Journal of Propulsion Technology ›› 2015, Vol. 36 ›› Issue (7): 1078-1084.

• Structure, Strength and Reliablity • Previous Articles     Next Articles

Effects of Asymmetric Vane Spacing on Rotor Blade Vibration

  

  1. School of Energy and Power Engineering,Beihang University,Beijing 100191,China,School of Energy and Power Engineering,Beihang University,Beijing 100191,China,College of Engineering,Peking University,Beijing 100871,China,Beijing Power Machinery Institute,Beijing 100074,China and School of Energy and Power Engineering,Beihang University,Beijing 100191,China
  • Published:2021-08-15

非均匀静子布局对转子叶片振动的影响

牛永红1,侯安平1,张明明2,郭昊雁3,孙天瑞1   

  1. 北京航空航天大学 能源与动力工程学院,北京 100191,北京航空航天大学 能源与动力工程学院,北京 100191,北京大学 工学院,北京 100871,北京动力机械研究所,北京 100074,北京航空航天大学 能源与动力工程学院,北京 100191
  • 作者简介:牛永红(1989—),女,硕士生,研究领域为航空发动机气动热力学。
  • 基金资助:
    国家自然基金(60934001;51306003)。

Abstract: The effects of asymmetric vane spacing on the aerodynamic force on the surface and the dynamic response level of the downstream rotor blade were analyzed using the fluid-structure interaction method in the time-domain. Two different types of asymmetric vane spacing,variation of the flow angle and variation of the vane spacing were studied. The results show that the vibration of the rotor blade is forced response under the wake excitation from upstream. The single-frequency of high amplitude of blade vibration is changed to the multi-frequency of low amplitude due to the upstream asymmetric vane spacing. The reduction of the dynamic response level under variation of the vane spacing is more advantageous,and the effect is optimal when vane spacing variation of two segments is between 4%~5%. In this model,case 4 is optimal because of the reduction of 28% on the amplitude of the vane passing frequency.

Key words: Blade;Rotor;Forced response;Vibration reduction;Asymmetric;Fluid-structure interaction

摘要: 采用时域上的流固耦合模拟方法分析了非均匀静子布局对下游转子叶片表面气流激振力及转子叶片动力响应水平的影响。主要分析了两扇区不同气流角和不同叶片栅距这两种非均匀布局类型。结果表明,转子叶片的振动特性主要体现为上游静子尾迹激励下的强迫响应,在上游非均匀静子布局下,其由单频高幅值振动转变为多频低幅值振动;不同栅距类型更利于降低叶片振动响应水平,两扇区栅距变化为4%~5%时最佳。在此模型里方案四在静子通过频率处应力幅值降低28%,为最优布局。

关键词: 叶片;转子;强迫响应;减振;非均匀;流固耦合