2407 Characteristics of Ambient Gas Entrainment into D.I. Diesel Spray : Effect of Nozzle-Hole Diameter and Wall Impingement
Details
Laser absorption scattering (LAS) measurement was made of the D.I. Diesel spray injected by a common rail injection system into a high-pressure and high-temperature constant volume vessel. Effects of nozzle-hole diameter and flat wall impingement on spray and mixture properties, such as spray tip penetration, mass of ambient gas entrained into the spray and mass of vapor phase fuel in the spray were investigated. The mass of ambient gas entrained and the mass of vapor phase fuel, both of which are normalized by the total (vapor and liquid) fuel in the spray, are increased as the nozzle hole diameter is small-sized. The flat wall impingement of the spray suppresses the ambient gas entrainment and fuel evaporation.
