High-Fidelity Simulation and Performance Analysis of Twin-Spool Turbofan Engine Based on Multi-dynamics Approach

To build a reusable and flexible general simulation platform for turbofan engines, this paper constructs a general turbofan engine simulation platform that utilizes the hierarchical design method oriented to graphical module objects. According to the inertia of the engine rotor and the storage effect of gas mass and energy in volumes, the performance parameters at the typical cross-section of the engine are obtained by solving the first-order differential equations of mass, momentum, and energy, and the component-level nonlinear dynamic mathematical model of the turbofan engine is established. This model is used to simulate the characteristic of a certain type of engine, and the results show that the steady-state error is less than 1.1% by comparing the simulation results with the experimental data. The average calculation time for a single flow path in the multi-dynamic model is 0.512 s and the multi-dynamic model exhibits rapid response speed during transient thrust variations with an adjustment time of less than 3 s. This modeling avoids large-scale iteration when solving nonlinear equations, improves the calculation speed of the full-range turbofan engine simulation program, and provides a viable option for constructing a computational model of a twin-spool turbofan engine that may be used in simulation studies.