Design method for optimizing flow regime of urban large-size slow-flow landscape water bodies

Abstract

The invention relates to a design method for optimizing flow regime of urban large-size slow-flow landscape water bodies, provides design of optimizing the flow regime of slow-flow water bodies and operation evaluation index, and provides a design and operation method to water bodies with different circulation flows and different inlet velocities. The design method adopts multi-target optimal models to represent the mentioned problems, and analog computation speed is increased greatly by the aid of parallel computation technology on the basis of selecting the optimization algorithm to solve. Since the optimization index of the flow regime is put forwards and multiple schemes are subjected to analog computation and comparison, parameters including the water body flow weighted mean, water body velocity distribution parameters, low-flow water body percentage and the like obtained from the optimum scheme are better than corresponding indexes generated from a water body circulation scheme put forwards by the existing computation method, and water body circulation effect and water body quality are improved accordingly.

Description

technical field [0001] The invention relates to a design method for optimizing the flow state of a large urban slow-flow landscape water body. It can also be used to determine the lifting flow rate of the water body circulation pump and the water intake gate according to the level of the lake water level and the quality of the water after the water body circulation system is completed. Control parameters and measures such as the switch state and the opening size of the water inlet gate. Background technique [0002] Due to its own structural characteristics, the large-scale urban landscape slow-flowing water body determines the complexity and diversity of its flow regime. Due to the limitations of the CFD software itself, it is necessary to make specific settings for the import and export when meshing. Once the position and size of the inlet are changed during the calculation process, it will involve re-division and setting of the grid, and because of the large area of ​​th...

AI Technical Summary

Problems solved by technology

[0003] In view of the current problems that many urban water bodies are closed, stagnant, and water quality is extremely easy to deteriorate, the water circulation method is adopted to increase the flow rate of the water body and strengthen the reoxygenation of the water body, thereby improving the water quality of the water body and improving the quality of the water environment

Based on the establishment of a multi-scheme automatic simulation calculation method for the flow state design of large-scale slow-flow landscape water body, the present invention solves the problem of different circulation flow rates, different water inlet flow rates, etc. when designing and operating the water body circulation system. To simulate the flow state of water bodies under different operating conditions, improve the efficiency of simulation calculations, etc., and propose a design method for the optimization of water body flow state in urban large-scale slow-flow landscapes

[0004] The present invention solves the problems of strong subjectivity, limited comparison and selection schemes, and difficulty in determining the optimal scheme caused by manual comparison and selection of most of the landscape water body flow state simulations at the present stage, and also solves the problem that the simulation calculation time is too long when a large number of schemes are compared and selected However, it is a problem that is difficult to implement, and it provides a new technology for the optimal design of urban large-scale landscape water flow.

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