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Trajectory and Dispersion of a Spray Impinging on a Combustion Chamber Wall in a Direct Injection Diesel Engine
ipc-8-95/9530157

Authors

Takuo Yoshizaki - University of Hiroshima
Keiya Nishida - University of Hiroshima
Hiroyuki Hiroyasu - University of Hiroshima
Masami Miyazaki - University of Hiroshima
Seiji Komaguchi - University of Hiroshima

Abstract

An experimental study using high speed, focused shadow photography was made on the trajectory and dispersion of a spray impinging on a wall in a high pressure bomb. The impinging wall had a two dimensional shape that simulated the cross sectional shape of a combustion chamber surrounded by a piston cavity, piston top and a cylinder head of a direct injection diesel engine. The ambient gas conditions were high pressure, room temperature and quiescent. The effects of several engine variables such as the injection direction and the piston top clearance on the trajectory and dispersion of the impinging spray were investigated. The trajectory and dispersion of the spray impinging on the round cavity wall were also observed.

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