Title :
The study of aeroelastic stability for wind turbine blades
Author :
Liangyou, Hong ; Dongxiang, Jiang ; Chao, Liu ; Qian, Huang
Author_Institution :
Dept. of Thermal Eng., Tsinghua Univ., Beijing, China
Abstract :
In this paper, a 15 DOF elastic beam element is developed. Hodges-Dowell´s partial differential equations are adopted as blade motion equations, but gravity effect is included also. The nonlinear aerodynamic force is calculated by BEMT combined with the Raj 3-D stall-delay model. Then the aerodynamic model is coupled into the structural dynamic model. The equations of motion for the nonlinear periodic time variant system are calculated by implicit Newmark scheme. Finally, the aerodynamic model is verified and shows good agreement with experiment data. An engineering example on wind turbine is carried out by this coupled model. The result is compared with results in other literatures. The gravity effect is focused. And the blade response under different condition is present and discussed.
Keywords :
blades; elasticity; mechanical stability; wind turbines; DOF elastic beam element; Hodges-Dowell partial differential equations; Raj 3D stall-delay model; aeroelastic stability; blade motion equations; gravity effect; implicit Newmark scheme; nonlinear aerodynamic force; nonlinear periodic time variant system; wind turbine blades; Aerodynamics; Blades; Chaos; Differential equations; Gravity; Nonlinear equations; Partial differential equations; Stability; Thermal engineering; Wind turbines; Aerodynamics; Aeroelasticity; Structural dynamic; Wind turbines;
Conference_Titel :
Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4934-7
DOI :
10.1109/SUPERGEN.2009.5348153
