dc.contributor.author | ROBINSON, ANTHONY | |
dc.date.accessioned | 2009-08-31T12:33:53Z | |
dc.date.available | 2009-08-31T12:33:53Z | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009 | en |
dc.identifier.citation | Brian P. Whelan, Anthony J. Robinson 'Nozzle geometry effects in liquid jet array impingement' in Applied Thermal Engineering, 29, (11-12), 2009, pp 2211 - 2221 | en |
dc.identifier.other | Y | |
dc.identifier.other | Y | en |
dc.identifier.uri | http://hdl.handle.net/2262/31948 | |
dc.description | PUBLISHED | en |
dc.description.abstract | The use of impinging liquid jets in electronics thermal management is attracting some
consideration due to their very high heat transfer coefficients, hot spot targeting capabilities and
moderate hydraulic power requirements. In this investigation an experimental study of the cooling
capabilities of impinging water jet arrays is presented. Of particular interest here is the influence
that the inlet and outlet geometries have on the thermal-hydraulics of jet impingement heat transfer
with the aim of determining practical configurations in which heat transfer to the impinging jets is
increased and/or the hydraulic pumping power is decreased. For a square array of 45 jets of fixed
1.0 mm diameter and fixed interjet spacing of 5 mm, six different nozzle geometries were
investigated. The arrays impinged normally upon a heated circular copper surface of 31.5 mm
diameter for a nominal heat flux of 25.66 W/cm2. Each array was tested under confined-submerged
flow conditions with a constant jet-to-target spacing of 2.0 mm as well as free-surface conditions
with a constant jet-to-target spacing of 20 mm. All nozzles were tested for a Reynolds number
range of approximately 800 ? Redn ? 10000. It has been found that the confined-submerged tests
yield greater heat transfer coefficients compared with their free jet counterparts. Chamfering and
contouring the nozzle inlets showed significant decrease in the pressure drop across the nozzle
plate whilst chamfering and contouring the exit showed moderate gains in the surface averaged
heat transfer coefficient. Nozzles that provide the highest heat transfer for a given hydraulic
pumping power are identified for each free-surface and confined-submerged scenarios. | en |
dc.description.sponsorship | This work was supported by the CTVR, a CSET of Science Foundation Ireland.
Particular gratitude is extended to Bell Laboratories Ireland. | en |
dc.format.extent | 2211 | en |
dc.format.extent | 2221 | en |
dc.format.extent | 617478 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | en |
dc.publisher | Elsevier | en |
dc.relation.ispartofseries | Applied Thermal Engineering | en |
dc.relation.ispartofseries | 29 | en |
dc.relation.ispartofseries | 11-12 | en |
dc.rights | Y | en |
dc.subject | Mechanical & Manufacturing Engineering | en |
dc.title | Nozzle Geometry Effects in Liquid Jet Array Impingement | en |
dc.type | Journal Article | en |
dc.contributor.sponsor | Science Foundation Ireland | |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/arobins | |
dc.identifier.rssuri | http://dx.doi.org/10.1016/j.applthermaleng.2008.11.003 | |