Fourth Order Dynamic Model for a Single Spool Turbofan Engine

This paper presents a novel approach for simulatingtransient behavior of a single spool Turbofan engine usingInter-Component Volume (ICV) method. The method isrelies on the saved mass for the compressor and turbine tosimulate their transient behavior. In this method, byconsidering the pressure and temperature fluctuations,caused by saved mass, a more precise model is obtained. Inparticular, given the thermodynamic conditions of air andengine characteristics, the fluctuation in airplane’s velocity,due to the change in the fuel flow rate, is predicted bysimulating the governing engine dynamic equations. In theproposed dynamic model, airplane velocity as an effectivevariable on the engine’s inlet mass flow rate, is consideredthat makes the results more precise. The proposed methodcan be utilized to enhance the control performance byproviding more accurate model of the dynamics.