A full states performance simulation model for aero engine was established by using the parametric representation based on the backbone characteristics of compressor and turbine. Part loading performance of a turbojet engine at sea level static condition was simulated through the model. Compared with the traditional model

results showed the average errors of the main parameters were no more than 07%

indicating the full states model had the same precision as the traditional model above idle speed. The simulations for windmill state

ground starting and acceleration to maximum power

and deceleration from maximum power to zero were performed respectively by using the full states model. The ability of simulating full states performance of engine was verified. The results are qualitatively consistent with the operative characteristics and physical laws of the engine.