Wind Turbine Blade Design And Its Capability Research

Wind turbine blade is one of the most important components. We designed a good wind turbine blade is base of higher coefficient and greater economic benefit. In this paper, we use Wilson method to design 100W horizontal axis wind turbine blade. After processing, we analyzed the aerodynamic performance and vibration performance. The study found that low-speed wind turbine design at the basic design of wind energy utilization factor can be achieved. And makes wind turbine in operation at its speed to avoid resonance, prolonging the life of the wind round, which is designed to reduce the cost.When design calculations, we found the chord changed was non-linear relation. Because we didn't consider constraints among each section, the design leaves was serious distortion and the possessing was very difficult. We should modify it, but that will bring performance error. My principle is made the leaf blade performance of chord change to the linear trend of under the premise. According to the formula f = ( 2π)? 1K0.5×m?0.5, we can see that the natural frequency of blade is relatively low, and it is easily arouse resonance under the work rotate speed. Therefore, we should distribute the quality of blade newly. I made two improvements in the design: 1. because a band brandished vibration was reason to bring the roots was failing, and a majority of quality of the wind turbine concentrated in the blade root, and the root was designed into disk-shaped, thus wind turbine would achieve the stiffness under lesser quality of the roots. It could change aerodynamic characteristics of blades. 2. We should reduce the size of the blade in the range of the national standard, the vibration performance will be advanced, but its aerodynamic characteristics will be reduced. After processing we will do the aerodynamic performance and vibration test.This paper performs experimental modal analysis in single-blade and 3-blades wind turbine. The results show: single-blade mainly waved in vibration, torsion vibration was not very noticeable. the 3-blades wind turbine has the stage with a symmetric (ant symmetric), the second symmetric (ant symmetric) vibration mode, and ant symmetric vibration mode's frequency relatively low, at the time we find the vibration mode and frequency have much different between single-blade and 3-blades wind turbine, so the single-blade didn't replaced with 3-blades wind turbine of dynamic characteristics of the structure. Then we test aerodynamic performance in the wind-tunnel. After testing we found its performance was very close to the design results. This shows the design of the blade is basically reasonable.