Análise numérica da influência de filetes na vazão mássica de um venturi de carburador

Abstract

With the growing global pressure to reduce carbon emissions, the discussion on energy efficiency and optimization of mechanical components has intensified. While electric motors gain increasing attention in the media and the market, internal combustion engines still predominate worldwide, especially in emerging countries where cost and infrastructure limitations hinder the adoption of new technologies. In this study, a computational fluid dynamics (CFD) analysis was conducted on a Venturi tube used in air–fuel mixing systems. The adopted geometric model represents a simplified Venturi coupled to a throttle valve downstream of the throat, aiming to understand the airflow behavior under different throttle openings and geometric variations of the channel. The main objective of this work is to analyze how these variations affect the air velocity, static pressure, and mass flow rate, providing insights for a better understanding of the suction process in intake devices. The results indicate improvements in the performance of components based on the Venturi principle, with discharge coefficient gains ranging from 0.7% to 4.6%, which may contribute to greater system efficiency.