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考虑了变循环发动机转子惯性效应和部件容积效应,分析了模态选择阀门面积、核心驱动风扇级导叶角度、低压涡轮导向器面积、喷管喉部面积等几何参数及其不同组合调节方式对变循环发动机模态转换过程的影响,并与实验数据进行了对比.结果表明:所建立的数学模型能正确反映变循环发动机在模态转换过程中参数的变化规律.为确保转换过程的顺利进行,在放大(关小)模态选择阀门面积时,应关小(放大)核心驱动风扇级导叶角度.低压涡轮导向器面积和喷管喉部面积的调节可使得转换过程中参数的变化更加平稳.
Considering the rotor inertia effect and component volume effect of variable cycle engine, geometric parameters such as mode selection valve area, core drive fan guide vane angle, low pressure turbine guide area and nozzle laryngeal area were analyzed. The results show that the mathematical model established can correctly reflect the changing law of the parameters of the variable cycle engine in the process of modal conversion.In order to ensure the smooth progress of the conversion process, (Magnification) of the core-driven fan-stage vane angle while the valve area is being enlarged (off) Moderate adjustments of the low-pressure turbine director area and the throat area of the nozzle will allow more variation in the parameters during the shift smooth.