Wind loads and load-effects of large scale wind turbine tower with different halt positions of blade

Ke, Shitang; Yu, Wei; Wang, Tongguang; Zhao, Lin; Ge, Yaojun

Wind loads and load-effects of large scale wind turbine tower with different halt positions of blade

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Type: Academic journal

Author: Ke, Shitang (Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics and Astronautics) Yu, Wei (Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics and Astronautics) Wang, Tongguang (Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics and Astronautics)

Journal: 테크노프레스 Wind & structures Wind & structures 제23권 제6호 SCOPUS

Published: 2016.1

Pages: 559 - 575 (17page)

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Wind loads and load-effects of large scale wind turbine tower with different halt positions of blade

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In order to investigate the influence of different blade positions on aerodynamic load and wind loads and load-effects of large scale wind turbine tower under the halt state, we take a certain 3 MW large scale horizontal axis three-blade wind turbine as the example for analysis. First of all, numerical simulation was conducted for wind turbine flow field and aerodynamic characteristics under different halt states (8 calculating conditions in total) based on LES (large eddy simulation) method. The influence of different halt states on the average and fluctuating wind pressure coefficients of turbine tower surface, total lift force and resistance coefficient, circular flow and wake flow characteristics was compared and analysed. Then on this basis, the time-domain analysis of wind loads and load-effects was performed for the wind turbine tower structure under different halt states by making use of the finite element method. The main conclusions of this paper are as follows: The halt positions of wind blade could have a big impact on tower circular flow and aerodynamic distribution, in which Condition 5 is the most unfavourable while Condition 1 is the most beneficial condition. The wind loads and load-effects of disturbed region of tower is obviously affected by different halt positions of wind blades, especially the large fluctuating displacement mean square deviation at both windward and leeward sides, among which the maximum response occurs in $350^{\circ}$ to the tower top under Condition 8; the maximum bending moment of tower bottom occurs in $330^{\circ}$ under Condition 2. The extreme displacement of blade top all exceeds 2.5 m under Condition 5, and the maximum value of windward displacement response for the tip of Blade 3 under Condition 8 could reach 3.35 m. All these results indicate that the influence of halt positions of different blades should be taken into consideration carefully when making wind-resistance design for large scale wind turbine tower.

#wind turbine tower #blade position #large eddy simulation #aerodynamic load #wind-induced response

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Ke, Shitang

Affiliation College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics

Fields Engineering > Electrical and Electronic Engineering > Electrical Engineering Engineering > Architectural Engineering > Civil Engineering

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Yu, Wei

Affiliation Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics

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Wang, Tongguang

Affiliation Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics

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Zhao, Lin

Affiliation State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University

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Ge, Yaojun

Affiliation State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University

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