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contributor authorTibos, S. M.
contributor authorGeorgakis, C.
contributor authorTeixeira, J. A.
contributor authorHogg, S.
date accessioned2019-02-28T10:58:32Z
date available2019-02-28T10:58:32Z
date copyright11/21/2017 12:00:00 AM
date issued2018
identifier issn0742-4795
identifier othergtp_140_05_052502.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4251333
description abstractVarying clearance, rotor-following seals are a key technology for meeting the demands of increased machine flexibility for conventional power units. These seals follow the rotor through hydrodynamic or hydrostatic mechanisms. Forward-facing step (FFS) and Rayleigh step designs are known to produce positive fluid stiffness. However, there is very limited modeling or experimental data available on the hydrostatic fluid forces generated from either design. A quasi-one-dimensional (1D) method has been developed to describe both designs and validated using test data. Tests have shown that the FFS and the Rayleigh step design are both capable of producing positive film stiffness and there is little difference in hydrostatic force generation between the two designs. This means any additional hydrodynamic features in the Rayleigh step design should have a limited effect on hydrostatic fluid stiffness. The analytical model is capable of modeling both the inertial fluid forces and the viscous fluid losses, and the predictions are in good agreement with the test data.
publisherThe American Society of Mechanical Engineers (ASME)
titleInvestigation of Hydrostatic Fluid Forces in Varying Clearance Turbomachinery Seals
typeJournal Paper
journal volume140
journal issue5
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4038136
journal fristpage52502
journal lastpage052502-8
treeJournal of Engineering for Gas Turbines and Power:;2018:;volume( 140 ):;issue: 005
contenttypeFulltext


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