Simulation Research on Heat Transfer Characteristics of the Inner Cavity of Blade Air-Heat Deicing Under Wind Turbine Rotation Conditions

Based on the wall structure of wind turbine blades and the characteristics of the external flow field, combined with the analysis of the surface energy exchange process of wind turbine blades under anti-icing conditions, a zonal equivalent heat conduction model for rotating wind turbine blades is established. Using this model, the surface temperature rise characteristics and fluid field of wind turbine blades under air-heat deicing conditions are simulated and analyzed. The results show that the air-heat system can significantly heat the blade surface, mainly manifested at the interface between the upper and lower shells, the hot air inlet near the wind deflector, and the beam bracket area corresponding to the web channel. Meanwhile, the simulation results indicate that the pressure loss between the hot air inlet and outlet is approximately 1049 Pa. It is evident that reducing the pressure loss of the air circulation path in the blade inner cavity is also a key goal in the design and subsequent optimization of the hot air circulation path for the air-heat system.