Advertisement

Heat and Mass Transfer

, 43:759 | Cite as

Experimental investigation of local heat transfer in a square duct with various-shaped ribs

  • Lei Wang
  • Bengt SundénEmail author
Original

Abstract

In the present study, experimental studies are carried out to investigate the heat transfer and friction characteristics in a square duct roughened by various-shaped ribs on one wall. The ribs are oriented transversely to the main stream in a periodic arrangement. Liquid crystal thermography is employed to measure the local and average heat transfer coefficient on the ribbed surface. The rib height-to-duct hydraulic diameter ratio is fixed at 0.1; the rib pitch-to-height ratio varies from 8 to 15 and the test Reynolds number spans from 8,000 to 20,000. The results show that the trapezoidal-shaped ribs with decreasing height in the flow direction (case C) provide the highest heat transfer enhancement factor and are likely to be used to suppress the local hot spot which usually occurs in the region just behind the ribs.

Keywords

Heat Transfer Heat Transfer Coefficient Nusselt Number Friction Factor Heat Transfer Performance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

The current research is financially supported by the Swedish National Energy Agency (STEM) and Swedish Research Council (VR).

References

  1. 1.
    Nikuradse J (1950) Law of flow in rough pipes, NACA TM 1292Google Scholar
  2. 2.
    Dipprey DF, Sabersky RH (1963) Heat and momentum transfer in smooth and rough tubes at various Prandtl numbers. Int J Heat Mass Transf 6:329–353CrossRefGoogle Scholar
  3. 3.
    Webb RL, Eckert ERG, Goldstein RJ (1971) Heat transfer and friction in tubes with repeated-rib roughness. Int J Heat Mass Transf 14:601–617CrossRefGoogle Scholar
  4. 4.
    Han JC (1984) Heat transfer and friction in channels with two opposite rib-roughened walls. ASME J Heat Transf 106:774–781CrossRefGoogle Scholar
  5. 5.
    Chandra PR, Alexander CR, Han JC (2003) Heat transfer and friction behaviors in rectangular channels with varying number of ribbed walls. Int J Heat Mass Transf 46:481–495CrossRefGoogle Scholar
  6. 6.
    Rau G, Cakan M, Moeller D, Arts T (1998) The effect of periodic ribs on the local aerodynamic and heat transfer performance of a straight cooling channel. ASME J Turbomach 120:368–375Google Scholar
  7. 7.
    Liou TM, Hwang JJ (1992) Turbulent heat transfer augmentation and friction in periodic fully developed channel flows. ASME J Heat Transf 114:56–64CrossRefGoogle Scholar
  8. 8.
    Lockett JF, Collins MW (1990) Holographic interferometry applied to rib-roughness heat transfer in turbulent flow. Int J Heat Mass Transf 33(11):2439–2449CrossRefGoogle Scholar
  9. 9.
    Han JC, Glicksman LR, Rohsenow WM (1978) An investigation of heat transfer and friction for rib-roughened surfaces. Int J Heat Mass Transf 21(8):1143–1156CrossRefGoogle Scholar
  10. 10.
    Liou TM, Hwang JJ (1993) Effect of ridge shapes on turbulent heat transfer and friction in rectangular channel. Int J Heat Mass Transf 36(4):931–940CrossRefGoogle Scholar
  11. 11.
    Arman B, Rabas TJ (1992) Disruption shape effect on the performance of enhanced tubes with the separation and reattachment mechanism, ASME Symposium, HTD-202, Enhanced Heat Transfer, 67–75Google Scholar
  12. 12.
    Chandra PR, Fontenot ML, Han JC (1998) Effect of rib profiles on turbulent channel flow heat transfer. AIAA J Thermophysics Heat Transf 12(1):116–118CrossRefGoogle Scholar
  13. 13.
    Ahn SW (2001) The effect of roughness type on friction factors and heat transfer in roughened rectangular duct. Int Comm Heat Mass Transf 28(7):933–942CrossRefGoogle Scholar
  14. 14.
    Aliaga DA, Lamb JP, Klein DE (1994) Convection heat transfer distributions over plates with square ribs from infrared thermography measurements. Int J Heat Mass Transf 37:363–374CrossRefGoogle Scholar
  15. 15.
    Taslim ME, Li T, Kercher DM (1996) Experimental heat transfer and Friction in channels roughened with angled, V-Shaped, and discrete ribs on two opposite walls. ASME J Turbomachinery 118:20–28Google Scholar
  16. 16.
    Tanda G (2004) Heat transfer in rectangular channels with transverse and V-shaped broken ribs. Int J Heat Mass Transf 47:229–243CrossRefGoogle Scholar
  17. 17.
    Wang Z, Ireland PT, Kohler ST, Chew JW (1998) Heat transfer measurements to a gas turbine cooling passage with inclined ribs. ASME J Turbomachinery 120:63–69Google Scholar
  18. 18.
    Chang SW, Liou TM, Juan WC (2005) Influence of channel height on heat transfer augmentation in rectangular channels with two opposite rib-roughened walls. Int J Heat Mass Transf 48:2806–2813CrossRefGoogle Scholar
  19. 19.
    Wang L, Sundén B (2005) Experimental investigation of local heat transfer in a square duct with continuous and truncated ribs. Exp Heat Transf 18:179–197Google Scholar
  20. 20.
    Gao X (2002) Heat transfer and fluid flow investigation in ribbed ducts and impinging jets using liquid crystal thermography and PIV, Ph. D. Thesis, Division of Heat Transfer, Lund Institute of Technology, LundGoogle Scholar
  21. 21.
    Holman JP (2001) Heat transfer, 9th edn, Chap. 6–2, McGraw-Hill, New YorkGoogle Scholar
  22. 22.
    Moffat RJ (1988) Describing the uncertainty in experimental results. Exp Therm Fluid Sci 1:3–17CrossRefGoogle Scholar
  23. 23.
    Terekhov VI, Yaryina NI, Zhdanov RF (2003) Heat transfer in turbulent separated flows in the presence of high free-stream turbulence. Int J Heat Mass Transf 46:4535–4551CrossRefGoogle Scholar
  24. 24.
    Papadopoulos G, Ötugen MV (1995) Separating and reattaching flow structure in a suddenly expanding rectangular duct. ASME J Fluids Eng 17:17–23Google Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Heat Transfer DivisionLund Institute of Technology LundSweden

Personalised recommendations