Wind turbine generator single wake flow distribution simulation method based on CFD pre-calculation

A wind turbine and distributed simulation technology, applied in calculation, design optimization/simulation, instrument, etc., can solve the problems of difficult application timeliness, long calculation time, and large consumption of computing resources, so as to reduce the amount of calculation, improve efficiency, and improve The effect of computational precision

Inactive Publication Date: 2020-04-21
HUANENG CLEAN ENERGY RES INST
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Problems solved by technology

However, the CFD simulation method consumes a lot of computing resources and takes a long time. Even if the actuator disc model has be

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  • Wind turbine generator single wake flow distribution simulation method based on CFD pre-calculation
  • Wind turbine generator single wake flow distribution simulation method based on CFD pre-calculation
  • Wind turbine generator single wake flow distribution simulation method based on CFD pre-calculation

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Embodiment Construction

[0030] The present invention will be further described in detail with the accompanying drawings and specific embodiments below, which are explanations rather than limitations of the present invention. The embodiment calculates the distribution of velocity loss in the wake region in the vertical direction at different downstream distances of the wind turbine, and compares the calculation results with the wind tunnel experimental data.

[0031] The diameter D of the wind turbine rotor is 0.27m, the hub height h is 0.3125m, and the surface roughness z0 of the wind tunnel is 0.075m. Table 1 shows the thrust coefficients corresponding to different incoming wind speeds when the tip speed ratio λ of the unit is 2.9 and 5.1 respectively. Experimentally measured the wake velocity distribution under two tip speed ratios when the incoming wind velocity is 5.3m / s.

[0032] Table 1 Thrust coefficients corresponding to different incoming wind speeds under two tip speed ratios

[0033] ...

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Abstract

The invention discloses a wind turbine generator single wake flow distribution simulation method based on CFD pre-calculation, and belongs to the technical field of detection. Modeling is carried outon unit wake flow fields at several different incoming flow wind speeds in advance, then CFD numerical simulation is carried out, and a unit wake flow field information database at discrete incoming flow wind speeds is obtained; wake flow field speed distribution of the unit at any incoming flow wind speed is obtained through an interpolation method based on the database. Different CFD simulationmethods can be selected according to different requirements for wake flow simulation precision in engineering, the method has high efficiency and high precision, and timeliness can meet actual engineering requirements.

Description

technical field [0001] The invention belongs to the technical field of wind turbine wake calculation technology, and in particular relates to a single wake distribution simulation method of a wind turbine based on CFD pre-calculation. Background technique [0002] In large-scale wind farms, the loss of wind power generation due to the wake effect usually accounts for 10% to 20% of the annual power generation. Accurately simulating the wake distribution of wind farms is the basis for evaluating the power generation and economics of wind farms. In the micro-site selection of wind farms, it is necessary to simulate the wake field in the wind farm multiple times in a short period of time. It is required that the wake simulation method used can not only ensure a certain calculation accuracy, but also the calculation efficiency must meet the engineering requirements. . The current wake simulation methods can be divided into two categories: the first category is the engineering wa...

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Application Information

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IPC IPC(8): G06F30/20G06Q50/06
CPCG06Q50/06
Inventor 邵振州刘永前李莉李宁杨运家
Owner HUANENG CLEAN ENERGY RES INST
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