Communication science et technologie
Volume 17, Numéro 1, Pages 41-58
2019-01-01
Numerical Study Of The Combustion Process And Emissions Pollution In A Spark Ignition Engine
Authors : Bousbaa Hamza . Bouhadja Yamina .
Abstract
To better understand the in-cylinder complicated physical phenomenon, Computational Fluid Dynamics (CFD) in conjunction with optical methods, has attracted increasingly popular attention in the vehicle. In this study, a numerical simulation has been developed using the CONVERGE software to perform investigation of indirect injection system into the cylinder of spark ignition internal combustion engines. The RANS approach is used. To simulate the airflow field, was achieved by the rapid distortion RNG (k-ε) model. The atomization process was computed using the model based on KH-RT models. For combustion, the SAGE model associated with Shell ignition model was used. For prediction, extended Zeldovich model was adopted. Finally the Hiroyasu soot model was used for soot prediction. The numerical results obtained by the CONVERGE computer code that takes into account interactions between chemistry and turbulence will be compared with experimental results obtained in a combustion chamber of spark ignition engines. The experimental in-cylinder pressures are used to calibrate the CFD code. The result was found to have excellent agreement with experimental and numerical results. The numerical results demonstrate that the numerical CFD tools, at their stage of development, can help the engine designers to define the more promising strategies to obtain tailpipe emission control of SI engine.
Keywords
spark ignition engines, combustion, pollution, CONVERGE, numerical investigation
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