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ISSN Печать: 1940-2503
ISSN Онлайн: 1940-2554
Indexed in
DEVELOPMENT AND VALIDATION OF THE 3D TEMPERATURE FIELD SIMULATION FOR THE TILTING PAD JOURNAL BEARINGS
Краткое описание
When it comes to prediction of the journal bearing performances, computational fluid dynamics (CFD) has been considered as a well-established method, which is much commonly used nowadays. Moreover, valuable outcomes, and even breaking through, can be expected when introducing CFD into the analysis of tilting pad journal bearings (TPJBs). This paper aims to apply this new 3D CFD method in TPJB thermal performance prediction. Completed in FLUENT, the present simulations have taken various thermal factors into consideration, including the lubricant properties changing with temperature variations and the conjugate heat transfer from the oil to the pads. In the transient calculations, a valid dynamic mesh algorithm was developed to cope with mesh updating in the paper-thin oil film area. The results generated from the simulations were verified by experimental measurements in other literature. Particularly, pad surface temperatures obtained from the simulations indicate a more accurate temperature distribution prediction than the traditional 2D Reynolds equation method. In addition, according to the calculations on flow fields carried out at different positions of the shaft center, the findings indicate that the changes in thickness of the oil film on the loaded pads lead to significant variations in maximum bearing temperature. In summary, the 3D CFD method, with better accuracy and more flow-field details available, ensures a more effective and efficient way of TPJB thermal performance prediction.
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