Aero-engine Performance Evaluation Based on Gas Path Parameters and Operating Characteristics

Aero-engine performance evaluation plays an important role in the operation and maintenance management of aviation engines, and it is the basis for formulating aero-engine operation and maintenance plans. To improve the accuracy of aero-engine performance evaluation, we propose to use the principal component analysis evaluation method to study the performance evaluation of the whole aero-engine and the module by combining the operating characteristics of the module, the original value, and the deviation value of the gas path parameters. By decoupling the original value and deviation value of high-dimensional gas path parameters, the direction with the largest performance difference if the module is selected as the principal component. Combined with the operating characteristics of modules to quantify the principal component evaluation indexes, the performance is comprehensively evaluated by using the regression model. To demonstrate the effectiveness of the method, we performed method validation using actual monitoring data from a CFM56-5B engine. The experimental results show that the method can accurately assess the whole engine and module block performance variation of the aero-engine.