On the basis of thermodynamics

gas dynamics and gas turbine principles

a detailed research on how to model the transient performance of a geared turbofan engine was performed

and the relevant solver equations were deduced simultaneously by employing constant mass flow (CMF) method in the paper.A geared turbofan engine transient model was successfully coded by means of employing the solver equations and C++ programming language.On the comparable basis

the calculation results have quite remarkable consistency with those results calculated by Gasturb 10

a famous commercial software in aero-engine performance simulation

with maximum errors within 1.5%.Hence

these consequences show the correctness and applicability of the solver equations.