Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting

In this paper, the forced convective heat transfer performances of heat sinks produced by Selective Laser Melting (SLM) were experimentally investigated. In total, three staggered array heat sinks were fabricated by SLM of aluminium alloy AlSi10Mg powders in Future of Manufacturing Lab 1, Singapore...

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Main Authors: Wong, Kin Keong, Ho, Jin Yao, Leong, Kai Choong, Wong, Teck Neng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Conference or Workshop Item
Language:English
Published: 2016
Online Access:https://hdl.handle.net/10356/84588
http://hdl.handle.net/10220/41853
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-845882020-09-24T20:14:02Z Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting Wong, Kin Keong Ho, Jin Yao Leong, Kai Choong Wong, Teck Neng School of Mechanical and Aerospace Engineering Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016) Singapore Centre for 3D Printing In this paper, the forced convective heat transfer performances of heat sinks produced by Selective Laser Melting (SLM) were experimentally investigated. In total, three staggered array heat sinks were fabricated by SLM of aluminium alloy AlSi10Mg powders in Future of Manufacturing Lab 1, Singapore Centre for 3D Printing. The heat sinks which are of different fin geometries, namely, circular, rectangular rounded and aerofoil shaped fins (NACA 4424), were tested in a rectangular air flow channel. The flow channel was designed with large wall-to-fin clearance ratios such that pressure differences across the various heat sinks measured under similar flow conditions are negligible. Experiments performed for mass flow rates ranging from 0.00554 kg/s to 0.0387 kg/s showed that the heat transfer performances of the aerofoil and rectangular rounded heat sinks exceeded those of the circular heat sink. The highest enhancement in heat transfer coefficient of 33.9% was recorded with the rectangular round heat sink as compared to the circular heat sink at mass flow rate 0.0387 kg/s whereas the highest enhancement in heat transfer coefficient of 28.7% was achieved with aerofoil at mass flow rate 0.00554 kg/s. It is suggested that the aerodynamically designed aerofoil shapes resulted in minimal hydraulic resistance which allowed larger air flow rate between the fins with insignificant bypass, thereby improving the heat transfer performances of the heat sinks. On the other hand, vortex shedding due to the blunt edges of the rounded rectangular heat sink was postulated to have resulted in the enhanced heat transfer. NRF (Natl Research Foundation, S’pore) Published version 2016-12-14T03:00:32Z 2019-12-06T15:47:49Z 2016-12-14T03:00:32Z 2019-12-06T15:47:49Z 2016 Conference Paper Wong, K. K., Ho, J. Y., Leong, K. C., & Wong, T. N. (2016). Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting. Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016), 67-72. https://hdl.handle.net/10356/84588 http://hdl.handle.net/10220/41853 en © 2016 by Pro-AM 2016 Organizers. Published by Research Publishing, Singapore 6 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description In this paper, the forced convective heat transfer performances of heat sinks produced by Selective Laser Melting (SLM) were experimentally investigated. In total, three staggered array heat sinks were fabricated by SLM of aluminium alloy AlSi10Mg powders in Future of Manufacturing Lab 1, Singapore Centre for 3D Printing. The heat sinks which are of different fin geometries, namely, circular, rectangular rounded and aerofoil shaped fins (NACA 4424), were tested in a rectangular air flow channel. The flow channel was designed with large wall-to-fin clearance ratios such that pressure differences across the various heat sinks measured under similar flow conditions are negligible. Experiments performed for mass flow rates ranging from 0.00554 kg/s to 0.0387 kg/s showed that the heat transfer performances of the aerofoil and rectangular rounded heat sinks exceeded those of the circular heat sink. The highest enhancement in heat transfer coefficient of 33.9% was recorded with the rectangular round heat sink as compared to the circular heat sink at mass flow rate 0.0387 kg/s whereas the highest enhancement in heat transfer coefficient of 28.7% was achieved with aerofoil at mass flow rate 0.00554 kg/s. It is suggested that the aerodynamically designed aerofoil shapes resulted in minimal hydraulic resistance which allowed larger air flow rate between the fins with insignificant bypass, thereby improving the heat transfer performances of the heat sinks. On the other hand, vortex shedding due to the blunt edges of the rounded rectangular heat sink was postulated to have resulted in the enhanced heat transfer.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Wong, Kin Keong
Ho, Jin Yao
Leong, Kai Choong
Wong, Teck Neng
format Conference or Workshop Item
author Wong, Kin Keong
Ho, Jin Yao
Leong, Kai Choong
Wong, Teck Neng
spellingShingle Wong, Kin Keong
Ho, Jin Yao
Leong, Kai Choong
Wong, Teck Neng
Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting
author_sort Wong, Kin Keong
title Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting
title_short Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting
title_full Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting
title_fullStr Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting
title_full_unstemmed Convective Heat Transfer Performance Of Staggered Heat Sink Arrays Fabricated By Selective Laser Melting
title_sort convective heat transfer performance of staggered heat sink arrays fabricated by selective laser melting
publishDate 2016
url https://hdl.handle.net/10356/84588
http://hdl.handle.net/10220/41853
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