A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Study on Influence of Environmental Parameters on Dynamic Stall Characteristics of Wind Turbine Blades
Wind turbines in complex environments could encounter dynamic loads that deviate from design values, while the dynamic stall problem could reduce the reliability and safety of wind turbines. In order to accurately evaluate the aerodynamic characteristics of wind turbine blades, the influence on the dynamic stall characteristics of wind turbine airfoil under complex wind farm environmental factors is studied. The variation law of lift coefficient under different working conditions is obtained, and the pressure coefficient and flow field distribution with times are given. The evolution characteristics of vortex on airfoil surface are analyzed. The results show that when the unsteady effect is significant, the closed-loop area of the blades lift coefficient is gradually larger, and the angle of attack for the maximum lift is proportional to it; when the oscillation angle becomes larger, the upper and lower extreme values of the lift force increase, and the lift curve is more obvious in the shape of the oblique “∞.” When the blade appears to be in dynamic stall, the lift coefficient increases quickly and has a hysteresis effect. The maximum increase is up to 46.15%, and the hysteresis effect occurs. The instability of the shear layer, the formation and quenching of the trailing edge vortex are the main causes of the hysteresis effect for the blade lift coefficient. Reasonable evaluation of its value is of great significance for wind turbine blade design in complex wind farm environment.
Study on Influence of Environmental Parameters on Dynamic Stall Characteristics of Wind Turbine Blades
Wind turbines in complex environments could encounter dynamic loads that deviate from design values, while the dynamic stall problem could reduce the reliability and safety of wind turbines. In order to accurately evaluate the aerodynamic characteristics of wind turbine blades, the influence on the dynamic stall characteristics of wind turbine airfoil under complex wind farm environmental factors is studied. The variation law of lift coefficient under different working conditions is obtained, and the pressure coefficient and flow field distribution with times are given. The evolution characteristics of vortex on airfoil surface are analyzed. The results show that when the unsteady effect is significant, the closed-loop area of the blades lift coefficient is gradually larger, and the angle of attack for the maximum lift is proportional to it; when the oscillation angle becomes larger, the upper and lower extreme values of the lift force increase, and the lift curve is more obvious in the shape of the oblique “∞.” When the blade appears to be in dynamic stall, the lift coefficient increases quickly and has a hysteresis effect. The maximum increase is up to 46.15%, and the hysteresis effect occurs. The instability of the shear layer, the formation and quenching of the trailing edge vortex are the main causes of the hysteresis effect for the blade lift coefficient. Reasonable evaluation of its value is of great significance for wind turbine blade design in complex wind farm environment.
Study on Influence of Environmental Parameters on Dynamic Stall Characteristics of Wind Turbine Blades
J. Inst. Eng. India Ser. C
Wang, Long (author) / Wang, Cheng (author) / Sun, Lunye (author)
Journal of The Institution of Engineers (India): Series C ; 101 ; 441-450
2020-06-01
10 pages
Article (Journal)
Electronic Resource
English
Observations of dynamic stall on Darrieus wind turbine blades
| Online Contents | 2001
Analysis of small vertical wind turbine having H-Darrieus blades with stall delay model
| American Institute of Physics | 2013
Research on Dynamic Stall of 3D Wind Turbine under Wind Speed Fluctuation
| Springer Verlag | 2021
Numerical study on a single bladed vertical axis wind turbine under dynamic stall
| British Library Online Contents | 2017
`Stealth' wind turbine blades developed
British Library Online Contents | 2003