The Rapid Computational Model for Power Output of Ice-covered Wind Turbines Based on Airfoil Aerodynamic Parameters.

Ice-covered wind turbine blades can cause the aerodynamic performance of the blades to be reduced thus leading to the loss of output power. This study investigates three icing scenarios, including streamlined ice and horned ice, analyzing the internal flow characteristics and changes in lift coefficient and drag coefficient of iced airfoils. The research demonstrates that icing results in airflow separation over the airfoil, and with increasing wind speed, the degree of separation intensifies. Moreover, horned ice has a more detrimental impact on blade aerodynamic performance, with a drag coefficient increase of at least threefold at a 5% ice severity compared to a clean airfoil. Based on the aerodynamic parameters of iced airfoils, this paper proposes a rapid calculation model for power output of ice-encrusted wind turbines. It establishes a mathematical relationship between the lift coefficient and drag coefficient of characteristic iced airfoils and power output, allowing direct computation of wind turbine power output at various ice severity. This model provides valuable insights for disaster prevention and mitigation in wind farms and generally satisfies engineering application requirements.