Volume 29 Issue 12
Dec.  2014
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Article Navigation >  Journal of Aerospace Power  > 2014  >  29(12): 2885-2890
WU Chang-bo, ZHOU Bai-hao, CUI Hai-tao, GAO Yuan. Coupling flutter of swept fan rotor blade with small aspect ratio[J]. Journal of Aerospace Power, 2014, 29(12): 2885-2890. doi: 10.13224/j.cnki.jasp.2014.12.014
Citation: WU Chang-bo, ZHOU Bai-hao, CUI Hai-tao, GAO Yuan. Coupling flutter of swept fan rotor blade with small aspect ratio[J]. Journal of Aerospace Power, 2014, 29(12): 2885-2890. doi: 10.13224/j.cnki.jasp.2014.12.014
shu

Coupling flutter of swept fan rotor blade with small aspect ratio

doi: 10.13224/j.cnki.jasp.2014.12.014

  • 1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 2. 18 Research Office, China Gas Turbine Establishment, Aviation Industry Corporation of China, Chengdu 610500, China

  • Received Date: 2013-07-30
  • Publish Date: 2014-12-28
    Abstract
  • Based on structural mechanics, blade coupling flutter characteristics of an engine blisk were analyzed.Analyses of resonance rotating speed, coupling flutter and stall flutter were accomplished by swept fan rotor blade with small aspect ratio. The unusual phenomena showing that the change of dynamic and static frequencies of second-order and third-order on the swept fan blade with small aspect ratio were found, and recognized as another problem relating to coupling flutter. By structure adjustment of swept fan rotor blade with small aspect ratio, it was found that swept-forward blade was an important factor to this unusual phenomenon. Reducing the swept degree of the blade appropriately can avoid the possibility of flutter by design.It is suggested the separation of order frequency degree for the blade should satisfy the design requirement of 10%.

     

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