| With the rapid development of global economy, energy and environment have become the major problems confronted by the world nowadays. It has reached a consensus for developing renewable energy vigorously. As a green, non-polluting energy, wind energy has attracted the attention of the world and has been received increasing attention. And wind power is the main form of wind energy utilization.The blade is one of the most critical components in the wind power generation system, whose stress state is complex. The reliability of blade is directly related to the safe operation of the entire system, the rotational speed and tip speed ratio is a directly affects the performance of the wind turbine. A certain horizontal axis composite wind turbine blade was used as the main research model, and the paper simulated its fluid solid interaction by CFX on SNSYS Workbench software, and analyzed the changes of the results under different conditions.Firstly, this paper analyzed the modal of the blade, and verified exactness of the modal by comparing with the results of existing paper. The results showed that it had a unique optimal tip speed ratio by contrasting the results under different wind speed. Blades under different thickness were analyzed by fluid structure interaction simulation in condition of the optimal tip speed ratio. At the end, the paper analyzed the blades with different aerofoil parameter and length.The result showed there was little change in the stress and deformation contours of different blades. The stress concentrations of blades appeared at about one-third of the blade length from the blade tip under compressive stress, which can easily lead to fatigue failure. And the deformation of the blade from root to tip emerges in gradient distribution. The increase of the blade length exacerbated the stress concentration and deformation of the blade, and the increase of the aerofoil parameter improved the stress concentration and deformation of the blade to some extent. |
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