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针对激光等离子体冲击波清洗颗粒技术中的滚动移除机制缺陷,提出一种基于颗粒弹性形变的弹出移除模型。从冲击波与颗粒相互作用出发,考虑冲击波波后气体分子与颗粒的碰撞,结合颗粒弹性储能机制,得到弹出所需要的最小弹性形变高度。根据颗粒弹出所需最低速度和冲击波基本关系式得到满足颗粒弹出要求的冲击波马赫数,结合冲击波波后压强分布特点给出了颗粒弹出所需的外部条件。清洗实验证实了颗粒弹出移除机制的正确性。
In view of the defects of the rolling removal mechanism in the laser plasma shock wave cleaning particle technology, a pop-up removal model based on the particle elastic deformation is proposed. Based on the interaction between shock wave and particle, the collision between gas molecules and particles after the shock wave is considered, and the minimum elastic deformation height required for ejection is obtained by combining the elastic energy storage mechanism of particles. According to the basic relationship between the minimum required velocity of pop-up and the shock wave, the Mach-number of the shock wave satisfying the particle pop-up requirement is obtained. The external conditions required for particle pop-up are given according to the pressure distribution characteristics of the shock wave. Cleaning experiments confirmed the correctness of particle ejection removal mechanism.