ディーゼル噴霧中の空気導入特性に関する理論予測式と実験値との比較 (<小特集>エンジンシステムの新展開)

概要

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This paper presents a theory and its experimental validation for air entrainment changes in fuel sprays in DI diesel engines. The theory predicts air entrainment changes for a variety of swirl speeds, numbers of nozzle holes, nozzle diameters, engine speeds, injection speeds and fuel densities. The formulae of the theory are simple nondimensional equations, which are applicable to engines of various sizes. Experiments were performed in order to compare theoretical predictions and experimental results in six different engines varying from 85 to 800 mm in bore. All results showed good agreement with the theoretical predictions for shallow-dish piston engines. Using the theory, it is possible to interpret a variety of combustion phenomena in diesel engines, providing additional understanding of diesel combustion characteristics.
社団法人日本機械学会の論文
1995-10-25