Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery
Joint Authors
Hamzehlouia, Sina
Behdinan, Kamran
Source
International Journal of Aerospace Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-12-18
Country of Publication
Egypt
No. of Pages
16
Abstract EN
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.
American Psychological Association (APA)
Hamzehlouia, Sina& Behdinan, Kamran. 2016. Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery. International Journal of Aerospace Engineering،Vol. 2016, no. 2016, pp.1-16.
https://search.emarefa.net/detail/BIM-1105002
Modern Language Association (MLA)
Hamzehlouia, Sina& Behdinan, Kamran. Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery. International Journal of Aerospace Engineering No. 2016 (2016), pp.1-16.
https://search.emarefa.net/detail/BIM-1105002
American Medical Association (AMA)
Hamzehlouia, Sina& Behdinan, Kamran. Squeeze Film Dampers Executing Small Amplitude Circular-Centered Orbits in High-Speed Turbomachinery. International Journal of Aerospace Engineering. 2016. Vol. 2016, no. 2016, pp.1-16.
https://search.emarefa.net/detail/BIM-1105002
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1105002