Hydrodynamic condition parallel numerical simulation method for channel with various structures

Abstract

The invention relates to a hydrodynamic condition parallel numerical simulation method for a channel with various structures. The method comprises the following steps of: supposing flow at each structure, correcting the supposed flow according to a given relationship between the flow at each structure and water level or the water level on the upper side of each structure, and providing a lower boundary condition and an upper boundary condition for upstream and downstream channel sections of each structure according to equal flow on the two sides of each channel structure, so that a closed equation set is established for each channel section, and each equation set only contains the variable of the same channel section; and keeping the band characteristic of a coefficient matrix dispersed by an implicit differential method, ensuring that the physically connected channel sections are relatively independent numerically, solving the variables of the channel sections by using a band matrix, and correcting the flow at each structure by a Newton-Raphson iteration method to make the flow fulfill the aim of regulation. By the method, the original program for solving the hydrodynamic condition of a single channel is not required to be greatly changed, the hydrodynamic condition of the channel with various structures can be parallelly solved, and the aim of regulating water quantity is fulfilled.

Description

technical field [0001] The invention relates to a hydrodynamic numerical calculation method, in particular to a parallel numerical simulation method for hydrodynamic conditions of channels containing various structures for solving the hydrodynamic conditions of water diversion or irrigation channels. Background technique [0002] In river water conservancy projects, water can be artificially transferred from areas rich in water resources to areas poor in water resources by means of water diversion channels or irrigation channels, thereby effectively alleviating the serious shortage of water resources in some areas. The large-scale project - South-to-North Water Diversion is a typical application case. Due to the large space span of water transfer channels and irrigation channels, various types of structures such as gates or power stations are often required to be installed in the channels during the water transfer process. Solving the hydrodynamic conditions of channels wit...

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Problems solved by technology

The solution process of these two methods is time-consuming and inefficient, and when the structure in the channel changes, the corresponding calculation program code needs to be modified to a certain extent, and the program has poor versatility and portability

Although there is currently a parallel solution method that can solve the above problems, see "A Parallel Numerical Simulation Method for Hydrodynamic Conditions of Rivers Containing Cascade Hydropower Stations" (Application No. 201210172062.1), but this method is only suitable for solving Hydrodynamic Conditions of Multilevel Channels with Water Level Dependent Structures

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