A Vortex Lifting Line Method for the Analysis of Horizontal Axis Wind Turbines

1986 ◽  
Vol 108 (4) ◽  
pp. 303-309 ◽  
Author(s):  
A. A. Afjeh ◽  
T. G. Keith
Keyword(s):  
Wind Turbines ◽  
Operating Conditions ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbines ◽  
Bladed Rotor ◽  
Load Analysis ◽  
Wake Model ◽  
Free Wake ◽  
Lifting Line ◽  
Lifting Line Method

The present paper utilizes an earlier analytical wake model, which essentially applies to helicopter load analysis, to determine the performance of horizontal axis wind turbines. The advantage of this method is that it makes use of an integrated version of the Biot-Savart law for each part of the wake and thereby avoids some of the numerical difficulties present in the Biot-Savart law. Numerical computations were performed for a number of two-bladed rotor geometries and operating conditions. Results were compared with experimental data as well as with predictions of a full free wake method. Good overall agreement with both was observed.

Investigation and validation of 3D wake model for horizontal-axis wind turbines based on filed measurements

2020 ◽  
Vol 260 ◽  
pp. 114272 ◽  
Author(s):  
Xiaoxia Gao ◽  
Bingbing Li ◽  
Tengyuan Wang ◽  
Haiying Sun ◽  
Hongxing Yang ◽  
...  
Keyword(s):  
Wind Turbines ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbines ◽  
Wake Model

Analysis on Aerodynamic Performance of Horizontal Axis Wind Turbine Based on Nonlinear Wake Model

2013 ◽  
Vol 448-453 ◽  
pp. 1716-1720
Author(s):  
Rui Yang ◽  
Jiu Xin Wang ◽  
Sheng Long Zhang
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Optimization Design ◽  
Aerodynamic Performance ◽  
Horizontal Axis ◽  
Wake Vortex ◽  
Horizontal Axis Wind Turbine ◽  
Horizontal Axis Wind Turbines ◽  
Wake Model ◽  
Induced Velocity

A computational method based on nonlinear wake model was established for horizontal axis wind turbines aerodynamic performance prediction. This method makes use of finite difference method to solve the integral differential equation of the model, the induced velocity of wake vortex can be calculated from equations and compared with the induced velocity of wake vortex in linear model. The comparison between the calculated results of wind turbine under axis flow condition, including tip vortex geometry and aerodynamic performance, and available experimental data shows that this method is suitable for wind turbine aerodynamic performance analysis. Finally, a series of numerical calculations were made to investigate the change of wake geometry and aerodynamic performance of the wind turbine when yawing and pitch angle increasing, which provide foundations for aerodynamic optimization design of horizontal axis wind turbines.

Validation of a Dynamic Prescribed Vortex Wake Model for Horizontal Axis Wind Turbines

2007 ◽  
Author(s):  
Hugh D. Currin ◽  
Frank N. Coton
Keyword(s):  
Structural Dynamics ◽  
Wind Turbines ◽  
Horizontal Axis ◽  
Vortex Wake ◽  
Dynamic Flow ◽  
Unsteady Aerodynamic ◽  
Horizontal Axis Wind Turbines ◽  
Aerodynamic Experiment ◽  
Wake Model

A new aerodynamic wake model for Horizontal Axis Wind Turbines has been developed. The prescribed vortex wake code HAWTDAWG has been extended to dynamic flow and incorporated into AeroDyn. Linkage to the FAST structural dynamics code is retained. Static and dynamic yawed flow validation is done against Unsteady Aerodynamic Experiment Phase VI data as well as against existing code results.

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