基于Design Exploration方法对铁路下导风工程关键设计参数的优化

Optimization of Key Design Parameters of the Aviation Baffle Engineering of Railway Based on Design Exploration Method

应用数值模拟和优化分析方法,对铁路沿线的下导风工程的风沙流场特征进行了系统研究,并对下导风工程的主要影响参数进行了优化分析。结果表明:(1)下导风工程会对风沙来流进行输导,并在导风板下风口一定范围内形成加速区,使来流中的颗粒物以非堆积的形式通过保护区;(2)铁路线路的上部构件会阻碍下导风工程作用效果,在轨道后方形成减速区,造成沙子的沉积;(3)下导风工程布置在铁路两侧时使用较小的导风板倾角和较大的下风口高度,可以减少风沙在铁路附近的堆积,使风沙流顺利通过保护区;(4)导风板水平倾角与铁轨前沙子的质量流率、铁轨道心风速呈正相关,下风口高度与铁轨前沙子的质量流率、铁轨道心风速呈负相关性,下风口高度在影响因素中占主导。

In this paper,the numerical simulation and optimization analysis methods are used to study the characteristics of wind sand flow field of the aviation baffle engineering along:the railway line,and the main influence parameters of the aviation baffle engineering are analyzed.The results show that:(1) The aviation baffle project transports the wind sand flow,and an acceleration zone.forms under the deflector outlet within a certain range,so that the particles flow passes through the protected area in the form of non-accumulation.(2)The upper components of the railway obstruct the effect of the aviation baffle at the rear raft velocity reduction zone,resulting in the deposition of sand.(3)The aviation baffle is arranged on both sides of the railway using a small angle and a large outlet height of the wind guide plate,which can reduce the accumulation of sand in the vicinity of the railway,so that smooth flow passes through the protected area.(4)The horizontal inclination of the wind deflector is positively correlated with the mass flow rate of the sand before the rail and the wind speed of the track.The height of the outlet is negatively correlated with the mass flow rate of the sand before the rail and the track wind speed,and the dominant factor is the height of lower outlet.