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Title: Performance evaluation of bidirectional dry gas seals with special groove geometry
Authors: Su, H.
Rahmani, Ramin
Rahnejat, Homer
Keywords: Dry grooved gas seal
Hydrodynamic lift
Power loss
Issue Date: 2016
Publisher: © Society of Tribologists and Lubrication Engineers. Published by Taylor & Francis.
Citation: SU, H., RAHMANI, R. and RAHNEJAT, H., 2016. Performance evaluation of bidirectional dry gas seals with special groove geometry. Tribology Transactions, 60(1), pp. 58-69.
Abstract: There are a very few studies of bidirectional gas seals particularly those with certain profiles used in the industry. Parametric study of performance of bidirectional dry gas seals under a set of operating conditions is presented. The expounded approaches uses solution of 3D Navier-Stokes momentum and continuity equations for various forms of grooved gas seals, particular for the trapezoidal shape variety for which there has been a particular dearth of in-depth analysis. It is shown that such groove geometries enhance the load carrying capacity of the seal through increased hydrodynamic lift. This is as the result of enhanced localised wedge flow particularly with a reduced seal gap. Therefore, there is the opportunity of gap minimisation, whilst reducing leakage rate and power loss. For given operating loading, kinematic and thermal conditions as well as seal geometry and topography, the operating minimum film thickness may be considered as the main design parameter.
Description: This is an Accepted Manuscript of an article published by Taylor & Francis in Tribology Transactions on 4th April 2016, available online: http://dx.doi.org/10.1080/10402004.2016.1146380
Version: Accepted for publication
DOI: 10.1080/10402004.2016.1146380
URI: https://dspace.lboro.ac.uk/2134/20879
Publisher Link: http://dx.doi.org/10.1080/10402004.2016.1146380
ISSN: 1040-2004
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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