矿石堆场抑尘网对不同风速折减效果的数值分析  

Numerical analysis of reduction effect of dust suppression net in ore storage yard on different wind velocities

作　　者：陈磊 李松 赵华山 尹崇志 刘文祎 郭金玲 CHEN Lei;LI Song;ZHAO Hua-shan;YIN Chong-zhi;LIU Wen-yi;GUO Jin-ling(Qingdao Port Dongjiakou Ore Terminal Co.Ltd.,Qingdao 266400,China)

机构地区：[1]青岛港董家口矿石码头有限公司,山东青岛266400

出　　处：《水运工程》2023年第2期23-28,共6页Port & Waterway Engineering

摘　　要：针对开放性矿石堆场在外力作用下极易造成颗粒扬尘污染的问题,对防风抑尘网在不同来流下的风速折减效果进行研究。应用Fluent提供的RNG k-ε模型对抑尘网后的流场进行数值模拟,结合实测数据建立三维模型,计算不同来流条件下料堆表面速度的分布情况。模拟结果表明:1)气流经过抑尘网孔隙梳理后,在抑尘网后存在明显的旋涡回流区,进而改变料堆表面空气流动结构,有效降低料堆表面速度。2)速度综合折减率为23.52%。不同方向来流的情况下,旋涡回流区覆盖堆场的面积不同。速度综合折减率具有显著差异性,差异幅度为7.69%~50.87%,北西北、北东北来流衰减作用尤为显著。To address the problem that open ore storage yards are highly likely to cause particle dust pollution under the action of external forces, this paper investigates the wind velocity reduction effect of the windproof and dust suppression net on different incoming flows. Specifically, the paper numerically simulates the flow field behind the dust suppression net with the renormalization group(RNG)k-ε model provided by Fluent. Then, it builds a three-dimensional model based on measured data to calculate the velocity distribution on the stockpile surface under different incoming flows. The simulation results suggest the following conclusions: 1)After the airflow is combed by the pores of the dust suppression net, an obvious vortex backflow area emerges behind the dust suppression net. It changes the airflow structure on the stockpile surface, thereby effectively reducing the velocity on the stockpile surface. 2)The comprehensive velocity reduction rate is 23.52%. The area of the storage yard covered by the vortex backflow area varies with the direction of the incoming flow. The comprehensive velocity reduction rate differs significantly, and the difference range is 7.69%-50.87%. The attenuation of north-northwest and north-northeast incoming flows is particularly prominent.

关 键 词：抑尘墙 露天堆场 紊流度 风速折减 

分 类 号：U658.3[交通运输工程—港口、海岸及近海工程] X820.3[交通运输工程—船舶与海洋工程] TM7[环境科学与工程—环境工程]