Non-Synchronous Vibration of Turbomachinery Airfoils
Final rept. 1 Apr 2003-28 Feb 2006
DUKE UNIV DURHAM NC DEPT OF MECHANICAL ENGINEERING AND MATERIALS SCIENCE
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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.
- Hydraulic and Pneumatic Equipment