高压压气机出口级叶型加工偏差特征及其影响

doi:10.7527/S1000-6893.2020.23796

Abstract

Abstract: A mid-section blade of the high-pressure compressor outlet stage is studied to obtain the distribution characteristics of actual manufacture deviations and to analyze the effect of manufacture deviations on the aerodynamic performance of blades. The fluid mechanism of manufacture deviations on blade performance is also examined. Results show that the actual manufacture deviations have certain systematic deviations, leading to the variations of the average aerodynamic performance of the actual blades from the design value. Blade manufacture deviations have certain nonlinear effects on the blade performance, which is more noticeable on the blade leading edge. This results in a distinct disparity between the aerodynamic performance of the mean airfoil of the manufactured blades and the mean performance of all the manufactured blades. The geometric deviations near the leading edge has a considerable effect on the velocity spike of the suction and the pressure surface; therefore, these deviations have been the main factor causing systematic variations and increasing the uncertainty of the blade aerodynamic performance. According to the fluid mechanism, the inlet geometric angle deviations are the main cause of the systematic variations of the blade aerodynamic performance, and the effect of the body deviations on the positive/negative incidence range and losses can be estimated by uniform deviations.

Key words: manufacture deviations, compressor blades, aerodynamic performance, uncertainty, flow mechanism

CLC Number:

V231.3

LIU Jiaxin, YU Xianjun, MENG Dejun, SHI Wenbin, LIU Baojie. State and effect of manufacture deviations of compressor blade in high-pressure compressor outlet stage[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(2): 423796-423796.

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State and effect of manufacture deviations of compressor blade in high-pressure compressor outlet stage

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