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Open AccessArticle

Thermal Turbulent Flow in Leading Edge Grooved and Conventional Tilting Pad Journal Bearing Segments—A Comparative Study

Division of Machine Elements, Luleå University of Technology, 971 87 Luleå, Sweden
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Lubricants 2018, 6(4), 97; https://doi.org/10.3390/lubricants6040097
Received: 1 August 2018 / Revised: 16 October 2018 / Accepted: 24 October 2018 / Published: 2 November 2018
(This article belongs to the Special Issue Multiphysics and Multiscale Models of Tribology)
A comparative study between a conventional- and leading edge grooved (LEG) tilting pad journal bearing (TPJB) segment is performed. The developed model uses the Shear Stress Transport (SST) turbulence model, coupled with the energy equation and a partial differential equation for the fluid domain mesh displacement to predict the thermal flow characteristics. Instead of using an effective boundary condition to determine the inlet temperature of the LEG pad and excluding the additional LEG portion, as is common practice, the whole geometry of the LEG is modeled. Several sizes of the LEG portion is investigated and it is shown to have quite a small influence on pressure, temperature, film thickness and turbulence intensity. Moreover, the results also show that the conventional pad gives rise to higher levels of turbulence in the mid plane compared to its LEG counterpart, while the latter has a marginally higher value of turbulence when the volume average value is computed. The maximum value of turbulence is however present in the conventional model. View Full-Text
Keywords: tilting pad journal bearing; leading edge groove; turbulence; thermal flow; hydrodynamics; lubrication tilting pad journal bearing; leading edge groove; turbulence; thermal flow; hydrodynamics; lubrication
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MDPI and ACS Style

Croné, P.; Almqvist, A.; Larsson, R. Thermal Turbulent Flow in Leading Edge Grooved and Conventional Tilting Pad Journal Bearing Segments—A Comparative Study. Lubricants 2018, 6, 97.

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