Summary
A three-dimensional study of laminar flow and heat transfer in a channel with built-in oval tube and delta winglets was carried out through the solution of the complete Navier-Stokes and energy equations using a body-fitted grid and a finite-volume method. The geometrical configuration represents an element of a gas-liquid fin-tube cross-flow heat exchanger. The size of such heat exchangers can be reduced through enhancement of transport coefficients on the air (gas) side, which are usually small compared with the liquid side. In a suggested strategy, oval instead of circular tubes were used, and delta-winglet type vortex generators in various configurations were mounted on the fin surface. An evaluation of the strategy was attempted. The structures of the velocity field and the heat transfer characteristics are presented. The results indicate that vortex generators in conjunction with the oval tube show definite promise for the improvement of fin-tube heat exchangers.
Details
- Original title: Heat transfer enhancement in cross-flow heat exchangers using oval tubes and multiple delta winglets.
- Record ID : 2004-1645
- Languages: English
- Source: International Journal of Heat and Mass Transfer - vol. 46 - n. 15
- Publication date: 2003/07
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Dynamics of cross heat exchanger behaviour.
- Author(s) : DELETIC S., VUJOVIC V.
- Date : 2007/02
- Languages : Serbian
- Source: KGH (Klimatizacija Grejanje Hladenje) - vol. 36 - n. 1
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Effect of inlet flow maldistribution on the the...
- Author(s) : YUAN P.
- Date : 2003/10
- Languages : English
- Source: International Journal of Heat and Mass Transfer - vol. 46 - n. 20
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A numerical study on the heat-transfer characte...
- Author(s) : CHEN W. L.
- Date : 2007/05
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 3
- Formats : PDF
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Constructual multi-scale cylinders in cross-flow.
- Author(s) : BELLO-OCHENDE T., BEJAN A.
- Date : 2005/03
- Languages : English
- Source: International Journal of Heat and Mass Transfer - vol. 48 - n. 7
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Generic dynamic model for heat exchangers.
- Author(s) : XUAN S., AUTE V., RADERMACHER R.
- Date : 2006/07/17
- Languages : English
- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
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