単一蒸気泡の水中凝縮に関する研究 : 第2報,実験的解析

概要

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Experimental analyses were performed for the results of flow visualization as shown in the 1st report, in which saturated steam bubbles of approximately 10 mm in diameter were injected into a quiescent subcooled water environment. The patterns of bubble collapse were analyzed through photographs selected from a motion picture film and presented as the instantaneous bubble diameter vs time. An upward motion was imparted to the bubbles by bouyancy, and owing to heat transfer and condensation at the liquid-vapor interface, the bubbles diminished in size as they ascended. The time variations of the bubble diameter and position were determined from a detailed analysis of the photographs. The experiments were performed for pressure levels from atmospheric to 10^6 Pa and for temperature differences between the saturated steam and water for subcooled 10-70℃. From these, results were deduced for the time for bubble collapse, and average heat transfer coefficient. Dimensionless correlations desired by Brucker et al, were assured for a variety of the aforementioned quantities.
社団法人日本機械学会の論文
1988-07-25