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Search: WFRF:(Bohnert Christof)

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1.
  • Maccioni, Lorenzo, et al. (author)
  • Particle Image Velocimetry measurements inside a tapered roller bearing with an outer ring made of sapphire: Design and operation of an innovative test rig
  • 2022
  • In: Tribology International. - : Elsevier BV. - 0301-679X. ; 165
  • Journal article (peer-reviewed)abstract
    • Experimental studies on rolling-element bearing lubrication represent an ambitious engineering challenge. In the present study, the design of a dedicated test rig to perform Particle Image Velocimetry (PIV) measurements on the lubricant inside a tapered roller bearing is presented. Through the usage of a sapphire outer ring, it has been possible to optically access the inside of a bearing without compromising its kinematics. PIV measurements allowed the reconstruction of the lubricant velocity field in the cavity between the cage and the outer ring at different rotational speeds. Results show that as the speed of rotation increases, bubbles due to aeration phenomena tend to appear and modify the behavior of the lubricant considerably.
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2.
  • Maccioni, Lorenzo, et al. (author)
  • Study of the impact of aeration on the lubricant behavior in a tapered roller bearing: Innovative numerical modelling and validation via particle image velocimetry
  • 2022
  • In: Tribology International. - : Elsevier BV. - 0301-679X. ; 165
  • Journal article (peer-reviewed)abstract
    • The air-lubricant interaction causes aeration which influences lubrication mechanisms in rolling-element-bearings. The goal of this paper is to develop a Computational Fluid Dynamics (CFD) model capable to take into consideration aeration. A new solver was implemented in the open-source environment OpenFOAM®. A dip lubricated tapered-roller-bearing was simulated with the new and a standard solver. The numerical predictions were compared with experimental data acquired on a dedicated test rig exploiting Particle Image Velocimetry (PIV). The comparison of the standard predictions and the experimental data for high shaft rotational speeds (higher level of aeration) shows discrepant results. On the other hand, the solver that takes aeration into account leads to results which are comparable to the experimental ones in all rotational ranges investigated via PIV.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Chernoray, Valery, 1 ... (2)
Maccioni, Lorenzo (2)
Concli, Franco (2)
Bohnert, Christof (2)
Mastrone, Marco Nico ... (1)
University
Chalmers University of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Engineering and Technology (2)
Natural sciences (1)
Year
2022 (2)

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