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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 51, 2020 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.v35.i12.50
10 pages

Experimental and Computational Investigation of the Hydrodynamics and Heat Transfer in a Flat Channel of Variable Width for Smooth and Intensified Surfaces

R. Banker
General Electric CR&D, USA
Mikhail Ya. Belenkiy
JSC "I. I. Polzunov Central Boiler and Turbine Institute" (NPO TsKTI), St. Petersburg, 195257, Russia
Mikhail Gotovskii
I. I. Polzunov Scientific and Development Association on Research and Design of Power Equipment (NPO TsKTI), 3/6 Atamanskaya Str., St. Petersburg, 191167, Russia
B. S. Fokin
JSC "I. I. Polzunov Central Boiler and Turbine Institute" (NPO TsKTI), St. Petersburg, 195257, Russia

Краткое описание

We present the results of experimental and computational investigation of the resistance and heat transfer in a flat channel of variable width with converging and diverging flows at rather small convergence (divergence) angles. The results were obtained for both smooth surfaces and surfaces with intensification by dimples. It is showed experimentally that for long channels, laminarization and flow instability effects appear even at angles of 1-2°. But there is a noticeable influence only on the resistance coefficient, whereas the behavior of heat transfer is almost the same as in the absence of acceleration for both smooth and intensified surface. The numerical analysis of convective heat transfer in a narrow converging channel with a package of 15 conical dimples on one of its sides generally confirmed the data obtained in physical experiments on the advanced increase in heat transfer as compared to hydraulic resistance. Vortex-type flow synchronization effect in dimples is established.


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