Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Journal of Enhanced Heat Transfer
Fator do impacto: 1.406 FI de cinco anos: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN On-line: 1563-5074

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

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v14.i1.20
pages 27-51

Effect of Rotation, Aspect Ratio, Channel Orientation, and Rib Pitch-to-Height Ratio on Pressure Drop and Heat Transfer Characteristics in a Rotating Channel with Ribs on One Principal Wall

K. Arun
Department of Mechanical Engineering, Indian Institute of Technology, Bombay Powai, Mumbai — 400 076, India
Santosh V. Prabhu
Department of Mechanical Engineering, Indian Institute of Technology, Bombay Powai, Mumbai – 400 076, India

RESUMO

The present investigation involves the study of the effects of rotation, channel aspect ratio, orientation angle, and rib pitch-to-height ratio on the friction factor and heat transfer in a rotating one-wall-ribbed channel. The rib angle with respect to the mainstream flow direction is 90°. Channels of aspect ratio one and two with two rib pitch-to-height ratios (P/e) of 5 and 10 at a constant rib height-to-hydraulic diameter ratio (e/D) of 0.1 are considered. Friction factors are obtained by experimental pressure drop measurements with water as the working fluid and the heat transfer results are obtained by numerical modeling using the v2f turbulence model with air as the working fluid. Experiments are conducted for the Reynolds number ranging from 13,000 to 17,000 with the rotation number varying from 0−0.38. Orientation angle is varied from 0° to 180° in steps of 30° to change the channel orientation for pressure drop measurements. Friction factor ratios of the rectangular channel are slightly higher (around 3−10%) than those of the square channel for a given rotation number, rib pitch-to-height ratio, and orientation angle. Friction factors of a rib pitch-to-height ratio of 5 are higher than those of 10 in both square and rectangular channels at orientation angles of 45° and 90° under conditions of rotation. Numerical prediction of heat transfer distribution is carried out at a constant Reynolds number of 30,000 with rotation number varying within 0−0.3 and three orientation angles of 0°, 45°, and 90°. Under conditions of rotation, it is observed that the square channels oriented at 0°, with a rib pitch-to-height ratio of 10 results in higher heat transfer augmentation whereas at 45° and 90° orientation angles, rectangular channels with a rib pitch-to-height ratio of 10 results in higher heat transfer.


Articles with similar content:

Pressure Drop Characteristics in a Rib Roughened Rotating Square Duct with a Sharp 180° Bend
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 4
Santosh V. Prabhu, Rajendra P. Vedula
EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER ENHANCEMENT WITH LOOSE-FIT PERFORATED TWISTED TAPES
Heat Transfer Research, Vol.50, 2019, issue 9
Ersin Karakaya, Sibel Gunes
HEAT TRANSFER ENHANCEMENT DUE TO SWIRL EFFECTS IN OVAL TUBES TWISTED ABOUT THEIR LONGITUDINAL AXIS
Journal of Enhanced Heat Transfer, Vol.20, 2013, issue 4
Raj M. Manglik, F. Bishara, Milind A. Jog
Inlet Flow Effects in Microchannels on Single-Phase Heat Transfer Coefficients and Friction Factors
International Heat Transfer Conference 15, Vol.18, 2014, issue
Josua Petrus Meyer, Jaco Dirker, Darshik V. Garach
The Combined Effects of Angle of Attack and Louver Angle of a Winglet Pair on Heat Transfer Enhancement
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 1
Joon Sik Lee, Byung Kyu Park, Jae Dong Chung