Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River  

作　　者：Xiao-ting Yang Qian-qian Shang Hui Xu Guo-bin Li Ya-jun Gao Qi-lin Yang 

机构地区：[1]Tibet Agricultural and Animal Husbandry University,Linzhi 860001,China [2]State Key Laboratory of Hydrology–Water Resources and Hydraulic Engineering,Nanjing 210029,China [3]River and Harbor Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China

出　　处：《Water Science and Engineering》2023年第3期289-294,共6页水科学与水工程（英文版）

基　　金：supported by the Project of Subsequent Work of the Three Gorges Project(Grant No.SXHXGZ-2020-3).

摘　　要：Froude similitude and friction similitude are the two crucial similarity conditions that are often used in physical-scale modeling of rivers.However,models often deviate from Froude similitude when dealing with real-world situations.This study developed several fixed-bed river models with various curvatures to determine the effect of Froude similitude deviation on curved channel modeling.Models were constructed according to the characteristics of the Middle Yangtze River.Differences in longitudinal slope,transverse slope,and main stream line location were measured by varying Froude similitude deviation.The deviations of longitudinal slope and velocity were negligible because friction similitude was accounted for.The transverse slope varied significantly with the Froude similitude deviation,and the main stream line varied with the curvature and Froude similitude deviation.Formulae were derived to estimate the slope deviation.These analyses helped to clarify the feasibility of the method of Froude similitude deviation for curved channels.

关 键 词：Fixed-bed river model Froude similitude deviation Flow movement Water surface slope Middle Yangtze river 

分 类 号：TB5[理学—物理]