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使用容积动态与转子动态来计算容积与转子的状态量,为压气机及涡轮的特性图插值与计算过程提供输入数据,使得变循环发动机数值仿真的运算过程无需猜值与迭代;并给出了对变循环发动机的可调几何的仿真方法。使用此模型仿真了从双外涵模式向单外涵模式切换的过程以及这两种模式下变循环发动机的高度、速度、节流特性。在高度0km且马赫数为0的大气环境下模式转换的仿真结果显示,变循环发动机涵道比由0.700下降到0.307,单外涵模式与双外涵模式相比推力提高了16.823%,单位燃油消耗率增加了15.163%。
Volume and rotor dynamics are used to calculate the volume of state and rotor state, and to provide input data for the interpolation and calculation of the characteristic map of the compressor and turbine, so that the operation of numerical simulation of variable cycle engine does not need to guess and iterate. Variable geometry simulation of variable cycle engine. The model was used to simulate the process of switching from double-extrinsic mode to single-extender mode and the height, velocity and throttling characteristics of variable-cycle engine in these two modes. Simulation results of the mode transition under atmospheric conditions with a height of 0 km and a Mach number of 0 show that the bypass ratio of the variable cycle engine decreases from 0.700 to 0.307 and that of the single external control mode increases by 16.823% compared with that of the double external control mode. The unit fuel Consumption rate increased by 15.163%.