| Power supply shortage and air pollution problems brought by the fossil fuels force us to require more on how to use the renewable energy and how to elevate the efficiency.Wind power generation, as one of the renewable energy, has been gradually accepted and developed by the wind resource-rich regions globally.Wind power generation transform wind energy into electricity by wind turbines, working environment of wind turbines is relatively unstable, usually accompanied by airflow fluctuations. In addition, the impeller is in the state of rotary motion. Therefore, the real-time state of atmospheric boundary layer and aerodynamic performance of blade as the input of energy response is directly related to wind turbine power generation efficiency and operating lifetime. In this paper, these two aspects is carried out on the research.To achieve the accurate simulation of atmospheric boundary layer(ABL) in wind tunnel, the passive ABL simulation considering the consistency of geometric scale factor for multiple parameters was performed. Several different configurations of the passive devices were carried out in this experiment. The mean wind speed, turbulence intensity, turbulence integral length scale and power spectrum along height for each configuration were measured, which were essential to study the terrain simulation considering the consistency of scale factor between roughness length and height of ABL. Besides, the independent effects of spires and cubes to the simulated flow field were analyzed.It is performed that setting up a test platform to study the dynamic characteristics of wind turbine blade. By the analysis of the strain gauge and the dynamic testing system it is con collect the blade dynamic response under different wind speed, the wind effects on stress and strain distribution on blade. Meanwhile, it is done that testing the chord length and installation angle of several typical sections. Using the airfoil design software, 3D graphics software, finite element analysis software, achieves the 3D modeling and vibration modal analysis of the blade. Finite element analysis has calculated the blade natural frequency and vibration mode, which goes to avoid critical rotational speed of fan, improve the security and provide the experimental vibration analysis a reference. Analysis of stress and strain response frequency vibration signal extracted multiple characteristics, compared with the simulation mode analysis, the result was verified by the experimental scheme is feasible. |
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