Jet cooling characteristics for ball bearings using the VOF multiphase model

Wu, Wei; Hu, Chenhui; Hu, Jibin; Yuan, Shuai; Zhang, Ran

doi:10.1016/j.ijthermalsci.2017.02.014

Cited by 45 publications

(27 citation statements)

References 14 publications

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“…To track the interface between two immiscible fluids (oil and air), the VOF multiphase model presented by Hirt and Nichols [19] was applied herein. Several scholars [10][11][12][13][16][17][18] have used the VOF model to study the coexistence of oil and air phases. This is accomplished by solving the continuity equation of the volume fraction of the oil phase:…”

Section: Numerical Setup 41 Volume Of Fluid (Vof) Multiphase Model mentioning

confidence: 99%

“…The k-ε renormalization group (RNG) turbulence model can better replicate the high strain rate and large deformation flow and is suitable for rotating flow [21]. Many scholars [10,11,[15][16][17][18]22] have adopted the RNG k-ε model to study the fluid flow characteristics in a gearbox or in a bearing cavity, and the simulation results are credible. Consequently, the RNG k-ε model developed by Orzag and Yakhot [23] was employed herein to simulate the turbulence.…”

Section: Numerical Setup 41 Volume Of Fluid (Vof) Multiphase Model mentioning

confidence: 99%

“…Chen and Liu [27] used a multi-reference coordinate system to simulate the movement of gears with oil-injected lubrication and obtained the heat transfer law of an accessory gearbox. Numerous other studies have also used the MRF model [15,17,18]. However, these studies have primarily focused on oil-injected lubrication, and the MRF method has not yet been applied to splash lubrication, especially for complex models such as an intermediate gearbox.…”

Section: Multiple Reference Frames (Mrf) Modelmentioning

confidence: 99%

“…The temperature characteristics of the bearing are largely related to the lubrication effect, and the lubrication and cooling laws of the bearing are different for different lubrication modes. Most existing research on the lubrication and temperature characteristics of bearings are focused on oil injection lubrication [16][17][18] and under-race lubrication [22]. In this study, we used bearing 1 as an example to clarify the lubrication and temperature characteristics of bearings with splash lubrication.…”

Section: Lubrication and Temperature Characteristics Of Bearingsmentioning

confidence: 99%

“…Thus, the uneven distribution of air and oil must be considered when analyzing the heat transfer in oil-injected lubricated ball bearings. Wu et al [17,18] investigated the flow and heat transfer characteristics of ball bearings with oil jet lubrication using CFD. They concluded that the bearing temperature was lower in areas with more oil.…”

Section: Introductionmentioning

confidence: 99%

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CFD-Based Investigation of Lubrication and Temperature Characteristics of an Intermediate Gearbox with Splash Lubrication

Wang

Wei

et al. 2020

Applied Sciences

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In this study, we propose a computational fluid dynamics (CFD)-based method to study the lubrication and temperature characteristics of an intermediate gearbox with splash lubrication. A volume of fluid (VOF) multiphase model was used to track the interface between oil and air. A multiple reference frame (MRF) model was adopted to accurately simulate the movement characteristics of the gears, bearings, and the surrounding flow field. The thermal-fluid coupling computational model of an intermediate gearbox with splash lubrication was then established. Combined with experimental results, we verified that the lubricating oil temperature was below the limit requirement (<110 °C). The numerical results revealed that large amounts of lubricating oil were splashed onto the tooth surfaces near the gear meshing area. A large convective heat transfer coefficient corresponds to a low gear tooth surface temperature. The tooth surface temperature of the driving gear is higher than that of the driven gear. The distribution law of oil volume fraction of the bearing roller was jointly affected by the roller rotation direction and gravity. The convective heat transfer coefficient of the roller wall was largely related to the lubrication environment of the roller, including the oil distribution inside the bearing cavity and the flow rate.

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