| Abstract:To accurately evaluate the performance of high-pressure compressors under different inlet total temperatures under whole
engine state and to meet more accurate engine performance matching and analysis requirements, finite element calculations were carried
out on the impact of the variation of the inlet total temperatures T 1 of a twin-spool engine on the performance of the high-pressure compres?
sor. Based on the finite element calculation results, the deformation ratio of each part of the rotors in the component state and the whole
engine state were evaluated and analyzed, and the hot state tip clearance calculation was completed. Based on the tip clearance results of
the compressor component test, the accuracy of the finite element calculations was evaluated and a deformation model of the compressor
rotor in the whole engine state that meets the engineering accuracy requirement was constructed. Multiple linear regression analysis method
was used to establish correlations between the deformation and the compressor performance parameters, to determine the relationship
between the engine inlet total temperature and the compressor rotor deformation. Based on compressor test results under different tip clear?
ance conditions, the influence law of rotor hot state tip clearance on compressor performance was analyzed, and the performance correction
model of the high-pressure compressor under the whole engine state was constructed. Finally, the variation laws of the aerodynamic
parameters and the corrected high-pressure compressor performance under different inlet total temperatures were obtained. The results
show that with the increase of T 1 , the hot state tip clearance of the compressor decreases, and the flow rate, pressure ratio, maximum
efficiency, and surge margin increase approximately linearly. |
