基于CFD的压力前池水力过渡过程流态特性分析  

CFD Analysis of Flow Characteristics in Hydraulic Transient Process in Forebay

作　　者：孛华江 张法星[1] 张恩宝 张晓龙 蔡爱玲 BO Huajiang;ZHANG Faxing;ZHANG Enbao;ZHANG Xiaolong;CAI Ailing(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065;Chengdu Engineering Corporation Limited,Chengdu,Sichuan 610072)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《四川水力发电》2022年第4期1-5,134,共6页Sichuan Hydropower

基　　金：四川省科技计划资助(2019JDTD0007)。

摘　　要：为明确某水电站压力前池体型设计能否满足水力过渡过程要求,以某水电站无压引水渠-前池系统为研究对象,采用非恒定RNG k-ε湍流模型,对机组全甩负荷、最后一台机组增负荷两种工况下,压力前池及前部无压引水渠道段水流非恒定流动进行了三维数值计算。分析了两种典型工况下,压力前池内的水位变化过程,最高和最低涌波水位及前池内的流态、流速变化情况。结果表明:压力前池体型设计合理,RNG k-ε湍流模型在水力过渡过程评估中有广泛应用前景。In order to check whether the forebay shape in a hydropower project can meet the requirements of hydraulic transient,an open channel-forebay system of the hydropower project is taken as the research object.The RNG k-εturbulence model is used to carry out three-dimensional numerical calculation of unsteady flow in the open channel-forebay system under two typical conditions:total load rejection of all units and load acceptance of the last unit.The variation process of water level,the highest and the lowest surge water level,the variation of flow state and velocity of typical section in the forebay are analyzed.The results show that the design of the forebay is reasonable,and the RNG k-εturbulence model has a wide application prospect in the evaluation of hydraulic transient.

关 键 词：压力前池 RNG k-ε湍流模型 水力过渡过程 涌波水位 流速分布 

分 类 号：TV135[水利工程—水力学及河流动力学] TF803.114[冶金工程—有色金属冶金] TV732.6