0
Research Papers: Gas Turbines: Structures and Dynamics

Detailed Study on Stiffness and Load Characteristics of Film-Riding Groove Types Using Design of Experiments

[+] Author and Article Information
S. M. Tibos

GE Power,
Newbold Road,
Rugby CV21 2NH, UK
e-mail: stacie.tibos@ge.com

C. Georgakis, K. Harvey

GE Power,
Newbold Road,
Rugby CV21 2NH, UK

J. A. Teixeira

Centre for Power Engineering,
Cranfield University,
College Road,
Cranfield MK43 0AL, Bedfordshire, UK

Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received May 25, 2016; final manuscript received February 11, 2017; published online April 11, 2017. Assoc. Editor: Alexandrina Untaroiu.

J. Eng. Gas Turbines Power 139(9), 092501 (Apr 11, 2017) (9 pages) Paper No: GTP-16-1192; doi: 10.1115/1.4036058 History: Received May 25, 2016; Revised February 11, 2017

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 maximize 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 solver to explore the design space. Key parameters have been identified that can be used to optimize a seal design. The results indicate that the relationship between parameters is not a simple linear relationship. 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 © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of a radially complaint film-riding seal on a steam turbine blade tip

Grahic Jump Location
Fig. 2

Finite difference control volume in Cartesian coordinates

Grahic Jump Location
Fig. 3

Trade-off plot for solution accuracy against computational time

Grahic Jump Location
Fig. 4

A discretized geometry for an inclined groove using 50 × 50 grid

Grahic Jump Location
Fig. 5

Modeled section and repeating groove pattern

Grahic Jump Location
Fig. 6

Rayleigh step geometry

Grahic Jump Location
Fig. 7

Pareto chart for the reduced model

Grahic Jump Location
Fig. 8

Main effects plot for Rayleigh step screening parameters

Grahic Jump Location
Fig. 9

Reduced model Pareto chart dimensionless load

Grahic Jump Location
Fig. 10

Reduced model Pareto chart dimensionless stiffness

Grahic Jump Location
Fig. 11

Main effects plot for dimensionless load

Grahic Jump Location
Fig. 12

Main effects plot for dimensionless stiffness

Grahic Jump Location
Fig. 13

Inclined groove geometry

Grahic Jump Location
Fig. 14

Pareto chart for inclined groove initial model

Grahic Jump Location
Fig. 15

Main effects plot for inclined groove initial factorial design

Grahic Jump Location
Fig. 16

Reduced model Pareto chart dimensionless load

Grahic Jump Location
Fig. 17

Reduced model Pareto chart dimensionless stiffness

Grahic Jump Location
Fig. 18

Main effects plot for dimensionless load

Grahic Jump Location
Fig. 19

Main effects plot for dimensionless stiffness

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In