Dynamical Analysis and Control of Jet Engine Systems

In the recent years, the main obstacles for raising the operating efficiency are instabilities of the compressor system. The related dynamics and control schemes then cause lots of interests among engineers and researchers. Two main phenomena, which cause the instabilities, are the “surge” and the “stall” behaviors of the compressed gas. The so-called “surge” is characterized as a one-dimensional mass wave motion while “stall” is wave-like disturbance propagating along the circumferential direction with a constant rotating speed. These two kinds of instabilities usually raise the temperature in the compressor abruptly and even cause mechanical damage drastically. In this project, we not only continue our previous study on the single stage compressor, but also extend the research work to the preliminary study of modeling and dynamical analysis of both multi-stage compressors and the whole jet engine system.