弯曲复式河槽水流泥沙因子的横向分布模型及其应用  

Model of Lateral Distributions of Flow and Sediment Factors in Curved Compound Channel and Its Application

作　　者：张明武[1] 彭红[1] ZHANG Mingwu;PENG Hong(Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China)

机构地区：[1]黄河水利委员会黄河水利科学研究院,河南郑州450003

出　　处：《华北水利水电大学学报（自然科学版）》2018年第5期1-6,共6页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：中央级公益性科研院所基本科研业务费专项项目(HKY-JBYW-2017-03);国家重点研发计划项目(2016YFC0402408;2017YFC0404402)

摘　　要：在弯道环流的作用下,滩槽水沙交换的强度和模式明显有别于顺直河道情况,其研究内容相对复杂。目前,对弯曲河道水沙输移规律尚缺乏较系统的研究。将SHIONO&KNIGHT方法拓展应用到弯曲复式河槽中研究弯曲河道的水沙因子的横向分布规律,从考虑侧向二次流惯性力和河道弯曲程度的动量方程出发,对水流微小控制体进行了受力分析,建立了复式断面流速横向分布模型,得到了复式断面流速和挟沙力的横向分布规律,最后论证了不同弯道曲率对复式河道水流泥沙因子横向分布的影响。Under the circulating current in curved compound channels, the intensity- and mode of water and sand exchange between channel and floodplain is obviously different from that of straight compound channel. In view of the relatively complex research content, there is still a lack of systematic research on the transport regulation of water and sand in curved compound channel. For studying the lateral distributions of flow and sediment factors in curved compound channel, the SHIONO and KNIGHT method was used to extend. From the momentum equation considering the inertia force of lateral secondary flow and channel bending, the stress of the small flow control was analyzed, the model of velocity- lateral distribution in curved compound channel was established, lateral distributions of flow velocity and the sediment-carrying capacityin curved compound channel were proposed, finally, the influence of different bend curva- tures on lateral distributions of the flow and sediment factors was analyzed.

关 键 词：弯曲复式河槽 横向分布模型 水流泥沙因子 SHIONO&KNIGHT方法 漫滩水流 

分 类 号：TV143[水利工程—水力学及河流动力学]