摘要
湿式抛丸是一种新的环境友好型钢铁表面去除氧化皮技术。采用Fluent软件中的DDPM(稠密离散相模型)仿真分析了干式和湿式抛丸过程中颗粒在抛丸器中的运动规律。在仿真过程中,将空气与水看作连续相,颗粒看作离散相,使用KTGF(颗粒动力学理论)分析和研究了颗粒之间的相互作用。通过对干式和湿式抛丸过程中颗粒在抛丸器中的运动仿真分析表明:两种抛丸条件下颗粒飞离分丸轮窗口的速度相近;在湿式抛丸条件下,提高分丸轮的转速、增大入口处水的体积分数可以减小颗粒与定向套的碰撞;湿式抛丸的颗粒出口速度低于干式抛丸颗粒出口速度,并且,其速度差随叶片转速的增大而增大;在一定范围内,增大进口处水的体积分数可以降低颗粒的出口速度。
Wet shot blasting is a new environmentally friendly technology for removing the oxide skin from steel.DDPM (Dense Discrete Phase Model) in Fluent software is used to simulate and analyze the motion law of particles in the dry and wet shot blasting machine during the shot blasting process. In the simulation process, the air and water are regarded as continuous phase, and the particles are regarded as discrete phase. KTGF(Kinetic Theory of Granular Flows) is used to deal with the interaction between particles. Through the simulation and analysis of motion of particles in the dry and wet shot blasting machine during the shot blasting process , the following conclusions are drawn: The velocities that particles fly away from the distributor of two kinds of shot blasting are very close;Under wet shot blasting condition, increasing the speed of the distribution and the volume fraction of water at the inlet can reduce the collision between the particles and the directional sleeve;The particle outlet velocity of wet shot blasting is lower than that of dry shot blasting, and the difference increases with the increase of blade speed;In a certain range, increasing the volume fraction of water at the inlet can reduce the outlet velocity of the particles.
作者
徐高杰
高志
XU Gao-jie;GAO Zhi(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)
出处
《机械设计与制造》
北大核心
2019年第7期168-171,共4页
Machinery Design & Manufacture
