D210 二点光ファイバープローブ計測におけるプローブ先端形状の影響(OS12 温暖化対策とCO2削減技術)

概要

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Optical fiber probing is one of the efficient and reliable measurement methods for the gas-liquid two-phase flows. We already reported the excellent performance in small or medium size bubbles/droplets measurement by using a Four-Tip Optical fiber Probe(F-TOP). In this study, we newly developed a Two-Tip Optical fiber Probe(T-TOP) for the practical purpose of micro droplets measurement. We demonstrate the simultaneous measurement of velocities and diameters of micro droplets using this probe; these results are compared with those obtained from the visualization of the droplets by using high-speed video camera. As results, the difference of measurement results in droplets velocity between T-TOP and visualization is less than 10 %. The difference of measurement results in droplets diameter is less than 20 %. In addition, we discuss the tip shape of Optical Fiber Probe(OFP) for high accuracy measurement.
2009-06-28