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Wind turbine blades are subjected to various loads during operation, which can cause deformation, and yaw can make the force situation of the blades more complex. To investigate the dynamic flapping deformation of blades under yaw conditions, experimental research was conducted using digital image correlation (DIC) technology to explore the influence of changes in yaw angle, wind speed, and speed on the dynamic flapping deformation of blades. The results show that the dynamic flapping deformation of horizontal axis wind turbine blades varies in a sinusoidal pattern, and the higher the wind speed, the greater the dynamic flapping deformation. The higher the rotational speed, the greater the dynamic flapping deformation, and at the same time, the time it takes to reach the maximum value is also shorter, with more variation cycles experienced; The existence of yaw angle changes the force situation of the blade. The larger the yaw angle, the greater the trend of dynamic flapping deformation. The shorter the time it takes to reach the peak, the earlier the peak position is. At the same time, the proportion of positive dynamic flapping deformation decreases, and the proportion of negative dynamic flapping deformation increases. The most obvious trend is at a 30° yaw angle. The research results of this article can provide experimental data support for effective control of blade deformation and subsequent research on the impact of blade deformation on the aerodynamic characteristics of wind turbines.
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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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