光ファイバープローブによる気泡計測に関する研究 : 第2報,気泡界面速度と弦長の同時計測(流体工学,流体機械)

概要

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To improve the probe methods to characterize bubbles and/or the interface between gas and liquid phases in multiphase flows, a single optical fiber probe with a wedge-shape tip have been developed. For the analysis of signals, the contacting process of a single bubble and the probe is elcidated using visualization by high-speed video cameras and digital image processing. Comparing both the motion of center of gravity and the interfacial motion of the bubbles with those of free rising bubbles, the presence of the probe has few influences on the motions. The measured values by the probe are compared with those obtained by visualization and digital image analysis. On the basis of these results, it is demonstrated that one can simultaneously measure interfacial velocity and chored length of bubbles by our probe.
2002-10-25