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VORTEX SHEDDING FLOW METER [1 record]

Record 1 1989-01-15

English

Subject field(s)
  • Electrical Measuring Equipment
  • Electronic Measurements
  • Fluid Mechanics and Hydraulics (Physics)
CONT

Flowmeters have been developed based on the phenomena of vortex shedding ... each vortex builds up and breaks loose, followed by a repeat in the opposite rotation on the other side of the obstruction, and so alternately the vortices shed and go downstream in what is called a vortex street. ... the frequency of the shedding is directly proportional to the velocity of the fluid.

OBS

Application of vortex-shedding flowmeters is normally limited to the turbulent-flow regime....

French

Domaine(s)
  • Appareils de mesures (Électricité)
  • Mesures électroniques
  • Mécanique des fluides et hydraulique (Physique)
CONT

Compteurs à tourbillons. Ces compteurs utilisent l'effet vortex qui se produit naturellement lorsqu'un fluide en écoulement turbulent heurte un obstacle non profilé. Les lignes de courant du fluide ne suivent plus à partir d'un certain point, appelé point de décollement, la surface de l'obstacle et des courants de retour engendrent des tourbillons entraînés par le courant.

OBS

Une thermistance est généralement employée pour compter le nombre de tourbillons formés durant le temps de la mesure.

Spanish

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