中国铁道科学2017，Vol.38Issue(6)：16-23,8.DOI:10.3969/j.issn.1001-4632.2017.06.03
铁路沿线下导风板对风沙流场的控制规律
Control Law of Lower Air Deflector for Sand Flow Field along Railway
摘要
Abstract
In order to reveal the transport effects and control mechanisms of the lower air deflector on the wind-driven sand conveyance engineering measures along railway line in sandy area,and according to the three-dimensional numerical analysis and the measured data of the sedimentation of lower air deflector,the control rules of the lower air deflector were analyzed in detail based on CFD (Computational Fluid Dynamics) calculation principle.Results show that the sediment transport capacity of the lower air deflector has better effect at higher wind speed (more than 12 m · s-1).Moreover,the sediment transport capacity of the forward inclined lower air deflector is obviously stronger than that of vertical lower air deflector.Field measurements also show that after using the sediment transport measure with forward inclined lower air deflector,a stronger gale zone is formed on the road (action area).The annual sediment deposition in each section of the windward section of the line is significantly reduced.The amount of sediment in the line decreases by 56％,the amount of sediment before the lower air deflector decreases by 44％ and the amount of sediment behind the lower air deflector decreases by 36％.The measured results are consistent with the numerical ones.It is suggested that the lower air deflector be adopted to control railway sand disaster along the railway line in sandy area.The layout of the lower air deflector should be in accordance with the local conditions and take into account the local wind conditions (wind direction and wind speed changes) characteristics,in order to achieve better transport effect of aeolian sand.关键词
铁路/沙害治理/输沙工程措施/下导风板/风沙两相流/数值计算/风沙流场特征Key words
Railway/Sand disaster control/Sediment transport engineering measure/Lower air deflector/Sand flow field/Wind-sand two-phase flow/Numerical calculation/Characteristics of sand flow field分类
交通工程引用本文复制引用
程建军,智凌岩,薛春晓,蒋富强..铁路沿线下导风板对风沙流场的控制规律[J].中国铁道科学,2017,38(6):16-23,8.基金项目
国家自然科学基金资助项目(51641808,51568057,51268050,50908152) （51641808,51568057,51268050,50908152）
