309 位相エンコードレーザー計測法による3D3C速度計測(S42-1 流れの可視化実験解析(1),S42 流れの可視化実験解析)  [in Japanese] 309 3D3C velocity measurement with a phase encoded laser technique  [in Japanese]

A method of 3D-3C velocity measurement by using phase-encode technique is presented in this paper. The intensity ratio of two color laser was related with z-direction. Recording the particle trajectory with 3CCD camera, x-y velocity components was reconstructed by PTV technique. The velocity of z-directions was obtained with calibrated data of relation between the intensity ratio and z-coordinate. The technique was adopted to the rotational Bessel flow. Relatively large particles were used for the measurement. A reasonable velocity field was obtained by using present technique.