횡방향 유속 변화에 따른 고압 가솔린 스월 인젝터의 분무특성

Abstract

The direct injection into the cylinders has been regarded as a way of the reduction in fuel consumption and pollutant emissions. The spray produced form the injector of DISI(Direct Injection Spark Ignition) engine is of paramount importance in DISI engines The interaction between air flow and fuel spray was investigated in a steady flow system embodied in a wind tunnel to simulate the variety of flow inside the cylinder of the GDI engine. The direct Mie scattered images presented the macroscopic view of the liquid spray fields interacted wit crossflow. Particle sizes of fuel droplets were investigated by Phase Doppler Anemometer(PDA) system. Faster crossflow field made SME larger and D10 smaller. The processes of atomization and evaporation with a GID injector were observed and consequently utilized to construct the data-base for the spray and fuel-air mixing mechanism as a function of the flow characteristics.