低覆盖度羽翼袋沙障防风积沙效应的风洞试验

羽翼袋沙障是按照底袋固定流沙和袋上的羽翼片在风中波动削弱风速而设计出来的组合沙障，已获得专利授权。本试验针对羽翼袋沙障，在4种风速条件下，模拟了风速流场和阻沙固沙效果。结果表明：（1）与袋状沙障（对照）相比，羽翼袋沙障防风效果平均增加了48%，且风速越大降低风速效果越明显，说明羽翼片的波动能够显著消弱风速。（2）与对照相比，羽翼袋沙障的输沙量分别降低81.44%（翼高10 cm）、88.92%（翼高20 cm）。（3）同样是直径10 cm的袋，翼高20 cm的羽翼袋沙障风蚀量比翼高10 cm的降低风速13.6%，减少风蚀量19%。羽翼袋沙障具备固沙与削弱风速的作用，显著提高沙障的防风固沙效果，为防沙治沙开拓了新途径。

Wind Tunnel Experimental Study on the Effect of Wind-proof and Sand Accumulation in Low Coverage Wingbag Sand Barrier

Wing bag sand barrier is a combined sand barrier designed according to the bottom bag fixed quicksand and the wings on the bag in the wind to reduce the wind speed. In this experiment, for the windbag sand barrier, the wind speed flow field and sand-fixing effect were simulated under four wind speed conditions. The results show that:(1) Compared with the bag-shaped sand barrier (control):the wind-proof effect of the wing-bag sand barrier increases by an average of 48%, and the greater the wind speed, the more obvious the effect of reducing the wind speed, indicating that the fluctuation of the wing can significantly weaken the wind speed. (2) Compared with the control, the sediment transport of the wing pocket sand barrier was reduced by 81.44% (wing height 10 cm) and 88.92% (wing height 20 cm). (3) The same bag with a diameter of 10 cm, the wind erosion of the wing bag with a wing height of 20 cm is increased by 13.6% compared with the wind speed of 10 cm, and the wind erosion is increased by 19%. The wing bag sand barrier has the function of sand fixation and weakening wind speed, which significantly improves the wind and sand fixation effect of the sand barrier and opens up a new way for sand prevention and control.