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Two-Way Coupled CFD Approach for Predicting Gear Temperature of Oil Jet Lubricated Transmissions
Journal Article
02-11-03-0013
ISSN: 1946-391X, e-ISSN: 1946-3928
Sector:
Citation:
Deshpande, S., Joshi, H., Madhavan, J., Mason, P. et al., "Two-Way Coupled CFD Approach for Predicting Gear Temperature of Oil Jet Lubricated Transmissions," SAE Int. J. Commer. Veh. 11(3):163-170, 2018, https://doi.org/10.4271/02-11-03-0013.
Language:
English
Abstract:
This article focuses on the development of a two-way coupled methodology to
predict gear temperature of oil jet lubricated transmissions using commercial
software for computational fluid dynamics simulation. The proposed methodology
applies an overset mesh technique to model the gear interlocking motion,
multiphase of air-oil mixture, and heat transfer. Two gear pairs were used to
develop and validate the methodology, an overdrive helical gear pair of a
commercial vehicle transmission and a standard spur gear pair. Different oil jet
lubrication methods were investigated using the proposed methodology, such as
oil jet directed at the into-mesh position and at the out-of-mesh position. This
investigation showed that out of mesh lubrication direction shows better cooling
performance which is in well agreement with previous studies of literature. Gear
temperature was measured on the spur gears under several operating conditions by
a set of thermocouples placed near the tooth contacting surface and 180 degree
apart. A good correlation of predictions and measurement results were obtained
for all cases within 12 °C of maximum deviation. The proposed two-way coupled
CFD approach can be used to develop oil jet lubrication systems for effective
gear cooling and reduced power loss.