Research on the Integrated Modeling Method of Inlet and Engine Based on Component Level Model

To study the operating mechanism of the integrated propulsion system under the full flight envelopment, a novel type of inlet component-level model is established. Both internal and external flow characteristics are considered in the model. Then, the coupling principle between the inlet and engine is researched and analyzed. Based on the component-level model, a new Feasible-One-Pass Newton algorithm is proposed to solve the co-working equations between the inlet and engine. The low-speed mode, inlet maneuver operation, and engine maneuver operation are considered in the simulation design. Numerical simulations of the integrated model indicated that the model built in this paper could perfectly simulate the co-working principle between the inlet and engine. Moreover, the model could simulate the dynamic and quasi-steady-state equilibrium of the air mass flow between inlet and engine, whether in low-speed mode or under supersonic cruise state.