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<p>Wind turbine blades in cold regions are susceptible to icing due to meteorological conditions, significantly affecting the turbine’s energy capture efficiency and operational safety. Precise calculation of droplet collection efficiency (DCE) is essential for accurate icing prediction. This study examines existing methods for calculating DCE and identifies limitations during glaze ice formation. An enhanced method based on the Euler Wall Film (EWF) model is introduced to address these limitations, incorporating splashing and rebound phenomena during glaze ice formation on wind turbine blades. The method’s reliability is validated using data from the classic symmetric airfoil, NACA0012. Through the control variable method, this research examines DCE variations under different incoming velocities, medium volume droplet diameters (MVDs), and temperatures. The study also analyzes the distinctions between the improved method and the existing Eulerian method. Results indicate that both impact range and maximum DCE increase with higher incoming velocity and MVD, while temperature exhibits minimal influence on DCE. Variations between the calculation methods reveal differences in water droplet splashing intensity, primarily influenced by droplet kinetic energy and liquid film thickness. The splashing phenomenon gradually decreases as incoming velocity and MVD increase.</p>

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Droplet Collection Efficiency Analysis in the Event of Wind Turbine Blades Glaze Ice Formation Based on Euler Wall Film Model

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Dao-lei Wu,
  • Xu Bai,
  • Yue Du

摘要

Wind turbine blades in cold regions are susceptible to icing due to meteorological conditions, significantly affecting the turbine’s energy capture efficiency and operational safety. Precise calculation of droplet collection efficiency (DCE) is essential for accurate icing prediction. This study examines existing methods for calculating DCE and identifies limitations during glaze ice formation. An enhanced method based on the Euler Wall Film (EWF) model is introduced to address these limitations, incorporating splashing and rebound phenomena during glaze ice formation on wind turbine blades. The method’s reliability is validated using data from the classic symmetric airfoil, NACA0012. Through the control variable method, this research examines DCE variations under different incoming velocities, medium volume droplet diameters (MVDs), and temperatures. The study also analyzes the distinctions between the improved method and the existing Eulerian method. Results indicate that both impact range and maximum DCE increase with higher incoming velocity and MVD, while temperature exhibits minimal influence on DCE. Variations between the calculation methods reveal differences in water droplet splashing intensity, primarily influenced by droplet kinetic energy and liquid film thickness. The splashing phenomenon gradually decreases as incoming velocity and MVD increase.