二点光ファイバープローブによる液滴計測におけるプローブ先端形状の影響(<特集>第14回動力・エネルギー技術シンポジウム)

概要

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Optical fiber probing is one of 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 tiny droplets measurement. We demonstrate the simultaneous measurement of the velocities and diameters of tiny droplets using this probe; these results are compared with those obtained from the visualization by using a high-speed video camera. As a result, the differences of measurement results in droplets velocity between T-TOP and visualization are less than 10%. The differences of measurement results in droplets diameter is less than 20%. Based on the results, we discuss the tip shape of Optical Fiber Probe (OFP) for the purpose of highly accurate measurement.
2010-03-25