基于CFD仿真的煤炭港口堆场垛位起尘特性研究*

露天堆放的煤堆是煤炭码头堆场粉尘污染的主要来源。现行港口管理中针对各煤堆除尘作业的实施多依赖经验，未能充分考虑煤堆起尘区域的特点，造成抑尘效果不佳或资源浪费。对考虑外界影响因素变化下的煤炭码头露天堆场散逸性粉尘扩散进行定量研究，以中国北方某煤炭出口码头堆场为例，考虑在不同风速、多种风向入射角(0°、45°、90°)下的多组合试验工况，采用计算流体力学(CFD)软件对各煤堆粉尘扩散进行数值模拟，将具体起尘区域可视化，并计算得到煤堆表面的粉尘扩散量。针对性分析不同位置的煤堆起尘特点，可为相应条件下堆场除尘作业提供理论参考。

Dust emission characteristics of stack in coal terminal storage yards based on CFD simulation

The coal piles stacked in the open yard are the main source of dust pollution in the coal terminal.The implementation of dust suppression for each coal pile in the current port management relies on experience and the characteristics of the dust generation area are not fully considered，resulting in poor dust suppression or wasted resources.Therefore，a quantitative study of fugitive dust diffusion in open yards at coal terminals considering changes in external influences is carried out in this paper.Taking a coal export terminal yard in northern China as an example，multiple combinations of experimental conditions at different wind speeds and various wind incidence angles (0°，45°，90°) are considered.A numerical simulation of the dust diffusion in each pile is carried out using computational fluid dynamics (CFD) software to visualize the specific areas of dust emission and to calculate the amount of dust emissions on the surface of the piles.The characteristics of dust emissions from coal piles at different locations are analyzed specifically providing a theoretical reference for dust suppression operations in the corresponding yard conditions.