变循环发动机模态转换数值模拟

对双外涵变循环发动机的模态转换过程进行了研究,设计了变循环发动机模态转换方案,确立了模态转换时的多部件调节规律,采用稳态模型对模态转换进行了数值模拟.结果表明,所设计的模态转换方案可行,能够使变循环发动机的涵道比发生明显改变,并有效提高了发动机在部分推力时的空气流量,与设计参数相同的常规涡扇发动机相比,其安装耗油率明显降低. 

Numerical simulation on bypass transition of variable cycle engines

Based on a double bypass variable cycle engines,a bypass transition process was given.Using multi-components control method,the performance of variable cycle engine mode transition was numerical simulated by a steady state model.Compared with general turbofan engine,the variable cycle engines could change obviously the bypass ratio,and the SFC(specific fuel consumption) is depressed on subsonic cruise condition.