RESEARCH ON GAS LUBRICATION AT HIGH TEMPERATURE AND LOW FLOW RATES.

Abstract

The instability of the hybrid gas journal bearing is investigated analytically. The bearing is supplied with pressurized air through orifices in the centerplane which is approximated by a line source. The gas film equation, Reynolds equation, is solved by the linearized Ph-method including the hydrostatic pressure effect and used to generate the coefficients for the deter mination of the threshold of instability. The equations are solved by numerical integration. The results for threshold speed and frequency are given in the form of graphs. Comparison with experimental data shows qualitative agree ment but quantitatively there are discrepancies of as much as 2:1. This is believed to be caused by too simple an orifice representation whereas the gas film in itself should be correctly treated. A method for correction is discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 27, 1963
Accession Number
AD0426955

Entities

People

  • J. Meacher
  • P. Lewis

Tags

DTIC Thesaurus Topics

  • Bearings
  • Coefficients
  • Equations
  • Experimental Data
  • Flow Rate
  • Frequency
  • High Temperature
  • Hydrostatic Pressure
  • Instability
  • Journal Bearings
  • Lubrication
  • Numerical Integration

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).