J. W. Park1, Kang Y. Huh1, K. H. Park2
1Pohang University of Science and Technology Department of Mechanical Engineering Kyungbuk, Korea
2Korea Maritime University School of Mechanical Systems Engineering Yeongdo-Ku Pusan, Korea
Tóm tắt
The combustion characteristics of emulsified diesel fuels are investigated in a rapid compression and expansion machine (RCEM). Among the test cases, the 40 water-oil (W/O) fuel injected at 20° before top dead center (BTDC) has shown the best performance with respect to efficiency and NOx and soot emissions. The pressure trace of the 40 W/O fuel is characterized by a longer ignition delay and a lower rate of pressure rise in premixed combustion. High-speed photographs show reduced flame luminosity and lower flame temperature with increasing W/O ratio. Microexplosions of emulsified fuel droplets, which affect the local shape and brightness of the flame, are identified in magnified flame images.
