水土保持通报2024，Vol.44Issue(3)：84-92,9.DOI:10.13961/j.cnki.stbctb.20240628.002
猫头刺盾状移动式固沙障防沙效应风洞模拟试验研究
Wind Tunnel Simulation Experimental Study on Sand Fixation Effects of Shield-shaped Movable Sand Barriers Made with Oxytropis Aciphylla
摘要
Abstract
[Objective]The shield-shaped movable sand barrier is a new type of sand fixation barrier.The barrier is made according to bionic principles and composed of a shield-shaped iron mesh screen supporting the stems and leaves of the sand fixation shrub,Oxytropis aciphylla.The sand fixation effects of shield-shaped movable sand barriers were determined to choose the optimized type of sand fixation barrier to reveal the wind break and sand fixation mechanisms of shield sand barriers,in order to provide theoretical references for the selection and formulation of sand control measures in field projects.[Methods]A wind tunnel simulation experiment was conducted.The wind speed and flow field of the shield-shaped sand fixation barrier were measured at four wind speeds of 6,10,14,and 18 m/s.The wind erosion experiments were conducted on the sand fixation barriers at three wind speeds of 10,14,and 18 m/s.Comparative analysis was conducted on the windbreak and sand fixation effects of in-situ natural and different size bionic barriers.[Results]① When the airflow passed through the shield-shaped movable sand fixation barrier,its velocity weakened,forming a significant deceleration zone.At 6 m/s,the deceleration settlement zone reached 20 H(H means the height of barriers,H=11 cm).As wind speed increased,the deceleration settlement zone decreased.At 10 and 14 m/s wind speed,the deceleration settlement zone was 15 H.At 18 m/s wind speed,the barrier also maintained a deceleration settlement zone of 15 H.② Under the three wind speeds,the average sediment transport capacity of the new type of shield-shaped movable sand fixation barrier was 13.8％(10 m/s wind speed),21.1％(14 m/s wind speed),and 23.4％(18 m/s wind speed)of the sediment transport capacity without sand barriers.[Conclusion]The shield-shaped movable sand fixation barrier with a complete structure and a largest diameter had the best wind and sand prevention effect.The shield-shaped movable bionic sand fixation barrier had good wind and sand prevention effects,and can be moved,combined,and mechanically woven.It has a broad application potential in the field of desertification prevention,and wind and sand fixation.关键词
风洞模拟/猫头刺/盾状/移动式固沙障/流场/风速廓线Key words
wind tunnel simulation/Oxytropis aciphylla/shield-shaped/movable sand fixation barrier/flow field/wind profile分类
农业科技引用本文复制引用
陆文赋,屈建军,赵爱国,朱志昊,王磊,李敏岚,孟晨..猫头刺盾状移动式固沙障防沙效应风洞模拟试验研究[J].水土保持通报,2024,44(3):84-92,9.基金项目
宁夏回族自治区2022年重点研发计划项目"刷状网绳式系列草方格编织与微生物撒播智能化协同装备研发及试验示范"(2022BEG02003) （2022BEG02003）
中科院A类战略性先导科技专项"美丽中国生态文明建设科技工程专项沙漠边缘扩张带稳固技术与示范"(XDA23060201) （XDA23060201）
