Results 171 to 180 of about 4,058 (217)
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Experimental and Computational Assessment of Windage Losses in Rotating Machinery
Journal of Fluids Engineering, 1996A combined experimental and computational investigation of the flow between a rotating cylinder and a fixed enclosure is presented. The configuration considered is related to the design of a centrifugal desalinator, and includes the flow in the annular as well as in the axial gap regions. The computed flowfield shows significant variations in the axial
P. M. Wild, N. Djilali, G. W. Vickers
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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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Numerical Study of Windage Power Loss for One Salient Pole Hydro Generator
2020 International Conference on Electrical Machines (ICEM), 2020In order to determine the impact of different rotor construction elements on windage losses, computational fluid dynamics study for one salient pole generator is performed. Fully predictive approach was employed to simulate air flow distribution through the machine for three different rotor configurations.
Majer, Siniša, Tuković, Željko
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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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Numerical Investigation on Windage Losses of High-Speed Gears in Enclosed Configuration
AIAA Journal, 2018Increasing efficiency of gearing systems is a key point in developing innovative aeroengines with low specific fuel consumption.
Fondelli, T., Andreini, A., Facchini, B.
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Computational Analysis of Windage Losses in an Epicyclic Gear Train
Volume 5B: Heat Transfer, 2017Aside from increasing the overall engine pressure ratio, current trends in the design of innovative aircraft propulsion systems focus also on improving the propulsive efficiency. In this context, research efforts have been devoted towards the implementation of a new family of Ultra-High Bypass Ratio (up to 20) engines. In order to take into account the
Cosimo Bianchini +3 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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Friction and Windage Losses in Pelton Wheels
2016Friction and windage losses in Pelton wheels arise because the air around the Pelton wheel is continuously entrained to circulate and the rotation of Pelton wheels is persistently resisted by air friction on the wheel surface. These effects are therefore referred to as , and in practical applications, these two types of losses depend on designs of the ...
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Annular Gap Windage Loss Measurements for High Speed Electrical Machinery
Volume 5B: Heat Transfer, 2017Windage loss in small, high speed electrical machinery is often predicted using fairly simple quasi-empirical correlations. Many of the correlations used are primarily based on testing performed with larger test articles, at lower speeds, and often with liquid lubricants. This paper presents a new set of air gap windage loss test data for test articles
Erik E. Swanson +2 more
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