多波长明渠非恒定流传播特性研究  

Study on Unsteady Flow Propagation Characteristics in Multi-wavelength Open Channels

作　　者：古宇翔 杨胜发[1,2] 黄岱 胡江 GU Yuxiang;YANG Shengfa;HUANG Dai;HU Jiang(Hohai College of Chongqing Jiaotong University,Chongqing 400074,China;National Inland Waterway Regulation Engineering Technology Research Center,Chongqing 400074,China;School of Engineering,Hokkaido University,Hokkaido 060-8628,Japan)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]国家内河航道整治工程技术研究中心,重庆400074 [3]北海道大学大学院工学研究院,日本北海道060-8628

出　　处：《广东水利水电》2020年第6期11-16,共6页Guangdong Water Resources and Hydropower

基　　金：国家自然科学基金(编号:5167090829);国家重点研发计划课题基金(编号:2016YFC0402104)。

摘　　要：为进一步研究多波长明渠非恒定流的传播特性,提出一种新型的隐式迭代法,对多波长明渠非恒定流进行数值模拟,并通过水槽试验对其计算结果进行验证,证明新型的隐式迭代法可以进行多波长明渠非恒定流计算,计算结果精度较高。通过多波长非恒定流的水槽模拟,总结出在高比降及大平均流量的情况下,非恒定流沿程传播速度较快,衰减较慢;在低比降与小平均流量的情况下,非恒定流沿程传播速度较慢,衰减较快。对于进口流量变幅相同的工况,流量和水深变幅的衰减百分比在相同波长内几乎完全一样。In order to further study the spread characteristic of the multiwavelength unsteady flow in open channel flow,this paper proposes a new kind of implicit iteration method,the numerical simulation of unsteady flow in open channel flow of wavelength,and through the tank test to validate the calculated results,proved that the new implicit iteration method can be more wavelength open-channel unsteady flow calculation,calculation precision is higher.Through the flume simulation of multi-wavelength unsteady flow,it is concluded that in the case of high specific drop and large average flow,the unsteady flow propagates faster and attenuates slower along the path.In the case of low specific drop and small average flow,the unsteady flow propagates slowly and decays rapidly along the path.For conditions with the same inlet flow amplitude,the attenuation percentage of flow and water depth amplitude is almost exactly the same in the same wavelength.

关 键 词：非恒定流 数值模拟 多波长 传播特性 

分 类 号：TV133.2[水利工程—水力学及河流动力学]