Effect of groove microstructure on slurry erosion in the liquid-solid two-phase flow

Different from the traditional research and design of new materials and coatings, three types of surface microstructures including V-shape, U-shape, and ring-shape groove microstructures were performed to enhance the slurry erosion resistance. Slurry erosion experiments were carried out on a home-made rotating disc erosion rig on the conditions of the velocity of 8.25 m/s and sand containing 5 wt%. Mass loss measurements, micro morphology, and roughness observation combined with flow field analysis were employed to reveal the erosion mechanism. The results showed that the erosion rate of the V-shape groove microstructure was approximately 69% and 93% of the U-shape, and ring-shape groove microstructures respectively. The most severe slurry erosion occurred on the incident flow surfaces of the V-shape and U-shape grooves, and the bottom surface of the ring-shape groove. Vortex flow in the grooves contributed to the erosion difference on the grooved surfaces and the top surface in the way of changing impingement velocity and angle.

Automated summary

In contrast to traditional research on new materials and coatings, this study utilized various surface microstructures, such as V-shape, U-shape, and ring-shape grooves, to enhance slurry erosion resistance. Experimental results showed that the V-shape groove microstructure had lower erosion rates compared to the U-shape and ring-shape grooves, with vortex flow playing a significant role in different erosion patterns on grooved surfaces.