A three-dimensional wind turbine wake calculation method considering yaw effect

By introducing the theory of mass and momentum conservation under yaw conditions into the three-dimensional wake model, the accuracy and efficiency problems of yaw wind turbine wake prediction in the existing technology are solved. A three-dimensional wind turbine wake calculation method considering the yaw effect is established, which realizes accurate prediction of wake center offset and velocity distribution, and supports the research on wind farm optimization strategies.

CN119312732BActive Publication Date: 2026-05-26NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date
2024-10-18
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies are unable to quickly and accurately predict the wake center offset and wake velocity distribution of yaw wind turbines, which cannot meet the optimization needs of wind farms after construction. Furthermore, existing models suffer from problems such as long computation time, insufficient accuracy, or complexity that limits large-scale application.

Method used

Based on the three-dimensional wake model, the theory of mass and momentum conservation under yaw conditions is introduced. Taking into account the inflow wind conditions, local geographic information, unit aerodynamic characteristics and operating conditions, the method for calculating the three-dimensional wind turbine wake considering the yaw effect is established through AD/LES numerical simulation and UAV field measurement examples. The calculation process includes steps S1 to S6.

Benefits of technology

Accurate prediction of wake center offset and wake velocity distribution of yaw wind turbines provides a theoretical basis and technical support for wind farm yaw optimization strategies. The model exhibits good accuracy and versatility under different conditions and is applicable to different turbine models and inflow wind conditions.

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Abstract

This invention discloses a three-dimensional wind turbine wake calculation method considering yaw effect, comprising: calculating the inflow velocity distribution profile u0(z) and turbulence intensity distribution profile I0(z) of the incoming wind according to the basic laws of turbulent motion within the boundary layer; calculating the axial flow induction factor a under the yaw state of the wind turbine; and then determining the wake expansion radius r at the downstream x position of the wind turbine. x ; Calculate the additional turbulence intensity I at position x in the wake region. add,x ; Calculate the wake center offset y d (x), then determine the radiation radius r with the wake center as the center; determine the wake region of the wind turbine, and calculate the average wake velocity u of the wake region at a vertical height z position x distance downstream of the wind turbine. * (x,z); The velocity distribution in the wake region of the wind turbine is calculated. This invention can accurately predict the wake center offset and wake velocity distribution characteristics of yaw wind turbines.
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