The over-under turbine based combined cycle (TBCC) propulsion system dynamic model is established, including the engine model and inlet model. A dual-channel inlet is designed to match the engine and the inlet performance parameters are obtained by computational fluid dynamics (CFD) calculation, which provides original data for the integrated Inlet/Engine matching model. Control plan is designed to ensure that the engine is not over-temperature, over-rotation or surging based on correlation analysis. The simulation results show that the designed control plan can keep the TBCC propulsion system continuous in thrust during the mode transition, and the thrust fluctuation is about 10%.

中文翻译：

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基于进气/发动机匹配的涡轮透支联合循环推进系统建模与模式转换仿真

建立了基于超底涡轮的联合循环（TBCC）推进系统动力学模型，包括发动机模型和进气模型。设计了双通道进气口以匹配发动机，并且进气口性能参数是通过计算流体力学（CFD）计算获得的，该功能为集成的进气口/发动机匹配模型提供了原始数据。控制计划旨在根据相关分析确保发动机不会过热，过度旋转或喘振。仿真结果表明，所设计的控制方案能够使TBCC推进系统在模式转换过程中保持推力连续，推力波动约为10％。