Numerical Simulation of Wind-Sand Flow Characteristics of Inclined Inserting-Type Sand Fence Under Influence of Inserting Plate Angle

Ding Bosong; Gao Li; CHENG Jianjun; Chen Boyu

doi:10.13961/j.cnki.stbctb.2021.01.019

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Numerical Simulation of Wind-Sand Flow Characteristics of Inclined Inserting-Type Sand Fence Under Influence of Inserting Plate Angle

- Numerical Simulation of Wind-Sand Flow Characteristics of Inclined Inserting-Type Sand Fence Under Influence of Inserting Plate Angle
- Bulletin of Soiland Water Conservation Vol. 41, Issue 1, Pages: 132-137(2021)
- 作者机构：
  
  石河子大学水利建筑工程学院,新疆,石河子,832003
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.01.019
  CLC： U216.41
- Published：2021
- 稿件说明：
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Ding Bosong, Gao Li, CHENG Jianjun, et al. Numerical Simulation of Wind-Sand Flow Characteristics of Inclined Inserting-Type Sand Fence Under Influence of Inserting Plate Angle[J]. Bulletin of Soiland Water Conservation, 2021, 41(1): 132-137.
DOI：

Ding Bosong, Gao Li, CHENG Jianjun, et al. Numerical Simulation of Wind-Sand Flow Characteristics of Inclined Inserting-Type Sand Fence Under Influence of Inserting Plate Angle[J]. Bulletin of Soiland Water Conservation, 2021, 41(1): 132-137. DOI： 10.13961/j.cnki.stbctb.2021.01.019.

摘要

[目的] 优化既有沙障的结构形式，以发挥最大挡沙功效，揭示铁路沿线斜插板式沙障的风沙流特征和规律，为风沙灾害防治提供相关的设计参考和科学依据。[方法] 基于欧拉双流体非定常模型对具有不同插板倾角（15°，30°，45°和60°）但孔隙率均为30%的斜插板式沙障进行数值模拟。[结果] ①随插板倾角逐渐增大，沙障迎风侧减速区范围无明显变化，上方加速区和背风侧涡流区范围逐渐增大，迎风侧气流向下弯曲运动的趋势逐渐增强，背风侧向上运动的气流与水平风向夹角逐渐增大。②不同风速下，4种斜插板式沙障周围风速均呈“U”型分布，对同一风速而言，背风侧涡流区内风速极小值与插板倾角呈负相关。[结论] 随插板倾角逐渐增大，沙障迎风侧积沙量逐渐增多，背风侧整体积沙量逐渐减少但背风侧1 H范围内积沙量逐渐增多，背风侧主要积沙分布范围与沙障之间的距离逐渐增大。

Abstract

[Objective] The structure form of existing sand barriers was optimized to maximize the sand retention effect

the characteristics of wind and sand flow of inclined inserting-type sand fences along a railway were studied in order to provide a relevant design reference and scientific basis for the prevention and control of wind and sand disasters.[Methods] Based on the Eulerian two-fluid unsteady model

numerical simulations were conducted on inclined inserting-type sand fences with different inclination angles of the insert plate (15°

30°

45°

and 60°) but the same porosity (30%).[Results] ① The inclination angle of the insert plate gradually increased

the range of the windward side deceleration zone did not change significantly

and the range of the upper acceleration zone and the leeward side vortex zone gradually increased. The tendency of the windward side airflow to bend downward gradually increased

and the angle between the airflow moving upward on the leeward side and the horizontal wind direction gradually increased. ② Under different wind speeds

the wind speeds around the inclined inserting-type sand fence were U-shaped curves. For the same wind speed

the minimum wind speed in the leeward vortex area was negatively correlated with the inclination angle of the plate.[Conclusion] As the inclination angle of the inserting plate increased gradually

the sand on the windward side gradually increased

and the sand on the leeward side gradually decreased. However

the sand in the 1 H range on the leeward side gradually increased. The distance between the main sand distribution on the leeward side and the sand barrier gradually increased.

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