基于Design Exploration方法对铁路下导风工程关键设计参数的优化
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摘要
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 flowfield of the aviation baffle engineering along the railway line, and the main influence parameters of the aviation baffle engineering are analyzed. The results showthat:(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 flowpasses 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 rail 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 flowpasses through the protected area.(4) The horizontal inclination of the wind deflector is positively correlated with the mass flowrate of the sand before the rail and the wind speed of the track. The height of the outlet is negatively correlated with the mass flowrate of the sand before the rail and the track wind speed, and the dominant factor is the height of lower outlet.
In this paper, the numerical simulation and optimization analysis methods are used to study the characteristics of wind sand flowfield of the aviation baffle engineering along the railway line, and the main influence parameters of the aviation baffle engineering are analyzed. The results showthat:(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 flowpasses 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 rail 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 flowpasses through the protected area.(4) The horizontal inclination of the wind deflector is positively correlated with the mass flowrate of the sand before the rail and the wind speed of the track. The height of the outlet is negatively correlated with the mass flowrate of the sand before the rail and the track wind speed, and the dominant factor is the height of lower outlet.
引文
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[18]铁道部第一设计院.特殊条件下路基[M].北京:人民铁道出版社,1978:204-205.
[2]李生宇,雷加强.草方格沙障的生态恢复作用---以古尔班通古特沙漠油田公路扰动带为例[J].干旱区研究,2003,20(1):7-10.
[3]Huang N,Xia X,Tong D.Numerical simulation of wind sand movement in straw checkerboard barriers[J].European Physical Journal E,2013,36(9):99.
[4]Cheng J J,Lei J Q,Li S Y,et al.Effect of hanging-type sand fence on characteristics of w ind-sand flow fields[J].Wind&Structures An International Journal,2016,22(5):555-571.
[5]屈建军,井哲帆,张克存,等.HDPE蜂巢式固沙障研制与防沙效应实验研究[J].中国沙漠,2008,28(4):599-604.
[6]Cheng J J,Lei J Q,Li S Y,et al.Disturbance of the inclined inserting-type sand fence to w ind-sand flow fields and its sand control characteristics[J].Aeolian Research,2016,21:139-150.
[7]景文宏,程建军,蒋富强.轨枕式挡墙挡风沙功效的数值模拟及试验研究[J].铁道科学与工程学报,2016,13(1):46-54.
[8]Lima I A,Araújo A D,Parteli E J,et al.Optimal array of sand fences[J].Scientific Reports,2017,7:45148.
[9]H.A.波得普梁夫.铁路防沙[M].北京:人民铁道出版社,1958.
[10]P.C.查基洛夫.沙漠铁路[M].兰州:铁道部科学研究院西北研究所,1984.
[11]中国科学院兰州冰川冻土沙漠研究所.沙漠的治理[M].北京:科学出版社,1976.
[12]刘贤万,凌裕泉,贺大良,等.下导风工程的风洞实验研究---[1]平面上的实验[J].中国沙漠,1982,2(4):14-21.
[13]刘贤万,凌裕泉,贺大良,等.下导风工程的风洞实验研究---[2]地形条件下的实验[J].中国沙漠,1983,3(3):25-34.
[14]辛国伟,程建军,杨印海.铁路沿线挂板式沙障开孔特征与风沙流场的影响研究[J].铁道学报,2016,38(10):99-107.
[15]辛国伟,程建军,景文宏,等.来流廓线对风沙流场和风沙堆积影响的数值模拟---以挡沙墙为例[J].干旱区研究,2016,33(3):672-679.
[16]王康龙,武建军,罗生虎.风沙运动的欧拉双流体模型参数研究[J].中国沙漠,2014,34(6):1461-1468.
[17]庞巧东,刘建军,程建军,等.戈壁铁路挡风墙背风侧涡流长度及积沙的研究[J].石河子大学学报:自然科学版,2011(5):629-632.
[18]铁道部第一设计院.特殊条件下路基[M].北京:人民铁道出版社,1978:204-205.