In order to study the acceleration process of projectiles in the shot blaster, Discrete Element Method was used to establish the discrete element model of the shot blaster. With the help of the 3D discrete element software EDEM, this thesis points out the main factors that affecting the movement of projectiles by observing the movement of projectiles in the shot blaster. The results show that the movement of projectiles in the shot blaster can be divided into three phases: the gravity acceleration period, the rapidly acceleration period and the stable blasting period; the throwing velocity of projectiles are positively correlated with the pellet wheel rotating speed, the blade length and the projectile particle size, and are independent of the initial velocity; the initial velocity and the projectile particle size can effectively shorten the acceleration phase of projectiles, while the pellet wheel rotating speed and the blade length have no significant effect on every phase of projectiles acceleration.
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