圆桩振荡绕流对淤泥床的冲蚀  

Scour of Mud Bed under a Circular Cylinder in Oscillating Flow

作　　者：浦群[1] 李坤[1] 

机构地区：[1]中国科学院力学研究所,北京100080

出　　处：《空气动力学学报》2000年第z1期27-31,共5页Acta Aerodynamica Sinica

基　　金：国家自然科学基金;中科院"九五"重大项目!"KZ951-405"

摘　　要：本文实验研究不同圆柱直径和不同初始圆柱与床面距离时圆柱振荡绕流对其下方淤泥介质床面的冲蚀作用。实验得到了在产生冲蚀的临界条件下圆柱与床面初始无量纲距离随振荡流Ｋｃ数的变化规律。由于不同的无量纲间距下圆柱振荡绕流分离流动的旋涡运动类型的不同，形成了冲蚀床表面的不同类型的表面冲蚀图象。The scour of the mud bed under a circular cylinder in oscillating flow is studied experementally at different cylinder diameters and different initial gaps between cylinder and bed. The relationship between critical initial gap above which no scour occurs and Kc mumber of the oscillating now is obtained in this test. Due to the different seperated oscillating flow patterns around the circular cylinder at different initial gaps, the different scour patterns are formed on the surface of the mud bed.

关 键 词：振荡流 冲蚀 圆柱绕流 淤泥床 冲蚀图象 

分 类 号：TV131.2[水利工程—水力学及河流动力学] TV149[天文地球—海洋科学] P756.2