Study of Discharge under Swirl Flow and Combustion Conditions
The combustion at a high EGR ratio is one of the effective means for improving the fuel efficiency of a gasoline engine. However, there is a problem that the combustion speed decreases. So it is necessary to intensify the in-cylinder flow to ensure the combustion speed. The spark discharge generated by the ignition coil is strongly influenced by the in-cylinder flow. It forms an arcuate discharge path along the flow, and possibly it blows off and re-discharges occurs under a strong gas flow. The behavior of spark discharge strongly affects the ignition, and consequently affects the stability of combustion. However, the phenomena in a combustion chamber is very complicated because of various environmental conditions, and the discharge and combustion phenomena under a strong gas flow are remains unclear. In this research, in order to study these phenomena, discharge and combustion experiments under flow using a constant volume container were performed.