Method for carrying out parallelization numerical simulation on hydrodynamic force conditions of river provided with cascade hydropower station

Abstract

The invention relates to a method for carrying out parallelization numerical simulation on hydrodynamic force conditions of a river provided with a cascade hydropower station. According to the method, a closed equation set is established for each course by setting an upper level or a flow-level relation of a river channel structure as a lower boundary condition of an upper reach and supposing that a lower level of the structure is used as an upper boundary condition of a lower reach; and each equation set only comprises variables of the same reach, a coefficient matrix formed by adopting an implicit difference scheme to carry out dispersion are still kept having the banded characteristics and the physically related reaches are relatively independent on the aspect of value, so that the variables of the reaches can be solved by applying the banded matrix and the aim of ensuring the flows at both sides of the structure equal is fulfilled by iterating and correcting the lower level of the structure. Compared with the conventional method of solving the hydrodynamic conditions of the river by the single course, the method disclosed by the invention has the advantages that the rapid parallel solution of the multi-course river hydrodynamic conditions can be implemented without modifying an original sequence program of solving the river hydrodynamic conditions on a large scale; the operation process has short time consumption; and the efficiency is high.

Description

technical field [0001] The invention relates to a river hydrodynamic numerical calculation method, in particular to a parallel numerical simulation method for hydrodynamic conditions of rivers with cascaded hydropower stations for solving the hydrodynamic conditions of multi-level rivers. Background technique [0002] In river water conservancy projects, cascade hydropower stations refer to a group of hydropower stations built on the same river with upstream and downstream connections. For example, the Three Gorges Hydropower Station and its downstream Gezhouba Hydropower Station constitute a cascade hydropower station. The flow regulation between the upper and lower cascades of cascade hydropower stations is closely related to improving sediment erosion and deposition and navigation control and many other issues. Solving the hydrodynamic conditions of the river is a necessary condition for the cascade hydropower station to realize macro dispatch and flow control. At presen...

AI Technical Summary

Problems solved by technology

However, when there are structures such as cascade hydropower stations in the river channel, the river channel is usually divided into two river sections at the structure, and solved step by step in order, that is, after solving the first-level river section to obtain its lower boundary conditions, It is used as the upper boundary condition of the second-level river section and then the calculation of the second-level river section is carried out. In this way, the whole solution process takes a long time and is inefficient, and when the structures in the channel change, it is necessary to Modification of computer program codes within a certain range, poor versatility and portability of the program

Images