Simulation of Erosion by Particle Impact on a Rough Surface

Abstract

In many industrial conditions, we deal with impact of particles on a surface that can cause premature failure. A series of studies have been conducted to investigate the effect of parameters on this phenomenon on smooth surfaces at micron-scale. But there is no ideally smooth surface at this micron level. Our study investigated the effect of particle parameters on erosion rate on rough surfaces and obtained their diagram in terms of erosion rate. The modeled particle velocity was in a range between 25 and 150 m/s, and particle diameter is in a range between 216 and 1080 lm. In our numerical study, an erosion model that is based on the impact of a single particle on a small area of surface was described. Then, in our experimental study, different zones that are created due to multiple particle impact on large area of surface were identified.

Temporal and spatial evolution of air-spark switch plasma investigated by the Mach–Zehnder interferometer

“…At present, the research on gas spark switch mainly focuses on the numerical calculation and experimental research of its circuit characteristic parameters, the numerical simulation of the main arc of the switching arc and the electrode ablation. [5][6][7][8] With the development of plasma diagnostic techniques, the accurate diagnosis of plasma parameters of gas spark switches has become possible. These new plasma diagnostic techniques help us to better understand the working process of gas spark switches.…”

Tribocorrosion behaviour of 304 stainless steel in different corrosive solutions

“…Although the harm imposed on engineering components by tribocorrosion is undesirable, it is still unavoidable. When metallic components are subject to the impact of particles (erosion) , the flow of liquids (cavitation) , or the contact of solid bodies (sliding and fretting wear) in corrosive environments, synergistic effect due to simultaneously chemical and mechanical attacks is often involved that may be detrimental for the performance of the tribological contacts, and results in premature failure of these components. It is not hard to image that continual friction of the metallic components in corrosive environments can result in accelerated degradation of the physical properties and give rise to irreversible damage.…”