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An experimental investigation of windage and oil churning power losses of gears and discs
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2022This study presents comparable sets of churning and windage power loss measurements of a gear. Measurements are performed under windage (air only) and churning (immersion in oil up to a certain level) to quantify load-independent power losses of a family
M. Handschuh, A. Guner, A. Kahraman
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Experimental Investigation Into Windage Power Loss From a Shrouded Spiral Bevel Gear
Volume 6: Turbo Expo 2007, Parts A and B, 2007In some aero-engine applications a spiral bevel gear is mounted in a bearing chamber. The windage power losses (WPL) associated with the gear make a significant contribution to the overall heat generation within the bearing chamber and a potential method of WPL reduction and lubrication/cooling oil management is to shroud the gear. At the University of
G. Johnson, K. Simmons, C. Foord
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A method of reducing windage power loss of a high-Speed motor using a viscous vacuum pump
Precision Engineering, 2017Abstract A new structure for reducing the windage power loss of a high-speed rotor using a spiral grooved viscous vacuum pump combined with an aerodynamic step thrust bearing is proposed. The proposed structure can pump out the air from within the sealed space of the motor housing by using the pumping effect of the spiral grooves and thereby reduce ...
F. Asami +4 more
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Windage Power Loss Modeling of a Smooth Rotor Supported by Homopolar Active Magnetic Bearings
Journal of Tribology, 2008Rotors supported by active magnetic bearings (AMBs) can spin at high surface speeds with relatively low power losses. This makes them particularly attractive for use in flywheels for energy storage in applications such as electric vehicles and uninterruptible power supplies.
M. Raymond, M. Kasarda, P. Allaire
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Effect of Pressure and Oil Mist on Windage Power Loss of a Shrouded Spiral Bevel Gear
Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Wind Turbine Technology, 2012In many aeroengines the accessory power offtake is achieved using a spiral bevel gear set running off one of the main shafts. The crown and bevel gears are housed in an internal gearbox and there is significant heat generation within this chamber, some of which is attributed to windage power loss (WPL) generated by the gear. Over the past few years the
K. Simmons +2 more
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The Application of CFD to Model Windage Power Loss From a Spiral Bevel Gear
Volume 6: Turbo Expo 2007, Parts A and B, 2007In some aero-engine applications a spiral bevel gear is mounted in a bearing chamber. The bearings and gears create a highly rotating, turbulent and chaotic flow field within the chamber. In this paper a single-phase computational study of the flow around a spiral bevel gear is presented and the data is compared to available experimental data.
Steve Rapley, C. Eastwick, K. Simmons
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Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, 2023
This paper proposes a method for calculating windage power losses of spiral bevel gears by dividing the losses into the sum of windage effects on tooth surface, toe/heel, conical surface, and circumferential surface, according to the gear structure.
Linlin Li, S. Wang
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This paper proposes a method for calculating windage power losses of spiral bevel gears by dividing the losses into the sum of windage effects on tooth surface, toe/heel, conical surface, and circumferential surface, according to the gear structure.
Linlin Li, S. Wang
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Tribology Transactions, 2023
With the increasing rotating speed of aviation spiral bevel gears, the load-independent windage power loss caused by hydrodynamic behavior has a greater impact on transmission efficiency.
Linlin Li, Sanmin Wang
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With the increasing rotating speed of aviation spiral bevel gears, the load-independent windage power loss caused by hydrodynamic behavior has a greater impact on transmission efficiency.
Linlin Li, Sanmin Wang
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Mechanism and reduction of windage power losses for high speed herringbone gear
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2022With the objective of reducing windage power losses (WPL) in herringbone gears, WPL experiments involving the use of a shroud are conducted. Based on computational fluid dynamics (CFD), a herringbone gear numerical model is established. Based on the renormalization group (RNG) k–ε two-equation turbulence model and dynamic mesh technique, the features ...
Kun Wei +3 more
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Windage Power Loss of High-Speed Generators
Advanced Energy Systems, 1997Abstract Direct-drive electromachines that are designed to operate at higher rotating speeds will have a windage drag that is a more significant loss factor; this loss will require greater attention in the initial machine design. Switched-reluctance machines with poled rotors can further increase windage by fluid pumping and mixing ...
Edward B. Durkin, John J. Schauer
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