Mathematical modeling and numerical simulation for determining an optimized oil jet layout for spiral bevel gear lubrication

Zhu, Xiang; Dai, Yu; Ouyang, Bin

doi:10.1177/1350650120942329

Cited by 13 publications

(8 citation statements)

References 40 publications

(48 reference statements)

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“…They also conducted experiments to validate the theoretical depth models and pointed out that an optimal oil nozzle layout can provide a maximum impingement depth, bringing better cooling effect. Similar studies were submitted by Dai et al; they investigated not only the penetrating depth on spur/helical gear pairs [16], but also spiral bevel gears [17] and face gears [18]. These scholars emphasized the relationship between the nozzle layout and the theoretical impingement, but neglected the resistance torque or the impulse power losses due to the action of oil flow impacting the gear surface.…”

Section: Introductionmentioning

confidence: 72%

Numerical Analysis for Wetting Behaviors of an Oil Jet Lubricated Spur Gear

et al. 2022

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As it is widely employed in the aeronautical transmission system, a better understanding of the oil jet lubrication behavior is vital to determine the total system energy consumption. Firstly, this study presents related theoretical models such as the sum of oil jet resistance torque, impingement depth, and wetted area of the oil film for calibrating the physical characteristics of the impact of the oil jet on the gear flank. Then, in terms of the flow phenomenology of the liquid column for the oil jet impact on an isolated spur gear, a detailed transient and spatial flow field analysis becomes available, benefiting from an overset mesh method integrating with a volume-of-fluid (VOF) method. Furthermore, not only the oil jet resistance torque, but also the impingement depth as well as the spatial and temporal evolution of wetted surface by the oil film on the gear tooth given by numerical investigations were compared well with the theoretical calculations.

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Section: Introductionmentioning

confidence: 72%

Numerical Analysis for Wetting Behaviors of an Oil Jet Lubricated Spur Gear

et al. 2022

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“…Other researchers [5,6] have come up with similar results validating through experiments that the nozzle location affects the oil-air ratio and total pressure. On this basis, the complex impingement depth model is extended for the face gear and spiral bevel gear [32][33][34]. However, the aforementioned literature determined the nozzle layouts judged by the oil-air ratio and total pressure which are hard to measure directly through an indirect method.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nozzle Layouts on the Heat-Flow Coupled Characteristics for Oil-Jet Lubricated Spur Gears

Yang

Zhong

et al. 2023

Lubricants

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Aiming to explore the influence of nozzle layouts on the lubrication and cooling performance of spur gears under oil jet lubrication conditions, this paper introduces a heat-flow coupled analysis method to predict the temperature field of the tooth surface with different nozzle layouts. Firstly, the friction heat formulas integrating the coefficient of friction and average contact stress are presented for calculating heat generation. We also present the impingement depth model, which considers the nozzle orientation parameters, jet velocity, and gear structure of the given spur gear pair for laying out the nozzle. Then, a heat-flow coupled finite element analysis method is exploited to resemble the jet lubrication process and gain the gear temperature characteristics. Finally, the numerical results of this model compare well with those of the experiments, showing that this heat-flow coupled model provides accurate temperature prediction, indicating that the nozzle layouts determined as a function of the oil jet height, deviation distance, and oil injection angle significantly influence the lubrication and cooling performance. Further, this study also reveals that the lubrication performance in cases where the nozzle approaches the side of the pinion is relatively superior.

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“…The computational fluid dynamics (CFD) method is always widely used to visually understand the fluid flow in real case studies. [10][11][12][13][14][15] Under oil jet lubrication, oil liquid is sprayed from the nozzle exit into the air and finally reaches the lubrication areas of target parts. Clearly, the oil jet lubrication process belongs to a typical liquid-gas two-phase flow behavior.…”

Section: Introductionmentioning

confidence: 99%

CFD investigation of air-oil two-phase flow in oil jet nozzle

Zhong

Dai

Liang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In aero-engines applications, nozzle geometric parameters have major effects on the lubricating oil to accurately reach target gears or bearings. To investigate the deviation phenomenon of oil jet flow in the lubrication system, the computational fluid dynamics (CFD) technique integrating with the volume of fluid (VOF) method and SST k- ω turbulence model is adopted to deeply understand the flow characteristics of the nozzle. By leveraging this method, the relationship between nozzle geometry, inlet pressure, jet velocity, and jet deviation are firstly analyzed. The results reveal that a higher average velocity and smaller jet deviation can be determined via adjusting the nozzle geometry. Furthermore, a specific test rig, composed of an oil supply system, target system and data collection system, is set up for oil injection test; experimental outlet velocity and mass flow rate of oil passing through the hole on the target plate are monitored and recorded. The experimental findings compare well with numerical results obtained by the CFD method.

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Mathematical modeling and numerical simulation for determining an optimized oil jet layout for spiral bevel gear lubrication

Cited by 13 publications

References 40 publications

Numerical Analysis for Wetting Behaviors of an Oil Jet Lubricated Spur Gear

Numerical Analysis for Wetting Behaviors of an Oil Jet Lubricated Spur Gear

Influence of Nozzle Layouts on the Heat-Flow Coupled Characteristics for Oil-Jet Lubricated Spur Gears

CFD investigation of air-oil two-phase flow in oil jet nozzle

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