基于均匀设计和遗传算法的离心压缩机叶片优化设计

将均匀设计、CFD技术、回归分析方法与遗传算法相结合,发展了一种离心压缩机叶片优化设计方法.均匀设计用来生成试验样本点几何信息,各样本点性能评估分析则借助CFD技术完成,回归分析方法用于对样本点的信息进行函数逼近,最后由遗传算法对回归分析得到的逼近函数进行全局寻优.以极大化等熵效率为目标函数,将该优化方法应用于某离心压缩机叶片优化设计.结果表明:与初始叶轮相比,优化后叶轮的等熵效率有了一定的提高,说明该优化方法是有效的.

Optimization Design of Centrifugal Compressor Blades, Based on the Uniform Design Method and Genetic Algorithm

An approach to optimization design,of centrifugal compressor blades,which incorporates the uniform design method,CFD analysis technique,regression analysis method and genetic algorithm,is being presented.Uniform design is used to generate geometric information of trial samples,the performance of which are evaluated and analyzed by CFD technique.Function approximation of sample information is performed by the regression analysis method.Finally global optimization of the approximative functions is obtained by applying genetic algorithm.Taking maximal isentropic efficiency as the object function,this optimization method has been applied to the optimal design of a certain centrifugal compressor blade.Results show that the isentropic efficiency of the bladed wheel got improved,as compared with that of the original,which vindicates the effectiveness of the proposed optimization approach.