*The results of* *previous* *studies* *have proved that manufacture variations can cause a noticeable influence on the compressor aerodynamic performance. The main objective of this paper is to investigate the influence rules and mechanisms of manufacture variations on supersonic/transonic blades aerodynamic performance. The variations used in this study were measured from some newly manufactured high-pressure compressors.*

*In the* *present study，several blade sections with different design Mach number conditions are selected for further statistical analysis of measured deviation data, therefore some systematic errors in the deviation data have been revealed. Based on these data, the computational fluid dynamics (CFD) method has been used to obtain the aerodynamic performances of a large number of the measured blade elements. And then, the analysis of the influence rules of manufacture variations on blade aerodynamic performance in different Mach number conditions has been carried out.* *The present results indicate that the effects of manufacture variations on blade aerodynamic performance in the lower Mach number (0.8) condition are much more significant comparing to that in the higher Mach number (0.9\~1.2) conditions.*

*According to the statistical results of actual manufacture deviations, some particular geometric deviation modes are extracted and superimposed on multiple positions alone the blade surface to analysis the blade geometric sensitivity.* *Based on the blade geometric sensitivity analysis, the distributions of the geometric sensitivity parameter alone the blade surface* *of* *supersonic/transonic blades are exhibited, showing that the blade suction surface upstream of blade suction peak location is also sensitive to manufacture variations besides the blade leading edge. The distributions of the geometric sensitivity parameter for the same blade in different Mach number conditions are* *different, particularly for the supersonic and subsonic conditions. It's worth mentioning that the sensitivity of supersonic blades performance to* *geometric* *variations around the blade leading edge is much lower than the sensitivity of subsonic blades.*

*The approach to analyzing the influence mechanisms is superimposing characteristic geometric deviation modes such as uniform deviation mode and blade leading edge deviation mode. By comparing the influence mechanisms of manufacture variations on subsonic, supersonic and transonic blades on blade aerodynamic performance, the phenomena mentioned above are explained in detail.*


Influence Mechanisms of Manufacture Variations on Supersonic/Transonic Blade Aerodynamic Performances

Division / Sponsor:
International Gas Turbine Institute (IGTI)

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2020/volume/84058

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