Development Of The Temperature Field Prediction Method For Wind Turbine Blade And Its Application

With the rapid development of wind turbine energy market in China, wind energy resources have been vigorously exploited. In some certain wind fields, there may exist severe freezing and icing on wind turbine blades, which will greatly affect the efficiency and life of wind turbines. T herefore, the market urgently requires anti-icing wind turbine blades and the development of anti-icing wind turbine blades have become an important field of wind turbine blade research in China.Currently, the development of wind turbine blades is still at the initial stage. Based on the summary of mainstream wind turbine blade technology around the globe, this paper selects the appropriate anti-icing technology for research according t o the actual situation in China and requirements of wind turbine factories. It predicts the temperature field with finite element analysis software and provides theoretical guidance for hot air anti-icing technology. T he main content of the paper is shown as below:Firstly, the paper proposes a temperature field prediction method based on shell elements in ANSYS software. The advantage of this method is that it solves the problem of difficulty to build solid element models and obtain equivalent thermo-physical parameters of composite material. In this way, it explores a new method of heat transfer analysis for complex composite materials with laminar structures such as wind turbine blades and provides reliable theoretical guidance for anti-icing device resea rch.Secondly, a set of hot air anti-icing system has been developed. Then the experimental platform was built with the system and the heating experiments was done. Temperature data was measured.The date was used as load and compar ed with calculate results. It provides reference for the calculation and the accur acy of the calculation results.Thirdly, for a certain type of wind turbine blade, the paper performs temperature field computation of the wind turbine blade with ANSYS according to the experimenta l data. By comparison between computed and experimental results, it verifies the computation accuracy and reliability of this method.Fourthly, based on the above computation, this paper performs a further research on the temperature field of the wind tur bine blade and compiles a software to facilitate the temperature field analysis. The software provides a method to predict the temperature field analysis for deicing of wind turbine blade. It greatly simplifies the computation process and reduces the compu tation cost.Fifthly, By comparing different effects of temperature load on deicing, it adjust s the deicing strategy of the wind turbine blade. In this way, it greatly reduces the energy consumption of the system.In summary, this paper mainly studies the temperature field prediction method of wind turbine blades, it applies shells elements in ANSYS into temperature field analysis of wind turbine blades and successfully develops a specialized software for icing removal of blades. This method helps effecti vely predict the temperature field distribution in various working conditions in a shorter time, it provides a new research method for heat transfer analysis of complex composite structure with laminar structure such as wind turbine blades. Based on the ab ove method, this paper manages to create an anti-icing system and performs a preliminary research on optimization of icing removal control method. Finally, it obtains some meaningful results and provides theoretical guidance and practical experience for fu rther optimization of anti-icing devices.