以某型航空发动机压气机转子为研究对象,考虑叶盘间动静干涉的影响,对压气机叶盘转子内部的三维流场进行了模拟.通过静频试验引入叶片失谐量,基于Kriging模型完成了耦合界面载荷数据的传递,分析了压气机转子叶片表面非定常气动载荷的分布规律,并讨论了失谐和气动载荷对压气机转子叶盘系统振动特性的影响.结果表明:压气机叶片受到的气动载荷为非定常脉动压力,主导频率为动静干涉频率f0的倍频;在干涉周期T内,压力面和吸力面气动载荷的变化呈相反趋势,且压力面气动载荷的非定常性明显大于吸力面气动载荷的非定常性;失谐和气动载荷的作用加剧了叶盘系统的振动.研究结果为压气机叶盘转子系统的动力学设计提供了理论依据.%Considering the interactions of stator-rotor blade rows,flow characteristics of an aero-en-gine compressor were simulated with the numerical method. Stiffness mistuning was set by the test of static frequency. Load transfer of aerodynamic pressure was achieved from flow field to blade structure based on the interpolation method of Kriging model.Then distribution law of aerodynamic load was ana-lyzed on compressor blades.In addition,the effects of stiffness mistuning and aerodynamic load on vibra-tion characteristics of blade-disk system were discussed.The results show unsteady aerodynamic load on compressor rotor blades fluctuates periodically,and dominant frequencies are mainly at the frequency dou-bling of stator-rotor interaction f0.In the interaction period T,variations of aerodynamic load on pressure and suction surfaces take the contrary trend,unsteady characteristics of aerodynamic load are far greater on pressure surface than that on suction surface.By the effects of mistuning factor and aerodynamic load, the vibrations of blade-disk are enhanced seriously.The research results provide the theoretical basis for dynamics design of compressor blade-disk rotor systems.
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