Parametric Design Of Intake Port Based On 1D/3D Simulation

Engine is the source of power. The engine design should meet many requirements, such as the reliability and service life of the whole structure parts. At the same time, the efficiency, power, quality and fuel consumption ratio of engine are used to evaluate its capacity from thermal conversion for mechanical work. The quality of engine intake and exhaust port, cylinder and exhaust pipe affects the engine's drivability and poisonous exhaust emission levels.The traditional design method mainly relies on designer experience, repeat test. Based on the comparative analysis, the performance parameters are obtained. This method is costly, long life cycle, weak applicability and ineffective. Multi-dimensional numerical simulation method is used to research air circulation characteristics. The micro circumstance of the airway internal flow field is gotten. And the comprehensive evaluation parameters of intake port are achieved. Based on the effect of evaluation parameters on the engine, the intake port is optimized. In this study, the CG150 engine is the research target. The properties of air in the airway are simulated by SC/Tetra software. Meanwhile the swirl ratio of cylinder and the flow coefficient of intake and exhaust ports are obtained. And the calculated results are used as input parameters for engine's one-dimensional dynamical simulation. The comparison between numerical simulation results and experiments is verified that the simulated results are reliability. Finally, parametric design method is take advantage on the intake port design. And it is validated by the numerical simulation experiment.