液体中 2 孔オリフィスからの吹込みガスジェットの相互作用

概要

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A study has been made of the interaction between gas jets from two orifices in liquid by using a high speed cinecamera. Nitrogen was injected into a mercury bath through two orifices of 0.1cm in diameter (d_o) located at the transparent vessel bottom. The distance between the two orifices (L) was varied from 0.2 to 2.0cm. Additionally, experiments were done of helium injection into the water bath through two orifices (d_o=0.2cm, L=0.6∿4.0cm). The bubbling behavior at two orifices has been classified into three patterns. "Coalescing" : two adjacent bubbles growing at the orifice exits coalesce into one. "Contacting" : the adjacent bubbles contact without coalescing. "No contacting" : the adjacent bubbles do not contact. "Coalescing" occurred more frequently with decreasing L, while "no contacting" time fraction increased with increasing L. The time fraction for "contacting" increased to a maximum and then decreased, as L increased. The jetting behavior at two orifices was found to be strongly influenced by L. In certain ranges of L, jetting at two orifices occurred more frequently than in the case of a single orifice. A theoretical model is given to explain the interaction between gas jets from two orifices in liquid.
社団法人日本鉄鋼協会の論文
1987-09-01