露天矿自卸卡车车速对粉尘扩散的影响研究

发布时间：2018-04-17 17:42

本文选题：动网格技术 + 自卸卡车　；参考：《中国安全科学学报》2017年04期

【摘要】：为准确描述露天矿自卸卡车运输扬尘的动态三维流场,采用动网格技术及离散相模型的粒子跟踪技术的耦合计算方法,模拟不同车速下自卸卡车周围气流与粉尘的分布特征,并进行现场实测。分析结果表明,粘附在路面的积尘是露天矿运输扬尘的发尘源,气流紊动扩散产生的剪切气流和诱导气流是粉尘颗粒飞扬的动因;随着时间的推移,大部分未来得及沉降的粉尘颗粒在卡车后方飞扬,道路粉尘质量浓度为418~956 mg/m~3;随着自卸卡车车速的提高,近地面粉尘质量浓度与扬尘高度均增大。胜利东2号露天矿现场实测显示,运输扬尘污染情况严重,粉尘质量浓度高达1 932.2 mg/m~3,各测试端面的实测值和模拟值相对误差小于6.64%。
[Abstract]:In order to accurately describe the dynamic three-dimensional flow field of dump truck dust transport in opencast mine, the dynamic grid technique and the particle tracking method based on discrete phase model are used to simulate the distribution characteristics of air flow and dust around the dump truck at different speeds.Field measurement was carried out.The results show that the dust deposited on the road is the dust source of dust transport in opencast mines, and the shear flow and induced air flow caused by turbulent diffusion of air flow are the driving forces of dust particles flying, and with the passage of time,Most of the dust particles which have not been settled in time fly in the rear of the truck, and the mass concentration of dust on the road is 418 ~ 956 mg / m ~ (-3). With the increase of the speed of dump truck, the dust concentration and dust height near the ground increase.The field measurement of Shengdong No. 2 opencast mine shows that the pollution of transport dust is serious, the dust concentration is as high as 1 932.2 mg / m ~ (3), and the relative error between the measured value and the simulated value of each test face is less than 6.64%.
【作者单位】：辽宁工程技术大学安全科学与工程学院;辽宁工程技术大学安全工程技术研究院;
【基金】：国家自然科学基金资助(51274116)
【分类号】：TD57;TD714

【相似文献】