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Communication Dans Un Congrès Année : 2019

Peak pressures at the throttled flow of oscillating valves

Résumé

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.
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Dates et versions

hal-02400078 , version 1 (16-12-2019)

Identifiants

  • HAL Id : hal-02400078 , version 1

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Dario Alviso, Denisse Sciamarella, Yann Fraigneau, Guillermo Artana. Peak pressures at the throttled flow of oscillating valves. II CCI UCLV 2019, Jun 2019, Cayos de Villa Clara, Cuba. ⟨hal-02400078⟩
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