Interferometic Particle Imaging system for industrial and naval applications

The Hydrodynamic Nuclei Concentration (HDNC) technique is a specialized version of the Interferometric Particle Imaging (IPI) technique. HDNC is a particle characterization technique for naval environments. Particles in the wake of a ship have an important influence to the cavitation behavior of the vessel. Water quality measurements are applied at model basins and on a full scale ferry ship during the project KonKav. One project goal was the determination of scale effects between ship models and the full scale in terms of cavitation prediction. The particle characterizations consist of particle type classifications, bubble size distribution and corrected bubble count concentration calculations. The improvements of the original IPI-Technique allow the application in a wide range of applications like process control and quality management. The hardware setup was simplified compared to commercial versions of the technique. Improvements in the analysis and a comparison with the well-known Phase Doppler Anemometry (PDA) were also investigated.