ドップラーグローバル流速計の開発 : 波長安定性が計測精度に及ぼす影響(S19-2 混相流の多次元ビジュアリゼーション(固気・固液), S19 混相流の多次元ビジュアリゼーション)

概要

論文の詳細を見る
DGV (Doppler Global Velocimetry) is a system to measure velocity of particles crossing a laser sheet, by analyzing the scattered doppler shifted frequency of a light sheet. The light frequency shift is very weak because of the very low speed of the particles compared to the speed of light. In order to overcome this problem, an absorption line of the molecular iodine is used: the absorption of iodine depends strongly on the light frequency going through the iodine vapor. By this mean, it is possible to measure the scattered light intensity going through the iodine and normalize it to the scattered light: this ratio gives us the percentage of light absorbed by the iodine and therefore the doppler shifted frequency can be traced back to particle velocity. In this paper, the measurement accuracy of DGV system was discussed from the point of view of the laser mono-mode stability.
一般社団法人日本機械学会の論文
2004-09-04