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| Influence of liquid water content on wind turbine blade icing by numerical simulation |
| LI Yan1*, SUN Ce1, JIANG Yu1, YI Xian2, GUO Wenfeng1, WANG Shaolong3, FENG Fang1 |
| 1. Heilongjiang Provincial Key Laboratory of Technology and Equipment for Utilization of Agricultural Renewable Resources in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; 2. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang, Sichuang 621000, China; 3. College of Metallurgy & Energy, North China University of Science and Technology, Tangshan, Hebei 063009, China |
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Abstract In order to research the influence of liquid water content(LWC)on blade icing of wind turbine, a numerical simulation method for blade icing was established. The numerical simulation was based on low speed viscous N-S equation. The trajectory equation of water droplets was established by Lagrangian method. The mass and energy conservation equations of the water droplets impacting on the surface of the blade were solved based on control body theory. Three sections along blade span wise of a 1.5 MW wind turbine were decided to simulate icing. Five kinds of LWC were selected for simulation including 0.2,0.4,0.6,0.8 and 1.0 g/m3 under two ambient temperatures of -10 ℃ and -20 ℃. The medium volume droplet diameter(MVD)was 30 SymbolmA@m. The simulations included icing shape on blade surface, dimensionless icing area and dimensionless maximum stagnation thickness. Furthermore, the flow fields around both the iced blade airfoil and the original one were simulated and analyzed. Accor-ding to the results, the typical icing characteristics of icing shape, icing area and thickness were greatly affected by the difference of LWCs. This study can provide theoretical reference for the research on anti-icing and de-icing of wind turbine blade.
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Received: 09 January 2018
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