Fluid Dynamic - Structural Interactions of Labyrinth Seals.

Abstract

Aln analytical model was formulated for the calculation of unsymmetrical pressure distributions inside the cavities of a multi-stage labyrinth seal. The model is based on a set of linearized continuity and momentum equations for the throughflow, and can account for the effects of rotation, whirl, flow swirl, differential gap width and (limited) compressibility. Preliminary calculations show excellent agreement with non-whirling side-force data in the literature. Also, models are being constructed that will permit calculation of the effect of these seal forces on the running stability of flexible, highly loaded turbomachines, with the Space Shuttle Main Engine serving as the prototype of such machines.

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Document Details

Document Type
Technical Report
Publication Date
Jun 03, 1986
Accession Number
ADA174461

Entities

People

  • John Dugundji
  • Manuel Martinez-sanchez

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Astronautics
  • Computational Fluid Dynamics
  • Engines
  • Equations
  • Fluid Dynamics
  • Fluid Mechanics
  • Gas Turbines
  • Geometry
  • Labyrinth Seals
  • Mechanical Properties
  • Physics Laboratories
  • Pressure Distribution
  • Space Shuttles
  • Turbines
  • Turbomachinery
  • Two Dimensional

Readers

  • Aerodynamics.
  • Structural Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster
  • Space - Spacecraft Maneuvers