G060043 二液滴の蒸発・自発点火に与える相互干渉効果の数値計算による確認([G06004]熱工学部門一般セッション(4):着火)

概要

論文の詳細を見る
As a fundamental study on spontaneous ignition of fuel spray, spontaneous ignition of a droplet pair in hot air was numerically studied. Calculation code was developed by the authors, and the effect of inter-droplet interference was investigated. First, the calculation was done without chemical reactions, and only the vaporization behavior was examined. As inter-droplet distance decreases, the vaporization of each droplet was suppressed because of mutual cooling effect. Therefore, in the beginning phase, fuel concentration in the gas phase was lower for shorter inter-droplet distance. However, after a while, the fuel vapor layers around two droplets overlapped, and shorter inter-droplet distance led to higher fuel concentration because of duplicated fuel source. Next, the calculation was done with detailed chemical kinetics. Under a certain condition, it was observed that cool flame appeared on the outer side of the droplet pair, and then propagated into the zone between two droplets.
一般社団法人日本機械学会の論文
2011-09-11