Numerical Thermal Modelling of Multiphase Spray Cooling of Hairpin Windings

Antonino La Rocca, Andrea Fregni, Salvatore La Rocca, Chris Gerada

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

This paper describes the methodology adopted for the numerical thermal modelling of both submerged jets (single phase) and nebulized jets (multi-phase) used for the cooling of hairpin type end-windings. The work highlights the challenges arising when modelling discrete phases using computational fluidynamics (CFD) and proposes a setup for effectively capturing the physics whilst maintaining an acceptable level of computational cost of the simulations involving multi-phase cases. Additionally, a comparison of the cooling performance of the two strategies is carried out by observing the convective phenomena. Indeed, despite the overall lower fluid velocity achieved, the single-phase case shows an heat transfer rate double compared to the spray cooling and more uniform temperature distribution all over the winding surface thanks to the bigger level of penetration through the gaps in between the conductors.

Original languageEnglish
Title of host publicationProceedings - ICOECS 2020
Subtitle of host publication2020 International Conference on Electrotechnical Complexes and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728191157
DOIs
Publication statusPublished - 27 Oct 2020
Externally publishedYes
Event2020 International Conference on Electrotechnical Complexes and Systems, ICOECS 2020 - Ufa, Russian Federation
Duration: 27 Oct 202030 Oct 2020

Publication series

NameProceedings - ICOECS 2020: 2020 International Conference on Electrotechnical Complexes and Systems

Conference

Conference2020 International Conference on Electrotechnical Complexes and Systems, ICOECS 2020
Country/TerritoryRussian Federation
CityUfa
Period27/10/2030/10/20

Keywords

  • CFD
  • Cooling
  • DPM
  • Multi-phase
  • Single-Phase
  • Spray
  • Thermal management

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Instrumentation

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