水科学进展2017，Vol.28Issue(4)：571-578,8.DOI:10.14042/j.cnki.32.1309.2017.04.011
河道一维非恒定流微分结构摩阻公式及其试验论证
Analysis of 1-D unsteady flow friction in open channelflows and experimental demonstration
摘要
Abstract
The experimental formulas for the frictional resistance in open channel 1-D steady flow are based on one-to-one relationships among the hydraulic parameters.These formulas of frictional losses in steady flow cannot simulate the frictional losses in unsteady flow accurately because the hydraulic parameters reach their peaks at different times and their relationships among themselves are more complex.Therefore, using dimensional analysis, an improved differential structure formula has been developed.The experiment done in this study shows that the improved formula which takes the temporal and spatial variations of hydraulic parameters into account has higher accuracy than that of Chezy formula, and be of practical value.关键词
一维/非恒定流/摩阻损失/微分公式/模拟实验Key words
one dimensional/unsteady flow/friction resistance/differential structure/hydraulic experiment分类
建筑与水利引用本文复制引用
周俊伟,包为民,孙逸群,张乾..河道一维非恒定流微分结构摩阻公式及其试验论证[J].水科学进展,2017,28(4):571-578,8.基金项目
国家自然科学基金资助项目(51279057) （51279057）
国家重点研发计划资助项目(2016YFC0402703)The study is financially supported by the National Natural Science Foundation of China (No.51279057) and the National Key R&D Program of China (No.2016YFC0402703). （2016YFC0402703）
