分洪区口门流量淹没系数的研究  

A Study of Submerged Coefficient of Gate in Flood Diversion Area

作　　者：王彩虹[1] 张小峰[1] 吕孙云 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]长江水利委员会水文局,武汉430010

出　　处：《中国农村水利水电》2012年第4期130-132,138,共4页China Rural Water and Hydropower

基　　金：教育部博士点基金支持(200804860023)

摘　　要：采用平面二维数学模型,计算分析了分洪区口门的堰流流量系数和淹没系数的变化过程。结果表明,在自由溢流时,分洪区口门的堰流流量系数和正向堰流的流量系数基本一致。在淹没溢流时,在淹没度为0.8～0.98范围内,分洪区口门堰流的淹没系数与普通水力学的正向堰流的淹没系数基本一致;对淹没度在0.98～1.0范围(正向堰流不存淹没度为0.98～1.0范围的堰流),通过数学模型的计算分析给出了淹没度在这个范围内的分洪区口门堰流的淹没系数。所得结果可以为分洪区口门的流量计算作参考。In this paper,plane two-dimensional numerical model is conducted to analyze the variation law of flow coefficient and submerged coefficient of gate in flood diversion area.Some conclusions can be drawn from the results.In the free overflow,the flow coefficient of gate in flood diversion area almost equals that of forward flow on the weir.When the submerged degree ranges from 0.8 to 0.98,the submerged coefficient of gate in flood diversion area equals that of forward flow on the whole.While the submerged degree ranges from 0.98 to 1.0（the forward flow on the weir doesn＇t exist this range of submerged degree）,plane two-dimensional numerical model is established to give the answer to submerged coefficient of flood diversion area and the result can guide the discharge calculation of gate in flood diversion area.

关 键 词：平面二维 正向堰流 分洪区口门堰流 流量系数 淹没系数 

分 类 号：TV132.2[水利工程—水力学及河流动力学]