FLOW FIELDS AND AERODYNAMIC PERFORMANCE ANALYSIS OF WIND TURBINE UNDER WIND AND RAIN INTERACTION

Zhou Wenping; Tang Xuexin

doi:10.19912/j.0254-0096.tynxb.2020-0712

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 318-323. DOI: 10.19912/j.0254-0096.tynxb.2020-0712

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

FLOW FIELDS AND AERODYNAMIC PERFORMANCE ANALYSIS OF WIND TURBINE UNDER WIND AND RAIN INTERACTION

Zhou Wenping¹, Tang Xuexin²

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Abstract

Raindrops under interaction of wind and rain will change the flow field of air and aerodynamic load of blade, and affect the safety and stability of wind turbine. A 1.5 MW wind turbine is taken as an example, the flow field and raindrop collection efficiency under the interaction of wind and rain are computed based on the Multiple Reference Frame （MRF） and Eulerian Two-Phase theory; and then the accumulation process of raindrops on the surface of blade and the aerodynamic performance of blade are obtained based on Euler wall film model. The results show that the raindrop collection efficiency on the blade surface increases along the blade span under the interaction of wind and rain; raindrops form film on the pressure side firstly, and then expand to the middle area of suction side and the tip area, but it is difficulty to form film near the root area of blade. The change of the surface pressure on blade caused by raindrops is mainly on pressure side, and the ratio of the wind pressure increase value to the wind pressure reaches up to 12.5%. The derived results are helpful to develop more reliable design for wind and rain resistance of the wind turbine, and the safe operation of the wind turbine under wind and rain interaction conditions.

Key words

wind turbines / wind rain interaction / rain film / flow fields / aerodynamical performance

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Zhou Wenping, Tang Xuexin. FLOW FIELDS AND AERODYNAMIC PERFORMANCE ANALYSIS OF WIND TURBINE UNDER WIND AND RAIN INTERACTION[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 318-323 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0712

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