摘要
建立了适用于具有复杂内边界的、长距离调水明满流交替的一维非恒定流水力学系统,并基于明渠和管道连接的长距离输水工程,设计了既有明渠流又有压力流的耦合流动模型。为了精确模拟流动的水力特性,分析明满交替流对工程运行的安全性和稳定性带来复杂的影响,采用圣维南方程组和Preissmann窄缝法计算了有压管流和自由表面流以及这两种状态的过渡流等问题,并加入水库、泵站、分水口、暗涵及闸堰等水工建筑物。利用该模型较好地解决了南水北调中线工程北京段遇到明满流耦合计算的问题。
One-dimensional unsteady free-surface-pressure flow hydrodynamic system is developed which is suitable for the longdistance water diversion project with complex inner boundaries. Based on the long-distance water diversion proiect with open channels and pipes, the coupled flow system with both open channel flow and pressure flow is designed. In order to simulate the hydraulic characteristics accurately and analyze the effects of free-surface-pressure flow on the stability and safety of the project, Saint Venant equations and Preissmann slit method were used to calculate the pressure flow, free-surface flow, and the transition flow, and reservoirs, pump stations, diversions, culverts, sluices, and other hydraulic structures were added into the system. The system can solve the problems caused by the free-surface-pressure flow in Beijing section of the South-to-North Water Diversion Project.
出处
《南水北调与水利科技》
CAS
CSCD
北大核心
2015年第3期514-517,共4页
South-to-North Water Transfers and Water Science & Technology
关键词
明满交替流
圣维南方程
Preissmann窄缝法
非恒定流
南水北调工程
free-surface-pressure flow
Saint Venant equations
Preissmann slit method
unsteady flow
South-to-North Water Diversion Project
