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TECHNICAL PAPERS

Rheological Properties of Polyolester Under an EHD Contact in Some Refrigerant Environments

[+] Author and Article Information
Masayoshi Muraki, Takashi Sano

Lubricants and Specialties Department, Lubricants Research Laboratory, Nippon Mitsubishi Oil Corporation, 8, Chidori-Cho, Naka-Ku, Yokohama, Kanagawa, 231-0815, Japan

Daming Dong

No. 1 Technical Department, Kyodo Yushi Co. LTD, 1-4-1, Tsujido Kandai, Fujisawa, Kanagawa, 251-8588, Japan

J. Tribol 123(1), 54-60 (Jun 30, 2000) (7 pages) doi:10.1115/1.1326443 History: Received November 18, 1999; Revised June 30, 2000
Copyright © 2001 by ASME
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References

Figures

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Main part of EHD tester
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Examples of traction curves
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Viscosity-pressure relation for polyol ester P131
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Dimensionless shear stress profiles in a Hertz contact
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Traction curves in some refrigeration environments. Solid lines are the calculated results by Eq. (10) and symbols are the measured data: (a) at gas pressure of 100 kPa; (b) at gas pressure of 300 kPa.
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Comparison between calculated results and measurements of traction.
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Effective viscosity-pressure coefficient αe versus gas pressure Pg
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Representative stress τO versus gas pressure Pg
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Effective viscosity-pressure coefficient αe versus refrigerant concentration
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Representative stress versus refrigerant concentration
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Viscous volume Vτ versus molecular volume Vm of refrigerant/POE mixture
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Ratio Vτ/Vm versus refrigerant concentration

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