铁道科学与工程学报2017，Vol.14Issue(5)：957-963,7.
防风抑尘网应用于沙漠铁路风沙防治的数值分析
Numerical analysis on simulating the application of porous fence in sand control of desert railway
摘要
Abstract
The commonly used sand control measure in the wind blown sand section of the Desert railway is to use PE porous fences. Although its sand control effect is very good, but lacks durability. The durability of porous fence is better than that of PE. This paper attempted to investigate porous fences in Desert railways for wind-blown sand prevention and control measures and to optimize the characteristics of its cross sections. The results indicate that the fens with a porosity of 0 and those with a porosity of less than 20% in the vicinity have good shielding effects. The highest reduction rate of air velocity was 93%. The distance that can be covered by the fences with a porosity between 40 and 50% is far more than that covered by fences of the other cross sections, but the shielding effect of the fence is not desired. Considering the shielding effect and the effect of shielding distance, the fence porosity of 20% and 30% is better than that of other cross sections. The folding angle of the butterfly fence is better than the shielding effect of the flat fence. The optimal angle of the butterfly fence is 30° to 50°. A folding angle of 50° of the butterfly fence, which is the upper 25 cm of the one with the porosity of 40%, 100 cm in the middle of the one with the porosity of 30%, the lower part 25 cm of the one with the porosity of 50%. Taking into account the shielding effect, the shielding distance, and the sand reduction capacity are higher than other cross section forms, the functional porous fence porosity heterogeneity is the best form of these cross sections. The reasonable spacing is 26h (h is the height of porous fence) for the desert sand prevention and control of a double porous fence.关键词
防风抑尘网/沙漠/风沙防治/截面形式Key words
porous fence/desert/blown sand control/sectional form分类
交通工程引用本文复制引用
张立群,许振海,董捷,隋孝民..防风抑尘网应用于沙漠铁路风沙防治的数值分析[J].铁道科学与工程学报,2017,14(5):957-963,7.基金项目
河北省重点研发计划资助项目(15275420) （15275420）
