Performance enhancement of gas heat prevention and deicing of wind turbine blades based on numerical simulation of multi‑heat transfer model
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(1.Jiangxi Ji'an New Energy Co., Ltd., State Power Investment Group, Nanchang 330000, China;2.School of Electrical & Information Engineering, Changsha University of Science & Technology, Changsha 410114, China;3.Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Company(State Key Laboratory of Disaster Prevention and Mitigation for power transmission and transformation Equipment),Changsha 410100, China)

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TM315

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    Abstract:

    Ice formation on wind turbine blades poses dual challenges to the operational safety and power generation efficiency of wind farms, making it urgent to de-ice wind turbines with severe icing. Air thermal deicing is an active anti-icing technology for blades, where hot air transfers heat from the inner surface to the outer surface of the blade through a combination of conduction and convection, melting the overlying ice layer. From the perspective of the heat transfer process alone, the processes of convective and conductive heat transfer in air thermal deicing are not particularly complex and can be studied through two methods: systematic experimentation and numerical simulation, to investigate their flow and heat transfer characteristics. However, the conditions required for experimentation are quite demanding, and the experimental costs are relatively high. To address this issue, a coupled flow and heat transfer model for both the inner and outer sides of the turbine blade is established based on technologies such as the k-ε turbulence model, velocity-pressure coupling algorithm, and wall function. This model analyzes the effectiveness of air thermal deicing under the combined effects of conduction and convection, avoiding the separated defects of traditional numerical models that only consider unilateral flow and heat transfer. It can accurately obtain the velocity field, temperature field, pressure field inside the blade cavity, as well as the temperature distribution on the outer wall of the blade under specific operating conditions, providing technical guidance for the design and operational control of a reasonable deicing system. The research results indicate that under different air supply velocities, the temperature distribution on the blade surface shows a trend of being higher at both ends and lower in the middle, and as the air velocity increases, the temperature imbalance phenomenon is significantly improved. When the air supply velocity is less than 15 m/s, the surface temperature of most areas of the blade is below 0 ℃, but when the air supply velocity increases to 20 m/s, the area with a surface temperature below 0 ℃ is significantly reduced.

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刘忠德,周 强,雷和林,邬伟骏,吴江波,李 杰,范必双,李 波.基于多传热模型数值仿真的风电机组叶片气热防除冰性能强化[J].电力科学与技术学报英文版,2024,39(4):160-168. LIU Zhongde, ZHOU Qiang, LEI Helin, WU Weijun, WU Jiangbo, LI Jie, FAN Bishuang, LI Bo. Performance enhancement of gas heat prevention and deicing of wind turbine blades based on numerical simulation of multi‑heat transfer model[J]. Journal of Electric Power Science and Technology,2024,39(4):160-168.

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  • Online: September 10,2024
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