垂直平板に沿って上昇する空気-水系気泡壁噴流の気泡特性

抄録

An air-water bubbling jet was generated along a vertical flat plate.Bubble characteristics represented by bubble frequency, void fraction, mean bubblerising velocity, and mean bubble chord length were measured with a two-needleelectro-resistivity probe. The horizontal distributions of the bubble frequency andvoid fraction followed their respective similar distributions in the vertical regionwhere the buoyancy force acting on bubbles governs the flow field. Empiricalequations were proposed for the horizontal distributions of the bubble frequency andvoid fraction both in the directions perpendicular to and parallel to the vertical flatplate. In the same vertical region the horizontal distributions of the mean bubblerising velocity and mean bubble chord length remained almost unchanged in thevertical direction except in the close vicinity of the wall.