摘要
Following the fundamental characteristics of the porosity windbreak,this study suggests a new numerical investigation method for the wind field of the windbreak based on the porous medium physical model.This method can transform the reasonable matching problem of the porosity and windproof performance of the windbreak into a study of the relationship between the resistance coefficient of the porous medium and the aerodynamic load of the train.This study examines the influence of the hole type on the wind field behind the porosity windbreak.Then,the relationship between the resistance coefficient of the porous medium,the porosity of the windbreak,and the aerodynamic loads of the train is investigated.The results show that the porous media physical model can be used instead of the windbreak geometry to study the windbreak-train aerodynamic performance,and the process of using this method is suggested.
本文针对孔隙性挡风墙的基本特征,提出了一种基于多孔介质物理模型的挡风墙风场数值研究新方法。该方法将挡风墙孔隙率与防风性能的合理匹配问题转化为多孔介质阻力系数与列车气动载荷关系的研究。首先研究了孔隙类型对孔隙式挡风墙后风场的影响,然后研究了多孔介质阻力系数、挡风墙孔隙率与高速列车气动载荷之间的关系。研究结果表明,可以用多孔介质物理模型代替挡风墙实体几何模型来研究挡风墙-高速列车气动性能,并提出了该方法的应用流程。
基金
Projects(52302447,52388102,52372369)supported by the National Natural Science Foundation of China。
作者简介
Corresponding author:LIN Tong-tong,E-mail:lintongtong@csu.edu.cn,ORCID:https://orcid.org/0009-0003-9455-5807。
