A new method for determining rotordynamic forces on liquid annular seals /
| Main Author: | |
|---|---|
| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1990.
|
| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | A new method capable of determining liquid rotordynamic coefficients on various rotating turbomachinery components has been developed and applied to annular seals. The analysis is applicable to a small circular motion about the centric position. The method is based on solving the incompressible turbulent flow field associated with the operation of a general component using a finite element approach. A new concept employing element deformation is used to model the eccentricty within the component. The deformable grid is unlike popular adaptive grid methods in that the grid deformation is caused by virtual displacements of the computational nodes in the new method, as opposed to physically generating a new grid at each time step. Results of this new method are in excellent agreement with the cross-coupled stiffness and direct damping coefficients obtained by measurements and other analytical methods. The current method overpredicts the cross-coupled damping and direct inertia coefficients compared with other analytical methods. |
|---|---|
| Item Description: | Typescript (photocopy). Vita. Major subject: Mechanical engineering. |
| Physical Description: | xiii, 88 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |