The Measurement and Prediction of Rotordynamic Forces for Labyrinth Seals

Abstract

Measurements of rotordynamic (stiffness and damping) coefficients and leakage characteristics were completed for labyrinth-rotor/honeycombe stator seals. Comparisons to labryinth-rotor/smooth-stator seals showed no stability improvements. Tests were also carried out on smooth-rotor/honeycombe-stator seals and demonstrated superior stability and leakage performance for this type of seal if the entering flow is pre-rotated in the direction of rotation. A new 'bulk-flow' theory for labyrinth seals has been developed and its prediction compare well with measured results for tooth-on-rotor labyrinths. Also, a more sophisticated model was developed which solves the 3-D Reynolds-averaged Navier- Stokes equations for compressible flow. Keywords: Labyrinth seals, Rotordynamic forces, Turbine stators, Computational fluid dynamics.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA197185

Entities

People

  • D. L. Rhode
  • D. W. Childs

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Cartesian Coordinates
  • Compressible Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Convection
  • Differential Equations
  • Fluid Dynamics
  • Fluid Flow
  • Ideal Gas Law
  • Incompressible Flow
  • Measurement
  • Navier Stokes Equations
  • Pressure Distribution
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • Thermal Physics or Thermal Science.