CFD-based Estimation of Air-gap Windage Losses in High-speed Machines with Axial Flow

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0199439" target="_blank" >RIV/00216305:26220/26:0199439 - isvavai.cz</a>
Result on the web
<a href="https://ieeexplore.ieee.org/document/11239013" target="_blank" >https://ieeexplore.ieee.org/document/11239013</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/ECCE-Europe62795.2025.11239013" target="_blank" >10.1109/ECCE-Europe62795.2025.11239013</a>

Result language
angličtina
Original language name
CFD-based Estimation of Air-gap Windage Losses in High-speed Machines with Axial Flow
Original language description
This paper focusses on an examination of air-gap windage losses in high-speed motors with a radial cooling duct, emphasising the effects of axial flow and model geometry. Windage losses are estimated using existing empirical correlations, revealing their limitations in systems with axial flow and slotted geometries. Two computational fluid dynamics (CFD) air-gap models are introduced: a detailed CFD air-gap model featuring stator and rotor slotting and a simplified intermediary annular CFD air-gap model. These CFD air-gap models simulate windage losses at different axial flow velocities and rotor speeds. A high-speed solid slitted rotor induction motor with a radial cooling duct is used as a case study. The detailed CFD air-gap model exhibits high precision in predicting wall shear stress with axial flow. Although the simplified CFD air-gap model provides acceptable estimates, this model does not adequately address localised effects and asymmetries due to geometrical complexities present in the actual air-gap configuration. The results highlight the necessity for advanced modelling techniques in the design of efficient high-speed electrical machines, where mechanical losses and thermal management are of crucial importance.
Czech name
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Czech description
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Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
2025 Energy Conversion Congress & Expo Europe (ECCE Europe)
ISBN
979-8-3315-6752-1
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
1-6
Publisher name
IEEE
Place of publication
Birmingham, United Kingdom
Event location
Birmingham, United Kingdom
Event date
Sep 1, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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