CFD Analysis on the Heat Dissipation of a Dry-Lubricated Gear Stage
| Autor: | Lucas Hildebrand, Florian Dangl, Constantin Paschold, Thomas Lohner, Karsten Stahl |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Applied Sciences, Vol 12, Iss 20, p 10386 (2022) |
| Druh dokumentu: | article |
| ISSN: | 2076-3417 79870058 |
| DOI: | 10.3390/app122010386 |
| Popis: | Power losses in gearboxes result in frictional heating. Sufficient heat transfer from the gearbox to the environment is required for reliable operation. The heat dissipation from gears is linked to their interaction with fluids in the gearbox. Recent research has demonstrated the use of Computational Fluid Dynamics (CFD) to predict the gearbox fluid flow and no-load losses in an isothermal manner. This study focuses on a numerical analysis of the heat dissipation within a dry-lubricated gearbox under atmospheric conditions. Spur gears and helical gears are investigated. The air flow in the gearbox as well as the heat dissipation over the gear surfaces are evaluated in detail. The results show that the gear geometry and the circumferential speed have a strong impact on the air flow. Especially, the axial inflow of air to the gears has a great influence on the heat dissipation. Conveying effects of helical gears lead to a multidirectional airflow, resulting in higher values of the heat transfer coefficient on the gear surface compared to spur gears. |
| Databáze: | Directory of Open Access Journals |
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