A new model of fuel spray shape at early stage of injection in a marine diesel engine

Purpose In the cylinders of a marine diesel engine, self-ignition occurs in very short time after fuel injection into combustion chamber. Therefore, this paper aims to develop model spray for early stage engine. The main technical aspects such as nozzle diameter engine injector and backpressure chamber were taken consideration. Design/methodology/approach paper, laboratory experimental studies carried out determine parameters an optical measuring Mie scattering technique was used record process. working space constant volume same during operation Based on important Hiroyasu Arai models presented literature proposed new injectors. Findings two described evolution”: tip penetration (STP) cone angle (SCA). New propagation STP included influence backpressure. has lower error, about 15%–34%, than Arai. Moreover, evolution over SCA is developed. Research limitations/implications future research process must be temperature. Diesel different density viscosity dependence Therefore are predicted expansion temperature, limitations occurring not possible carry while real Originality/value An test Design selected basis actual one. literature, defined parameter specific preliminary data. A been proposed. especially important, because comes there self-ignition.