A-11 燃料噴射弁近傍における液膜挙動と微粒化特性に関する研究(微粒化・噴霧燃焼,一般講演)

概要

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Aiming at elucidating the relationship between injection conditions, especially injection velocity profiles, and atomization characteristics of liquid sheet, experimental measurement, numerical and theoretical analysis were carried out. Liquid spacial distribution produced by atomization of axisymmetric sheet, which was created by collision of two water jets in opposite direction, was experimentally obtained utilizing spray collector. The amplitude of the liquid sheet oscillation was theoretically developed. The numerical results of atomization process through Kelvin-Helmholtz type instability showed qualitative resemblance with corresponding experimental results and theoretical analyses. It was clarified that non-uniform injection velocity profile resulted in velocity distribution with inflection point inside the sheet, thus the sheet became unstable and enhanced atomization. The effect of injection velocity profile on atomization of plane liquid sheet was also clearly represented.
公益社団法人日本ガスタービン学会の論文
2009-10-21