薄い液体金属浴における浸漬ガスジェットの観察

概要

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A study has been made of the behavior of gas jet injected into a thin sheet of mercury (i.e., a "two-dimensional" cnvironment). The vessel was made of acrylate resins. The sheet of mercury was 0.5 cm in thickness. Nitrogen gas (580∿3200 cm^3/s) was injected into the mercury bath through an orifice of 0.2 cm in diameter. The gas jet behavior was observed by using a high speed camera. It is observed that, when jetting occurs, many tiny droplets are formed in the gas jet at the orifice exit. The present result for bubbling-jetting transition agrees well with the previous data obtained by three-dimensional bath. It is shown that the jetting behavior is determined exclusively by the gas-flow velocity. The injected gas does not form a continuous gas channel even in the sonic velocity region. The injected jet breaks up at some distance from the orifice exit, leaving a gas jet residual. The minimum length of the gas jet residual is fixed for each gas-flow velocity. Thus, it has been found that the gas phase forms a small continuous jet extending from the orifice exit to the top of the jet residual.
社団法人日本鉄鋼協会の論文
1982-01-01