落叶期柠条带防风效果的风洞实验研究  

Wind Tunnel Experimental Study on Windbreak Effect of Caragana Korshinskii Strip during Defoliation

作　　者：周云鹤 陈智[1] 佟鑫[1] 禚春祥 刘海洋[1] 豪宝尔 Zhou Yunhe;Chen Zhi;Tong Xin;Zhuo Chunxiang;Liu Haiyang;Hao Baoer(College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学机电工程学院,呼和浩特010018

出　　处：《农机化研究》2023年第7期129-135,共7页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(41661058,31860666);内蒙古自治区高等学校科学研究项目(NJZY19051,NJZY21461);内蒙古自然科学基金项目(2020BS04005);内蒙古农业大学引进优秀博士人才项目(NDYB2016-32)。

摘　　要：探究落叶期不同疏透度和间距下灌木林带的空气动力学特征,合理配置林带结构对修复荒漠草原土壤风蚀灾害具有重要意义。为此,利用风蚀风洞开展模拟实验,揭示疏透度和间距对双排行列式柠条带风速影响,开展对6 H、8 H、10 H间距行列式柠条带在疏透度60%、45%、35%下的风洞模拟实验,并对不同疏透度、间距下风流场进行对比分析。结果表明:①在不同对照疏透度条件下,不同带间距柠条带均对风速具有减弱作用,且在带间出现了减速区与加速区。间距对双排柠条带最小风速值出现的相对位置基本无影响,但第二带后风速最小值小于第一带后风速最小值,两排柠条带对风场的影响存在累加效应。②6 H与8 H宽带间距柠条带风速流场变化具有相似性,8 H间距双排柠条带防风最优,10 H相对较好。笔者建议双排行列式柠条带间距采用8 H或者10 H。③疏透度为45%的风速与疏透度为35%的无显著差异,因此,疏透度在35%或者45%,配置较为合理。It is of great significance to explore the aerodynamic characteristics of shrubbery belt under different porosity and spacing in deciduous period,and to reasonably configure the structure of forest belt to repair soil wind erosion disaster in desert steppe.The wind tunnel simulation experiment was carried out to reveal the influence of air permeability and spacing on the wind speed of double row caragana korshinskii strip.The wind tunnel simulation experiment was carried out for 6H,8H and 10H spacing caragana korshinskii strip with 60%,45%and 35%air permeability,and the wind flow field under different air permeability and spacing was compared and analyzed.The results show that①under the condition of different control porosity,different belt spacing can weaken the wind speed,and there are deceleration and acceleration zones between the belts.The distance has no effect on the relative position of the minimum wind speed of double row caragana korshinskii,but the minimum wind speed after the second belt is less than that after the first belt,and the effect of the two rows of Caragana korshinskii on the wind field is cumulative.②The results show that the wind speed and flow field of 6H and 8H wide-band spacing Caragana korshinskii strip are similar,8H spacing double row Caragana korshinskii strip is the best,10H is relatively better.The author suggests that the spacing of caragana korshinskii strips in double row determinant should be 8H or 10H.③There is no significant difference between the wind speed with 45%air permeability and that with 35%air permeability.

关 键 词：疏透度 间距 风流场 方差分析 柠条带 

分 类 号：S121[农业科学—农业基础科学] S727.23