Discharge coefficients in aerostatic bearings with inherent orifice-type restrictors

S. H. Chang, C. W. Chan, Yeau-Ren Jeng

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In aerostatic bearing analysis, determining film pressure by solving the Reynolds equation in a numerical model is more effective than conducting bearing experiments or performing computational fluid dynamics (CFD) simulations. However, the discharge coefficient of an orifice-type restrictor is generally a given number that dominates model accuracy. This study investigated the influence of geometry and flow parameters on this discharge coefficient. The results indicate that this discharge coefficient is sensitive to the orifice diameter and film thickness and that the effects of the supply pressure, bearing radius, supply orifice length, supply passage diameter, conicity depth, and conicity angle can be disregarded. This study also built a surrogate model of this discharge coefficient based on the orifice diameter and film thickness by using artificial neural networks (ANNs).

Original languageEnglish
Article number011705
JournalJournal of Tribology
Volume137
Issue number1
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

Bearings (structural)
aerostatics
discharge coefficient
orifices
Orifices
Film thickness
film thickness
Reynolds equation
computational fluid dynamics
Numerical models
Computational fluid dynamics
Neural networks
conduction
radii
Geometry
Computer simulation
geometry
simulation
Experiments

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

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Discharge coefficients in aerostatic bearings with inherent orifice-type restrictors. / Chang, S. H.; Chan, C. W.; Jeng, Yeau-Ren.

In: Journal of Tribology, Vol. 137, No. 1, 011705, 01.01.2015.

Research output: Contribution to journalArticle

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