simplified models are used to explain experimental results and undertake a parametric study. A reversal of the longitudinal volumetric flow direction near the entrance and exit of the channel at closing and reopening, named suction-cup effect, is shown to be associated to the double peak presence in pressure signals.

Resumen [EN]

Pressure signals measured at the throttled flow of oscillating valves show a double peak when the closing and reopening of the clearance occur in short times. This phenomenon has been evidenced in spring-loaded valves or in valves of biological flows such as vocal-fold collision upon glottal flow. A comprehensive study of the fluid dynamical causes of this flow behavior is still pending. This work considers a valve with a simple geometry and a prescribed evolution of gap height with time. High performance numerical simulations in two dimensions and simplified models are used to explain experimental results and undertake a parametric study. A reversal of the longitudinal volumetric flow direction near the entrance and exit of the channel at closing and reopening, named suction-cup effect, is shown to be associated to the double peak presence in pressure signals.

Sobre el ponente

Guillermo Artana

Prof. Guillermo Artana

FIUBA Flag of Argentina
Información Práctica
Ponencia
English (US)
junio 25, 2019 2:45 p. m.
15 minutos
Salón El Carmen
Autores
Dario Alviso
Prof. Guillermo Artana
Yann Fraigneau
Denisse Sciamarella
Palabras clave