抄録
We applied a fuel-spray simulation to sprays from fuel injectors with multi-hole nozzles for direct injection gasoline-engines. Both fuel flows within the flow paths of an injector and liquid column at the injector outlet were simulated by using a grid method. The liquid-column breakup was simulated by using a particle method. The motion of droplets within the air/fuel mixture region was calculated by using a discrete droplet model. To verify the simulation model, simulation results were compared with measurements. Simulated spray penetrations agreed relatively well with measured spray penetrations. Effects of velocity distribution on spray penetration were studied. We found that high-speed region within nozzles increased the spray penetration.
