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为了研究1+1/2对转涡轮对双轴混排涡扇发动机整机特性的影响,通过对1+1/2对转涡轮特点的分析,提出了1+1/2对转涡轮的特性描述和在整机特性计算中使用方法,并将该1+1/2对转涡轮特性用于双轴混排涡扇发动机性能计算程序中,计算获得了对转涡扇发动机的节流特性,并通过与使用传统涡轮的发动机特性进行对比,获得了1+1/2对转涡轮对发动机整机匹配机理的影响。结果表明:计算获得的对转涡扇发动机性能与实验数据对比,计算精度满足工程应用要求;该对转涡扇发动机在设计点附近工作良好,但在核心机节流至70%设计转速时,对转涡轮引起整机性能发生明显恶化。
In order to study the influence of 1 + 1/2 counter-rotating turbomachines on the characteristics of a twin-turbofan turbofan engine, the characteristics of the 1 + 1/2 counter-rotating turbomachine Describes and uses the method in the whole machine characteristic calculation, and uses the 1 + 1/2 counter-rotating turbine characteristic in the biaxial mixed-row turbofan engine performance calculation program to obtain the throttling performance of the revolving turbofan engine, Through the comparison with the engine characteristics of traditional turbines, the influence of the 1 + 1/2 counter-rotating turbine on the engine matching mechanism was obtained. The results show that the calculated performance of the turbofan engine is in good agreement with the experimental data and the calculation accuracy meets the engineering application requirements. The turbofan engine works well at the design point, but when the core machine is throttled to 70% of design speed, Turn the turbo cause significant deterioration of machine performance.