Dimethyl Ether (DME)와 디젤의 분사율의 변화에 따른 분무 도달거리

Abstract

Dimethyl ether(DME) has been considered as one of the most attractive alternative fuel for compression ignition engine. its main advantage in diesel engine application is high efficiency of diesel cycle with soot free combustion though conventional fuel injection system has to be modified due to the intrinsic properties of DME. experimental study of DME and conventional diesel spray employing a common-rail type fuel injection system with a 5-holes asc type injector was performed in a constant volume vessel pressurized by nitrogen gas. the borsch type rate of injection meter records the injection rate of DME and diesel fuel. the injection delay of DME is shorter than that of diesel fuel. the measured injection rates of DME and diesel fuel were correlated with spray penetrations. the penetration prediction method was constructed by using injection rate. that method was verified by applying to the hiroyasu´s penetration model