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A Study on LPG Spray and Combustion Characteristics
이성욱(Lee Seang-wock),Nagashima Naoki,Kusaka Jin,Daisho Yasuhiro 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
It has been recognized that alternative fuels such as Liquid Petroleum Gas (LPG) less polluting combustion characteristics than diesel fuel. Furthermore, engine performance is expected to be nearly equal to that of the diesel engine both in thermal efficiency and power output. However the properties of LPG are quite different from those of diesel fuel. Understanding the characteristics of LPG spray and evaporating processes are very important for developing efficient and low emission LPG engines optimized in fuel injection control and combustion processes. In this study, the LPG spray characteristics and evaporating processes were investigated using the Schlieren optical system and single-hole injectors in a constant volume chamber at room temperature. Also the characteristics of combustion were investigated using simultaneous visualization of OH radical and flames. The results show that the mixture moves along the impingement wall that reproduced the piston bowl and reaches in ignition spark plug. Also, OH fluorescence rises sharply and then decreases gradually when the combustion is carried out actively.