微细颗粒高速撞击沟槽结构靶板抗冲蚀行为研究

Study on anti-erosion behavior of target plate with groove structure impacted by micro-particles with high speed

研究颗粒高速撞击固体壁面的相关机理是解决动力装备关键部件颗粒冲蚀和沉积的关键技术基础。基于显式动力学算法,建立了球形颗粒冲击平板、波纹形和圆弧形图案结构靶板的冲蚀模型,研究了颗粒冲击角度、速度以及靶板结构等关键因素对冲蚀行的影响规律。结果表明:在30°~60°内,带有图案结构靶板的平均抗冲蚀性能优于平板结构;入射速度和角度一定的情况下,表征颗粒与靶板曲面关系的特征参数R/r对冲蚀率的影响较为明显;当R/r=10时,圆弧形沟槽结构抗冲蚀性能最优。以上研究为优化靶板表面结构、提高其抗冲蚀性能,提供了一定的理论基础及数据支撑。

The research on the mechanisms of particles impinging on solid wall at high speed is the key technology foundation to solve the problem of particle erosion and deposition of the key components of power equipment.Based on explicit dynamics algorithm,erosion models of spherical particles impacting flat plates,corrugated and arc-shaped target plates were established,and the effects of impact angle,velocity and target plate structure on the erosion behavior of particles were analyzed.The results show that the average erosion resistance of the target plate with patterned structure is better than that of the plate structure in the range of 30°-60°;when the incident velocity and angle are constant,the characteristic parameter R/r,which characterizes the relationship between the particle and the surface of the target plate,has an obvious influence on the erosion rate;when the R/r ratio is 10 times,the erosion resistance of the arc groove structure is the best.The above research provides a certain theoretical basis and data support for optimizing the surface structure of the target plate and improving its anti-erosion performance.