全文下载：2013050516
段振亚1，杨文祥1，董营营1，胡金榜2
（1.青岛科技大学 机电工程学院，山东 青岛 266061；2.天津大学 化工学院，天津 300072）
摘要： 分别对开孔率为0.273的非平面型防风网与0.264的平面型防风网进行了风洞试验研究，并且采用热线风速仪获得了不同底部间隙率（G/H=0.000, 0.025, 0.075, 0.125, 0.150, 0.175和0.200）的非平面型和平面型防风网尾流区风速分布的数据。通过试验数据计算出不同底部间隙非平面型与平面型防风网尾流区的减风率，并对其进行了分析比较。综合分析可得：非平面型与平面型防风网模型均在底部间隙率（G/H）为0.150时，尾流区具有较好的风速分布和减风率，防风网的抑尘效果最优。
关键词： 非平面型防风网； 风洞试验； 底部间隙率； 减风率
中图分类号： X 513文献标志码： A
Effect of a Bottom Gap on Flow Characteristics Behind Porous Fence
DUAN Zhen-ya1, YANG Wen-xiang1, DONG Ying-ying1, HU Jin-bang2
（1. College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061， China；
2. College of Chemical Engineering, Tianjin University, Tianjin 300072， China）
Abstract: The flow characteristics behind a non-planar porous fence of geometric porosity ε=0.273 and a planar porous fence of geometric porosity ε=0.264 with various bottom gaps (G) have been investigated by hot-wire anemometer in a wind tunnel experiment. Seven gap ratios G/H=0.000, 0.025, 0.075, 0.125, 0.150, 0.175 and 0.200 of the non-planar and planar porous fences were tested with the free-stream velocity fixed at10 m·s-1. The experimental data were analyzed and the wind reduction ratios for different gaps of the porous fence were calculated to estimate the shelter effect of the non-planar and planar porous fences. The results show that the gap ratio G/H=0.150 gives the best shelter effect among the seven gaps of both the non-planar and planar porous fence tested in the experiment, having a better mean velocity and wind reduction ratio in a large area behind the porous fence.
Key words:non-planar porous fence; wind tunnel experiment; gap ratio; wind reduction ratio
收稿日期：2012-10-29
基金项目： 山东省优秀中青年科学家奖励基金项目（2008BS09020）.
作者简介： 段振亚（1974—），男，博士，副教授.
