Non-Synchronous Vibration of Turbomachinery Airfoils

Abstract

The goal of this research was to develop a fast computational method to be able to understand non-synchronous vibrations in turbomachinery blades in the design stage. The numerical approach involved the use of a two- and three-dimensional nonlinear Navier- Stokes unsteady harmonic balance method. As an initial demonstration of the method, the flow over a cylinder and a two dimensional airfoil, the 2D C1 case, were investigated and results showed good agreement. For the 3D C1 case and a running tip clearance of 0.020 in., two irrational frequencies were present in the solution so the current HB method could not be used.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2006
Accession Number
ADA453505

Entities

People

  • Edmund T. Pratt Jr.
  • Jeffrey P. Thomas
  • Kenneth C. Hall
  • Meredith Spiker
  • Rhett Jeffries
  • Robert E. Kielb

Organizations

  • Duke University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Euler Equations
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Mechanics
  • Navier Stokes Equations
  • Resonant Frequency
  • Steady Flow
  • Steady State
  • Strain Gages
  • Three Dimensional
  • Turbines
  • Two Dimensional
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Quantum Chemistry