PIANC Smart Rivers 2022

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Abstract : *(250~1000 words)

Hydro-floating ship lift is a new type of the ship lift, which uses water energy as lifting power and independently developed by China. 
During the operation progress of the ship lifting, the water level of the silo is always changing, and the submerged depth of the balance weight also be changed; so the lifting progress of the balance weight will be influenced by the fluctuation of the silo water level, because the balance weight is fixed together with the ship chamber by wire rope and the smoothly running of the ship chamber will be affected. 
The fluctuation problem of the balance weight caused by the coupling between the silo current and the balance weight is the key whether the ship lift can be smoothly run.
In this paper, methods of physical model test and mathematical model are combined to study the operating characteristics of the floating balance weight, under the conditions of different clearance ratio and different body form of the floating balance weight at the bottom. Physical model of a single silo has been established, which uses Jinghong hydro-floating ship lift as the prototype.2D coupling mathematical model between the silo and the balance weight with different clearance ratios, and the 3D coupling mathematical model of the different balance weight’s body form at the bottom has been established. The flow field distribution in the silo, the force on the balance weight, and the acceleration of the balance weight have been calculated though mathematical simulation. 
The results show that: it is helpful to the stable of the floating balance weight during the process of running when the clearance ratio is 0.095~0.061, and cone form(conical angle is 120°) of the floating balance weight at the bottom can solve the problems that the force from the flow and the unevenly distributed water during the clearance. These all provide basic analysis theory for the hydro-floating ship lift to select suitable balance weight’s body form at the bottom, and to determine the best clearance ratio between the silo and the floating balance weight.

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