单轴混排微型涡扇发动机低转速动力学建模

Low Speed Dynamic Model on Singed-Shaft Mixed Exhaust Micro Turbofan Engine

本文描述向心涡轮驱动的单轴混排微型涡扇发动机从起动到慢车的低转速动力学模型及动态仿真,以适应发动机电子控制器研制闭环仿真需求。通过风扇、压气机和涡轮低转速线特性扩展,流道总压损失模型、混合器总压平衡、转子动力学等模型修正,仿真结果表明模型能够涵盖发动机从电机起动、喷油点火、加速慢车的动态过程。

To adapt to closed-loop simulation requirements of electronic control unit research, dynamic mod-eling and simulation from starter to idle on singled-shaft mixed exhaust micro turbofan engine which is driven by centripetal turbine is described. Fan, compressor and turbine characteristics map is extended to low corrected speed, modeling of pressure loss in duct, pressure balance in mixer exhaust, rotor dynamic is updated. The simulation results show that modeling can overlay the dynamic process from starter, ignition and idle.