Comparing performances of a triangular embankment and a rigid wall-type barrier in sandstorms using simulation and a wind tunnel test

Sarafrazi, Vahid; Talaee, Mohammad Reza

doi:10.1140/epje/i2020-11996-1

Cited by 9 publications

(2 citation statements)

References 34 publications

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“…The results of Xu et al (2018) and other studies show that under constant wind speed, when the angle between the main shaft of the lateral transport project of the feather sand-flushing bath and the wind speed is less than 30 °, the formed flow field is the most suitable for the lateral transport of wind-sand flow. Compared with the checkerboard sand barrier, the sediment deposition distance of the triangular sand barrier increases by 25% (Sarafrazi and Reza Talaee, 2020). The research results of Zhang et al (2018) on the characteristics of wind-blown sand flow under the different inclined angles of the sand barrier show that increasing the inclined angle of the sand barrier can enhance the blocking effect of the sand barrier on airflow.…”

Section: Wind Prevention Benefit Analysismentioning

confidence: 93%

Numerical study on wind profiles change trend of upright reticulation barriers under different configuration models

Dang

Tang³

et al. 2023

Front. Environ. Sci.

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To explore how to lay the same specifications to maximize the protection benefits of mechanical sand barriers is an essential issue in the actual production process. We used the Reynolds-Averaged Navier-Stokes (RANS) method and the shear stress transport (SST) K-ε turbulence model to study the windbreak efficiency of sand barriers with different structures. Among them, the structure of the sand barriers includes rhombus 60° (cTnI = 60°, R60°), rhombus 90° (cTnI = 90°, R90°), rhombus 120° (cTnI = 120°, R120°) and parallel straight line (belt). The sand barrier was set to a porous jump model, where the surface permeability a was 2.6 × 108, and the inertial resistance coefficient c2 was 9,400. The wind velocity field results showed that the sand barrier’s blocking effect on wind velocity decreases with the increase in height. The leading edge of the 120° obstacle has the strongest weakening effect on the inlet wind speed. The minimum wind speed (0.97 m/s to 1.41 m/s) occurs near the sand barrier, and the vortex appears on both sides of the node, and the wind speed increases. The order of the blocking effect of different angles on airflow is as follows: 120° > 90°> brand >60°. Under R120° conditions, the wind speed is reduced by more than 60% at 0.05 m and 0.1 m height behind the barrier compared to the initial wind speed. This will be conducive to the design and control engineering planning of the laying angle of the gauze sand barrier in the main wind direction.

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Section: Wind Prevention Benefit Analysismentioning

confidence: 93%

Numerical study on wind profiles change trend of upright reticulation barriers under different configuration models

Dang

Tang³

et al. 2023

Front. Environ. Sci.

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“…Relevant research has shown that the greater the angle between the railway and the main wind direction is, the more serious blown sand hazards will be [27,28]. With reference to relevant research [29][30][31], the angle between the subgrade model and the wind direction was set to 90 • . be ensured by rectifier rectification.…”

Section: Wind Tunnel Simulation Experimentsmentioning

confidence: 99%

Wind Dynamic Characteristics and Wind Tunnel Simulation of Subgrade Sand Hazard in the Shannan Wide Valley of the Sichuan–Tibet Railway

Xie

Zhang

Pang

2022

IJERPH

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The Shannan wide valley section of the Sichuan–Tibet Railway is located in the middle reaches of the Yarlung Zangbo River, where sand hazard is severe. A wind tunnel simulation experiment was conducted by establishing a subgrade model and performing field observation to carry out research on the dynamic environment of blown sand and the sand hazard formation mechanism of subgrade in the Shannan wide valley. Observation results showed that the sand-moving wind of the Shannan wide valley was chiefly derived from the ENE direction, and the resultant sand transport direction was WSW. Wind speed, the frequency of sand-moving wind, the sand drift potential, and the maximum possible sand transport quantity were relatively high in the spring. Meanwhile, the dynamic of the wind-blown sand flow was further enhanced in the spring, particularly influenced by the flow action of the Yarlung Zangbo River. Thus, sand hazard mainly occurred in the spring. The Sichuan–Tibet Railway subgrade evidently changed the wind speed, the wind-blown sand flow field, and conditions of transport and accumulation. Within the distance of 5 times the model height in the windward direction and at the subgrade top center to 20 times the model height of the leeward direction was the wind speed deceleration zone, resulting in sand particle sediments. A wind speed acceleration zone appeared on the subgrade windward slope shoulder, resulting in wind-blown sand flow erosion. This study provides a scientific basis for sand hazard prevention and control in the Sichuan–Tibet Railway.

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Protective benefit of folded linear HDPE board sand fences along the Golmud-Korla Railway, China: Field observation and wind tunnel study

Zhang,

Tian,

Wang

et al. 2024

J. Mt. Sci.

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Comparing performances of a triangular embankment and a rigid wall-type barrier in sandstorms using simulation and a wind tunnel test

Cited by 9 publications

References 34 publications

Numerical study on wind profiles change trend of upright reticulation barriers under different configuration models

Numerical study on wind profiles change trend of upright reticulation barriers under different configuration models

Wind Dynamic Characteristics and Wind Tunnel Simulation of Subgrade Sand Hazard in the Shannan Wide Valley of the Sichuan–Tibet Railway

Protective benefit of folded linear HDPE board sand fences along the Golmud-Korla Railway, China: Field observation and wind tunnel study

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