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透平机械叶片的遗传优化设计
引用本文:樊会元,王尚锦,席光.透平机械叶片的遗传优化设计[J].航空学报,1999,20(1):47-51.
作者姓名:樊会元  王尚锦  席光
作者单位:西安交通大学能源与动力工程学院赛尔机泵研究中心
摘    要: 提出一个基于遗传优化理论的透平机械叶片设计方法。该方法以叶片形状作为优化对象,利用遗传算法通过使其表面边界层中流动损失的极小化来搜索最佳的叶片形状。叶片形状被参数化表示。已知叶片形状的流场分析由一个叶栅正命题CFD程序完成。方法应用于一个离心压缩机扩压器叶片设计。数值计算显示,该方法可成功地求得具有最小流动损失的扩压器叶片形状。

关 键 词:遗传算法  透平机械  叶片  设计  扩压器  

OPTIMIZATION OF THE BLADES FOR TURBOMACHINE BY GENETIC ALGORITHM
Fan Huiyuan,Wang Shangjin,Xi Guang.OPTIMIZATION OF THE BLADES FOR TURBOMACHINE BY GENETIC ALGORITHM[J].Acta Aeronautica et Astronautica Sinica,1999,20(1):47-51.
Authors:Fan Huiyuan  Wang Shangjin  Xi Guang
Institution:SER Turbomachinery Research Center, School of Energy and Power Engineering, Xi′an Jiaotong University, Xi′an, 710049
Abstract:Based on the genetic optimization theory, a design method for turbomachine blades is presented. The method, taking the minimal flow loss in a cascade of the candidate blades as its objective, searches for the optimal blade profile by a genetic algorithm process. A population of candidate blades represented in terms of the so called “chromosomes” is operated by genetic algorithm operators so as to evolve iteratively to the minimization of the cascade′s flow loss, and finally to generate an optimal blade profile. For the easy use of the genetic algorithm the blade profiles are parameterized using a blade thickness distribution superimposed on a camber line which is a cubic polynomial modified by four Hicks Henne functions. A CFD solver, developed by the authors based on the boundary element method, is employed in the method to provide the flow field analysis for a given blade profile. The method is verified by a practical case of a centrifugal compressor diffuser blade design. The numerical simulations show that the new approach successfully searched out the diffuser blade that has minimal flow losses.
Keywords:genetic algorithm  turbomachine  blade  design  diffuser
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