风速对草方格沙障防沙效果的影响研究

The Influence of Wind Speed to Sand Control Effect of Grass Grid Sand Barrier

为探究沙漠地区风速对草方格沙障防沙效果的影响,采用Fluent-EDEM耦合进行数值仿真,建立了草方格沙障数值模型,研究了风速、草方格高度、草方格间距等不同因素对草方格沙障防沙效果的影响,并建立了跃迁率-风速拟合模型,直观地展现了风速与跃迁率的关系。研究结果表明,草方格沙障跃迁率随风速的增大而增大,跃迁率-风速变化曲线较好地符合三次函数关系。考虑到不同工程现场情况的差异,相关专业人员可参考跃迁率-风速拟合模型选取合适的草方格沙障规格。

In order to explore the influence of wind speed to the sand control effect of grass grid sand barrier in desert area,the paper established a numerical model of grass grid barrier,studied the influence of different factors including wind speed,the height of grass grid and the spac⁃ing of grass grid to the sand control effect of grass grid barrier and established a transition rate⁃wind speed fitting model which could intuitively show the relationship between wind speed and transition rate by using the numerical simulation of Fluent-EDEM coupling.The outcomes show that the transition rate of grass grid sand barrier increases with the increase of wind speed and the variation curve of transition rate⁃wind speed is in good agreement with the cubic function relation.Considering the difference of different project site conditions,relevant professionals can refer to the transition rate⁃wind speed fitting model to select the appropriate specifications of grass grid sand barrier.