冷喷涂粒子临界速度的数值模拟现状

Numerical Simulation Status of Critical Velocity of Cold Spray Particles

冷喷涂是一种近年来发展起来的材料表面防护方法,如何更加有效的利用喷涂技术更好、更高效的实现材料的表面防护,受到各国学者的关注和研究。在喷涂过程中,因为粒子与基体碰撞过程时,速度快、温度高、塑性变形大,所以碰撞的瞬态过程难以在实验中实际测量。随着数值模拟技术的发展,国内外学者通过模拟的方法对这一过程进行了探究,并得到了一系列具有实际指导意义的结论,很好地指导了实验。综述了国内外学者探究碰撞瞬态过程中的模拟算法、临界速度的判断方法和影响因素,以及临界速度的计算方法,并对其发展前景进行了展望。

Cold spray coating is a kind of material surface protection method developed in recent years.How to make better and more efficient use of spraying technology to realize the surface protection of materials has attracted the attention and research of scholars all over the world.In the spraying process,because of the high speed,high temperature and large plastic deformation,the transient process of the collision is difficult to be measured in the experiment.With the development of numerical simulation technology,scholars in China and abroad have explored this process by means of simulation,and have obtained a series of practical guiding conclusions,which have well guided the experiment.The simulation algorithm,critical in China discrimination methods and factors of critical velocity,and the calculation method of critical velocity of scholars in China and abroad exploring the transient process of collision were reviewed,and the development prospect was prospected.