【摘要】 将木质材料制成不同坡度、不同横断面形式的沟谷地形,通过大型风洞模拟试验,测定了地面效应影响下滑体凌空飞行时的空气动力学参数.风洞试验结果表明:沟谷地形对地面效应影响显著.地形圈闭效果越好,地面效应越明显,模型升力系数相对于平坦地形将成倍增加;模型离地高度越小,气垫效应越显著,但对平坦地形影响不明显;各沟谷地形下升阻比曲线变化基本相同,最大值均发生在飞行迎角8°左右.更多还原

【Abstract】 Many high-speed and long-runout landslides could fly in the air at the start-range stage,which has a significant effect of aero-dynamics.A wing model which is similar to sliding mass and a wing tunnel testing are made to determine the influence of aerodynamic effect and aerodynamic parameters.In the testing,valley terrain with different slopes and cross-sections can be made of wooden material.The results of wind tunnel testing show that aerodynamic properties of high-speed landslide are significant by the air cushion effect.Because of the different valley terrain,lift coefficient will dramatically increase when the around mountains get to closer.Therefore,vertical lift of high-speed sliding mass is increased,but it’s not obvious in flat terrain.The variations of lift-drag ratio in different valley terrains are basically the same,and the maximum values happen when angles of attack equal to 8°.更多还原