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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
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References

Messenger, A. , Williams, R. , Ingram, G. , Hogg, S. , Tibos, S. , and Seaton, J. , 2015, “ A Dynamic Clearance Seal for Steam Turbine Application,” ASME Paper No. GT2015-43471.
Munson, J. , 1993, “ Testing of a High Performance Compressor Discharge Seal,” AIAA Paper No. 931997.
Berard, G. , and Zheng, X. , 2008, “ Development of Non-Contacting, Low-Leakage, Large-Diameter Air Seal,” AIAA Paper No. 2008-4507.
Turnquist, N. A. , Tseng, T. W. , McNickle, A. D. , Athavale, M. , and Steinetz, B. M. , 1999, “ Analysis and Full Scale Testing of an Aspirating Face Seal With Improved Flow Isolation,” AIAA Paper No. 1998-3285.
Munson, J. , Grant, D. , and Agrawal, G. , 2002, “ Foil Film Riding Face Seal Proof-of-Concept Testing,” AIAA Paper No. 2002-3791.
Gardner, J. , 1999, “ Development of a High Speed, High Temperature Compressor Discharge Seal,” AIAA Paper No. 1999-2684.
Menendez, R. , and Cunningham, M. , 1999, “ Development of Liftoff Seal Technology for Air-Oil Axial Sealing Applications,” AIAA Paper No. 1999-2822.
San Andres, L. , and Anderson, A. , 2014, “ An All-Metal Compliant Seal Versus a Labyrinth Seal: A Comparison of Gas Leakage at High Temperatures,” ASME J. Eng. Gas Turbines Power., 137(5), p. 052504.
Justak, J. , and Crudgington, P. , 2006, “ Evaluation of a Film Riding Hybrid Seal,” AIAA Paper No. 2006-4932.
Grondahl, C. M. , and Dudley, J. C. , 2010, “ Film-Riding Leaf Seals for Improved Shaft Sealing,” ASME Paper No. GT2010-23629.
Kirk, T. , Bowsher, A. , Crudgington, P. , Pawlak, A. , Grondahl, C. M. , and Dudley, J. , 2016, “ Film Riding Pressure Activated Leaf Seal Proof of Concept,” AIAA Paper No. 2016-4920.
Grondahl, C. M. , 2009, “ Pressure-Actuated Leaf Seal Feasibility Study and Demonstration,” AIAA Paper No. 2009-5167.
DiRusso, E. , 1982, “ Film Thickness Measurements for Spiral Groove and Rayleigh Step Lift Pad Self-Acting Face Seals,” NASA Technical Paper, Report No. 2058.
Tournerie, B. , Huitric, J. , Bonneau, D. , and Frene, J. , 1994, “ Optimisation and Performance Prediction of Grooved Face Seals for Gases and Liquids,” 14th International Conference on Fluid Sealing, Florence Italy, Apr. 6–8, pp. 351–365.
Cheng, H. S. , Chow, C. Y. , and Wilcock, D. F. , 1968, “ Behavior of Hydrostatic and Hydrodynamic Noncontacting Face Seals,” J. Lubr. Technol., 90(2), pp. 510–519. [CrossRef]
Tibos, S. M. , Teixeira, J. A. , and Georgakis, C. , 2017, “ Investigation of Effective Groove Types for a Film-Riding Seal,” ASME J. Eng. Gas Turbines Power, 139(7), p. 072503. [CrossRef]
Pekris, M. J. , Franceschini, G. , and Gillespie, D. R. H. , 2011, “ Effect of Geometric Changes in an Idealised Contacting Brush Seal Bristle Pack on Typical Key Performance Measures,” ASME Paper No. GT2011-46492.
Untaroiu, A. , Liu, C. , Migliorini, P. J. , Wood, H. G. , and Untaroiu, C. D. , 2014, “ Hole-Pattern Seals Performance Evaluation Using Computational Fluid Dynamics and Design of Experiment Techniques,” ASME J. Eng. Gas Turbines Power, 136(10), p. 102501. [CrossRef]
Morgan, N. R. , Untaroiu, A. , Migliorini, P. J. , and Wood, H. G. , 2014, “ Design of Experiments to Investigate Geometric Effects on Fluid Leakage Rate in a Balance Drum Seal,” ASME J. Eng. Gas Turbines Power, 137(3), p. 032501. [CrossRef]
Lebeck, A. O. , 1991, Principles and Design of Mechanical Face Seals, Wiley, Hoboken, NJ, p. 764.
Galimutti, P. , Sawicki, J. , and Fleming, D. , 2009, “ Analysis of Finger Seal Lift Pads,” ASME Paper No. GT2009-59842.
Temis, J. M. , Selivanov, A. V. , and Dzeva, I . J. , 2013, “ Finger Seal Design Based on Fluid–Solid Interaction Model,” ASME Paper No. GT2013-95701.
Yue, G. , Zheng, Q. , and Zhu, R. , 2008, “ Numerical Simulation of a Padded Finger Seal,” ASME Paper No. GT2008-50997.
Szeri, A. Z. , 1980, Tribology, Friction, Lubrication, and Wear, McGraw-Hill, New York.
Proctor, M. , and Delgado, I. , 2008, “ Preliminary Test Results of a Non-Contacting Finger Seal on a Herringbone-Grooved Rotor,” AIAA Paper No. 2008-4506.
Minitab, 2010, “ Minitab 17 Statistical Software (2010),” Minitab, State College, PA.
Munson, J. , Grant, D. , and Agrawal, G. , 2001, “ Foil Face Seal Development,” AIAA Paper No. 2001-3483.

Figures

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Fig. 1

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

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Fig. 2

Finite difference control volume in Cartesian coordinates

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Fig. 3

Trade-off plot for solution accuracy against computational time

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Fig. 4

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

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Fig. 5

Modeled section and repeating groove pattern

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Fig. 6

Rayleigh step geometry

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Fig. 7

Pareto chart for the reduced model

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Fig. 8

Main effects plot for Rayleigh step screening parameters

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Fig. 9

Reduced model Pareto chart dimensionless load

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Fig. 10

Reduced model Pareto chart dimensionless stiffness

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Fig. 11

Main effects plot for dimensionless load

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Fig. 12

Main effects plot for dimensionless stiffness

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Fig. 13

Inclined groove geometry

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Fig. 14

Pareto chart for inclined groove initial model

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Fig. 15

Main effects plot for inclined groove initial factorial design

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Fig. 16

Reduced model Pareto chart dimensionless load

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Fig. 17

Reduced model Pareto chart dimensionless stiffness

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Fig. 18

Main effects plot for dimensionless load

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Fig. 19

Main effects plot for dimensionless stiffness

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