Abstract
A combined technique of simultaneous measurements of size and 3D velocity components of droplets in a spray has been proposed. This technique is based on the optical technique of glare points observation and stereoscopic PIV (SPIV). The size of droplet is obtained by the interval of the glare points generated by the direct reflection and the 1st refraction from the droplet illuminated by Nd : YAG laser (532nm). The 3D velocity components of droplets are measured by using SPIV based on the images of distribution of the glare points. The optical arrangement for this simultaneous measurements has been devised and the feasibility and capability of the technique was confirmed by applying to size and velocity field measurements of a spray issuing from a swirl fuel nozzle being used in a gas turbine.
