Characteristic of wind-sand flow field of box-type movable sand barrier

CHENG Jian-jun; ZHI Ling-yan; XUE Chun-xiao

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CHENG Jian-jun, ZHI Ling-yan, XUE Chun-xiao. Characteristic of wind-sand flow field of box-type movable sand barrier[J]. Journal of Traffic and Transportation Engineering, 2017, 17(5): 61-70.

Citation:

CHENG Jian-jun, ZHI Ling-yan, XUE Chun-xiao. Characteristic of wind-sand flow field of box-type movable sand barrier[J]. Journal of Traffic and Transportation Engineering, 2017, 17(5): 61-70.

CHENG Jian-jun, ZHI Ling-yan, XUE Chun-xiao. Characteristic of wind-sand flow field of box-type movable sand barrier[J]. Journal of Traffic and Transportation Engineering, 2017, 17(5): 61-70.

Citation:

CHENG Jian-jun, ZHI Ling-yan, XUE Chun-xiao. Characteristic of wind-sand flow field of box-type movable sand barrier[J]. Journal of Traffic and Transportation Engineering, 2017, 17(5): 61-70.

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Characteristic of wind-sand flow field of box-type movable sand barrier

1.
College of Water and Architectural Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
2.
Northwest Research Institute Co., Ltd.of CREC, Lanzhou 730000, Gansu, China

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Author Bio:
CHENG Jian-jun(1979-), male, professor, PhD, chengdesign@163.com
Received Date: 2017-04-28
Publish Date: 2017-10-25

Abstract

Abstract

On the basis of field investigation, the sand-controlled characteristics of box-type movable sand barrier and the evolution process of wind-sand flow field around the barrier were analyzed by using computational fluid dynamics three-dimensional numerical modeling method and indoor wind tunnel test under the effect of changeable porosity and wind velocity.Analysis result indicates that under the control of sand barrier, there are deceleration zone, deceleration uptrend zone, acceleration zone, and vortex zone successively before and after sand barrier along the direction of wind.Deceleration zone and vortex zone form obviously in the cavities of sand barrier, the transient wind-sand flow sinks down in deceleration zone, vortex zone behind and the cavities of sand barrier, so the box-type movable sand barrier plays an important role in sandcontrol.As the increase of wind velocity, the height of deceleration uptrend zone increases, but the porosity change of windward side of sand barrier does not cause any effect to the height of deceleration uptrend zone.When the porosity of windward side of sand barrier is less than 5%, the flow weakens observably, and the sand deposites in the front of sand barrier, which can not make full use of the sand-control function of vortex zone behind sand barrier.When the porosity is more than 25%, the sand barrier can play full sand-controlled role, sand deposites in thewindward side, leeward side and cavities of sand barrier.When the porosity continues to increase to 30%, the sand-controlled effect does not improve obviously.Under the condition that the porosity is 30%, when the wind velocity continues to increase, the sand accumulation increases behind the sand barrier and decreases in the cavities of sand barrier, however, the tendency of decrease after the first increase occurs in the windward side of sand barrier.
- road engineering,
- wind-sand prevention and control,
- box-type movable sand barrier,
- three-dimensional numerical simulation,
- wind tunnel test,
- sand-controlled characteristic,
- wind-sand flow field,
- porosity

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References(25)

References

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