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目前先进的开式转子发动机多采用变桨距、双排共轴对转桨作为推进部件。采用双排桨的气动计算方法,根据单排桨特性图计算对应的双排对转桨特性图,验证对转桨性能计算模型。在双轴涡轮喷气发动机计算模型的基础上,添加动力涡轮、行星差动齿轮和双排对转桨,组成开式转子发动机计算模型。采用该模型研究了开式转子发动机的调节计划,对比了等转速和等叶尖速度调节的不同,以及对开式转子发动机高度速度特性的影响,并使用美国PROOSIS模型对计算结果进行验证。结果表明:开式转子发动机模型计算精度较高,可较准确地研究不同设计参数和调节规律下发动机的总体性能,其中固定桨扇叶尖速度的调节计划在较低飞行速度下具有高推力、低油耗的优点,可以获得较好的全包线性能。
At present, the advanced open-rotor engine mostly adopts variable pitch and double-row coaxial pair rotary paddles as propulsion components. The aerodynamic calculation method of double-row paddles was used to calculate the corresponding double-row paddle characteristics map according to the single-row paddle characteristics map to verify the calculation model of the paddle performance. Based on the calculation model of the twin-shaft turbojet engine, a power turbine, a planetary differential gear and a double-row counter-rotating paddle are added to compose a calculation model of an open-rotor engine. The model was used to study the adjustment plan of the open rotor engine. The difference between equal speed and isosceles speed regulation and the influence on the speed characteristics of the open rotor engine were compared. The calculation results were verified by the PROOSIS model in the United States. The results show that the calculation accuracy of the open rotor engine model is high, and the overall performance of the engine under different design parameters and regulation laws can be studied more accurately. The regulation program of fixed blade tip speed has high thrust at low flight speed, The advantages of low fuel consumption, you can get a better all-envelope performance.