摘要
针对抓斗卸料过程中物料会产生粉尘扩散的问题,文中采用CFD-DEM双向耦合仿真模拟结合实验的方法分析了卸料时粉尘时空分布情况,进一步研究粉尘颗粒运动规律,同时采用测量仪器对料斗口诱导气流风速以及粉尘浓度进行测量研究。结果表明:料斗口逸出粉尘最大风速为0.69 m/s,料斗口周围粉尘浓度最大达到754.83 mg/m^(3),小粒径粉尘在卸料20 s之后以较低速度悬浮在空气中。
Considering that dust will be generated during the grab unloading process,in this paper,the time and space distribution of dust during unloading is analyzed by CFD-DEM two-way coupling simulation combined with experiments,and the movement law of dust particles is further studied.In addition,the wind speed and dust concentration of induced airflow at the hopper mouth are measured by measuring instruments.The results show that the maximum wind speed of dust escaping from the hopper mouth is 0.69 m/s,the maximum dust concentration around the hopper mouth reaches 754.83 mg/m^(3),and the dust with small particle size is suspended in the air at a small speed after 20 s of unloading.
作者
苏东波
孟文俊
张汉中
Su Dongbo;Meng Wenjun;Zhang Hanzhong
出处
《起重运输机械》
2024年第17期24-31,共8页
Hoisting and Conveying Machinery
基金
国家自然科学基金资助项目(52075356)。
关键词
抓斗卸料
CFD-DEM耦合
粉尘浓度
产尘机理
grab unloading
CFD-DEM coupling
dust concentration
dust generation mechanism
