Abstract：Conventional blade flutter analysis is normally based on an isolated blade row model, the influence of multi-row aerodynamic coupling on blade flutter characteristics cant be ignored when rotor-stator gaps decrease due to aeroengine compact requirements. A fluidstructure coupled simulation for a 1.5stage HPC was conducted with a selfdeveloped algorithm to analyze the influence of upstream and downstream blade rows on rotor blade flutter characteristics. Aiming at a typical operation condition, rotor blades aeroelastic stability analyses were performed with an isolated rotor model, an IGV-rotor model, a rotorstator one and an IGV-rotorstator one, respectively. The results showed that the shock wave vibration influences the flutter stability significantly; there are reflection and superposition of unsteady pressure waves under the multirow environment, the amplitude and phase of unsteady pressures on the rotor blade surface are changed obviously and furthermore the blade aeroelastic stability is changed; multirow interferences raise the aerodynamic damping of rotor blade, especially, when the upstream and downstream blade rows act simultaneously, the damping value increases by nearly 732.7%.
杨慧 1,李振鹏 1. 多排环境下转子叶片气动弹性稳定性机理分析[J]. 振动与冲击, 2017, 36(1): 146-152.
YANG Hui, LI Zhenpeng. Aeroelastic stability analysis of rotor blade under multi-row environment. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(1): 146-152.
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