硬质颗粒参数对列车增黏撒砂喷射行为的影响  

Influences of Hard Particle Parameters on Sanding Jetting Behaviorsof Train Adhesion Enhancing

作　　者：岳子恒 张沭玥 叶浩[1] 丁昊昊[1] 郭俊[1] 王文健[1] 刘启跃[1] YUE Ziheng;ZHANG Shuyue;YE Hao;DING Haohao;GUO Jun;WANG Wenjian;LIU Qiyue(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]西南交通大学轨道交通运载系统全国重点实验室,成都610031

出　　处：《中国机械工程》2024年第11期2054-2062,共9页China Mechanical Engineering

基　　金：国家自然科学基金(52272443,52435004);中国中车股份有限公司研究基金(2022CYY006);中央高校基本科研业务费专项资金(2682024CG007)。

摘　　要：为研究颗粒参数对列车增黏撒砂喷射行为的影响,利用可视化检测技术开展不同颗粒粒径、形状和密度下喷射行为试验,分析各因素对喷射速度、扩散角度的影响权重,探究不同颗粒在撒砂装置内部运动特征及影响机理。研究结果表明:随着颗粒粒径、密度的增大,颗粒喷射速度和扩散角度均逐渐减小,不规则颗粒的扩散角度普遍大于近圆形颗粒的扩散角度;喷射速度显著影响因素权重(从大至小)为:粒径、密度;扩散角度显著影响因素权重(从大至小)为:形状、粒径;颗粒粒径和密度与所受气固耦合力成正比,与初始时刻颗粒加速度成反比,不规则颗粒的碰撞次数高于近圆形颗粒的碰撞次数;根据耦合力和动能的变化规律将颗粒运动特征分为加速和稳定两个阶段,初始时刻颗粒加速决定颗粒在稳定阶段所获动能大小。To study the effects of hard particle parameters on sanding jetting behavior of train adhesion enhancing,the visual detection technology was used to conduct jetting behavior tests with different particle sizes,shapes and densities.The influence weights of various factors on jetting velocity and diffusion angle were analyzed,and the movement characteristics and influencing mechanism of particles inside sanding device were explored.The results show that with the increase in the particle sizes and densities,the jetting velocity and diffusion angle gradually decrease.The diffusion angle of irregular particles is generally greater than that of circular particles.The weight of the significant influencing factors on jetting velocity(from the largest to the smallest)is:size,density.The significant influence factor weight of diffusion angle(from the largest to the smallest)is:shape,size.The particle size and density are directly proportional to the gas-solid coupling forces they are subjected to,and inversely proportional to the initial particle acceleration.Irregular particles have a higher number of collisions than those of circular particles.According to the changing law of coupling forces and kinetic energy,the particle motion characteristics are divided into two stages:acceleration and stability.At the initial moment,the particle acceleration determines the amount of kinetic energy that the particles may achieve in the stable stage.

关 键 词：增黏硬质颗粒 喷射速度 扩散角度 气固两相流仿真 颗粒运动特征 

分 类 号：TH117.1[机械工程—机械设计及理论]