Numerical simulation method for flood drainage and damp-proof operation scheduling of large flat open gate

Abstract

The invention discloses a numerical simulation method for flood drainage and damp-proof operation scheduling of a large flat open gate. The simulation method comprises the steps of firstly building atwo-dimensional mathematic model, and calculating flood processes and tidal level processes of all frequencies of a river channel; and secondly verifying actual tidal level process, flow velocity andflow process of the river channel through the two-dimensional mathematic model. The two-dimensional mathematic model comprises a three-direction incompressibility and Reynolds value uniform distribution-based Navier-Stokes equation, and obeys a Boussinesq assumption and a hydrostatic pressure assumption; and dynamic simulation of an opening or closing process of the flat open gate is realized through a method for decomposing the opening degree of the flat open gate stage by stage and correspondingly adjusting initial calculation conditions during simulation of the opening degree of all the stages. The technical problems of result distortion and incapability of directly realizing simulation of the dynamic opening or closing process of the flat open gate temporarily in the two-dimensional mathematic model of the river channel due to a scale effect and the like in realizing opening or closing simulation of the flat open gate by utilizing a river physical model are solved.

Description

technical field [0001] The invention belongs to the technical field of simulation calculation methods for flood discharge and tide control operation scheduling, and in particular relates to a numerical simulation method for flood discharge and tide control operation scheduling of large swing gates. Background technique [0002] The type of swing gate has the characteristics of novelty, large span and unique operation mode. It also has the characteristics of arc gate and horizontal sliding gate. It has important application value for flood control projects with long span and low water head. The swing gate located on the tidal river channel, the swing gate is also a tidal gate, its normal operation mode is to close the gate to block water when the tide rises, open the gate to discharge water when the tide falls, and temporarily adjust the river channel on the gate when the tide is blocked , when the water is released, the flow state through the sluice is a variable variable sp...

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Problems solved by technology

[0005] In order to overcome the physical model of the river engineering, the present invention realizes the simulation of the operation and dispatching process of the flood discharge and tide control of the swing gate, but the scale effect of the physical model will lead to simulation distortion, and the dynamic opening and closing of the swing gate cannot be realized temporarily in the two-dimensional mathematical model of the river channel The shortcoming of the simulation of the process, in order to solve the above technical problems, the present invention provides a kind of numerical simulation method of the operation scheduling of large-scale swing gate flood discharge and tide control, the simulation method first establishes a two-dimensional mathematical model, calculates the flood process of each frequency of the river, the tide level process , and then verify the actual tide level process, flow velocity and flow process of the river through the two-dimensional mathematical model

The invention solves the simulation of the operation and dispatching process of the flood discharge and tide control of the horizontal gate by solving the physical model of the river engineering, but the scale effect of the physical model will cause the simulation distortion, and the dynamic opening and closing of the horizontal gate cannot be realized temporarily in the two-dimensional physical model of the river channel Technical Issues in Process Simulation

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