机械科学与技术2018，Vol.37Issue(4)：493-500,8.DOI:10.13433/j.cnki.1003-8728.2018.0401
大尺寸风力机叶片流固耦合特性研究
Study on Fluid-structure Interaction Characteristic for Large Scaled Wind Turbine Blade
廖明夫 1李岩 1王巧艳 1吕品1
作者信息
- 1. 西北工业大学旋转机械与风能装置测控研究所,西安710072
- 折叠
摘要
Abstract
With the increasing of large-scaled wind turbines blade size,its flexibility is also growing up.It will be more prone to lead to larger structural deformation phenomena in the operation,nonlinear aeroelastic response,and different power performance and instability problems.To predict the nonlinear aeroelastic responses of large wind turbine,it makes sense to develop a new fluid-structure interaction model.A new fluid-structure interaction model including a nonlinear beam based on the geometrically exactly beam theory and an unsteady aerodynamic model based on vortex flow wake theory is applied to study Fluid-Structure Interaction characteristics of large size blade.For the effects of the flexible blade,weight-reduction techniques and increased size.Respectively,using the method that reduce the blade stiffness and reduce the quality.The effects of the large deformation and light weight on the coupling response were studied.The results show that the reduction of the stiffness will greatly increase the deformation and load of the blade,but the effect of the quality reduction on the blade deformation and load is not obvious.When the stiffness and quality are reduced at the same time,the deformation of the blade which is outside of the impeller plane will substantial increase,resulting in impeller power decrease.The influence of the size of rotor is also studied.And the results show the increased root stress and larger fluctuate of coupled response.关键词
风力机/流固耦合模型/几何精确梁/自由涡尾迹Key words
wind turbines/nonlinear aeroelastic/geometrically exactly beam/vortex flow wake分类
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廖明夫,李岩,王巧艳,吕品..大尺寸风力机叶片流固耦合特性研究[J].机械科学与技术,2018,37(4):493-500,8.
