| Summary: | 碩士 === 中華大學 === 機械工程學系 === 105 === In recent years with the country's active development of renewable energy and development and research, and wind power is a kind of renewable energy, but also the world is committed to the development of renewable energy. Taiwan's western coastal and outer islands have considerable wind resources, the average annual wind speed of up to 5 ~ 6 m/s above the density of 250 w/m2, showing that China has a wind turbine development of shallow power.
In this study, the structural analysis software ANSYS was used to analyze the structural mechanics behavior of the 660 kW Vestas V47 trilobalic horizontal shaft fan at the wind speed (15 m/s). In the study, Workbench under ANSYS was used to analyze the fluid-structure coupling, that is, the computational fluid dynamics software CFX and ANSYS structural mechanics software were combined with each other. And according to the relationship between different pitch angle, tilt angle and wind speed, different terrain corresponds to the ground roughness coefficient α. In addition to the general external flow field, the portion of the flow field region establishes a circular rotational domain flow field in the blade rotor section, since the setting of the blade portion during the calculation of the fluid analysis is to rotate, The wind speed is based on the wind velocity distribution method of IEC61400-1. The formula is Vinlet = Vhub (Z / Hhub) α, and the response of the blade to the fluid-solid coupling is discussed. The results are analyzed. Part of the speed in the first model has the maximum value, YZ plane under the maximum value will appear in the third model, the rotation field pressure field and YZ plane pressure field maximum is appear in the third model, Structural stress maximum value In addition to the first model is present on the left side of the blade, the other two models are present on the right side of the blade, and the maximum value appears on the first model. This study hopes to study the distribution of the flow field, the distribution of the pressure field and the stress distribution of the structure, and then the noise problem is discussed.
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