Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Journal of Enhanced Heat Transfer
Импакт фактор: 1.406 5-летний Импакт фактор: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Печать: 1065-5131
ISSN Онлайн: 1026-5511

Выпуски:
Том 27, 2020 Том 26, 2019 Том 25, 2018 Том 24, 2017 Том 23, 2016 Том 22, 2015 Том 21, 2014 Том 20, 2013 Том 19, 2012 Том 18, 2011 Том 17, 2010 Том 16, 2009 Том 15, 2008 Том 14, 2007 Том 13, 2006 Том 12, 2005 Том 11, 2004 Том 10, 2003 Том 9, 2002 Том 8, 2001 Том 7, 2000 Том 6, 1999 Том 5, 1998 Том 4, 1997 Том 3, 1996 Том 2, 1995 Том 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v1.i1.40
pages 37-52

Augmented Heat Transfer in Square Channels with Wedge-Shaped and Delta-Shaped Turbulence Promoters

Je-Chin Han
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University College Sation, TX 77843-3123, USA
J. Joy Huang
Department of Mechanical Engineering, Texas A & M University, College Station, Texas 77843-3123
Ching-Pang Lee
General Electric Company, Cincinnati, Ohio 45215, U.S.A.

Краткое описание

The effect of rib configuration on local heat transfer coefficients and pressure drop in a square channel with two opposite in-line ribbed walls was investigated at Reynolds numbers from 15,000 to 80,000. Two types of rib configurations were studied. The first group is a wedge-shaped rib with the rib height-to-hydraulic diameter ratio of 0.125 and the rib pitch-to-height ratio of 5 or 10. Both full length and broken ribs are studied. The second group is a delta-shaped rib with the rib height-to-hydraulic diameter ratio of 0.125 and the rib pitch-to-height ratio of 5. Both aligned and offset arrangements are studied for a forward and backward direction relative to the mainstream flow. Results show that, for the delta-shaped rib, the backward flow direction has higher heat transfer than the forward flow direction, and the aligned arrangement is better than the offset arrangement. The broken configuration for the wedge-shaped rib performs better than the full length one. In general, the delta-shaped rib performs better than the wedge-shaped rib. The backward delta-shaped aligned rib configuration produces the highest heat transfer augmentation (3-4 times), while the backward delta-shaped offset rib creates the smallest pressure drop penalty (5-6 times). Results also show that the surface heat flux ratio has significant effect on the smooth-side heat transfer augmentation, while the effect on the ribbed-side is relatively small.


Articles with similar content:

HEAT TRANSFER IN SQUARE CHANNELS WITH WEDGE-SHAPED AND DELTA-SHAPED TURBULENCE PROMOTERS
Journal of Enhanced Heat Transfer, Vol.24, 2017, issue 1-6
Je-Chin Han, J. Joy Huang, Ching-Pang Lee
A Louver Cooling Scheme for Gas Turbines Multiple Rows
ICHMT DIGITAL LIBRARY ONLINE, Vol.10, 2006, issue
Ibrahim Hassan, T. Lucas, X.-Z. Zhang
HEAT TRANSFER IN ROTATING NARROW RECTANGULAR PIN-FIN DUCTS
ICHMT DIGITAL LIBRARY ONLINE, Vol.1, 2000, issue
Arthur E. Bergles, Fred T. Willett
Abstract of "HEAT TRANSFER IN ROTATING NARROW RECTANGULAR PIN-FIN DUCTS"
ICHMT DIGITAL LIBRARY ONLINE, Vol.1, 2000, issue
Arthur E. Bergles, Fred T. Willett
An Experimental Study of Heat Transfer in the Turn Region of a U-Bend channel with Various Ribs
International Heat Transfer Conference 15, Vol.23, 2014, issue
Lei Wang, Bengt Sunden, Chenglong Wang