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      정적연소기에서 분위기 압력에 따른 Diesel-DME 혼합연료의 분무 특성에 관한 연구

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      The aim of this study was compared the spray characteristics of a typical fuel(100% Diesel,DME) and Diesel-DME blended fuel in Constant Volume Combustion Chamber(CVCC). typical fuel(100% Diesel,DME) and Diesel-DME blended fuel spray characteristics we...

      The aim of this study was compared the spray characteristics of a typical fuel(100% Diesel,DME) and Diesel-DME blended fuel in Constant Volume Combustion Chamber(CVCC). typical fuel(100% Diesel,DME) and Diesel-DME blended fuel spray characteristics were investigated about varied ambient pressure and fuel injection pressure using the common rail fuel injection system when the fuel mixture ratio is varied. The fuel injection quantity and spray characteristics were measured. the spray characteristic research parameters were spray shape, penetration length, and spray angle at seven nozzle hole injector. common types of injectors were used(bosch). Three types of blended fuel by the mole fraction was used. The typical fuel(100% Diesel,DME) and The blended fuel by mixture ratio 95:5, 90:10 (Diesel,DME) were used. The ambient pressure was varied by 5MPa from 35 to 70MPa when the ambient Pressure was varied 0,2.5 and 5MPa. The result of using Diesel-DME blended fuel. It can be confirmed from the experiment on spray characteristics of Diesel-DME blended fuels that the increased Diessel blending ratio induced the increase of the spray penetration length. The spray angle slightly increased by the blending of DME fuel. In the experiment on atomization characteristics, the DME blending caused the improvement of the diesel atomization performance.

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