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Outline
For large floating wind turbines, the influence of blade deformation on wind turbine performance cannot be ignored. Based on the free wake model of lift line and the geometrically accurate beam model, the effects of aerodynamic coupling effects on the load characteristics of EI-15 MW wind turbine under rolling conditions are studied in this paper. The results show that the additional velocity brought by the rolling motion of the floating platform will change the inflow characteristics at the section of the airfoil, so that the wind turbine load will fluctuate, and the wind turbine load will decrease after considering the flexible deformation of the blade. Compared with the fixed condition, the asymmetry of the load distribution on the rotor plane is more obvious in the rolling condition, which leads to the fluctuation amplitude of the yaw and pitching moment of the rotor. In addition, the shape variable of the blade will fluctuate periodically under rolling conditions, and the shape variable gradually increases from blade root to blade tip. The effective Angle of attack decreases due to torsional deformation, and the Angle of attack of the flexible blade at the same profile section is smaller than that of the rigid blade, which is the direct reason why the load of the flexible blade is lower than that of the rigid blade.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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