Abstract
Increasing numbers of under-hood sensors and power electronics modules are becoming standard in both commercial and military vehicles. In order to function reliably, these technologies require a dedicated and dynamic cooling system, such as liquid jet impingement. In a jet array, the spent fluid from upstream jets interact with the downstream jets degrading their performance. In this study, in order to counteract this effect, an expanding manifold, with larger area for flow downstream, was used to allow the spent fluid from upstream jets to be diverted, reducing degradation of the heat transfer coefficients downstream. A numerical study of liquid jet impingement utilizing water as the working fluid was performed to examine the heat transfer rate in staggered jet arrays compared to inline jet arrays. The simulations performed examined manifold angles between 0 and 10 degrees, jet Reynolds numbers between 5600 and 14000, and pitches of 2.5, 3, 4.5, and 6 nozzle diameters. The simulations revealed details of the complicated interaction between the jets, their fountain regions and the crossflow. The angled manifold systems had greater temperature uniformity and increased heat transfer coefficients compared to systems with constant area manifolds.
Original language | English |
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Title of host publication | Proceedings of the 17th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2018 |
Pages | 417-423 |
Number of pages | 7 |
ISBN (Electronic) | 9781538612729 |
DOIs | |
State | Published - Jul 24 2018 |
Event | 17th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2018 - San Diego, United States Duration: May 29 2018 → Jun 1 2018 |
Publication series
Name | Proceedings of the 17th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2018 |
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Conference
Conference | 17th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2018 |
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Country/Territory | United States |
City | San Diego |
Period | 5/29/18 → 6/1/18 |
Bibliographical note
Publisher Copyright:© 2018 IEEE.
Keywords
- Staggered jet array
- angled expanding manifold
- fountain region effects
- jet impingement
- spent flow management
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Electrical and Electronic Engineering
- Mechanics of Materials
- Safety, Risk, Reliability and Quality