定容容器を用いた高温・高圧場における成層燃焼 : 装置の開発と燃焼実験について

概要

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A constant-volume combustion system has been developed to reproduce direct-injection stratified-charge combustion, which is regarded as a promising concept for lean combustion. A fully premixed mixture consisting of N_2, O_2 and H_2 was ignited to obtain a high pressure and temperature occurring at the top dead center in a real engine. The H_2 in the mixture is oxidized by a part of the O_2; thus, a N_2-H_2O-O_2 mixture can be prepared before the injection of iso-octane fuel. Velocities of the swirling air in the vessel were measured by hot-wire anemometry and combustion was analyzed from schlieren photographs and combustion pressures. The results show that a compromise should be achieved between burning velocity and NOx and HC emissions by adjusting the swirl level.
1987-05-20