Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery
This work represents a pressure distribution model for finite length squeeze film dampers (SFDs) executing small amplitude circular-centered orbits (CCOs) with application in high-speed turbomachinery design. The proposed pressure distribution model only accounts for unsteady (temporal) inertia term...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2016-01-01
|
| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/5127096 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832562457164382208 |
|---|---|
| author | Sina Hamzehlouia Kamran Behdinan |
| author_facet | Sina Hamzehlouia Kamran Behdinan |
| author_sort | Sina Hamzehlouia |
| collection | DOAJ |
| description | This work represents a pressure distribution model for finite length squeeze film dampers (SFDs) executing small amplitude circular-centered orbits (CCOs) with application in high-speed turbomachinery design. The proposed pressure distribution model only accounts for unsteady (temporal) inertia terms, since based on order of magnitude analysis, for small amplitude motions of the journal center, the effect of convective inertia is negligible relative to unsteady (temporal) inertia. In this work, the continuity equation and the momentum transport equations for incompressible lubricants are reduced by assuming that the shapes of the fluid velocity profiles are not strongly influenced by the inertia forces, obtaining an extended form of Reynolds equation for the hydrodynamic pressure distribution that accounts for fluid inertia effects. Furthermore, a numerical procedure is represented to discretize the model equations by applying finite difference approximation (FDA) and to numerically determine the pressure distribution and fluid film reaction forces in SFDs with significant accuracy. Finally, the proposed model is incorporated into a simulation model and the results are compared against existing SFD models. Based on the simulation results, the pressure distribution and fluid film reaction forces are significantly influenced by fluid inertia effects even at small and moderate Reynolds numbers. |
| format | Article |
| id | doaj-art-325da36c7bb749c9a0a2ebb5ea9dbd42 |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-325da36c7bb749c9a0a2ebb5ea9dbd422025-02-03T01:22:37ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742016-01-01201610.1155/2016/51270965127096Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed TurbomachinerySina Hamzehlouia0Kamran Behdinan1Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, CanadaDepartment of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, CanadaThis work represents a pressure distribution model for finite length squeeze film dampers (SFDs) executing small amplitude circular-centered orbits (CCOs) with application in high-speed turbomachinery design. The proposed pressure distribution model only accounts for unsteady (temporal) inertia terms, since based on order of magnitude analysis, for small amplitude motions of the journal center, the effect of convective inertia is negligible relative to unsteady (temporal) inertia. In this work, the continuity equation and the momentum transport equations for incompressible lubricants are reduced by assuming that the shapes of the fluid velocity profiles are not strongly influenced by the inertia forces, obtaining an extended form of Reynolds equation for the hydrodynamic pressure distribution that accounts for fluid inertia effects. Furthermore, a numerical procedure is represented to discretize the model equations by applying finite difference approximation (FDA) and to numerically determine the pressure distribution and fluid film reaction forces in SFDs with significant accuracy. Finally, the proposed model is incorporated into a simulation model and the results are compared against existing SFD models. Based on the simulation results, the pressure distribution and fluid film reaction forces are significantly influenced by fluid inertia effects even at small and moderate Reynolds numbers.http://dx.doi.org/10.1155/2016/5127096 |
| spellingShingle | Sina Hamzehlouia Kamran Behdinan Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery International Journal of Aerospace Engineering |
| title | Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery |
| title_full | Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery |
| title_fullStr | Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery |
| title_full_unstemmed | Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery |
| title_short | Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery |
| title_sort | squeeze film dampers executing small amplitude circular centered orbits in high speed turbomachinery |
| url | http://dx.doi.org/10.1155/2016/5127096 |
| work_keys_str_mv | AT sinahamzehlouia squeezefilmdampersexecutingsmallamplitudecircularcenteredorbitsinhighspeedturbomachinery AT kamranbehdinan squeezefilmdampersexecutingsmallamplitudecircularcenteredorbitsinhighspeedturbomachinery |