The Ply Optimum Design of Composites Wind Turbine Blade Based on the Local Stability

2014 ◽  
Vol 988 ◽  
pp. 445-448 ◽  
Author(s):  
Ying Jun Wang ◽  
Si Rong Zhu ◽  
Jian Jun Wang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Local Stability ◽  
Optimization Design ◽  
Wind Turbine Blade ◽  
Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
The Stability ◽  
Ply Orientation

Fluid-solid coupling calculations are performed on design of a wind turbine blade made by fiber reinforced polymer composites. The length of the blade is 46m, and it is for a 3MW-capacity power station. By the finite element method, the initial design on the ply is carried out under the case of static loads. Then, the eigenvalue buckling theory is used to analyze the stability. In the process of design, sections of the blade which have different stiffness have different ply orientation and thickness. Thus, the local structural stiffness is enhanced, and the local stability of the blade is improved. The results show that the buckling load coefficient increases from 3.3 to 4.2, and the weight of the blade reduces by 4.5%. The aim of optimization design on the wind turbine blade has been achieved.

Flow Behavior in the Resin Infusion of Glass Fiber Reinforced Polymer Wind Turbine Blade

2013 ◽  
Vol 686 ◽  
pp. 118-124 ◽  
Author(s):  
Mohd Azuan Mohd Azlan ◽  
Muhamad Ridzuan Abdul Latif ◽  
Mohamad Zaki Abdullah ◽  
Kamal Arif Zainal Abidin ◽  
Azmi Abdul Wahab
Keyword(s):  
Wind Turbine ◽  
Glass Fiber ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Fiber Reinforced Polymer ◽  
Glass Fiber Reinforced Polymer ◽  
Resin Infusion ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Over Time

This paper presents the monitoring of resin flow during resin infusion process in the fabrication of glass fiber reinforced polymer GRP wind turbine blade (WTB). Epoxy type of resin was used as the matrix and its viscosity and gel time were determined in-house. Next, resin infusions were done to obtain the permeability of the glass fiber in different directions (longitudinal and transverse), given the specific number of layers. The fabrication of composite WTB by resin infusion was conducted with the introduction of 'moldless' setup, where both upper and lower skins are covered by flexible mould/vacuum bag without any rigid female mould. However, a wooden core is used and acts as an “inner” mould to obtain the wind turbine shape. The whole infusion process was video recorded and the flow front pattern was traced at certain time intervals to investigate the infused percentage area over time. Afterward, guided by the traces of flow patterns on grid and video observation, 3D models of resin infused at interval times are generated in a CAD software. From the models, the area infused was determined. Percentage of area infused over time was compared with the analytical plot based on Darcy's law. A good agreement was found between the experimental observation and the theoretical plot.

Anti-flutter optimization design of airfoil for wind turbine blade

2018 ◽  
Vol 10 (1) ◽  
pp. 013307
Author(s):  
Qiang Gao ◽  
Xin Cai ◽  
Rui Meng ◽  
Jie Zhu
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Optimization Design ◽  
Wind Turbine Blade

scholarly journals Structural Optimization Design of Large Wind Turbine Blade considering Aeroelastic Effect

2017 ◽  
Vol 2017 ◽  
pp. 1-7
Author(s):  
Yuqiao Zheng ◽  
Yongyong Cao ◽  
Chengcheng Zhang ◽  
Zhe He
Keyword(s):  
Structural Optimization ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Optimization Design ◽  
Large Scale ◽  
Wind Turbine Blade ◽  
Mathematical Simulations ◽  
Blade Tip ◽  
And Performance ◽  
Large Wind

This paper presents a structural optimization design of the realistic large scale wind turbine blade. The mathematical simulations have been compared with experimental data found in the literature. All complicated loads were applied on the blade when it was working, which impacts directly on mixed vibration of the wind rotor, tower, and other components, and this vibration can dramatically affect the service life and performance of wind turbine. The optimized mathematical model of the blade was established in the interaction between aerodynamic and structural conditions. The modal results show that the first six modes are flapwise dominant. Meanwhile, the mechanism relationship was investigated between the blade tip deformation and the load distribution. Finally, resonance cannot occur in the optimized blade, as compared to the natural frequency of the blade. It verified that the optimized model is more appropriate to describe the structure. Additionally, it provided a reference for the structural design of a large wind turbine blade.

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