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Analyse des performances du dosage du carburant par le carburateur dans les moteurs à allumage commandé
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ISBN10: 6209762948
ISBN13: 9786209762949
Publisher: Editions Notre Savoir
Published: Mar 27 2026
Pages: 100
Weight: 0.32
Height: 0.24 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786209762949
Publisher: Editions Notre Savoir
Published: Mar 27 2026
Pages: 100
Weight: 0.32
Height: 0.24 Width: 6.00 Depth: 9.00
Language: French
Ce livre de recherche étudie les caractéristiques du flux d'air d'un venturi de carburateur à l'aide de la CFD pour différents angles de papillon. Un modèle tridimensionnel de venturi a été développé et analysé dans ANSYS Fluent. L'étude a évalué le comportement de la vitesse et de la pression pour des angles de papillon de 0 , 15 , 30 et 45 . Les résultats montrent que les faibles ouvertures du papillon produisent une faible accélération du flux d'air et une chute de pression insuffisante. L'augmentation de l'angle du papillon améliore la vitesse et réduit la pression statique au niveau de la gorge du venturi. L'angle d'étranglement de 30 offre le meilleur équilibre entre l'accélération du flux d'air et la répartition de la pression. Les courbes de vitesse et de pression à 30 montrent un écoulement régulier avec une séparation limitée. À 45 , un débit d'air plus élevé s'accompagne d'une turbulence accrue et d'une récupération non uniforme de la pression. La séparation et la recirculation du flux en aval du papillon contribuent aux pertes d'énergie. Dans l'ensemble, l'étude identifie 30 comme l'angle de papillon optimal pour une performance efficace du venturi et une meilleure formation du mélange air-carburant.
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