摘要
本文采用重力相似准则,建立了原型梯形复式断面无坝引水工程的室外试验模型,解决了在无坝引水工程中开展试验观测难度大的问题。同时对主河道与明渠交叉点即明渠进水口及主河道上下游的流速进行了三维观测,探讨了不同河流断面位置处的流速变化,为未来无坝引水工程通过水流流速变化进行泥沙淤积治理提供理论参考。
In this paper,the outdoor experimental model based on the prototype of water diversion work without dam for trapezoidal compound cross section was established by using the gravity similarity criterion.The difficult problem of carrying out experiment observation in water diversion work without dam was solved.And the flow velocity of the junction of main river channel and open channel,namely the open channel inlet,and the upstream and downstream of main river channel was three-dimensionally observed.The flow velocity changes at different locations of river cross section were discussed.The result can be considered as a theoretical reference for future sediment regulation of water diversion work without dam by changing the flow velocity.
关键词
无坝引水工程
流场
明渠进口
重力相似准则
water diversion work without dam
flow field
open channel inlet
gravity similarity criterion
