泥沙研究Issue(5)：73-80,8.
弯道环流流速公式的验证与比较
Validation and comparison of bend circulation velocity distribution formulas
摘要
Abstract
The velocity distribution formula of bend secondary flow is still an important content of theoretical research of meandering rivers. The general deduction process of the circulation velocity formula is presented. This paper summarizes five representative circulation velocity formulas, namely Rozovskii's formula, Zhang Honghu's formula, Odgaard's formula, Sun Dongpo's formula and modified Rozovskii formula. The Rozovskii's and Zhang Hongwu's experimental data are used to validate and compare the five formulas, including three approximate expressions of Rozovskii's formula. The validation results show that the precision of Ding Junsong's approximate expressions is higher, and the deviation of other two experssions is larger. In five representative circulation velocity formulas, the precision and reliability of Zhang's formula is the best, followed by Rozovskii's and Odgaard's formulas, and Sun's formula is poorly accorded with Zhang Hongwu's experimental data. The format of approximate expressions of modified Rozovskiis formula may be unreasonable, and especially in near bed zone it is apparently anamorphic and inconsistent with the qualitative rule of circulation veloctiy profile.关键词
弯道/弯道环流/流速分布公式/偏离度/验证Key words
bend/ bend secondary flow/ velocity distribution formula/ deviation/ validation分类
建筑与水利引用本文复制引用
李志威,方春明,邵佳..弯道环流流速公式的验证与比较[J].泥沙研究,2011,(5):73-80,8.基金项目
国家自然科学基金资助项目(编号:10772201) （编号:10772201）
