摘要
本文分析了水力半径分割法的合理性及存在问题，提出了符合实质的分割原则，导出边界切应力分布公式和三维流速分布及阻力公式分析表明：影响边界阻力等因素有断面形状参数、糙率分布及水流运动强度．研究中包含了这些影响因索，所得公式适应性较强，并经试验资料验证．
On the assumption that the local energy of flow will be transported toward boundary along minimum relative hydraulic distance(l/A)a new principle has beendeveloped.The principle is applied to determine the boundary shear stressdistribution, velocity profile and friction factor for rectangular and trapezoidal channels.The results show that the friction is closely related to the shape function of thecross section,the roughness distribution on the wetted perimeter and the flow intensity.The formulas are in good agreement with the experimental data.
出处
《水利学报》
EI
CSCD
北大核心
1996年第6期62-69,共8页
Journal of Hydraulic Engineering
关键词
明渠
水流阻力
分割线
边界切应力
boundary shear stress, partition line, friction factor, open channel flow.
