The Analysis Of10KW Wind Turbine Entire Machine Based On Fluid-solid Coupling

Energy is the lifeblood of the national economy in modern society, and it is the majorguarantee of promoting social development and improving people’s living standard. With therapid development of global economy, the consumption of limited resources such as oil hasincreased dramatically. Countries all over the world begin to attach importance to thedevelopment and utilization of clean energy, such as solar energy, hydropower, and windpower. Wind power with its advantages of being clean and efficient has entered a rapiddevelopment stage. Wind turbine is the device which obtains electrical energy from theconversion of the natural wind energy to mechanical energy. Studies in the field of windpower focus on MW wind turbine, and kW wind turbine is greatly demanded in the practicalapplication, therefore, it is necessary to conduct the thorough research on the kW windturbine.Based on10kW wind generator’s operating mode, this research investigates thestructure design, parameter determination, the flow field characteristics of the entire machineand structural characteristics of this wind turbine type deeply. This thesis mainly finished thefollowing work:It was determined to choose the model of10kW direct driving type horizontal axis windturbine. Through studying its basic structure and combining with the relevant designtechnology and theoretical foundation of wind turbine, this study set the main parameters anddetermined the final wind turbine structure and technical route.With the aid of Fluid Flow (CFX) module on Ansys Workbench platform, this papercarried out numerical simulation for Flow field characteristics of wind turbine entire machine.This research put forward the whole flow field numerical simulation under two differentsituations of considering the cabin tower and not considering the cabin tower. Afterwards, theimpact conducted from wind turbine nacelle and tower in the work was concluded. The windpressure distribution on the surface of the wind turbine machine was studied, which canprovide guidance for the subsequent structure stress and strain analysis.The statics analysis on the wind turbine entire machine was carried out in Staic Structuralmodule of Ansys Workbench. This research investigated the structural stress distribution andthe deformation. Moreover, it brought forward numerical calculation of a single blade stress.On the basis of statics analysis, the prestressed modal analysis on the blade of wind turbineand entire machine were accomplished. In Transient Structural module, this paper carried outthe Transient dynamic analysis and studied the mutual influence between the wind turbineflow field and structure change.