ANALYSIS OF PNEUMATIC HAMMER INSTABILITY OF INHERENTLY COMPENSATED HYDROSTATIC THRUST GAS BEARINGS

Abstract

Pneumatic hammer instability of an inherently compensated thrust gas bearing was analyzed theoretically. Vohr's experimental correlation between pressure loss coefficient and Reynolds' number was used to calculate flow through the restrictor instead of using the nozzle equations. The time dependent Reynolds' equation was solved by a perturbation analysis for small axial oscillation. Based on the perturbation analysis, dynamic stiffness and damping coefficient were calculated. Utilizing these and Pan's stability criteria stability maps were constructed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0807718

Entities

People

  • C. H. Pan
  • T. Chiang

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Bearings
  • Boundaries
  • Coefficients
  • Differential Equations
  • Equations
  • Flow
  • Frequency
  • Gas Bearings
  • Geometry
  • Instability
  • Mach Number
  • Oscillation
  • Pressure Distribution
  • Steady State
  • Stiffness
  • Vibration

Fields of Study

  • Physics

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Structural Dynamics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).