冰期明渠非恒定流阻力分析及圣维南方程优化  

Resistance analysis of unsteady flow in open channel in ice period and modification of Saint-Venant equation

作　　者：闫弈博 冷星火 黄会勇 王长德[2] 

机构地区：[1]长江勘测规划设计研究院枢纽处,湖北武汉430010 [2]武汉大学水利水电学院,湖北武汉430072

出　　处：《人民长江》2014年第6期53-55,59,共4页Yangtze River

摘　　要：南水北调中线输水线路自南向北由温暖带进入半寒冷地区,受气温变化影响,将有不同程度的冰情出现,对渠道运行安全和输水效率造成不利影响。以描述一维明渠非恒定流的圣维南方程为基础,对输水线路的冰封段和冰盖段水流阻力进行了分析,进而得到针对冰期水力条件的修正圣维南方程,为冰期渠道水力学数值模拟提供了理论基础。The water conveyance line of South-to-North Water Diversion, from south to north, goes from the warm zone into the semi cold area. Under the influence of temperature changes, ice may occur along the line at different degrees, which will af-fect the operational safety and efficiency of water diversion channel. Based on the Saint-Venant equation that is used to describe the unsteady flow in an open channel, the water resistances of frozen and ice sheet sections are analyzed. Furthermore, the modi-fied Saint-Venant equation for the water condition in ice period is obtained, which can provide a theoretical basis for the channel hydraulics simulation in ice period.

关 键 词：冰期 冰封明渠 水力学 非恒定流 圣维南方程 

分 类 号：TV67[水利工程—水利水电工程]