高速滑坡飞行气动特性的风洞试验研究

Study on Wind Tunnel Testing of Aerodynamic Properties of Highspeed Landslide Flying

国内外已发生的许多大型高速滑坡在近程活动阶段均呈现飞行运动 ,高速滑体如同机翼一样 ,将产生机翼效应 .这种空气动力学效应不仅使滑坡飞行得更远 ,而且使位能更多地转变成滑坡飞行的功能 ,使滑体获得更大的速度 .将高速滑体制成相似的机翼模型 ,进行风洞试验 ,即可测定滑坡凌空飞行的空气动力学参数 ,从而计算大型高速滑坡凌空飞行的空气动力升力、飞行速度和飞行距离等 .风洞试验结果表明 :高速滑体的几何外形与结构、飞行姿态对高速滑坡飞行气动特性有显著影响 。

Many large highspeed landslides flew in the short-range stage all over the world.Highspeed sliding mass would bring about aerodynamics effect like the aerofoil.The effect results in the fact that potential energy could be more converted into kinetic energy as well as the sliding mass could fly farther,and thus the sliding mass would acquire a higher velocity.If we make a wing model which is similar to sliding mass,we can determine aerodynamic parameters by the wind tunnel testing and thus calculate the lift force,flying velocity and flying distance.The results of wind tunnel testing showes that the shape,structure and flying posture have remarkable influences on aerodynamic properties of highspeed landslide,but the flying velocity has seldom influence on them.