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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2017018543
pages 1707-1725

HEAT TRANSFER IN AN OVAL TUBE HEAT EXCHANGER WITH DIFFERENT KINDS OF LONGITUDINAL VORTEX GENERATORS

Daniel Diaz
Department of Mechanical Engineering, Universidad de Chile, 8370456, Santiago, Chile
Alvaro Valencia
Department of Mechanical Engineering, Universidad de Chile, 8370456, Santiago, Chile

Краткое описание

A numerical study was performed on a plate fin and oval tube heat exchanger with different kinds of longitudinal vortex generators (LVG). The influence of LVG on heat transfer and pressure drop is investigated, and eight different LVG geometries are compared: delta-type, rectangular, spoon-type, and five ellipse-shaped cases. The numerical study involves a three-dimensional steady and laminar flow and conjugate heat transfer. The results show that one longitudinal vortex (LV) is generated for each LVG for all cases except for the spoon-type case, where two LVs are generated. The results of experimental and numerical investigations were compared validation. The highest increase in heat transfer corresponds to the Delta case (14% for Redh = 720), followed by the Ellipse 1 (13%), Ellipse 2, Ellipse 5 and Rectangular (11%), Ellipse 3 (8%), and Ellipse 4 and Spoon (7%) cases. The highest increase in the pressure drop corresponds to the Ellipse 1 case (20% for Redh = 720), followed by the Delta (19%), Ellipse 2 (15%), Ellipse 5 (14%), Rectangular (13%), Ellipse 3 (11%), and Ellipse 4 and Spoon (9%) cases. The highest heat transfer rate, with the same flow power consumption, corresponds to the Delta, Rectangular, Ellipse 1, 2, and 5 cases.


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