| 栅栏绕流减速效应风洞实验模拟 |
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| 引用本文： | 罗万银,董治宝,钱广强,袁文丽.栅栏绕流减速效应风洞实验模拟[J].中国沙漠,2010,30(1):1-7. |
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| 作者姓名： | 罗万银 董治宝 钱广强 袁文丽 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所 沙漠与沙漠化重点实验室, 甘肃 兰州 730000 |
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| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金杰出青年科学基金 |
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| 摘 要： | 为研究阻沙栅栏的空气动力学效应,利用PIV技术对栅栏绕流的速度场进行了风洞实验模拟,并对其减速效应加以分析评价。结果表明,疏透度对栅栏绕流的平均速度场分布影响比较明显,疏透度越小栅栏后的平均水平风速衰减得越快;栅栏绕流的垂直速度分量在栅栏顶部最大,并随疏透度的增大而减小,影响了栅栏周围沙粒的跃移传输及沉积特征;栅栏后的累计减速率可以用高斯峰值函数来拟合,随疏透度的增大呈先增大后减小的趋势,疏透度η=0.2时累计减速率最大,代表了栅栏减速的理论最佳疏透度。
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| 关 键 词： | PIV 阻沙栅栏 风速衰减 风洞模拟 |
| 收稿时间： | 2008-12-14; |
| 修稿时间： | 2009-07-11 |
Wind Tunnel Simulation on the Wind Velocity Decrement around Porous Fences |
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| LUO Wan-yin,DONG Zhi-bao,QIAN Guang-qiang,YUAN Wen-li.Wind Tunnel Simulation on the Wind Velocity Decrement around Porous Fences[J].Journal of Desert Research,2010,30(1):1-7. |
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| Authors: | LUO Wan-yin DONG Zhi-bao QIAN Guang-qiang YUAN Wen-li |
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| Institution: | Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | In order to study the aerodynamics of sand fences,the mean velocity field around porous fences was simulated in wind tunnel based on the PIV technology,and its velocity decrement effect was analyzed and evaluated.The results show that porosity has distinct effect on the mean velocity field,the lower the porosity the faster the mean wind velocity decreased.The vertical velocity component decreases with increasing porosity and shows the maximum value on the top of the fence,and it have potential influence on ... |
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| Keywords: | PIV PIV sand fences wind velocity decrement wind tunnel simulation |
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