无压引水渠道及前池非恒定流计算模型构建原理与方法  

Principle and Method of Unsteady Flow Calculation of Open Channel and Forebay

作　　者：曾赟[1] 胡岚平 

机构地区：[1]四川农业大学信息与工程技术学院,四川雅安625014 [2]四川省港航开发有限责任公司,四川成都610041

出　　处：《水电能源科学》2013年第9期82-85,共4页Water Resources and Power

基　　金：国家科技支撑计划基金资助项目(2010NZ0105)

摘　　要：为计算水电站在负荷变动下渠道和压力前池的水位波动过程、分析渠道末端扩散段和压力前池对明渠水位波动的影响,基于明渠和有压管非恒定流理论,采用特征线法求解明渠和压力管道的圣维南方程组、变时步特征线法解决无压渠道和压力管道不同时间步长,构建了"无压引水渠道+扩散段+压力前池+压力钢管"数学模型,并利用Matlab软件编制相应的计算程序。In order to calculate the water level fluctuation process of open channel and pressure forebay under variation load in hydropower station and analyze the impact of the end diffusion segment and pressure forebay on the water level fluctuation of the open channel, the mathematical model of ＂open channel ＋ diffusion segment ＋ pressure forebay ＋ penstock＂ is established based on the unsteady flow theory of open channel and pressure pipe. And Matlab language is used to compile the corresponding computer program. The characteristic method is applied to solve the Saint--Venant e- quations of open channel and pressure pipe, and the characteristic method with variable time steps is used to solve the dif- ferent time span between open channel and pressure pipe.

关 键 词：无压引水渠道 扩散段 压力前池 侧堰 非恒定流 数值模拟 

分 类 号：TV133[水利工程—水力学及河流动力学]