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硬质地HDPE沙障防风效益的风洞试验

张帅 丁国栋 高广磊 孙桂丽 赵媛媛 于明含 丛智杰 包岩峰

张帅, 丁国栋, 高广磊, 孙桂丽, 赵媛媛, 于明含, 丛智杰, 包岩峰. 硬质地HDPE沙障防风效益的风洞试验[J]. 北京林业大学学报, 2020, 42(3): 127-133. doi: 10.12171/j.1000-1522.20180282
引用本文: 张帅, 丁国栋, 高广磊, 孙桂丽, 赵媛媛, 于明含, 丛智杰, 包岩峰. 硬质地HDPE沙障防风效益的风洞试验[J]. 北京林业大学学报, 2020, 42(3): 127-133. doi: 10.12171/j.1000-1522.20180282
Zhang Shuai, Ding Guodong, Gao Guanglei, Sun Guili, Zhao Yuanyuan, Yu Minghan, Cong Zhijie, Bao Yanfeng. Wind tunnel test on windproof benefit of horniness HDPE sand barrier[J]. Journal of Beijing Forestry University, 2020, 42(3): 127-133. doi: 10.12171/j.1000-1522.20180282
Citation: Zhang Shuai, Ding Guodong, Gao Guanglei, Sun Guili, Zhao Yuanyuan, Yu Minghan, Cong Zhijie, Bao Yanfeng. Wind tunnel test on windproof benefit of horniness HDPE sand barrier[J]. Journal of Beijing Forestry University, 2020, 42(3): 127-133. doi: 10.12171/j.1000-1522.20180282

硬质地HDPE沙障防风效益的风洞试验

doi: 10.12171/j.1000-1522.20180282
基金项目: 中央高校基本科研业务费项目(2019GJZL11),国家自然科学基金项目(31270749和31600581)
详细信息
    作者简介:

    张帅,博士生。主要研究方向:荒漠化防治研究。Email:xxwoshizsxx@163.com  地址:100083 北京市海淀区清华东路35号北京林业大学水土保持学院

    责任作者:

    丁国栋,教授,博士生导师。主要研究方向:荒漠化防治。Email:dch1999@263.net  地址:同上

Wind tunnel test on windproof benefit of horniness HDPE sand barrier

  • 摘要: 目的研究硬质地HDPE网沙障防风效能。方法按照1:10的比例制作不同高度(1、2和3 cm)、不同边长(10、15和20 cm)、不同孔隙度(0.5和0.6)的硬质地HDPE网沙障模型,通过布设测点模拟出不同配置模式下沙障网格纵截面流场图及风速稳定后沙障网格内水平流场图,并运用地统计学的方法进行空间自相关分析。结果空间自相关分析中18种不同配置模式的沙障有16种符合高斯模型,2种符合球状模型,且所有模型R2均高于0.97,空间相关度小于25%,变程大于测点间距,表明不同沙障网格都具有强烈的空间自相关性,且测点间距合理。气流在通过沙障时可顺畅的从沙障孔隙中穿过,不会造成气流的抬升加速作用,因此障后近地表及沙障上方的风速均低于相同高度处的对照风速。硬质地HDPE沙障防风效能在本研究设置的变量梯度范围内与高度呈正相关关系,与边长和孔隙度呈负相关关系,高度和孔隙度对防风效能的影响较大。结论硬质地HDPE材料性质稳定,不会产生塑性变形,抗老化能力强,且防风效果较好,应用前景较好。

     

  • 图  1  不同类型高密度聚乙烯(HDPE)塑料网

    Figure  1.  Different types of high-density polyethylenehdpe (HDPE) plastic net

    图  2  边长为10 cm的沙障中线纵截面流场图

                     H. 沙障高度。下同。H, height of sand barrier. The same below.

    Figure  2.  Flow field diagram of the middle line longitudinal section with a side length of 10 cm

    图  3  边长为15 cm的沙障中线纵截面流场图

    Figure  3.  Flow field diagram of the middle line longitudinal section with a side length of 15 cm

    图  4  边长为20 cm的沙障中线纵截面流场图

    Figure  4.  Flow field diagram of the middle line longitudinal section with a side length of 20 cm

    图  5  不同边长沙障风速流场图

    Figure  5.  Wind flow field diagram of sand barrier with different side lengths

    图  6  不同沙障风速频数累积曲线

    10-1表示边长为10 cm,高度为1 cm的沙障;10-2表示边长为10 cm,高度为2 cm的沙障,以此类推。10-1 represents the sand barrier with 10 cm side length and 1 cm height, 10-2 represents the sand barrier with 10 cm side length and 2 cm height, and so on.

    Figure  6.  Frequency accumulation curves of wind speed for different sand barriers

    表  1  不同布设模式沙障空间自相关分析

    Table  1.   Spatial autocorrelation analysis of sand barrier in different layout modes

    孔隙度
    Porosity
    边长
    Side length/cm
    高度
    Height/cm
    模型
    Model
    块金值
    Nugget (C0)
    基台值
    Sill (C + C0)
    SCD/%变程
    Range (A)
    R2RSS
    0.5101高斯 Gaussian0.000 010.015 80.0614.90.9980.38 × 10− 7
    2高斯 Gaussian0.002 400.069 53.4527.20.9922.07 × 10− 7
    3高斯 Gaussian0.000 010.028 70.0317.00.9861.96 × 10− 7
    151球状 Spheroidal0.000 010.027 30.0413.50.9792.63 × 10− 7
    2高斯 Gaussian0.000 450.054 80.8216.90.9823.65 × 10− 7
    3高斯 Gaussian0.000 160.031 40.5120.20.9910.30 × 10− 7
    201高斯 Gaussian0.000 020.024 70.0821.50.9722.83 × 10− 7
    2高斯 Gaussian0.000 270.016 51.6415.60.9893.15 × 10− 7
    3高斯 Gaussian0.000 130.035 20.3719.20.9682.37 × 10− 7
    0.6101高斯 Gaussian0.000 190.026 40.7217.80.9841.47 × 10− 7
    2高斯 Gaussian0.000 320.017 91.7920.10.9782.35 × 10− 7
    3高斯 Gaussian0.000 180.032 50.5516.70.9820.26 × 10− 7
    151高斯 Gaussian0.000 240.031 80.7518.30.9931.78 × 10− 7
    2球状 Spheroidal0.000 530.026 52.0017.70.9853.24 × 10− 7
    3高斯 Gaussian0.000 370.014 72.5218.20.9751.64 × 10− 7
    201高斯 Gaussian0.000 420.013 23.1819.30.9820.67 × 10− 7
    2高斯 Gaussian0.000 210.035 70.5915.70.9942.12 × 10− 7
    3高斯 Gaussian0.000 010.015 30.0716.30.9742.45 × 10− 7
    注:SCD. 空间相关度。Note: SCD, spatial correlation degree.
    下载: 导出CSV

    表  2  不同沙障防风效能

    Table  2.   Windbreak efficiency of different sand barriers

    孔隙度
    Porosity
    边长
    Side length/cm
    高度
    Height/cm
    防风效能
    Windbreak efficiency
    0.51010.46
    20.62
    30.64
    1510.58
    20.61
    30.60
    2010.50
    20.57
    30.61
    0.61010.43
    20.45
    30.49
    1510.44
    20.44
    30.48
    2010.46
    20.46
    30.50
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-09-15
  • 修回日期:  2018-11-18
  • 网络出版日期:  2020-03-13
  • 刊出日期:  2020-03-31

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