ノズルから発生する単一気泡列の挙動に及ぼす発生頻度および気泡径の影響(流体工学,流体機械)

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The effects of both generation frequency and bubble diameter on the behaviors of single bubble chains in stagnant water were experimentally investigated. We developed the bubble generator equipment to control precisely both bubble generation frequency and bubble diameter, independently. Bubbles were generated with diameters from 1.0 mm to 2.5 mm, and generation frequencies from 1 Hz to 20 Hz. We investigated bubble chain patters developments in stagnant water, by taking both generation frequency and diameter as parameters. Two types of bubble chain patterns were investigated carefully. The first type was the bubbles rising in zig-zag or helical. In this case the behaviors of bubbles with l/d>100 (l : mutual distance d : diameter) were observed to be identical to those of single bubbles, on the contrary, those of bubbles with l/d<50〜100 were influenced by the interaction by the other bubbles. The second type was the bubbles rising in line. The behavior of bubbles with l/d>200 were indistinguishable from those of single bubble.
一般社団法人日本機械学会の論文
2003-02-25