Wind Turbine Airfoil Aerodynamic Force Calculation Under Turbulence
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Solution Overview
Problem
Wind turbines operating in environments with high turbulence intensities face challenges in maintaining structural stability and power generation efficiency due to the impact of inflow turbulence on aerodynamic characteristics of airfoils, necessitating a method to calculate aerodynamic forces under varying turbulence conditions.
Innovation Solution
A method and system that measures wind pressure on airfoil surfaces, calculates lift and drag coefficients, performs function fitting to obtain fitted models based on turbulence intensity, and calculates turbulence intensity based on height to determine aerodynamic forces, incorporating wind pressure coefficients and angle of attack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wind turbines operate in high turbulence intensity environments, then power generation capability is maintained, but structural stability deteriorates and power output reduces
Solution Approach 1:
The patent performs preliminary wind pressure measurements and aerodynamic force calculations under different turbulence intensity conditions during the design phase. By pre-establishing the relationship between turbulence intensity and aerodynamic forces through systematic testing and function fitting, the design can anticipate and account for turbulence effects before actual operation, thereby maintaining structural stability while preserving power generation capability in high turbulence environments
2Device complexity
If conventional aerodynamic models are used without considering turbulence intensity, then calculation simplicity is maintained, but accuracy of aerodynamic force prediction deteriorates
Solution Approach 1:
The patent introduces turbulence intensity as a key parameter that modifies conventional aerodynamic models. By performing wind pressure measurements at multiple turbulence intensity levels and establishing fitted functions that incorporate turbulence intensity as a variable, the model accurately captures the effect of turbulence on lift and drag coefficients while maintaining a relatively simple functional form that can be efficiently calculated in practical applications
Data Source
AI summary
The present disclosure provides a method and system for calculating aerodynamic force of a wind turbine airfoil under different turbulence intensities. The method of the present disclosure includes: calculating a lift coefficient and a drag coefficient according to measured wind pressure, performing function fitting to obtain a fitted lift coefficient model and a fitted drag coefficient model at the different turbulence intensities, and selecting a corresponding fitted lift coefficient model and drag coefficient model according to a turbulence intensity on a wind turbine to be measured, to directly calculate a lift coefficient and a drag coefficient for the aerodynamic force of the airfoil.