齿轮传动对转桨扇发动机总体性能建模

Performance Modelling of Geared Contra-Rotating Propfan Engine

为了开展齿轮传动对转桨扇发动机总体性能计算,在双轴涡桨发动机性能模型基础上完善了减速器与对转桨扇性能计算模型,通过构建求解方程组完成了齿轮传动桨扇发动机总体性能建模。计算表明,本模型设计点性能计算结果与公开文献计算结果误差不高于0.1%。本模型可在控制规律设计中选择桨距角为被控参数,且桨距角的调节对对应桨性能及转速影响最大;选定燃气发生器某一参数作为被控参数,再从前后桨桨距角、转速及自由涡轮转速中选取两个被控参数,组合形成的10种三变量组合控制规律均能在本模型中完成计算。结果表明,本模型可支持开展桨扇发动机控制规律设计与性能计算,具有良好的适用性与收敛性。

In order to research on performance of geared contra-rotating propfan engine,the model of gearbox and propfan were supplemented to the performance model of two spool turboprop,then the performance model of propfan engine were built by the introduction of new solver equation set. Through calculating,the performance parameters calculated at design point are similar with the calculation results of reference paper with the relative error no more than 0.1%. The current model can make it available that choosing pitch angles as controlled parameters of control schedule and the change of pitch angle has the biggest influence on performance parameters and rotating speed of corresponding propfan. Once one parameter of gas generator has been chosen as a controlled parameter,then selected two controlled parameters from pitch angles,rotation speeds of propfans,rotation speed of free turbine,10 kinds of triple parameters control schedules combined all could be simulated in the model. It could be concluded that the performance model of propfan engine has good precision and convergence,which could be used to design control schedule and calculate performance of propfan engine.