Performance Degradation Evaluation of Low Bypass Ratio Turbofan Engine Based on Flight Data

A low bypass ratio turbofan engine operates in a hostile environment, resulting performance degradation. This seriously affects the security and reliability of engine. Therefore, degradation evaluation method for engines based on flight data is proposed. The expands equation system to solve underdetermined problem caused by lack sensors multiple operating point analysis. improved evolution algorithm employed system, which relieves insufficient precision. dataset established calculation model verify method. results show that applicable dataset. Finally, applied actual study law researched engine, indicates engine’s fan efficiency high-pressure compressor flow capacity have an apparent downward trend over time.