Effect of structure parameters on solid particle erosion resistance coupled biomimetic anti-erosion functional surface: A CFD-DPM investigation

Abstract

In this study, the effect of structure parameters on solid particle erosion resistance coupled biomimetic surface was investigated, revealing the optimal structural parameters that minimized erosion. A calculation process of erosion characteristics using computational fluid dynamics (CFD) was developed to simulate the erosion physical process. Results indicated that as the bump diameter and the groove width increased, the erosion rate of the biomimetic surface decreased for a given particle size, but the influence of groove width was greater than that of bump diameter. For a given particle size, as the groove width-to-depth ratio increased, the erosion rate of the biomimetic surface decreased initially and then increased, with an optimal value between 2.5 and 3 that yielded the lowest erosion. Additionally, changes in particle collision velocity were primarily governed by the vortex scale and intensity within the groove, while changes in particle collision angle were mainly influenced by the groove scale and angle.