0
TECHNICAL PAPERS: Gas Turbines: Turbomachinery

Lateral Forces From Single Gland Rotor Labyrinth Seals in Turbines

[+] Author and Article Information
Bum Ho Song, Seung Jin Song

School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea

J. Eng. Gas Turbines Power 126(3), 626-634 (Aug 11, 2004) (9 pages) doi:10.1115/1.1690771 History: Received December 01, 2001; Revised March 01, 2002; Online August 11, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.

References

Varmes,  G., 1960, “A Fluid Mechanics Approach to the Labyrinth Seal Leakage Problem,” ASME J. Basic Eng., 82(2), pp. 265–275.
Denton, J. D., and Johnson, C. G., 1976, “Tip Leakage Loss of Shrouded Turbine Blades,” CEGB Report R/M/N848.
Pfau, A., Treiber, M., Sell, M., and Gyarmathy, G., 2000, “Flow Interaction From the Cavity of an Axial Turbine Blade Row Labyrinth Seal,” ASME Paper No. 2000-GT-481.
Peters, P., Breisig, V., Giboni, A., Lerner, C., and Pfost, H., 2000, “The Influence of the Clearance of Shrouded Rotor Blades on the Development of the Flowfield and Losses in the Subsequent Stator,” ASME Paper No. 2000-GT-478.
Hunter, Scott D., and Manwaring, Steven R., 2000, “Endwall Cavity Flow Effects on Gaspath Aerodynamics in an Axial Flow Turbine—Part 1: Experimental and Numerical Investigation,” ASME Paper No. 2000-GT-651.
Wallis, A., Denton, J., and Demargne, A., 2000, “The Control of Shroud Leakage Flows to Reduce Aerodynamic Losses in a Low Aspect Ratio, Shrouded Axial Flow Turbine,” ASME Paper No. 2000-GT-475.
Den Hartog, J. P., 1956, Mechanical Vibrations, 4th Ed., McGraw-Hill, New York, pp. 319–321.
Thomas,  H. J., 1958, “Unstable Natural Vibration of Turbine Rotors Induced by the Clearance Flow in Glands and Blading,” Bull. de I’A.I.M.,71(11/12), pp. 1039–1063.
Alford,  J., 1965, “Protecting Turbomachinery From Self-Excited Rotor Whirl,” ASME J. Eng. Gas Turbines Power, 87, pp. 333–334.
Ehrich, F. F., 1976, “Self-Excited Vibration,” Shock and Vibration Handbook, 2nd Ed., McGraw-Hill, New York, pp. 1–5.
Ehrich,  F. F., and Childs,  D. W., 1984, “Self Excited Vibration in High Performance Turbomachinery,” Mech. Eng. (Am. Soc. Mech. Eng.), pp. 66–79.
Kostyuk,  A. G., 1972, “A Theoretical Analysis of the Aerodynamic Forces in the Labyrinth Glands of Turbomachines,” Teploenergetica,19(11), pp. 29–33.
Iwatsubo, T., 1980, “Evaluation of Instability Forces in Labyrinth Seals in Turbines or Compressors,” NASA CP-2133, pp. 139–169.
Millsaps,  K., and Martinez-Sanchez,  M., 1994, “Dynamic Forces From Single Gland Labyrinth Seals—Part I: Ideal and Viscous Decomposition,” ASME J. Turbomach., 116, pp. 686–693.
Qiu, Y. J., 1985, “An Investigation of Destabilizing Blade Tip Forces for Shrouded and Unshrouded Turbines,” S.M. thesis, Department of Aeronautics and Astronautics, M.I.T., Cambridge, MA.
Song,  S. J., and Martinez-Sanchez,  M., 1997, “Rotordynamic Forces Due to Turbine Tip Leakage—Part I: Blade Scale Effects,” ASME J. Turbomach., 119, pp. 695–703.
Song,  S. J., and Martinez-Sanchez,  M., 1997, “Rotordynamic Forces Due to Turbine Tip Leakage—Part II: Radius Scale Effects and Experimental Verification,” ASME J. Turbomach., 119, pp. 704–713.
Denton,  J. D., 1993, “Loss Mechanism in Turbomachines,” ASME J. Turbomach., 115, pp. 621–656.

Figures

Grahic Jump Location
Perturbation in the rotor region flow pressure versus azimuthal angle; unshrouded prediction from Song and Martinez-Sanchez 1617
Grahic Jump Location
Pressure perturbation in the seal gland versus azimuthal angle
Grahic Jump Location
Rotor blade loading perturbation versus azimuthal angle; unshrouded prediction from Song and Martinez-Sanchez 1617
Grahic Jump Location
A cutaway section of a single gland turbine labyrinth seal
Grahic Jump Location
Schematic view of a turbine stage with shrouded rotor
Grahic Jump Location
Labyrinth seal parameters
Grahic Jump Location
Control volume for axial momentum analysis
Grahic Jump Location
Coordinate system for the eccentric analysis
Grahic Jump Location
Leakage mass flow amount versus sealing gap for Pfau et al. 3 annular cascade
Grahic Jump Location
Radial distributions of relative axial and tangential velocities at seal cavity exit (Station 3r)
Grahic Jump Location
Absolute flow angle at the rotor exit for Peters et al. 4 turbine
Grahic Jump Location
Velocity vectors at Stations 2 and 3
Grahic Jump Location
Upstream axial velocity perturbation versus azimuthal angle; unshrouded prediction from Song and Martinez-Sanchez 1617
Grahic Jump Location
Upstream pressure perturbation versus azimuthal angle; unshrouded prediction from Song and Martinez-Sanchez 1617

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