高粘性流下液膜からの液滴発生に関する研究(流体工学,流体機械)

概要

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An experimental study of counter current annular two-phase flow of high-viscosity liquid and air in a large diameter pipe was carried out to investigate the inception criterion for entrainment of molten slag droplet in an entrained flow coal gasifier. Liquid film thickness was measured using a high-speed camera for 4 types of liquid with various viscosities and surface tensions. It was clearly shown that the measured average wave amplitude had a good correlation with the gas Reynolds number, and that the predicted critical gas velocity for droplet inception using new formula of wave amplitude had a good agreement with the experimental results under the condition of very low fluid Reynolds number (Re_f≦10). The critical Weber number Wec=1.73 was obtained as inception criterion of droplet entrainment.
一般社団法人日本機械学会の論文
2008-11-25