Performance Optimization and Serrated Design of Trailing Edge on Compressor Blade under the Effect of Rotor-stator Interaction
Complex excitation of compressor blade wakes is induced by the effect of rotor-stator interaction.The trailing-edge serrations are used as an effective means for controlling the excitation of blade wakes.Considering the interaction of rotor-stator blades,the serrations at stator trailing edge are designed to improve the wake turbulence of blades and the performance of compressor.Additionally,the experimental design of Latin square is applied to optimize the profile of rotor blades.This method is used to control the wake disturbance of compressor blades and optimize their performance under the effect of rotor-stator interaction.The results indicate that the wake patterns of stator blades are effectively improved by the distribution of non-homogeneous serrations,the mixing effects between blade mainstream and wake regions are enhanced,and the velocity loss at blade trailing edge is reduced.Consequently,the efficiency of transonic compressor is improved by 2.70％,and the stable operating range is increased by 12.31％.The efficiency of compressor is increased to 91.42％by optimizing the profile of rotor blade,and its performance margin is further expanded.This research not only has an important theoretical significance for the wake control,but also has a great engineering significance in the design of high-performance blade-disk system.
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维普
