Detail publikace

A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios

HOOKE, CH. ŠPERKA, P. BAIR, S. MORALES-ESPEJEL, G.E.

Anglický název

A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

The behaviour of elastohydrodynamic contacts at high slide-roll ratios (SRR) differs markedly from that found in rolling conjunctions and at low SRRs. Behaviour is dominated by viscosity reduction due to shear-thinning and by temperature rises in the fluid and mating surfaces. These have a major influence on both the performance of smooth contacts and the behaviour of rough surfaces. This paper presents a set of experimental results for these conditions where artificial roughness in the form of transverse ridges is present. These are then compared to the results of a perturbation analysis to see whether this rapid analysis technique can adequately predict the behaviour. It is shown that very powerful feedback mechanisms exist in both the thermal and shear thinning and that these make the behaviour of surface roughness relatively insensitive to changes in fluid properties. In contrast to most previous work, real temperature, pressure and shear dependences of viscosity as measured in viscometers have been employed.

Anglický abstrakt

The behaviour of elastohydrodynamic contacts at high slide-roll ratios (SRR) differs markedly from that found in rolling conjunctions and at low SRRs. Behaviour is dominated by viscosity reduction due to shear-thinning and by temperature rises in the fluid and mating surfaces. These have a major influence on both the performance of smooth contacts and the behaviour of rough surfaces. This paper presents a set of experimental results for these conditions where artificial roughness in the form of transverse ridges is present. These are then compared to the results of a perturbation analysis to see whether this rapid analysis technique can adequately predict the behaviour. It is shown that very powerful feedback mechanisms exist in both the thermal and shear thinning and that these make the behaviour of surface roughness relatively insensitive to changes in fluid properties. In contrast to most previous work, real temperature, pressure and shear dependences of viscosity as measured in viscometers have been employed.

Klíčová slova anglicky

Thermal EHL; shear thinning; surface roughness; perturbation analysis

Vydáno

01.04.2021

Nakladatel

SAGE PUBLICATIONS LTD

Místo

LONDON

ISSN

1350-6501

Ročník

235

Číslo

4

Strany od–do

870–880

Počet stran

11

BIBTEX


@article{BUT169792,
  author="Petr {Šperka},
  title="A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios",
  year="2021",
  volume="235",
  number="4",
  month="April",
  pages="870--880",
  publisher="SAGE PUBLICATIONS LTD",
  address="LONDON",
  issn="1350-6501"
}