Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s40333-017-0068-5 |
Wind tunnel test on the effect of metal net fences on sand flux in a Gobi Desert, China | |
Wang Tao1,2,3,4; Qu Jianjun1,2,3; Ling Yuquan1; Xie Shengbo1,3; Xiao Jianhua1,3 | |
通讯作者 | Qu Jianjun |
来源期刊 | JOURNAL OF ARID LAND |
ISSN | 1674-6767 |
EISSN | 2194-7783 |
出版年 | 2017 |
卷号 | 9期号:6页码:888-899 |
英文摘要 | The Lanzhou-Xinjiang High-speed Railway runs through an expansive windy area in a Gobi Desert, and sand-blocking fences were built to protect the railway from destruction by wind-blown sand. However, the shielding effect of the sand-blocking fence is below the expectation. In this study, effects of metal net fences with porosities of 0.5 and 0.7 were tested in a wind tunnel to determine the effectiveness of the employed two kinds of fences in reducing wind velocity and restraining wind-blown sand. Specifically, the horizontal wind velocities and sediment flux densities above the gravel surface were measured under different free-stream wind velocities for the following conditions: no fence at all, single fence with a porosity of 0.5, single fence with a porosity of 0.7, double fences with a porosity of 0.5, and double fences with a porosity of 0.7. Experimental results showed that the horizontal wind velocity was more significantly decreased by the fence with a porosity of 0.5, especially for the double fences. The horizontal wind velocity decreased approximately 65% at a distance of 3.25 m ( i.e., 13H, where H denotes the fence height) downwind the double fences, and no reverse flow or vortex was observed on the leeward side. The sediment flux density decreased exponentially with height above the gravel surface downwind in all tested fences. The reduction percentage of total sediment flux density was higher for the fence with a porosity of 0.5 than for the fence with a porosity of 0.7, especially for the double fences. Furthermore, the decreasing percentage of total sediment flux density decreased with increasing free-stream wind velocity. The results suggest that compared with metal net fence with a porosity of 0.7, the metal net fence with a porosity of 0.5 is more effective for controlling wind-blown sand in the expansive windy area where the Lanzhou-Xinjiang High-speed Railway runs through. |
英文关键词 | wind-blown sand wind tunnel experiment porous fence flow field sediment flux density Lanzhou-Xinjiang High-speed Railway Gobi Desert |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000415159600008 |
WOS关键词 | POROUS FENCES ; VELOCITY ; FLOW ; AERODYNAMICS ; ENVIRONMENT ; SIMULATION ; TRANSPORT ; RAILWAY ; EROSION ; FIELDS |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200191 |
作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China; 2.Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol, Yinchuan 750021, Peoples R China; 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Dunhuang Gobi & Desert Ecol & Environm Res Stn, Dunhuang 736200, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Wang Tao,Qu Jianjun,Ling Yuquan,et al. Wind tunnel test on the effect of metal net fences on sand flux in a Gobi Desert, China[J],2017,9(6):888-899. |
APA | Wang Tao,Qu Jianjun,Ling Yuquan,Xie Shengbo,&Xiao Jianhua.(2017).Wind tunnel test on the effect of metal net fences on sand flux in a Gobi Desert, China.JOURNAL OF ARID LAND,9(6),888-899. |
MLA | Wang Tao,et al."Wind tunnel test on the effect of metal net fences on sand flux in a Gobi Desert, China".JOURNAL OF ARID LAND 9.6(2017):888-899. |
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