Study on applicability of microgroove erosion mitigation method based on stress–erosion coupling simulation

Abstract

Consideration of stress concentration is inevitable for local areas with a geometry discontinuity; therefore, this study was focused on the erosion mitigation performance of microgroove structures under the coupling of an applied stress and fine particle erosion. First, a modified stress-accelerated erosion model with high accuracy was developed. Subsequently, the erosion characteristics of microgrooves with different surface textures (rectangular, V-shape, and elliptical groove) were carefully studied based on the established multiphysics coupling simulation method. The effects of various parameters—groove width to groove depth ratio, incident angle, and magnitude of the applied stress—on erosion were also systematically investigated. The results showed that the impact angle and the applied stress had major effects on the erosion rates of the microgroove structures and that a rectangular groove was more suitable for stressed structures affected by erosion damage compared to the other groove types.