Application of Tandem Cascade to Design of Fan Stator with Supersonic Inflow

查看全文 作　　者：Li Qiushi,Wu Hong,Zhou Sheng School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing 100191,China

出　　处：《Chinese Journal of Aeronautics》索引2010年第23卷第1期,共6页

基　　金：National Natural Science Foundation of China(10577002);Innovation Foundation of BUAA for PhD Graduates 摘　　要：This article proposes a tandem cascade constructed to tackle the thorny problem of designing the high-loaded stator with a supersonic inflow and a large turning angle.The front cascade adopts a supersonic profile to reduce the shock wave intensity turning the flow into subsonic,while the rear cascade adopts a subsonic profile with a large camber offering the flow a large turning angle.It is disclosed that the losses would be minimized if the leading edge of the rear cascade lies close to the pressure side of the front cascade at a distance of 20% pitch in pitch-wise direction without either axial spacing or overlapping in axial direction.The 2D numerical test results show that,with the inflow Mach number of 1.25 and the turning angle of 52°,the total pressure loss coefficient of the tandem cascade reaches 0.106,and the diffusion factor 0.745.Finally,this article has designed and simulated a high-loaded fan stage with the proposed tandem stator,which has the pressure ratio of 3.15 and the efficiency of 86.32% at the rotor tip speed of 495.32m/s. 关键词：超音速流级联串联定子设计风扇应用轴向间距

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Application of Tandem Cascade to Design of Fan Stator with Supersonic Inflow

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