A Numerical Study of Flow and Heat Transfer in Rotating Rectangular Channels (AR=4) With 45° Rib Turbulators by Reynolds Stress Turbulence Model

Computations were performed to study three-dimensional turbulent flow and heat transfer in a rotating smooth and 45° ribbed rectangular channels for which heat transfer data were available. The channel aspect ratio (AR) is 4:1, the rib height-to-hydraulic diameter ratio (e/Dh ) is 0.078 and the rib-pitch-to-height ratio (P/e) is 10. The rotation number and inlet coolant-to-wall density ratios, Δρ/ρ, were varied from 0.0 to 0.28 and from 0.122 to 0.40, respectively, while the Reynolds number was fixed at 10,000. Also, two channel orientations (β − 90° and 135° from the rotation direction) were investigated with focus on the high rotation and high density ratios effects on the heat transfer characteristics of the 135° orientation. These results show that, for high rotation and high density ratio, the rotation induced secondary flow overpowered the rib induced secondary flow and thus change significantly the heat transfer characteristics compared to the low rotation low density ratio case. A multi-block Reynolds-Averaged Navier-Stokes (RANS) method was employed in conjunction with a near-wall second-moment turbulence closure. In the present method, the convective transport equations for momentum, energy, and turbulence quantities are solved in curvilinear, body-fitted coordinates using the finite-analytic method.Copyright © 2002 by ASME

[1]  H. Iacovides.  Computation of flow and heat transfer through rotating ribbed passages , 1998 .

[2]  Je-Chin Han,et al.  Developing heat transfer in rectangular channels with rib turbulators , 1988 .

[3]  Je-Chin Han,et al.  Effect of model orientation and wall heating condition on local heat transfer in a rotating two-pass square channel with rib turbulators , 1995 .

[4]  R. Zerkle,et al.  Prediction of Turbulent Flow and Heat Transfer in a Ribbed Rectangular Duct With and Without Rotation , 1993 .

[5]  Ian K. Jennions,et al.  Heat Transfer Predictions for Rotating U-Shaped Coolant Channels With Skewed Ribs and With Smooth Walls , 1997 .

[6]  C. P. Lee,et al.  Augmented Heat Transfer in Square Channels With Parallel, Crossed, and V-Shaped Angled Ribs , 1991 .

[7]  J. Wagner,et al.  Heat transfer in rotating serpentine passages with trips skewed to the flow , 1992 .

[8]  Je-Chin Han,et al.  Heat transfer in rotating rectangular cooling channels with angled ribs , 2001 .

[9]  Je-Chin Han,et al.  Computation of heat transfer in rotating two-pass square channels by a second-moment closure model , 2000 .

[10]  T. Liou,et al.  Fluid Flow in a 180 Deg Sharp Turning Duct With Different Divider Thicknesses , 1998 .

[11]  Je-Chin Han,et al.  Detailed heat transfer distributions in two-pass square channels with rib turbulators , 1997 .

[12]  Wagner,et al.  Heat transfer in rotating serpentine passages with trips normal to the flow , 1992 .

[13]  T. I-P. Shih,et al.  Computation of Compressible Flow and Heat Transfer in a Rotating Duct With Inclined Ribs and a 180-Degree Bend , 1997 .

[14]  Warren M. Rohsenow,et al.  Heat Mass and Momentum Transfer , 1961 .

[15]  Je-Chin Han,et al.  Near-Wall Second-Moment Closure for Rotating Multiple-Pass Cooling Channels , 2000 .

[16]  M. Stephens,et al.  Computation of flow and heat transfer in a rectangular channel with ribs , 1995 .

[17]  Je-Chin Han,et al.  Flow and Heat Transfer in a Rotating Square Channel With 45° Angled Ribs by Reynolds Stress Turbulence Model , 2000 .

[18]  Je-Chin Han,et al.  Local Heat Transfer in Rotating Smooth and Ribbed Two-Pass Square Channels With Three Channel Orientations , 1996 .

[19]  J. H. Wagner,et al.  Heat Transfer in Rotating Serpentine Passages With Smooth Walls , 1991 .

[20]  Je-Chin Han,et al.  Numerical Prediction of Flow and Heat Transferin a Two-pass Square Channel with 90° Ribs , 2001 .

[21]  Ching-Pang Lee,et al.  Surface Heating Effect on Local Heat Transfer in a Rotating Two-Pass Square Channel With 60 deg Angled Rib Turbulators , 1995 .

[22]  G. J. Hwang,et al.  An Experimental Study of Convective Heat Transfer in Radially Rotating Rectangular Ducts , 1991 .

[23]  J. H. Wagner,et al.  Heat Transfer in Rotating Serpentine Passages With Selected Model Orientations for Smooth or Skewed Trip Walls , 1993 .

[24]  Je-Chin Han,et al.  Prediction of Flow and Heat Transfer in Rotating Two-Pass Rectangular Channels With 45° Rib Turbulators , 2001 .

[25]  H. C. Chen,et al.  AIAA 2000~1036 Computation of Flow and Heat Transfer In Two-Pass Channels With 60' Ribs , 2000 .