Accession Number : ADA453505


Title :   Non-Synchronous Vibration of Turbomachinery Airfoils


Descriptive Note : Final rept. 1 Apr 2003-28 Feb 2006


Corporate Author : DUKE UNIV DURHAM NC DEPT OF MECHANICAL ENGINEERING AND MATERIALS SCIENCE


Personal Author(s) : Kielb, Robert E ; Hall, Kenneth C ; Spiker, Meredith ; Thomas, Jeffrey P ; Pratt, Jr , Edmund T ; Jeffries, Rhett


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a453505.pdf


Report Date : Mar 2006


Pagination or Media Count : 75


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.


Descriptors :   *ROTOR BLADES(TURBOMACHINERY) , VIBRATION , AIRFOILS , NUMERICAL METHODS AND PROCEDURES , FLUTTER


Subject Categories : Hydraulic and Pneumatic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE