抄録
Particle Image Velocimetry (PIV) is a powerful tool in wind tunnel experiments. In this paper, the PIV in the JAXA 2m x 2m transonic wind tunnel is briefly described to show the important points of PIV for high speed air flow. The traceability of the particles is essentially important in PIV for high speed flow. The influence of the response delay of the particles on the velocity measurement and its uncertainty are described with a comparison between PIV and Molecular Tagging Velocimetry (MTV). A correction method for the response delay of the tracer particles is described and the corrected velocity calculated from PIV results are compared with the velocity measured with the MTV.
