Wind Tunnel Experiment on Impacts of Different Sand Barrier Layouts on Windbreak and Sand-fixing

Sun Jing; Wang Jun; Hong Junzhe; Jia Xiaojing; Zhang Shaoyun

doi:10.13961/j.cnki.stbctb.2023.04.006

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Wind Tunnel Experiment on Impacts of Different Sand Barrier Layouts on Windbreak and Sand-fixing

- Wind Tunnel Experiment on Impacts of Different Sand Barrier Layouts on Windbreak and Sand-fixing
- Bulletin of Soiland Water Conservation Vol. 43, Issue 4, Pages: 44-52(2023)
- 作者机构：
  
  1. 河北建筑工程学院土木工程学院,河北,张家口,075000
  2. 河北省土木工程诊断、改造与抗灾重点实验室,河北,张家口,075000
  3. 河北省高校道桥结构健康监测与维修加固应用技术研发中心,河北,张家口,075000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.04.006
  CLC： X915.5;S157.1
- Published：2023
- 稿件说明：
移动端阅览
Sun Jing, Wang Jun, Hong Junzhe, et al. Wind Tunnel Experiment on Impacts of Different Sand Barrier Layouts on Windbreak and Sand-fixing[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 44-52.
DOI：

Sun Jing, Wang Jun, Hong Junzhe, et al. Wind Tunnel Experiment on Impacts of Different Sand Barrier Layouts on Windbreak and Sand-fixing[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 44-52. DOI： 10.13961/j.cnki.stbctb.2023.04.006.

摘要

[目的] 研究带孔沙砖的铺设形式对风场特性和防风沙效果的影响，旨在为选择新型防风固沙材料提供理论依据。[方法] 通过风洞试验，探究净风条件下方格沙障、梯度行列式沙障的风压分布及平均风压系数波动情况；重点对比分析了风沙条件下这2种不同沙障形式的障后风速、防风效能和积沙效果。[结果] 相比于梯度行列式沙障，方格沙障内部平均风压系数均为负值，内部风流循环产生涡旋使其受压更稳定，且障后平均风速衰减率更高；防风效能沙障高度出现了先升高后下降的趋势，在10 cm高度方格沙障的防风效能为64.3%，比梯度行列式沙障高4.2%；方格沙障第1排、第2排后方格内总沙粒沉积率分别是梯度行列式沙障的1.14，1.66倍，且方格沙障的障后沉积沙粒量、障后沉积范围均要小于梯度行列式沙障。[结论] 方格沙障具有使风流明显衰减的功能，阻沙率大于梯度行列式沙障，沙粒主要沉降在方格内部，其防风沙效果最好，为最优铺设形式。

Abstract

[Objective] The influences of porous sand-fixing bricks layout on wind field characteristics

windbreak effect and sand-fixing were studied in order to provide a theoretical basis for the selection of new windbreak and sand-fixing materials. [Methods] The wind pressure distribution and the fluctuation of average wind pressure coefficient of a grid sand barrier and a gradient determinant sand barrier under wind conditions were explored by wind tunnel experiment. It was compared and analyzed emphatically for wind speed

windbreak efficiency

and sand accumulation for the two different types of sand barrier under sand storm. [Results] The average wind pressure coefficient inside the grid sand barrier was negative compared with the gradient determinant sand barrier

and the vortex generated by the internal wind circulation made it more stable under pressure. The average wind speed attenuation rate behind the grid sand barrier was higher than that behind the gradient determinant sand barrier. The windbreak efficiency first increased and then decreased with the increases of height along the height divection of sand barrier in barrier height. At 10 cm height

the windbreak efficiency of the grid sand barrier was 64.3%

which was 4.2% higher than that of gradient determinant sand barrier. The total sand deposition rates in the first row and the second row of the grid sand barrier were 1.14 and 1.66

respectively

times higher than that of the gradient determinant sand barrier. The amount of sand deposited behind the grid sand barrier and the deposition range behind the grid sand barrier were smaller than those values observed for the gradient determinant sand barrier. [Conclusion] The grid sand barrier had a significant attenuation effect on wind flow

and the sand resistance rate was higher than that of the gradient determinant sand barrier. Sand particles mainly settled inside the grid sand barrier

and its windbreak effect was better than observed for the gradient determinant sand barrier. The grid sand barrier was

therefore

judged to be the optimal sand barrier layout.

关键词

Keywords

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