SC1-4: Spray Evaporation and Combustion Characteristics of Group-Hole Nozzle for D.I. Diesel Engines(SC: Spray and Spray Combustion,General Session Papers)
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概要
- 論文の詳細を見る
The group-hole nozzle has a series of group of holes and each group consists of two small holes with a small spatial interval and a small angle. It will be expected that minimized holes enhances fuel atomization and evaporation, in addition, small spatial interval between two holes maintains the spray tip penetration. Studies of quantitative spray/ mixture properties injected by the group-hole nozzles under several angle between two holes were conducted via the laser absorption scattering (LAS) technique. Since the spray from the group-hole nozzle is not axisymmetric, the original LAS technique based on the assumption of the axisymmetric spray structure is not applicable. The original LAS technique was extended to obtain the accumulative mass and mass distributions of vapor/ liquid phase per unit projection area of the group-hole and the conventional hole nozzle sprays. The in-cylinder ignition and combustion processes of the group-hole nozzle and the conventional multi-hole nozzle were investigated by using the optical research engine. In the case of the impinging spray, the group-hole nozzle enhances the fuel evaporation as well as the spray tip penetration. Form the in-cylinder ignition and combustion process visualization, it was found that the group-hole nozzle produces lower mean flame luminosity than that of the standard-hole nozzle. Much air can be expected to be entrained into the spray, and a suitable air-fuel mixture for low soot combustion was formed by the group-hole nozzle.
- 2008-07-28
著者
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Namba Makoto
Department Of Chemistry Graduate School Of Science Osaka University
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Gao Jian
Univ. Of Hiroshima
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MATSUMOTO Yuhei
Univ. of Hiroshima
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Nishida Keiya
Department Of Mechanical System Engineering University Of Hiroshima
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Nishida Keiya
Department Of Mechanical Engineering Hiroshima University
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Gao Jian
Department Of Astronomy Beijing Normal University
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Nishida Keiya
Department Of Mechanical Systems Engineering University Of Hiroshima
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Namba Makoto
Department Of Mechanical Systems Engineering University Of Hiroshima
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Matsumoto Yuhei
Department Of Mechanical Systems Engineering University Of Hiroshima
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