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Pulsating circular air jet impingement heat transfer

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Main Authors: Rozli, Zulkifli, Kamaruzzaman, Sopian
Other Authors: rozli@vlsi.eng.ukm.my
Format: Article
Language:English
Published: The Institution of Engineers, Malaysia 2011
Subjects:
Flow structures
Heat flux
Pulsating frequency
Pulse jet
Turbulence intensity
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/13744
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spelling my.unimap-137442011-09-14T08:55:39Z Pulsating circular air jet impingement heat transfer Rozli, Zulkifli Kamaruzzaman, Sopian rozli@vlsi.eng.ukm.my Flow structures Heat flux Pulsating frequency Pulse jet Turbulence intensity Link to publisher's homepage at http://www.myiem.org.my/ The purpose of this study is to determine the effect of pulsating frequencies on the local and average heat transfer characteristics of a heated circular air jet. Pulsation of the air jet was produced by a rotating cylinder valve mechanism at frequencies between 10 to 80 Hz. Flow stru c t u res of the heated steady and pulse single circular axisymmetric air jet velocity are measured using a calibrated hot-wire anemometer and presented in non-dimensionalized form. Reynolds number was set at 16 000, 23 300 and 32 000. The heat flux of the heated air jet impinging on the plate was measured using a heat flux sensor at different radial positions. Results obtained show that the average pulsed jet Nusselt number was higher than the average steady jet Nusselt number for all values of frequencies due to the higher localised heat transfer of the pulsing jet. This was the result of enhanced turbulence intensity due to pulsing the jet. The stagnation point heat transfer of the pulsed jet obtained was lower for the same fre q u e n c y range due to the small turbulent intensity at this position. 2011-09-14T08:55:39Z 2011-09-14T08:55:39Z 2006-09 Article The Journal of the Institution of Engineers, Malaysia, vol. 67(3), 2006, pages 47-53 0126-513X http://myiem.org.my/content/iem_journal_2006-177.aspx http://hdl.handle.net/123456789/13744 en The Institution of Engineers, Malaysia
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Flow structures
Heat flux
Pulsating frequency
Pulse jet
Turbulence intensity
spellingShingle Flow structures
Heat flux
Pulsating frequency
Pulse jet
Turbulence intensity
Rozli, Zulkifli
Kamaruzzaman, Sopian
Pulsating circular air jet impingement heat transfer
description Link to publisher's homepage at http://www.myiem.org.my/
author2 rozli@vlsi.eng.ukm.my
author_facet rozli@vlsi.eng.ukm.my
Rozli, Zulkifli
Kamaruzzaman, Sopian
format Article
author Rozli, Zulkifli
Kamaruzzaman, Sopian
author_sort Rozli, Zulkifli
title Pulsating circular air jet impingement heat transfer
title_short Pulsating circular air jet impingement heat transfer
title_full Pulsating circular air jet impingement heat transfer
title_fullStr Pulsating circular air jet impingement heat transfer
title_full_unstemmed Pulsating circular air jet impingement heat transfer
title_sort pulsating circular air jet impingement heat transfer
publisher The Institution of Engineers, Malaysia
publishDate 2011
url http://dspace.unimap.edu.my/xmlui/handle/123456789/13744
_version_ 1643790924808978432
score 13.211869

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