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首页> 外文期刊>Journal of Aircraft >Forced and Aeroelastic Responses of Bird-Damaged Fan Blades: A Comparison and Its Implications
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Forced and Aeroelastic Responses of Bird-Damaged Fan Blades: A Comparison and Its Implications

机译：鸟损坏风扇叶片的强迫和气弹响应：比较及其启示

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摘要

The aeroelastic response of a bird-damaged fan stage at the inlet of a high-bypass ratio turbofan engine is examined using a combined computational fluid dynamics and computational structural dynamics framework. The damaged fan sector consists of five blades obtained from accurate numerical simulation of the bird impact. Forced and aeroelastic response calculations are performed and compared to assess the role of aeroelastic coupling. The calculations are performed at 100, 75, and 60% throttle settings to investigate the role of engine speed on the fan response. Results from the forced response and aeroelastic response calculations indicate that the undamaged blades opposite the damaged sector exhibit the highest level of structural response. Comparing the forced response with the aeroelastic response shows increased participation of the higher structural modes, especially for the damaged blades, that grow in time or exhibit beating. Examination of the work performed by the aerodynamic forces suggests that the growth in blade response is due to aeroelastic phenomena and can cause a potential instability. The results illustrate the importance of aeroelastic effects when predicting the post-bird-strike fan response.
机译：使用组合的计算流体动力学和计算结构动力学框架，检查了高旁路比涡轮风扇发动机进口处的鸟形风扇级的气动弹性响应。损坏的风扇扇形由五个叶片组成，这些叶片是通过对鸟撞击的精确数值模拟获得的。进行强迫和气动弹性响应计算并进行比较，以评估气动弹性耦合的作用。该计算在100％，75％和60％的节气门设置下执行，以研究发动机转速对风扇响应的影响。强制响应和气动弹性响应计算的结果表明，与损坏扇区相对的未损坏叶片表现出最高水平的结构响应。将强制响应与气动弹性响应进行比较，可以看出随着时间的推移增长或表现出跳动的更高结构模式（尤其是受损叶片）的参与度更高。对空气动力的功进行检查表明，叶片响应的增长是由于空气弹性现象引起的，并且可能引起潜在的不稳定性。结果表明，在预测鸟击后的风机响应时，空气弹性效应的重要性。

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  • 来源
    《Journal of Aircraft》 |2016年第2期|561-577|共17页
  • 作者

    Muir Eric R.; Friedmann Peretz P.;

  • 作者单位

    Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA|Boeing Co, Seattle, WA 98124 USA;

    Univ Michigan, Dept Aerosp Engn, Aerosp Engn, Ann Arbor, MI 48109 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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