Wind power plant fan wake flow dynamic coupling simulation method

A technology of dynamic coupling and simulation method, applied in the field of computational wind engineering, to achieve the effect of simple data structure, fast generation speed and good grid quality

Pending Publication Date: 2021-06-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] However, the limitation of this method is that during the iterative process of CFD calculation of the flow field, the volume force source item (ie, the fan resistance item) added to the grid unit where the actuating disk is located is always a certain value

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  • Wind power plant fan wake flow dynamic coupling simulation method
  • Wind power plant fan wake flow dynamic coupling simulation method
  • Wind power plant fan wake flow dynamic coupling simulation method

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specific Embodiment

[0061] 1. Select the research terrain area, determine the calculation domain, and establish the calculation domain grid model under complex terrain according to the GIS elevation data;

[0062] 1.1 Select longitude 116.2° and latitude 39.8° as the origin coordinates of the bottom center of the target calculation domain, select a calculation domain model with a length, width and height of 800m, and obtain the terrain elevation DEM data file of the calculation domain from the GIS system;

[0063] 1.2 Use a meshing program to divide the computational domain into meshes. The number of meshes in each layer is equal and is a triangular mesh unit. Each unit is in the shape of an irregular triangular prism as a whole;

[0064] 1.3 Import the DEM data file to the server, and then use the self-programmed program to raise or lower the Z coordinate of the bottom grid of the already divided computational domain grid model according to the DEM data file, and interpolate to simulate the CFD m...

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Abstract

The invention belongs to the field of computational wind engineering, and particularly discloses a wind power plant fan wake flow dynamic coupling simulation method, which comprises the following steps of: S1, dividing a computational domain into a plurality of grid units, further establishing a computational domain grid model, and simultaneously obtaining relevant parameters of a fan; s2, dividing the fan actuating disc into a plurality of radially equidistant circular rings, respectively calculating axial force and tangential force corresponding to each circular ring according to the wind speed, distributing the axial force and tangential force to each grid unit contained in the circular rings to obtain a resistance item of each grid unit, and establishing a corresponding relation model of the wind speed and the resistance item; and S3, based on the computational domain grid model, carrying out numerical simulation on the fan wake flow, adding a resistance item to a corresponding grid unit during simulation, and dynamically calculating and updating the resistance item according to the changed wind speed and the corresponding relation model. The resistance item is correspondingly and dynamically added according to the incoming flow wind speed, the disturbance effect of the flow field and the draught fan on the flow field can be calculated in a coupling mode, and the wake flow distribution condition of the draught fan is truly reflected.

Description

technical field [0001] The invention belongs to the field of computational wind engineering, and more particularly relates to a method for dynamic coupling simulation of wind turbine wake in a wind farm. Background technique [0002] In a wind farm, after the wind passes through the wind turbine, there will be a wake area, that is, a wind speed attenuation area. This phenomenon is called the wake effect, which will lead to a significant reduction in the power generation of the wind turbine downstream of the wind turbine. Therefore, it is of great significance to carry out the research on the wake of wind turbines to improve the power generation of wind turbines. With the development and improvement of computer technology, the method of CFD (Computational Fluid Dynamics) is widely used in the numerical simulation of fan wake, and most of the researches of many scholars at home and abroad are based on this. [0003] In earlier studies, Yan Haijin et al. carried out full-model...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F111/10G06F113/06G06F113/08G06F119/14
CPCG06F30/28G06F2111/10G06F2113/06G06F2113/08G06F2119/14
Inventor 刘震卿樊双龙
Owner HUAZHONG UNIV OF SCI & TECH
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