ノズル内キャビテーションが液体分裂機構に及ぼす影響

第3報, 2Dノズル内の圧力変動

抄録

The objective of this study is to promote disintegration of liquid jet by cavitation inside the nozzle. In this report, the effects of the pressure variartion inside 2-dimensional (2D) nozzle on behavior of liquid flow and the breakup of issuing liquid are investigated. When the nozzle length/ nozzle width ratio L/W value is large, the pressure inside nozzle decreases at the nozzle inlet, and increases before the middle section is reached, and any disturbance in the liquid flow inside the nozzle decreases in the vicinity of the outlet. When L/W value is small, the injection pressure increases, the pressure that decreased at the nozzle sharp corner part maintains negative pressure until the vicinity of the nozzle outlet. This trend prevents any disturbance due to the generation and disappearance of cavitation from attenuating.