不同间距双排尼龙阻沙网防风效应的风洞模拟

doi:10.7522/j.issn.1000-694X.2015.00146

摘要/Abstract

摘要： 为揭示风速和间距对双排尼龙阻沙网防风效应的影响，开展对2H、5H、10H、15H（H为尼龙网高度）间距尼龙阻沙网在6、9、12 m·s^-1风速下的风洞模拟试验，对不同风速、间距下加速率等值线、变化趋势和防风效能进行对比分析。结果表明：①风速和间距对双排尼龙阻沙网加速率极小值出现的相对位置基本无影响，但后排网后极小值小于前排网后，两排尼龙网对风场的影响存在累加效应。②双排尼龙阻沙网防风效应随来流风速增大而明显降低。③2H、5H间距双排尼龙阻沙网防风效应相对较好，5H最优，10H最差该结果与相同间距设置的野外实验相一致。实际应用中尼龙阻沙网的布设应综合考虑风况、布设间距等因素，笔者建议双排尼龙阻沙网布设间距采用5H。

关键词: 尼龙阻沙网, 防风效应, 风洞模拟

Abstract: To reveal the influence of wind speed and nylon net interval on the wind-break effect of double-row nylon net fence, wind tunnel simulation was conducted by 2H, 5H, 10H and 15H (H is the height of the fence) intervals atthe wind speed of 6 m·s^-1, 9 m·s^-1and 12 m·s^-1,respectively. Based oncomparative analysisof acceleration rate contour linesand variation tendencies, wind-break effects for different wind speedsand nylon net intervals are investigated in this paper. The results indicated that:①The relative position for minimum value of the acceleration rates ofdouble-row nylon net fenceis hardly influenced by wind speed and nylon net interval. However, the minimum value of net 2 was less than that of net 1. Furthermore,accumulation effects existed whenthe wind field is impacted by the double-row nylon net fence. ②The wind-break effects of the double-row nylon net fence decreased obviously with the increasing of wind speed. ③The intervalsof 2H and 5H showed better wind-break effects than others. Moreover, 5H was the most effectiveinterval, while 10H the worst one among the four intervals. Theseresults areconsistent with the findings of field experiments inthe corresponding interval. Wind speed and nylon net interval should be considered in the layout of nylon net fence in practices, and the double-row nylon net fencein interval 5H is recommended.

Key words: nylon net fence, windbreak effect, wind tunnel simulation

中图分类号:

X169

袁鑫鑫, 王海峰, 雷加强, 李生宇, 康向光, 马学喜. 不同间距双排尼龙阻沙网防风效应的风洞模拟[J]. 中国沙漠, 2016, 36(5): 1238-1246.

Yuan Xinxin, Wang Haifeng, Lei Jiaqiang, Li Shengyu, Kang Xiangguang, Ma Xuexi. Wind Tunnel Simulation of Windbreak Effect of Double-row Nylon Net Fence with Different Interval[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(5): 1238-1246.

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