Dynamic Loads and Wake Prediction for Large Wind Turbines Based on Free Wake Method 被引量：1

Dynamic Loads and Wake Prediction for Large Wind Turbines Based on Free Wake Method

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摘要 With large scale wind turbines,the issue of aerodynamic elastic response is even more significant on dynamic behaviour of the system.Unsteady free vortex wake method is proposed to calculate the shape of wake and aerodynamic load.Considering the effect of aerodynamic load,inertial load and gravity load,the decoupling dynamic equations are established by using finite element method in conjunction of the modal method and equations are solved numerically by Newmark approach.Finally,the numerical simulation of a large scale wind turbine is performed through coupling the free vortex wake modelling with structural modelling.The results show that this coupling model can predict the flexible wind turbine dynamic characteristics effectively and efficiently.Under the influence of the gravitational force,the dynamic response of flapwise direction contributes to the dynamic behavior of edgewise direction under the operational condition of steady wind speed.The difference in dynamic response between the flexible and rigid wind turbines manifests when the aerodynamics/structure coupling effect is of significance in both wind turbine design and performance calculation. With large scale wind turbines,the issue of aerodynamic elastic response is even more significant on dynamic behaviour of the system.Unsteady free vortex wake method is proposed to calculate the shape of wake and aerodynamic load.Considering the effect of aerodynamic load,inertial load and gravity load,the decoupling dynamic equations are established by using finite element method in conjunction of the modal method and equations are solved numerically by Newmark approach.Finally,the numerical simulation of a large scale wind turbine is performed through coupling the free vortex wake modelling with structural modelling.The results show that this coupling model can predict the flexible wind turbine dynamic characteristics effectively and efficiently.Under the influence of the gravitational force,the dynamic response of flapwise direction contributes to the dynamic behavior of edgewise direction under the operational condition of steady wind speed.The difference in dynamic response between the flexible and rigid wind turbines manifests when the aerodynamics/structure coupling effect is of significance in both wind turbine design and performance calculation.

作者曹九发王同光龙慧柯世堂许波峰

机构地区 Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design Department of Mechanical Engineering

出处《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2015年第2期240-249,共10页 南京航空航天大学学报（英文版）

基金 supported by the National Basic Research Program of China (973 Program) (No. 2014CB046200) the Jiangsu Province Natural Science Foundation (No.BK2012390) the Fundamental Research Funds for the Central Universities the Priority Academic Program Development of Jiangsu Higher Education Institutions

关键词 wind turbine free wake method aerodynamic dynamics structural dynamics wind turbine free wake method aerodynamic dynamics structural dynamics

分类号 O35 [理学—流体力学]

作者简介 Corresponding author： Wang Tongguang, Professor, E-mail： tgwang@nuaa. edu. cn.

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