Numerical Simulation of Flow Passage through Throttle Shutters in Piston Engines

Throttle valve devices are widely used in modern engines, for example, in petrol engines to regulate the operation cycle and in diesel engines to regulate flow passage through the intake manifold in order to create air turbulence in the combustion chamber. To rationalize the application of throttle devices it is necessary to know their characteristics (flow coefficient, passage cross-sections, etc.) that can be determined through experiments and calculations. The present article describes numerical simulation of 3D flow through throttle plate used in intake systems of automobile piston engines with quantitative carburation. The simulation was performed using ANSYS Fluent. Fields of gas-dynamic parameters are presented; dependencies of the flow coefficient on the throttle turning angle, which are required for gas exchange calculations, are determined. The obtained results are in agreement with corresponding experimental results. The results of the study can be used for designing inlet and outlet systems of piston engines. 

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