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論文
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榎本, 啓士 ; 橘, 裕司 ; 坂田, 直美 ; 瀬川, 大資 ; 角田, 敏一
概要:
金沢大学理工研究域機械工学系<br />An experimental study has been performed on the ignition process of liquid fuel particles to obtain
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the fundamental data of spray combustion. The particles consisted of the center particle and ligands arranged in a geometric configuration. The number of ligands was defined as coordination number. The particles were set in a combustion chamber and the combustion chamber was filled with a propane-air mixture at atmospheric pressure. The propagating laminar flame was formed with the hot wire ignition and the particles were ignited by the flame. The results showed that in case of coordination number 3, the dimensionless ignition delay of the center particle decreased with a decrease in the dimensionless particle distance, and that in case of coordination number 4 and 6, the dimensionless ignition delay of the center particle had a minimum. The minimum was the smallest in case of coordination number 6. The smaller particle diameter had the larger dimensionless particle distance that showed the minimun dimensionless ignition delay.
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論文 |
論文
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榎本, 啓士 ; 長田, 仁 ; 紺屋, 智之 ; 瀬川, 大資 ; 角田, 敏一
概要:
金沢大学理工研究域機械工学系<br />The present study aims to establish a new experimental methodology (Fine Wire Sustaining method, FWS
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) and to obtain the fundamental data of spray combustion, the combustion of the liquid fuel droplets cloud. To simulate the fuel droplet cloud, each droplet was suspended at points of intersection of fibers. The geometrically controlled droplets arrayed in two or three dimensions imitated the liquid fuel droplet cloud. The experiments were performed to investigate the flame shape and the ignition delay of the droplet cloud in high temperature. The influences of the surrounding droplets on the flame shape and on the ignition delay of the center droplet were investigated. The droplet distance was the experimental parameters. As a result of the experiments, the combustion characteristic of the droplet cloud could be investigated by using the new experimental methodology. The flame shape of the fuel droplet cloud could be classified by using the group combustion number G. The ignition delay of the center droplets arrayed in three dimensions decreased with the droplet distance to the extent that the flames are isolated.
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