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首页> 外文期刊>International journal of aerospace engineering >Axial Spacing Effects on Rotor-Rotor Interaction Noise and Vibration in a Contra-Rotating Fan
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Axial Spacing Effects on Rotor-Rotor Interaction Noise and Vibration in a Contra-Rotating Fan

机译：轴距对对流风扇中转子相互作用的噪声和振动的影响

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摘要

Because of the potential technical advantages, the contra-rotation technology has become a renewed interest in aviation and other applications. Contra-rotation increases efficiency in comparison with the single-rotor design, but this advantage is not fully harnessed. The axial spacing of two-stage contra-rotating blade rows has a significant impact on a contra-rotating fan/compressor. The results show that with a contra-rotation pattern, the strong unsteadiness of two-stage rotors is caused by the rotor-rotor interaction. The unsteadiness of rotor 1 is caused by the potential disturbance, and the upstream wake leads to the strong unsteadiness of rotor 2. With the increase of axial spacing, the rotor-rotor interaction is weakened, while unsteady features of two-stage rotor blades tend to be consistent. The acoustic and vibration effects of axial spacing are studied. It is found that the axial spacing has great influence of aerodynamic noise. The mean value of sound pressure level decreases by 17.2dB in total when the axial spacing increased to 1.1 chord from 0.3 chord. For the accuracy of calculation, the scattering effect of the casing wall should be considered in the prediction of the noise. The axial spacing does not have obvious effects on the natural frequencies of the two-stage rotor blades but has certain effect on blade deformation.
机译：由于潜在的技术优势，对转技术已成为航空和其他应用领域的新兴趣。与单转子设计相比，反向旋转可提高效率，但这种优势并未得到充分利用。两级反向旋转叶片排的轴向间距对反向旋转风扇/压缩机具有重大影响。结果表明，在反向旋转模式下，两级转子的强烈不稳定性是由转子-转子之间的相互作用引起的。转子1的不稳定是由潜在的扰动引起的，上游尾流会导致转子2的强烈不稳定。随着轴向间距的增加，转子与转子之间的相互作用会减弱，而两级转子叶片的不稳定特性趋向于保持一致。研究了轴向间距的声学和振动效应。发现轴向间隔对空气动力噪声有很大的影响。当轴向间距从0.3弦增加到1.1弦时，声压级的平均值总共降低了17.2dB。为了计算的准确性，在预测噪声时应考虑套管壁的散射效应。轴向间距对两级转子叶片的固有频率没有明显影响，但对叶片变形有一定影响。

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  • 来源
    《International journal of aerospace engineering》 |2019年第1期|2125976.1-2125976.15|共15页
  • 作者

    Luan Hengxuan; Weng Liyuan; Liu Ranhui; Li Dongmin; Wang Mingwei;

  • 作者单位

    Shandong Univ Sci & Technol, Dept Mech & Elect Engn, Tai An, Shandong, Peoples R China;

    Shandong Univ Sci & Technol, Coll Geomat, Qingdao, Peoples R China;

    Shandong Univ Sci & Technol, Dept Mech & Elect Engn, Tai An, Shandong, Peoples R China;

    Shandong Univ Sci & Technol, Dept Mech & Elect Engn, Tai An, Shandong, Peoples R China|Zhejiang Univ, State Key Lab Fluid Power & Mech Syst, Hangzhou, Zhejiang, Peoples R China;

    Shandong Taikai Elect Automat Co Ltd, Tai An, Shandong, Peoples R China;

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