Particle characterization system for industrial and naval applications

The Interferometric Particle Imaging (IPI) technique was modified and adapted to provide particle size and particle concentration measurements in harsh environments. The development was forced by the challenge of nuclei concentration measurement in cavitation tunnels and full scale measurements in the wake flow of a vessel. Because only bubbles act as cavitation nuclei, discrimination between bubbles and other solid particles in the multi-phase flow is necessary. The size measurement and classification and can be realized by defocussed imaging and analysis of the scattered light from particles. A few measurement results demonstrate the feasibility of the new developed Nuclei Concentration Measurement (HDNC) technique and there advantages in terms of robustness, moderate hardware effort and reduced measurement time.