気流微粒化による噴霧の運動特性に関する研究 : 第2報, 同軸気流噴射弁噴口近傍の分裂現象および噴霧特性

概要

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The spray characteristics in the vicinity of an atomizer are very important for ignition and flame holding in spray combustion, but they remain largely unknown because the spray measurements are very difficult to perform by conventional methods alone due to small drop size, high drop velocity and high spray concentration. In this paper, the spray characteristics in the vicinity of the air blast atomizer and the liquid disintegration mechanism were investigated using the phase/Doppler particle analyzer, a contact probe method and photographs. The liquid disintegration mechanism can be classified into three types by the contribution of ligaments to the breakup of liquid. The maximum drop size decreases and small drops increase as one moves downstream. The drop velocity increases as axial distance increases, and as radial distance increases in the region near to the spray axis. The radial distribution of the number density of spray drops has a sharp peak in the region near to the atomizer, and it becomes flat as it moves downstream.
一般社団法人日本機械学会の論文
1991-12-25