Volume 32 Issue 4
Apr.  2017
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Research on excitability of the wake of stator in aero-engine to high order resonance of bladed-disk[J]. Journal of Aerospace Power, 2017, 32(4): 780-790. doi: 10.13224/j.cnki.jasp.2017.04.002
Citation: Research on excitability of the wake of stator in aero-engine to high order resonance of bladed-disk[J]. Journal of Aerospace Power, 2017, 32(4): 780-790. doi: 10.13224/j.cnki.jasp.2017.04.002

Research on excitability of the wake of stator in aero-engine to high order resonance of bladed-disk

doi: 10.13224/j.cnki.jasp.2017.04.002
  • Received Date: 2015-09-06
  • Publish Date: 2017-04-28
  • Targeting the forced vibration of bladed-disk in aero-engine, the impact of the severity of resonances induced by flow-wake of stator was studied. On the basis of the numerical simulation of unsteady stator-rotor interface flow, both frequency spectrum and spatial spectrum of aerodynamic pressure on the rotor surface were obtained respectively by fast Fourier transformation. Meanwhile, the excitability of wake was defined as the projection of aerodynamic pressure on the modal space, also called modal force, so as to evaluate the strength of resonant response of bladed disk. The analysis shows that the excitability of wake to a non-primary resonance is much less than a primary resonance. As a result, it is reasonable that in the operating speed region of aero-engine, the existence of high-order resonances with small complementary angle between aerodynamic force and modal displacement of bladed disk (small excitability), should be accepted.

     

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