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Water flow elaborate simulation method of hydraulic of hydropower station

A simulation method and hydraulic technology, applied in the simulation process of specific applications, electrical digital data processing, special data processing applications, etc., can solve the problem that there is no similarity law between the model and the prototype, and the model measurement cannot be completely used as the judgment of the stability of the prototype turbine According to other problems, to achieve the effect of reducing pressure pulsation

Inactive Publication Date: 2007-08-15
CHINA THREE GORGES UNIV
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Problems solved by technology

At the same time, on the pressure pulsation problem, there is no complete similarity law between the model and the prototype
Therefore, the measurement of the model cannot be completely used as the basis for judging the stability of the prototype turbine

Method used

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Embodiment Construction

[0006] Combined with the needs of the turbines of the Three Gorges Project, the fine simulation of the hydrodynamic complex water flow of the power station has been carried out, and a breakthrough has been made, with remarkable economic and social benefits.

[0007] (1) Numerical simulation of 3D steady and unsteady turbulent flow of Francis model and prototype turbine:

[0008] ① Numerical simulation of the Francis model and the three-dimensional steady and unsteady turbulent flow of the prototype turbine, taking the flow in the entire channel from the volute inlet to the draft tube outlet in the turbine as the computational fluid dynamics (CFD) calculation object. Complete 3D steady or unsteady turbulent flow simulation in one go. The amount of calculation is large, but the calculation boundary conditions can be accurately given, and the interaction between dynamic and static components can be fully considered.

[0009] ②Adopt the adaptable unstructured tetrahedron and stru...

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Abstract

This invention discloses one water power station stream fine analogue method in water engine technique field, which can fulfill water turbine total channel three-dimensional and non-constant flow computation; computing the water turbine for three dimensional constant hollow flow and analyzing the space generation rules; reducing the water turbine pressure impulse composed of rotation wheel leakage tamper shape and length and tail tube shape; based on three-dimensional flow computation studying one generation of high property X leave modern optimization design method.

Description

technical field [0001] The invention relates to a fine water flow simulation method for hydrodynamics of a hydropower station. Background technique [0002] In terms of power station hydraulics, with the development of turbine capacity and size, serious problems of vibration and blade breakage have arisen. Hydraulic stability becomes another criterion in the design of large Francis turbines. The pressure pulsation in the flow channel is one of the main factors affecting the stability of the turbine. However, due to the complex structure of the turbine, the full flow channel measurement of the pressure pulsation in the model requires a lot of work and high cost. The pressure pulsation in the turbine should be predicted in the design to obtain a hydraulic model of the turbine with good stability. At the same time, on the pressure pulsation problem, there is no complete similarity law between the model and the prototype. Therefore, the measurement of the model cannot be com...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06G7/48
Inventor 戴会超吴玉林刘树红田斌彭辉
Owner CHINA THREE GORGES UNIV
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