Comprehensive Assessment Method for Aero-Engine Performance and Risk Based on Emergency Operating

Abstract

To improve the response performance of aircraft engines under emergency operating conditions, this article proposes a comprehensive performance and risk assessment method based on the release of limit protection parameters. The method introduces quantitative indicators such as limit exceedance rate and protection metrics with penalty functions to evaluate the increase in operational risk caused by limit relaxation. These risk metrics are integrated with performance improvement metrics into a unified relative performance index. To verify the feasibility of the method, simulation tests are conducted on a 90k-class turbofan engine model using the C-MAPSS platform under the flight condition of 25,000 feet and Mach 0.62. A Particle Swarm Optimization (PSO) algorithm is applied to determine the optimal limit release rate. Results demonstrate that engine acceleration response performance can be significantly enhanced while keeping the increased risk within acceptable bounds. This method provides a quantitative foundation for the design and validation of emergency control strategies for aircraft engines.