Numerical Calculation Method of Spanwise Icing Characteristics and Performance Loss of Three-Dimensional Vertical Axis Wind Turbine Blades

Most icing studies use 2D or quasi-3D models, ignoring the effects of blade span and tip icing. In this paper, a new model for predicting 3D vertical axis wind turbine blades by supplementing is established, characteristics under multiple working conditions are simulated step from time scale, unsteady laws compared analyzed. Ice properties surface temperature distribution determine corresponding deicing power. The analysis results show that unfrozen water film flows in spanwise direction blade, resulting smaller limit on pressure than two-dimensional model, which indicates chordwise anti-icing structure can be set small range. At same time, annular ridge ice formed at end slows down reduction rate lift-drag ratio effectively reducing influence leading edge shape aerodynamic performance blade. Finally, critical melting power density required to reach equilibrium reduced about 11% trailing due increased thermal resistance gas-to-blade matrix interface layer.