挡风抑尘墙多孔介质模型分析与数值模拟

Numerical Simulation and Analysis of Porous Medium Model for Wind-Proof and Suppressing Wall

气体通过挡风抑尘墙的流动是典型的多孔介质．纯流体耦合流动，多孔介质模型能够良好的反映其工作特性。墙体的质量通量和压力降与墙体开孔率、高度及自然风速有直接的关系，随着开孔率的增大，其质量通量增大，压力降减小；随着墙体高度的增大，其质量通量也增大，压力降增大；随着自然风速的提高，其质量通量也增大，压力降增大。较适宜的墙体高度为受保护料垛高度的1．5～2倍，开孔率为0．2～0．3。

The wind pass the wind-proof and suppressing wall is a typical porous media-fluid coupled flow, the porous medium model can show its working characters well. The opening ratio, the height of the wall and the velocity of the wind can influence the mass flow rate and pressure drop directly. The mass flow rate raise and the pressure drop decrease with the raise of opening ratio; The mass flow rate and pressure drop both raise with the raise of the wall height and the wind vdocity. The preferable height of the wall is about 1.5 to 2 times of the height of protected open-air depot, the preferable opening ratio is 0.2 to 0.3.