G142 ファイバスコープステレオ PIV の開発研究 : 半導体レーザの発光タイミング制御による 3 次元速度検出アルゴリズム

抄録

We developed a three-dimensional particle velocimetry (stereo-PIV) system with optical fiberscopes to measure fluid motion in such as a closed vessel to which extra windows for flow measurement are hardly attached. The present study proposes a processing technique to match a particle with the auto-correlation fitting function in order to reduce the image degradation by fiberscopes transmitting, in conjunction with particle streak images controlling pulse timing of diode laser in order to increase the reliability of vector processing (PTV-SS method). An axial jet flow was selected to validate the present system, which was also measured by using a laser Doppler velocimetry. A bias error due to the image degradation by fiberscopes transmitting was reduced by 95%, therefore and the present system is expected to obtain the accurate velocity-vector field.