Research On The Blade Parameterization And Optimization Design

During the research about parametric analysis and optimization design of compressor blades,three mainly works have been done in this paper.The first is to work on the parameterization of 2-D and 3-D compressor blades by using Bezier curve and least-square theory.Firstly,the research about parameterization of blades with Bezier curve.And a smooth process is carried out to eliminate the projections at leading and trailing edges in the process of parameterization.The parametric method is proved in dieefrent parameterization examples by analyzing the error of original and parametric curve.The second aspect is to contribute a optimization system according to the complex characteristics.In the optimization process of compressor baldes,a method building sample database is put forward based on the parameterization of blades.An objective function is created in order to determine the performance of the blade.In the last aspect,parameterization and optimization of a rotor in a transonic axial-flow compressor is put forward in the optimization system builded in thesecond aspect.The three-dimensional flow simulation emulation of the optimal blade sample is carried on,and compared with the flow field with the original sample.Optimization theory is verified by contrasting aerodynamic performance of the optimal blade sample with the original blade.