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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2025 Energy Conversion Congress & Expo Europe (ECCE Europe)

ISBN

979-8-3315-6752-1

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

IEEE

Místo vydání

Birmingham, United Kingdom

Místo konání akce

Birmingham, United Kingdom

Datum konání akce

1. 9. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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