dc.contributor.author | Rozli, Zulkifli | |
dc.contributor.author | Kamaruzzaman, Sopian | |
dc.date.accessioned | 2011-09-14T08:55:39Z | |
dc.date.available | 2011-09-14T08:55:39Z | |
dc.date.issued | 2006-09 | |
dc.identifier.citation | The Journal of the Institution of Engineers, Malaysia, vol. 67(3), 2006, pages 47-53 | en_US |
dc.identifier.issn | 0126-513X | |
dc.identifier.uri | http://myiem.org.my/content/iem_journal_2006-177.aspx | |
dc.identifier.uri | http://dspace.unimap.edu.my/123456789/13744 | |
dc.description | Link to publisher's homepage at http://www.myiem.org.my/ | en_US |
dc.description.abstract | 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. | en_US |
dc.language.iso | en | en_US |
dc.publisher | The Institution of Engineers, Malaysia | en_US |
dc.subject | Flow structures | en_US |
dc.subject | Heat flux | en_US |
dc.subject | Pulsating frequency | en_US |
dc.subject | Pulse jet | en_US |
dc.subject | Turbulence intensity | en_US |
dc.title | Pulsating circular air jet impingement heat transfer | en_US |
dc.type | Article | en_US |
dc.contributor.url | rozli@vlsi.eng.ukm.my | en_US |