Volume 36 Issue 12
Dec.  2021
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Article Navigation >  Journal of Aerospace Power  > 2021  >  36(12): 2524-2536
CHEN Dawei, XIAO Jiaguangyi, CHEN Yong. Influence law of blade profiling of wide-chord fan on rub-induced vibration[J]. Journal of Aerospace Power, 2021, 36(12): 2524-2536. doi: 10.13224/j.cnki.jasp.20210054
Citation: CHEN Dawei, XIAO Jiaguangyi, CHEN Yong. Influence law of blade profiling of wide-chord fan on rub-induced vibration[J]. Journal of Aerospace Power, 2021, 36(12): 2524-2536. doi: 10.13224/j.cnki.jasp.20210054
shu

Influence law of blade profiling of wide-chord fan on rub-induced vibration

doi: 10.13224/j.cnki.jasp.20210054
  • 1.

    School of Mechanical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China

  • 2.

    Engineering Research Center of Gas Turbine and Civil Aero Engine，Ministry of Education，Shanghai Jiao Tong University，Shanghai 200240，China

  • Received Date: 2021-02-04
  • Publish Date: 2021-12-28
    Abstract
  • Based on the superposition principle of geometric features，a parameterized wide-chord fan blade model was established，and the influence of blade profiling on rub-induced vibration was also studied by rub-impact dynamics.The complex geometric shape of wide-chord fan blades may enhance the rubbing nonlinearity，so it is necessary to study the influence of blade geometry on the rub-induced vibration.The relationship between the blade profiling and geometric parameters was established in the cylindrical coordinate system，and the parameterized model of the fan blade was obtained.With the calculation of blade tip clearance simplified by cubic spline fitting，the correlation between the vibration response，coating wear and blade stress of the basic blade was investigated under eccentric rubbing conditions.The blade rubbing characteristics of different geometric features were analyzed by the degree of wear of abradable coating，realizing the rapid analysis of rubbing vibration and blade profiling.The calculation results showed that the inner flow path angle had a significant influence on the blade length and natural frequency，which adjusted the center resonance frequency；by changing the direction of minimum bending stiffness，the tip twist angle effectively reduced the rubbing resonance interval；compared with the forward-lean blade，the backward-lean blade had better rubbing stability.

     

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