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Volume 39 Issue 5
May  2013
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Journal of Beijing University of Aeronautics and Astronautics  > 2013  >  39(5): 626-630.
Zheng Yun, Yang Hui. Full assembly fluid/structured flutter analysis of a transonic fan[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(5): 626-630. (in Chinese)
Citation: Zheng Yun, Yang Hui. Full assembly fluid/structured flutter analysis of a transonic fan[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(5): 626-630. (in Chinese)
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Full assembly fluid/structured flutter analysis of a transonic fan

  • School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 24 May 2012
  • Rev Recd Date: 07 May 2013
  • Publish Date: 31 May 2013
    Abstract
  • Numeric method for blade flutter with coupled fluid'structured approach and aeroelastic model of full assembly fan blade vibration were developed. The coupling was achieved by solving governing equations for fluids and the blade vibration simultaneously and exchanging boundary condition at each time step. In the fluid domain, the unsteady Navier-Stokes equations are solved numerically to assess the effects of the deforming blades on the flowfield. The blade motion was calculated by integration of aerodynamic forces on the blades and solving structured dynamic equations. The blade flutter was conducted on a full assembly model in order to avoid pre-defined Inter-Blade-Phase-Angle. This method is capable performing aeroelastic stability analysis of multiple modes/nodal diameter in an unsteady computation, thus the efficiency of time domain aeroelasticity approach was improved. Detailed fluid/structured interaction analysis of NASA rotor 67 were conducted at choked, peak efficiency and near stall operation points to assess the effect of nodal diameter on the aeroelastic stability, the least stable blade vibration mode and nodal diameter was presented. The result indicates that nodal diameter of blade-row vibration is the most influential factor to the aeroelasticity.

     

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