A Study of Various Numerical Turbulence Modeling Methods in Boundary Layer Excitation of a Square Ribbed Channel

Among the various cooling processes in industrial applications such as: electronic devices, heat exchangers, gas turbines, etc. Gas turbine blades cooling is the most challenging one. One of the most common practices is using ribbed wall because of the boundary layer excitation and therefore making the ultimate cooling. Vortex formation between rib and channel wall will result in a complicated behavior of flow regime. At the other hand, selecting the most efficient method for capturing the best results comparing to experimental works would be a fascinating issue. In this paper 4 common methods in turbulence modeling: standard k-e, rationalized k-e with enhanced wall boundary layer treatment, k-w and RSM (Reynolds stress model) are employed to a square ribbed channel to investigate the separation and thermal behavior of the flow in the channel. Finally all results from different methods which are used in this paper will be compared with experimental data available in literature to ensure the numerical method accuracy. Keywords—boundary layer, turbulence, numerical method, rib cooling

[1]  Fann Shin,et al.  Local heat transfer in a rotating serpentine passage with rib-roughened surfaces , 1994 .

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

[3]  S. Chang,et al.  Heat transfer in a radially rotating square duct fitted with in-line transverse ribs , 2003 .

[4]  T. Liou,et al.  LDV Measurements of Periodic Fully Developed Main and Secondary Flows in a Channel With Rib-Disturbed Walls , 1993 .

[5]  A. Murata,et al.  Detailed measurements of local heat transfer coefficients in turbulent flow through smooth and rib-roughened serpentine passages with a 180° sharp bend , 1999 .

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

[7]  T. Liou,et al.  Experimental and Computational Study of Turbulent Flows in a Channel With Two Pairs of Turbulence Promoters in Tandem , 1990 .

[8]  T. Arts,et al.  The Effect of Periodic Ribs on the Local Aerodynamic and Heat Transfer Performance of a Straight Cooling Channel , 1996 .

[9]  W. Tao,et al.  A three dimensional investigation of turbulent flow and heat transfer around sharp 180-deg turns in two-pass rib-roughened channels , 1997 .

[10]  S. Acharya,et al.  Flow and Heat Transfer in an Internally Ribbed Duct With Rotation: An Assessment of LES and URANS , 2003 .

[11]  Karen A. Thole,et al.  Experimental validation of large eddy simulations of flow and heat transfer in a stationary ribbed duct , 2006 .

[12]  Sadanari Mochizuki,et al.  Comparison between laminar and turbulent heat transfer in a stationary square duct with transverse or angled rib turbulators , 2001 .

[13]  Liang-Bi Wang,et al.  Experimental study of developing turbulent flow and heat transfer in ribbed convergent/divergent square ducts , 2001 .

[14]  C. Prakash,et al.  Prediction of Turbulent Flow and Heat Transfer in a Ribbed Rectangular Duct With and Without Rotation , 1993 .

[15]  Karen A. Thole,et al.  FLOWFIELD MEASUREMENTS IN A RIBBED CHANNEL RELEVANT TO INTERNAL TURBINE BLADE COOLING , 2004 .

[16]  F. Durst,et al.  Experimental and Computational Investigation of the Two-Dimensional Channel Flow Over Two Fences in Tandem , 1988 .

[17]  Je-Chin Han,et al.  Flow and Heat Transfer in a Rotating Square Channel With 45 deg Angled Ribs by Reynolds Stress Turbulence Model , 2001 .

[18]  Srinath V. Ekkad,et al.  Detailed heat transfer measurements inside straight and tapered two-pass channels with rib turbulators , 2000 .

[19]  Danesh K. Tafti,et al.  Evaluating the role of subgrid stress modeling in a ribbed duct for the internal cooling of turbine blades , 2005 .

[20]  M. Chyu,et al.  A Numerical Study of Flow and Heat Transfer in a Smooth and Ribbed U-Duct With and Without Rotation , 2001 .

[21]  S. Lau,et al.  Heat/Mass Transfer in a Rotating Two-Pass Channel with Transverse Ribs , 1998 .

[22]  Je-Chin Han,et al.  A Numerical Study of Flow and Heat Transfer in Rotating Rectangular Channels (AR=4) With 45° Rib Turbulators by Reynolds Stress Turbulence Model , 2002 .

[23]  Sumanta Acharya,et al.  Periodically developed flow and heat transfer in a ribbed duct , 1993 .

[24]  Turbulence kinetic energy in turbulent flows through square ducts with rib-roughened walls , 1992 .

[25]  Danesh K. Tafti,et al.  Large Eddy Simulation of Flow and Heat Transfer in a Staggered 45° Ribbed Duct , 2004 .

[26]  Jenn-Jiang Hwang,et al.  Turbulent Heat Transfer Augmentation and Friction in Periodic Fully Developed Channel Flows , 1992 .

[27]  Masud Behnia,et al.  Reynolds averaged simulation of flow and heat transfer in ribbed ducts , 2002 .

[28]  R. Hino,et al.  Experimental analysis of turbulent flow structure in a fully developed rib-roughened rectangular channel with PIV , 2002 .

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

[30]  Jenn-Jiang Hwang,et al.  Developing Heat Transfer and Friction in a Ribbed Rectangular Duct With Flow Separation at Inlet , 1992 .

[31]  Je-Chin Han,et al.  Prediction of Flow and Heat Transfer in Rotating Two-Pass Rectangular Channels With 45-deg Rib Turbulators , 2002 .

[32]  D. Nikitopoulos,et al.  Detailed mass transfer distribution in a ribbed coolant passage with a 180° bend , 2000 .

[33]  Je-Chin Han,et al.  Heat Transfer and Friction in Channels With Two Opposite Rib-Roughened Walls , 1984 .