Experimental study on the heat transfer characteristics of high blockageribs channel

Abstract The heat transfer and pressure loss characteristics on a square channel with two opposite surfaces roughened by high blockage ratio ribs are measured by systematic experiments. Reynolds number studied in the channel range from 1400 to 9000. The rib height (e) to the height of ribbed channel (H) ratios are 0.2 and 0.33, respectively. The rib spacing (S) to height ratio (S/e) ranges from 5 to 15. The rib orientations in the opposite surfaces are symmetric and staggered arrangement. The experimental results show that (1) the heat transfer coefficients are increased with the increase of Reynolds number, though at the cost of higher pressure losses; (2) when the rib spacing to height ratio is 10, it keeps a highest heat transfer coefficient in three kinds of rib spacing to height ratio 5, 10 and 15; (3) the heat transfer coefficient of symmetric arrangement ribs is higher than the staggered arrangement ribs, but the pressure losses of symmetric arrangement ribs is larger than the staggered arrangement ribs; (4) compared with one-side ribbed channel, the heat transfer coefficient of two-side ribbed channel is distinct higher than that of one-side ribbed channel.

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

[2]  R. T. Kukreja,et al.  Local heat/mass transfer distribution in a square channel with full and V-shaped ribs , 1993 .

[3]  J. Wolfersdorf,et al.  Experimental Study of Advanced Convective Cooling Techniques for Combustor Liners , 2008 .

[4]  Tommaso Astarita,et al.  Convective heat transfer in a square channel with angled ribs on two opposite walls , 2003 .

[5]  Weihong Zhang,et al.  Computational Fluid Dynamics Modeling Flow Field and Side-Wall Heat Transfer in Rectangular Rib-Roughened Passages , 2013 .

[6]  M. Taslim,et al.  Measurements of Heat Transfer Coefficients and Friction Factors in Rib-Roughened Channels Simulating Leading-Edge Cavities of a Modern Turbine Blade , 1995 .

[7]  Sadanari Mochizuki,et al.  Effects of Rib Arrangements on Heat Transfer and Flow Behavior in a Rectangular Rib-Roughened Passage: Application to Cooling of Gas Turbine Blade Trailing Edge , 2001 .

[8]  Jeremy Clyde Bailey,et al.  Heat Transfer and Friction in Channels With Very High Blockage 45° Staggered Turbulators , 2003 .

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

[10]  Dong Hyun Lee,et al.  Optimal design of angled rib turbulators in a cooling channel , 2009 .

[11]  J. H. Wagner,et al.  Heat Transfer in Rotating Passages With Smooth Walls and Radial Outward Flow , 1989 .

[12]  M. Taslim,et al.  Darryl E. Metzger Memorial Session Paper: Experimental Heat Transfer and Friction in Channels Roughened With Angled, V-Shaped, and Discrete Ribs on Two Opposite Walls , 1996 .

[13]  Chih-Yung Huang,et al.  Particle image velocimetry and infrared thermography measurements in a two-pass 90-deg ribbed parallelogram channel , 2016 .

[14]  Je-Chin Han,et al.  An investigation of heat transfer and friction for rib-roughened surfaces , 1978 .

[15]  Tony Arts,et al.  Experimental investigation of conjugate heat transfer in a rib-roughened trailing edge channel with crossing jets , 2012 .

[16]  J. P. Holman,et al.  Experimental methods for engineers , 1971 .

[17]  Mingking K. Chyu,et al.  Calculations and measurements of heat transfer in a square duct with inclined ribs , 1996 .

[18]  Jens von Wolfersdorf,et al.  An Experimental and Numerical Study of Heat Transfer and Pressure Loss in a Rectangular Channel With V-Shaped Ribs , 2006 .

[19]  Je-Chin Han,et al.  Heat transfer performance comparisons of five different rectangular channels with parallel angled ribs , 1992 .

[20]  Zhu Dongsheng,et al.  Flow structure and heat transfer in a narrow rectangular channel with different discrete rib arrays , 2013 .

[21]  Kwang-Yong Kim,et al.  Evaluation of heat transfer performances of various rib shapes , 2014 .

[22]  G. Tanda.  Effect of rib spacing on heat transfer and friction in a rectangular channel with 45° angled rib turbulators on one/two walls , 2011 .

[23]  Baihua Ren.  A combined numerical and experimental study of heat transfer in a roughened square channel , 2014 .

[24]  Jason E. Dees,et al.  Experimental Measurements and Computational Predictions for an Internally Cooled Simulated Turbine Vane With 90 Degree Rib Turbulators , 2012 .

[25]  Guohui Li,et al.  Experimental investigation on heat transfer characteristics of film cooling using parallel-inlet holes , 2012 .

[26]  Je-Chin Han,et al.  Uneven Wall Temperature Effect on Local Heat Transfer in a Rotating Two-Pass Square Channel With Smooth Walls , 1993 .

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

[28]  Wei Liu,et al.  Effects of rib arrangements on the flow pattern and heat transfer in an internally ribbed heat exchanger tube , 2016 .

[29]  M. Taslim,et al.  EXPERIMENTAL HEAT TRANSFER AND FRICTION IN CHANNELS ROUGHENED WITH ANGLED, V-SHAPED AND DISCRETE RIBS ON TWO OPPOSITE WALLS , 1994 .

[30]  Jie Han,et al.  Heat transfer and friction characteristics in rectangular channels with rib turbulators , 1988 .

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

[32]  Jenn-Jiang Hwang,et al.  Effect of ridge shapes on turbulent heat transfer and friction in a rectangular channel , 1993 .

[33]  Mohammad E. Taslim,et al.  An Experimental Investigation of the Rib Surface-Averaged Heat Transfer Coefficient in a Rib-Roughened Square Passage , 1997 .

[34]  Sandip Dutta,et al.  Internal convection heat transfer and cooling: An experimental approach , 1995 .

[35]  Je-Chin Han,et al.  Augmented heat transfer in triangular ducts with full and partial ribbed walls , 1994 .

[36]  Jens von Wolfersdorf,et al.  An Experimental and Numerical Study of Heat Transfer and Pressure Losses of V- and W-Shaped Ribs at High Reynolds Numbers , 2007 .

[37]  Srinath V. Ekkad,et al.  Gas Turbine Heat Transfer and Cooling Technology , 2012 .

[38]  M. Taslim,et al.  A Combined Numerical and Experimental Study of Heat Transfer in a Roughened Square Channel with 45∘ Ribs , 2005 .

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

[40]  J. Park,et al.  Effects of inlet velocity profile on flow and heat transfer in the entrance region of a ribbed channel , 2016 .

[41]  Je-Chin Han,et al.  Computation of Flow and Heat Transfer in Two-Pass Rotating Rectangular Channels (AR=1:1, AR=1:2, AR=1:4) With 45-deg. Angled Ribs by Reynolds Stress Turbulence Model , 2004 .