対向環状噴流の研究 : 流れ場の分類と基礎的特性

概要

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The annular jet has been characterized by a doughnutlike recirculating flow formed just at the downstream end of the annular nozzle. The behaviour of the recirculating flow governs the flow field when placing two annular nozzles in opposition, according to a distance L between the annular nozzles. In this study, first, the flow field was divided into three regions, varying the distance. Second, fundamental characteristics of these regions were studied using air and water as working fluids. The flow field in the region of small L was stable and an impinged surface was formed. That in the region of intermediate L was unstable and that in the region of large L was out of the scope of interest for the authors. It was ascertained that the flow fields of the annular opposed jets were closely correlated with that of an annular impinging jet.
一般社団法人日本機械学会の論文
1991-12-25