基于气动相似的浮式风力机模型叶片快速设计方法

Rapid design method of floating offshore wind turbine model blade based on aerodynamic similarity

在浮式风力机模型试验中,由于尺度效应的影响,浮式风力机模型叶片的推力不能达到弗汝德相似条件下的目标推力值,采用重新设计叶片的方式可以较好地满足模型试验的要求。文章以某6 MW海上浮式风力机模型试验为例,提出基于气动相似的模型叶片快速优化设计方法,并与前人提出的方法对比。计算结果表明:在额定工况下,文章提出的方法可有效降低78.18%的风力机推力计算次数,从而提高计算速度;在试验工况下,该方法设计的叶片与目标值的匹配情况优于模矢搜索法。研究结果可以为风力机模型叶片优化设计提供参考。

In the model test of floating offshore wind turbines,due to the influence of the scaling effect,the thrust of model wind turbines cannot reach the target value under the similar condition of Froude.The method of redesigning model blades can satisfy the requirements of the model test.Du from Shanghai Jiaotong University presented model blade optimization design method based on the pattern search method,which needed much time.Taking a model test of a 6MW floating offshore wind turbine as an example,this paper presents rapid design method of model blades based on the aerodynamic similarity.This method simplifies the optimization parameters from eight to single.The calculation results show that under the requirement of the model test,the method proposed in this paper can effectively reduce the calculation times by 78.18%,which improve the calculation speed obviously.And then,under the other working conditions of the test,the matching between target value and the thrust of model blade based on the this method is better than the model blade based on the pattern search method.This paper provides a reference for the optimization design of model blades.