摘要
基于SKM方法,引入二次流项系数,给出了漫滩水流水深平均流速沿横向分布的二维解析解.文中对SERC-FCF的系列试验进行了模拟,计算结果与实测资料吻合较好.在此基础上,进一步研究了复式河道断面形态对二次流项系数的影响,并分析了造成各种影响的原因.计算结果表明,二次流项系数的大小与断面形态有关,而其正负号与二次流的方向有关,这为二次流项系数的选取提供了参考依据.
The 2-D analytical solution for transverse velocity distribution in compound open channels was presented based on the Shiono and Knight method, in which the secondary flow coefficient was introduced to take account into the effect of the secondary flow. The modeling results agree well with the experimental results from science and engineering research councilflood channel facility （SERC-FCF）, based on which the effect of geography on the secondary flow coefficient is analyzed, as well as the essential reason for such effects. The modeling resuits show that the intensity of the secondary flow is related with the geometry of the compound channel section, and the sign of K-value is related with the rotating direction of the secondary flow cell, which proposes scientific reference for the selecting of K-value.
出处
《应用数学和力学》
CSCD
北大核心
2010年第6期681-689,共9页
Applied Mathematics and Mechanics
基金
国家自然科学基金资助项目(50749031)
教育部博士点基金资助项目(20070486022)
关键词
复式河道
漫滩水流
流速分布
二次流
compound channels
overbank flows
velocity distribution
secondary flow
