垂直管内気液二相スラグ流の気泡流化装置の開発 : 第2報,最小気泡流区間長さとスラグ流への帰還過程に対する一考察

概要

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In the previous paper, a flow pattern converter composed of five stages of porous plates was devloped. Three kinds of sintered porous plates of spherical particles were selected for the converter under fixed gas and liquid flow rates. In this paper, a diagram is proposed to predict a minimum length of the bubbly-flow region for arbitrary gas and liquid flow rates and three kinds of porous plates. A distribution of the area-averaged void fraction and fluctuation of the void fraction in the downstream of the converter were measured to improve the performance of this converter and to predict the location at which a large bubble is regenerated. This prediction includes an attempt to clarify the mechanism of transition from bubbly flow to slug flow. It was confirmed that fluctuation of the void fraction played an important role in the transition from bubbly flow to slug flow.
1990-01-25