泵站从长距离明流隧洞引水的水力过渡过程  

Hydraulic Transient on Pump Station Diversion from Long Free-flow Tunnels

作　　者：李甲振[1] 王涛[1] 郭永鑫[1] 薛兴祖 纪昌知 LI Jia-zhen;WANG Tao;GUO Yong-xin;XUE Xing-zu;JI Chang-zhi(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Jilin Provincial Water Resources and Hydropower Consultative Company,Changchun 130021,Jilin Province,China;China Three Gorges Construction Engineering Corporation,Hangzhou 310052,Zhejiang Province,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]吉林省水利水电勘测设计研究院,吉林长春130021 [3]中国三峡建工(集团)有限公司,浙江杭州310052

出　　处：《中国农村水利水电》2023年第9期122-126,134,共6页China Rural Water and Hydropower

基　　金：重点研发计划项目(2022YFC3202505);国家自然科学基金项目(52179082,U2243221)。

摘　　要：泵站从长距离明流隧洞或明渠的中部引水是一种常见的工程布置形式,水力过渡过程计算通常涉及无压、有压输水系统耦合。以典型泵站工程为例,提出了无压、有压输水系统耦合的求解算法,给出了泵站事故断电、正常启动、停机的控制策略和水力特性。无压、有压输水系统可分别采用长、短时间步,假定一个长时间步内的连接处水位恒定,计算有压输水系统的水力瞬变过程,无压输水系统只考虑连接处流量影响。研究工程中的闸门井,不仅是截流元件,还应考虑其调压塔效用。研究成果可为类似工程的水力过渡过程计算提供参考。It is a common arrangement for pump station diversion from the middle of long free-flow tunnel or channel.The hydraulic transient calculation usually involves the coupling of pressure flow and free flow.Taking a typical pump station as an example,this paper presents a method to solve the pressure flow and free flow as well as the control strategies and hydraulic characteristics on accident power off,normal start,and normal stop.The free and pressure flow can adopt long and short time steps.During a long time step,the water level of the connec⁃tion point is assumed constant,and the hydraulic transient of pressure flow is determined.The discharge of the connection point is then used in the calculation of free flow.The gate in the studied case should be considered as not merely a cut-off unit but a surge tank.The result serves as a reference for the hydraulic transient calculation of other similar projects.

关 键 词：明流隧洞 泵站引水 水力过渡过程 耦合求解 

分 类 号：TV133[水利工程—水力学及河流动力学]