Empirical assessment of thermodynamic processes of a turbojet engine in the process values field using vibration parameters

The possibilities of the vibration accelerations signals parameters application for the assessment of thermodynamic processes in the turbojet engine of the F-16 airplane given in its real work conditions have been presented in the paper. The aim is early detection of negative changes in the mixture formation and combustion processes taking place at the aircraft turbojet engine to maintain the high overall efficiency and safety of aviation tasks. Diagnostics of combustion and injection processes have been conducted for stationary engine investigations in the way to obtain quantity measures (dimensional and non-dimensional) and characteristics for these phenomena in the process value domain. The quality of the fuel injection and combustion, expressed in engine operation parameters of the best sensitivity, has been linked to the particular vibration impulse and energy representations, giving the important functional relations for building a diagnostic system for turbojet F-16 airplane engines for real operating conditions. The results show the proposed method assures early and accurate diagnostics for engine dynamic characteristics, making possible diagnostic system application. The diagnostic system design for combustion and injection processes monitoring and malfunctions detections has been proposed.