Water level and flow estimation method for free surface flow

A technology of surface flow and water level, applied in instrumentation, design optimization/simulation, electrical digital data processing, etc., can solve problems such as inability to meet time node requirements, large cross-section spacing, difficult hydraulic calculation, etc., to improve stability and reliability. , the effect of eliminating numerical shock and reliable technical support
CN112464584AActive Publication Date: 2021-03-09CHANGJIANG SURVEY PLANNING DESIGN & RES
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGJIANG SURVEY PLANNING DESIGN & RES
Publication Date
2021-03-09

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Abstract

The invention provides a water level and flow estimation method for free surface flow, which is characterized by comprising the following steps: a, performing data processing on river cross section information, and establishing a linear relationship among a water level, a cross section area, a cross section wetted perimeter and a hydraulic radius on each calculation cross section; carrying out datamation processing on the model parameters, the initial conditions and the boundary conditions; b, substituting the linear relation and data of the model parameters, the initial conditions and the boundary conditions into a one-dimensional hydrodynamic basic control equation, performing numerical solution, and deducing a next moment value according to the boundary conditions and a known moment value in sequence until calculation requirements are met; and c, outputting section flows and section water levels at different moments and water level processes and flow processes of different sections.Reliable technical support is provided for engineering planning, design and flood analysis and management.
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Description

technical field

[0001] The invention relates to the technical field of computational fluid dynamics, in particular to a method for calculating water level and flow of free surface flow. Background technique

[0002] The process of free surface flow exists widely in nature and is closely related to practical engineering problems. For example, the calculation of the water surface line and flow of a river (channel, port) is an important basis for river design; the prediction of river flood evolution can be used for disaster prevention. The formulation of the disaster reduction plan provides technical support; accurate forecasting of the dam break flood process can effectively reduce the loss of life and property in the disaster-stricken area.

[0003] In engineering planning and design, most of the empirical formulas in the industry design codes are used to calculate the flow and water level of river sections; section type), and cannot reflect the impact of backwater condition...

Claims

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