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Detailed study on stiffness and load characteristics of two film-riding groove types using design of experiments

[+] Author and Article Information
Stacie M. Tibos

GE Power Newbold Road Rugby CV21 2NH United Kingdom
stacie.tibos@ge.com

Christos Georgakis

GE Power Newbold Road Rugby CV21 2NH United Kingdom
christos.georgakis@ge.com

Kevin Harvey

GE Power Newbold Road Rugby CV21 2NH United Kingdom
kevin.harvey@ge.com

Joao A. Teixeira

Centre for Power Engineering Cranfield University College Road Cranfield Bedfordshire MK43 0AL United Kingdom
j.a.amaral.teixeira@cranfield.ac.uk

1Corresponding author.

ASME doi:10.1115/1.4036058 History: Received May 25, 2016; Revised February 11, 2017

Abstract

In the application of film-riding sealing technology there are various groove features that can be used to induce hydrodynamic lift, however, there is little guidance in selecting the relative parameter settings in order to maximise hydrodynamic load and fluid stiffness. In this study two groove types are investigated; Rayleigh step and inclined groove. The study uses a design of experiments approach and a Reynolds equation method to explore the design space. Key parameters have been identified that can be used to optimise seal designs. Results show that the relationship between parameters is likely to be very non-linear. It was also found that higher pressure drops hinder the hydrodynamic load and stiffness of the seal suggesting an advantage for using hydrostatic load support in such conditions.

Copyright (c) 2017 by ASME
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