The full-field Nusselt number (Nu) distributions and flow fields are presented, respectively, using steady-state infrared thermography (IR) and particle image velocimetry (PIV) in the two-pass parallelogram channels with attached and detached transverse ribs. These square transverse ribs on two opposite channel walls are in-line arranged with rib-height to duct-height ratio of 0.1 and rib pitch-to-height ratio of 10. For the detached ribs, the detached distance between rib and channel wall is 0.38 rib height. With the measurements of Fanning friction factor (f), the thermal performance factors (TPF) for the attached and detached-rib cases are comparatively examined. A set of Nu, f, and TPF with the associated flow measurements at the Reynolds number range of 5000 ≤ Re ≤ 20,000 is selected to disclose the differential heat transfer mechanisms and efficiencies between the attached and detached ribbed channels. Empirical correlations evaluating the area-averaged Nusselt numbers () and f factors are devised to assist the relevant design activities.
Issue Section:
Heat and Mass Transfer
References
1.
Zhao
, C. Y.
, and Tao
, W. Q.
, 1997
, “Effect of Rib Angle Orientation on Local Mass Transfer Distribution Around Sharp 180 Deg Turn With Rib-Turbulators Mounted in Entire Two-Pass Channels
,” Heat Mass Transfer
, 32
(5
), pp. 325
–332
.2.
Mochizuki
, S.
, Murata
, R.
, Shibata
, R.
, and Yang
, W. J.
, 1999
, “Detailed Measurements of Local Heat Transfer Coefficients in Turbulent Flow Through Smooth and Rib-Roughened Serpentine Passages With a 180 Deg Sharp Bend
,” Int. J. Heat Mass Transfer
, 42
(11
), pp. 1925
–1934
.3.
Liou
, T. M.
, Chen
, C. C.
, and Tsai
, T. W.
, 2000
, “Heat Transfer and Fluid Flow in a Square Duct With 12 Different Shaped Vortex Generators
,” ASME J. Heat Transfer
, 122
(2
), pp. 327
–335
.4.
Fu
, W. L.
, Wright
, L. M.
, and Han
, J. C.
, 2006
, “Rotational Buoyancy Effects on Heat Transfer in Five Different Aspect-Ratio Rectangular Channels With Smooth Walls and 45 Degree Ribbed Walls
,” ASME J. Heat Transfer
, 128
(11
), pp. 1130
–1141
.5.
Gao
, J. Y.
, and Chang
, S. W.
, 2015
, “Heat Transfer Enhancement by Skewed Wavy Sidewall for Two-Pass Ribbed Channels With Different Aspect Ratios
,” Int. J. Heat Mass Transfer
, 73
, pp. 217
–230
.6.
Xu
, G. Q.
, Lee
, Y.
, and Deng
, H. W.
, 2015
, “Effect of Rib Spacing on Heat Transfer and Friction in a Rotating Two-Pass Square Channel With Asymmetrical 90-Deg Rib Turbulators
,” Appl. Therm. Eng.
, 80
, pp. 386
–395
.7.
Dutta
, S.
, Han
, J. C.
, and Lee
, C. P.
, 1996
, “Local Heat Transfer in a Rotating Two-Pass Ribbed Triangular Duct With Two Model Orientations
,” Int. J. Heat Mass Transfer
, 39
(4
), pp. 707
–715
.8.
Liou
, T. M.
, Chang
, S. W.
, and Yang
, C. C.
, 2014
, “Heat Transfer and Pressure Drop Measurements of Rotating Twin-Pass Parallelogram Ribbed Channel
,” Int. J. Therm. Sci.
, 79
, pp. 206
–219
.9.
Lee
, S. W.
, 2007
, “Heat Transfer Characteristics of a Two-Pass Trapezoidal Channel and a Novel Heat Pipe
,” Ph.D. thesis, Texas A&M University, College Station, TX.10.
Schabacker
, J.
, Bölcs
, A.
, and Johnson
, B. V.
, 1998
, “PIV Investigation of the Flow Characteristics in an Internal Coolant Passage With Two Ducts Connected by a Sharp 180° Bend
,” ASME
Paper No. 98-GT-544. 11.
Schabacker
, J.
, Boelcs
, A.
, and Johnson
, B. V.
, 1999
, “PIV Investigation of the Flow Characteristics in an Internal Coolant Passage With 90-Deg Rib-Arrangement
,” 3rd European Conference on Turbomachinery-Fluid Dynamics and Thermodynamics
, London, UK, pp. 973–984.12.
Elfert
, M.
, Jarius
, M. P.
, and Weigand
, B.
, 2004
, “Detailed Flow Investigation Using PIV in a Typical Turbine Cooling Geometry With Ribbed Walls
,” ASME
Paper No. GT2004-53566. 13.
Elfert
, M.
, Voges
, M.
, and Klinner
, J.
, 2008
, “Detailed Flow Investigation Using PIV in a Rotating Square-Sectioned Two-Pass Cooling System With Ribbed Walls
,” ASME
Paper No. GT2008-51183. 14.
Schroll
, M.
, Lange
, L.
, and Elfert
, M.
, 2011
, “Investigation of the Effect of Rotation on the Flow in a Two-Pass Cooling System With Smooth and Ribbed Walls Using PIV
,” ASME
Paper No. GT2011-46427. 15.
Liou
, T. M.
, Wang
, W. B.
, and Chang
, Y. J.
, 1995
, “Holographic Interferometry Study of Spatially Periodic Heat Transfer in a Channel With Ribs Detached From One Wall
,” ASME J. Heat Transfer
, 117
(1
), pp. 32
–39
.16.
Liou
, T. M.
, Chen
, M. Y.
, and Wang
, Y. M.
, 2003
, “Heat Transfer, Fluid Flow, and Pressure Measurements Inside a Rotating Two-Pass Duct With Detached 90-Deg Ribs
,” ASME J. Turbomach.
, 125
(3
), pp. 565
–574
.17.
Liou
, T. M.
, Hwang
, Y. S.
, and Chen
, M. Y.
, 2005
, “Characteristics of Pressure, Flow, and Heat Transfer in Rotating Internal Cooling Passages With Attached-Detached Ribs
,” ASME
Paper No. GT2005-68661. 18.
Liou
, T. M.
, Chang
, S. W.
, Chan
, S. P.
, and Liu
, Y. S.
, 2015
, “Particle Image Velocimetry Measurements in a Two-Pass 90 Degree Ribbed-Wall Parallelogram Channel
,” ASME J. Turbomach.
, 137
(4
), p. 041012
.19.
Kim
, J. H.
, Simon
, T. W.
, and Viskanta
, R.
, 1993
, “Journal of Heat Transfer Policy on Reporting Uncertainties in Experimental Measurements and Results
,” ASME J. Heat Transfer
, 115
(1
), pp. 5
–6
.20.
Keane
, R. D.
, and Adrian
, R. J.
, 1991
, “Optimization of Particle Image Velocimeters—II: Multiple Pulsed Systems
,” Meas. Sci. Technol.
, 2
(10
), pp. 963
–974
.21.
Chang
, S. W.
, Liou
, T.-M.
, and Po
, Y.
, 2010
, “Coriolis and Rotating Buoyancy Effect on Detailed Heat Transfer Distributions in a Two-Pass Square Channel Roughened by 450 Ribs at High Rotation Numbers
,” Int. J. Heat Mass Transfer
, 53
, pp. 1349
–1363
.22.
Johnson
, B. V.
, Wagner
, J. H.
, Steuber
, G. D.
, and Yeh
, F. C.
, 1994
, “Heat Transfer in Rotating Serpentine Passages With Trips Normal to the Flow
,” ASME J. Turbomach.
, 116
(1
), pp. 113
–123
.23.
Liu
, Y. S.
, 2014
, “Experimental Studies of Fluid Flow in Two-Pass Parallelogram Channels With Smooth Wall and Attached/Detached 90-Degree Rib Arrays
,” Master thesis, National Tsing-Hua University, Hsinchu, Taiwan.Copyright © 2017 by ASME
You do not currently have access to this content.
