Abstract
Aimed at improving efficiency of painting operation in shipbuilding, we investigated behavior of particles in airless spray by using of high speed video camera. An actual airless sprayer was employed for the experiment and silicone oil was used as test fluid. The spray particles with diameter of about over 50 micrometer were visualized by means of backlight method. Two-dimensional velocity vectors of the particle were measured by particle tracking method. We obtained temporal changes in number, direction of motion and velocity of the spray particles, which may affect the painting efficiency.
