Volume 32 Issue 7
Jul.  2017
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Fan rotor blade flutter free design technology[J]. Journal of Aerospace Power, 2017, 32(7): 1718-1727. doi: 10.13224/j.cnki.jasp.2017.07.024
Citation: Fan rotor blade flutter free design technology[J]. Journal of Aerospace Power, 2017, 32(7): 1718-1727. doi: 10.13224/j.cnki.jasp.2017.07.024

Fan rotor blade flutter free design technology

doi: 10.13224/j.cnki.jasp.2017.07.024
  • Received Date: 2016-11-07
  • Publish Date: 2017-07-28
  • Flutter free design technology of a two stages fan was investigated. During fan rotor blades design, appropriate aspect ratio was selected by considering aerodynamic performance, weight and flutter stability. Energy method was used to analyze the flutter stability for both rotor blades of the fan. Blade thickness, three dimensional blade shape and tip to hub chord ratio were modified to eliminate the flutter risk. The investigation showed that the aspect ratio was not the only parameter of concern for flutter free design in conceptual design phase. The near stall points at the rotational speed when blade tip flow was transonic were more prone to flutter. Strong shock waves could enhance the coupling effect between fluid and structure, and induce complex construction of aerodynamic work distribution. Blade thickness and tip to hub chord ratio were effective parameters to improve flutter risk.

     

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