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Investigations on CFD Simulations for Predicting Windage Power Losses in Spur Gears
Journal of Mechanical Design, 2011In this paper, a computational fluid dynamics (CFD) code is applied to two- and three-dimensional simulations of windage power loss generated by spur gears rotating in air. Emphasis is placed on the various meshes associated with the finite volume method and on the choice of turbulence model.
Marchesse, Yann +3 more
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Experimental and Numerical Investigation on Windage Power Losses in High Speed Gears
Volume 5B: Heat Transfer, 2017Enhancing the efficiency of gearing systems is an important topic for the development of future aero-engines with low specific fuel consumption. The transmission system in fact has a direct impact on the engine overall efficiency by means of its weight contribution, internal power losses and lubrication requirements.
Massini, Daniele +5 more
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Influence Factors and Calculating Methods for Gear Windage Power Loss
Applied Mechanics and Materials, 2011Based on making some analyses and comparisons about influence factors and existing calculating methods for gear transmission windage loss, it gives practical area and application situation of these calculating methods in this paper. Also it presents some suggestions on some possible problems when calculation.
Yu Zhu Ge +3 more
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Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, 2023
Energy storage has recently emerged as a topic of discussion in the context of the energy transition away from fossil fuels. The flywheel energy storage system (FESS) is gaining popularity due to its distinct advantages, which include long life cycles,
Mahmoud Eltaweel +1 more
semanticscholar +1 more source
Energy storage has recently emerged as a topic of discussion in the context of the energy transition away from fossil fuels. The flywheel energy storage system (FESS) is gaining popularity due to its distinct advantages, which include long life cycles,
Mahmoud Eltaweel +1 more
semanticscholar +1 more source
SOURCES OF WINDAGE POWER LOSS IN SALIENT POLES HYDROGENERATOR
2017Due to the fact that hydro-generators are primarily electrical machines, traditionally insufficient attention is paid to aerodynamics within the machine. Consequently, the existing analytical methods for windage loss calculations, which in the hydro-generator can participate with more than 30% of total losses, are quite simplified and are based largely
Tuković, Željko, Majer, Siniša
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Windage Loss Models for Enclosed Cylindrical Flows under S-CO2 Condition
Journal of Engineering For Gas Turbines and Power, 2023A supercritical CO2 (S-CO2) Brayton cycle is expected to have high compactness, simple configuration and competitive efficiency. These advantages are originated from CO2 non-ideal gas properties near the critical point, and encourage utilization of the
Dokyum Kim +3 more
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Windage Loss and Flow Characteristics in Back Gap of Radial Inflow Impellers With Steam Medium
Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, 2023The impeller back gap of radial inflow turbines generates disk-type windage loss, and it is necessary to accurately predict and minimize the loss. In this paper, a steady-state numerical analysis for a two-stage radial inflow turbine with steam as ...
Zhuobin Zhao +4 more
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Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
The influence of windage power loss becomes significant when the gears rotating in air-oil mist with high velocities. The windage power loss is resulted from pressure drag and viscosity drag of the fluid in gearbox. Moreover, the viscosity drag is highly
Lin Wang, Zekai Du, Boyuan Zhang, Hao Li
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The influence of windage power loss becomes significant when the gears rotating in air-oil mist with high velocities. The windage power loss is resulted from pressure drag and viscosity drag of the fluid in gearbox. Moreover, the viscosity drag is highly
Lin Wang, Zekai Du, Boyuan Zhang, Hao Li
semanticscholar +1 more source
Preliminary numerical investigations on windage power losses generated by helical gears
2014This paper investigates the windage power loss generated by helical gears rotating in pure air. A three-dimensional approach using computational fluid dynamics (CFD) code which has been validated for spur gear is adapted here in order to consider helix angle.
Voeltzel, Nicolas +4 more
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Numerical prediction of windage power losses for a spur gear in two phase media
Proceeding of THMT-18. Turbulence Heat and Mass Transfer 9 Proceedings of the Ninth International Symposium On Turbulence Heat and Mass Transfer, 2018Windage losses arise due to viscous dissipation of air - oil mist flow driven by the rotating faces, sides of the gears in a gearbox. In the open literature, theoretical investigations mostly focused on the single phase (air) flow. Thus there is research need for the analysis of the windage losses under more realistic conditions.
Yavuz, M. A., Ersan, A. K., Aktas, M. K.
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