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Numerical Analysis of Air Vortex Interaction with Porous Screen

机译：多孔筛网空气涡流相互作用的数值分析

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In many industrial applications, a permeable mesh (porous screen) is used to control the unsteady (most commonly vortex) flows. Vortex flows are known to display intriguing behavior while propagating through porous screens. This numerical study aims to investigate the effects of physical properties such as porosity, Reynolds number, inlet flow dimension, and distance to the screen on the flow behavior. The simulation model includes a piston-cylinder vortex ring generator and a permeable mesh constructed by evenly arranged rods. Two methods of user-defined function and moving mesh have been applied to model the vortex ring generation. The results show the formation, evolution, and characteristics of the vortical rings under various conditions. The results for vorticity contours and the kinetic energy dissipation indicate that the physical properties alter the flow behavior in various ways while propagating through the porous screens. The numerical model, cross-validated with the experimental results, provides a better understanding of the fluid–solid interactions of vortex flows and porous screens.
机译：在许多工业应用中，渗透网格（多孔屏）用于控制不稳定（最常见的涡旋）流动。已知涡流流显示通过多孔屏幕传播的同时显示有趣行为。该数值研究旨在研究诸如孔隙度，雷诺数，入口流量尺寸和与屏幕上的屏幕的距离的物理性质的影响。仿真模型包括活塞 - 缸涡旋环发电机和由均匀布置的杆构造的可渗透网格。已经应用了两种用户定义的函数和移动网格的方法来模拟涡旋振铃生成。结果表明了各种条件下涡卷环的形成，演化和特征。涡度轮廓的结果和动能耗散表明物理性质以各种方式改变流动行为，同时通过多孔屏幕传播。用实验结果交叉验证的数值模型提供了更好地理解涡流流动和多孔屏的流体固体相互作用。

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