Design and analysis of De-laval restrictor with throttle body for formula Vehicle 2019-28-0009

Design and analysis of De-laval restrictor with throttle body for formula Vehicle Dr Soundararajan SKECT , Mr. Pradeep C, Force Motors , Mr. Ashwin Sriram, SKECT. Abstract Restrictor is a component which controls the mass flow of air passing to the engine. The proposed work focuses on design and analysis of air intake restrictor of Duke 390cc engine which is used in formula vehicles. As a constraint of this system, the air flows through a single circular throat of diameter 20mm. In past decades conventional venturi nozzles were used as a restrictor but it leads to nominal press drop. The main objective is to utilize De-Laval Nozzle for the minimal pressure drop. The change in pressure will increases the engine power output. The analysis is done by varying design conditions such as three levels of convergent (12,14 and 16 degree) and three levels of divergent angles (4, 6 and 8 degree) are taken into consideration. After numerous CFD Simulations it is inferred that the optimal angles of 14 and 4 degree for convergent and divergent angles has found the minimum delta pressure. On the other hand further analysis was carried out on the throttle body valve angle of the optimal restrictor. In this case the four different positions such as 5,45,75 and 90 degree valve angles are choose for simulation. From the analysis the valve angle of 75 degree is the optimal angle as it provides greater efficiency to the engine. The restrictor with the optimal angle is recommended for use in formula vehicles.