Effects of surface roughness on splashing characteristics of large droplets with digital inline holographic imaging

Ice accretion on aircraft wings due to Supercooled Large Droplet (SLD) has a significant impact flight safety. The dynamic behaviours of large droplet, such as deformation, breakup and splashing, have effects icing accretion. corresponding studies been carried out experimentally numerically, empirical models predict the droplets proposed. However, few involve surface roughness effects, especially its secondary during In this paper, an experimental investigation onto surfaces with different was conducted by using high-speed Digital Inline Holography (DIH). rapid splashing processes Weber number around 570 Mundo parameter K 240 were captured reconstructed based wavelet-based algorithm. Results show that DIH is suitable diagnose wide size range record their velocities locations. positive effect dynamics droplets, parameters including diameter, velocity, splash angle, height mass-loss rate rise increase roughness. new correlations characteristics fitted developed, which could be used update current simulation take into account dynamics. This fundamental study may also applied industrial applications wind turbine icing, inkjets, sprays, well erosion formation ice layers.