Investigation of Flow Field Modeling on Gasoline Engine of Motor Cycles
Keywords:
Gasoline Engine, In-Cylinder, CFD, Speed, ConvergeAbstract
Internal combustion engine is the best available source of power for transportation sectors. The big issue appears at the efficiency of these engines. Every effort made to improve these engines to obtain the maximum efficiency. The gasoine engine performance is improved by the proper design of inlet manifold, combustion chamber, exhaust manifold, etc. The goal of this study is to investigate the in-cylinder flow characteristic of gasoline engine of motor cycles using Computational Fluid Dynamics (CFD) at three different speed (1500 rpm, 2000 rpm and 2500 rpm) like tumble, swirl, turbulence during cold start condition. The model of the intake port was analyzed by using Converge. The mesh was generated using the polyhedral scheme which includes primarily of tetrahedral mesh elements. The pressure boundary conditions were used to define the fluid pressure at the inlet and outlet of port. The tumble is decreased two folds between the speeds 1500 and 2000 rpm, and down one time in tumble between 2000 and 2500 rpm. The swirl in negative axis is increased two folds between the speeds 1500 and 2000 rpm, and increased a half time between 2000 and 2500 rpm. The results indicate that the CFD model can be used as a tool to investigate deeply the effect of various parts of port for optimization like manifold, spray, film, mixture formation and combustion. Finally, this study gives an effect to reduce the number of experiments to be carried out for arriving at the final optimized system.
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