Li Xue, Xie Jun, Dong Ming, Chen Sheng, Dong Wenjie
School of Optical Information and Energy Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, China.
ACS Omega. 2024 Feb 22;9(9):10459-10467. doi: 10.1021/acsomega.3c08519. eCollection 2024 Mar 5.
Collisions between particles or with a surface have been widely applied, in which the restitution coefficients are the important parameter to describe the particle rebound behavior. SiO particles are often used instead of ash particles in theoretical analyses; however, whether this is justifiable has not been confirmed. This paper compares the rebound characteristics of oblique impact for SiO particles and ash particles by experimental and theoretical analyses. Based on the rigid-body theory, the tangential restitution coefficients, rebound angle-particle center, and reflection angle-contact path predicted by SiO particles are basically in agreement with the experimental results for ash particles, especially at large impact angles. However, there is a slight error at 2.2 m/s as the velocity approaches the critical capture velocity.
颗粒之间或与表面的碰撞已得到广泛应用，其中恢复系数是描述颗粒反弹行为的重要参数。在理论分析中，常使用SiO颗粒代替灰颗粒；然而，这是否合理尚未得到证实。本文通过实验和理论分析比较了SiO颗粒和灰颗粒斜向碰撞的反弹特性。基于刚体理论，SiO颗粒预测的切向恢复系数、反弹角-颗粒中心和反射角-接触路径与灰颗粒的实验结果基本一致，尤其是在大冲击角时。然而，当速度接近临界捕获速度2.2 m/s时存在轻微误差。
