This study deals with a comparison between new experiments on the frictional behavior of porous journal bearings and its prediction by previous numerical simulations. The tests were carried out on bearings lubricated with polyalphaolefin (PAO)-based oils of distinct viscosities. The theoretical model underlying the simulations includes the effects of cavitation by vaporization and accounts for the sinter flow by virtue of Darcy's law. The effective eccentricity ratio corresponding to the experimentally imposed load is estimated by an accurate numerical interpolation scheme. The comparison focuses on the hydrodynamic branches of the Stribeck curve by dimensional analysis (DA), where the variations of the lubricant viscosity with temperature are of main interest. The numerically calculated values of the coefficient of friction are found to reproduce the experimentally obtained ones satisfactorily well in terms of overall trends; yet, the former lie predominantly below the measured ones, which results in a low-positive correlation between the two.
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July 2016
Research-Article
Experimental Validation of the Simulated Steady-State Behavior of Porous Journal Bearings1
Bernhard Scheichl,
Bernhard Scheichl
Institute of Fluid Mechanics and Heat Transfer,
Vienna University of Technology,
Vienna 1060, Austria;
Vienna University of Technology,
Vienna 1060, Austria;
AC2T research GmbH,
Wiener Neustadt 2700, Austria
Wiener Neustadt 2700, Austria
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Georg Vorlaufer,
Georg Vorlaufer
AC2T research GmbH,
Wiener Neustadt 2700, Austria
Wiener Neustadt 2700, Austria
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Stefan J. Eder,
Stefan J. Eder
AC2T research GmbH,
Wiener Neustadt 2700, Austria
Wiener Neustadt 2700, Austria
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Friedrich Franek,
Friedrich Franek
AC2T research GmbH,
Wiener Neustadt 2700, Austria;
Wiener Neustadt 2700, Austria;
Institute for Sensor and Actuator Systems,
Vienna University of Technology,
Vienna 1040, Austria
Vienna University of Technology,
Vienna 1040, Austria
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Lutz Ramonat
Lutz Ramonat
ebm-papst St. Georgen GmbH & Co.KG,
St. Georgen 78112, Germany
St. Georgen 78112, Germany
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Ioana Adina Neacşu
Bernhard Scheichl
Institute of Fluid Mechanics and Heat Transfer,
Vienna University of Technology,
Vienna 1060, Austria;
Vienna University of Technology,
Vienna 1060, Austria;
AC2T research GmbH,
Wiener Neustadt 2700, Austria
Wiener Neustadt 2700, Austria
Georg Vorlaufer
AC2T research GmbH,
Wiener Neustadt 2700, Austria
Wiener Neustadt 2700, Austria
Stefan J. Eder
AC2T research GmbH,
Wiener Neustadt 2700, Austria
Wiener Neustadt 2700, Austria
Friedrich Franek
AC2T research GmbH,
Wiener Neustadt 2700, Austria;
Wiener Neustadt 2700, Austria;
Institute for Sensor and Actuator Systems,
Vienna University of Technology,
Vienna 1040, Austria
Vienna University of Technology,
Vienna 1040, Austria
Lutz Ramonat
ebm-papst St. Georgen GmbH & Co.KG,
St. Georgen 78112, Germany
St. Georgen 78112, Germany
2Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received August 24, 2015; final manuscript received January 7, 2016; published online April 27, 2016. Assoc. Editor: Joichi Sugimura.
J. Tribol. Jul 2016, 138(3): 031703 (11 pages)
Published Online: April 27, 2016
Article history
Received:
August 24, 2015
Revised:
January 7, 2016
Citation
Neacşu, I. A., Scheichl, B., Vorlaufer, G., Eder, S. J., Franek, F., and Ramonat, L. (April 27, 2016). "Experimental Validation of the Simulated Steady-State Behavior of Porous Journal Bearings." ASME. J. Tribol. July 2016; 138(3): 031703. https://doi.org/10.1115/1.4032659
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