Skip to main content
SpringerLink
Log in

Numerical study of conjugate heat transfer of steam and air in high aspect ratio rectangular ribbed cooling channel

  • Published:
Journal of Mechanical Science and Technology Aims and scope Submit manuscript

Abstract

The relationship between flow field and heat transfer in an air/steam cooled ribbed channel was numerically investigated and compared. The width to height ratio was 4 and the rib height to hydraulic diameter was 0.078. The conjugate heat transfer method was adopted and a uniform heat source was located in the solid domain to simulate the actual heating method in the experiment. The GGI method was used to deal with the solid-fluid interface. The fluid field structure was shown by vortex core technology. We found that the wall heat flux distribution is similar with that of the Nusselt number, which is periodic. The temperature difference of a certain position on the inner and outer wall was less than 2 K. The Nusselt number reached its peak value at No.15-18 part and then decreased. The large width to height ratio led to strong interaction between the main flow fluid and the fluid in near wall region. As a result, an extra main flow secondary flow and two separation vortexes could be observed. These three additional vortexes were all in main flow region. The two separation vortexes approached to each other in flow direction and mixed into one vortex at low Reynolds number. When Reynolds number is larger than 30000, the two vortexes remain independent. The relative distance between them reaches the minimum value and the Nusselt number reaches the peak value at the same time. In addition, the flow field structure is mainly determined by Reynolds number and the fluid type cannot obviously influence the secondary flow distribution. The generation and separation of secondary flow as well as the mixing of secondary flows can enhance the local heat transfer strength.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. C. Han, J. S. Park and C. K. Lei, Heat transfer enhancement in channels with turbulence promoters, ASME J. Engng. Gas Turbines Pwr., 107 (1985) 628–635.

    Article  Google Scholar 

  2. J. C. Han and J. S. Park, Developing heat transfer in rectangular channels with rib turbulators, Int. J. Heat Mass Tran., 31 (1) (1988) 183–195.

    Article  Google Scholar 

  3. J. S. Park, J. C. Han, Y. Huang and S. Ou, Heat transfer performance comparisons of five different rectangular channels with parallel angled ribs, Int. J. Heat Mass Tran., 35 (11) (1992) 2891–2903.

    Article  Google Scholar 

  4. J. C. Han, Y. M. Zhang and C. P. Lee, Influence of surface heat flux ratio on heat transfer augmentation in square channels with parallel, crossed, and V-shaped angled ribs, J. Turbomach., 114 (4) (1992) 872–880.

    Article  Google Scholar 

  5. P. R. Chandra, M. L. Fontenot and J. C. Han, Effect of rib profiles on turbulent channel flow heat transfer, J. Therm Heat Tran., 12 (1) (1998) 116–118.

    Article  Google Scholar 

  6. Y. J. Jang, H. C. Chen and J. C. Han, Flow and heat transfer in a rotating square channel with 45 deg angled ribs by Reynolds stress turbulence model, J. Turbomach., 123 (1) (2001) 124–132.

    Article  Google Scholar 

  7. G. Rau, M. Cakan, D. Moeller and T. Arts, The effect of periodic ribs on the local aerodynamic and heat transfer performance of a straight cooling channel, J. Turbomach., 120 (2) (1998) 368–375.

    Article  Google Scholar 

  8. R. Kiml, S. Mochizuki and A. Murata, Effects of rib height on heat transfer performance inside a high aspect ratio channel with inclined ribs, J. Enhanced Heat Trans., 10 (4) (2003) 431–443.

    Article  Google Scholar 

  9. C. H. Liu and T. N. H. Chung, Forced convective heat transfer over ribs at various separation, Int. J. Heat Mass Tran., 55 (19-20) (2012) 5111–5119.

    Article  Google Scholar 

  10. D. N. Ryu, D. H. Choi and V. C. Patel, Analysis of turbulent flow in channels roughened by two-dimensional ribs and three-dimensional blocks, Part II: Heat Transfer, Int. J. Heat Fluid Flow, 28 (5) (2007) 1112–1124.

    Article  Google Scholar 

  11. S. Leonardi, P. Orlandi, L. Djenidi and R. A. Antonia, Structure of turbulent channel flow with square bars on one wall, Int. J. Heat Fluid Flow, 25 (3) (2004) 384–392.

    Article  MATH  Google Scholar 

  12. J. Schabacker, A. Bolcs and B. V. Johnson, PIV Investigation of the flow characteristics in an internal coolant passage with two Ducts connected by a sharp 180° bend, International Gas Turbine and Aeroengine Congress and Exposition 1998, Stockholm, Sweden (1998) ASME Paper 98-GT-544.

    Google Scholar 

  13. M. Schüler, F. Zehnder, B. Weigand, V. J. Wolfersdorf and S. O. Neumann, The effect of turning vanes on pressure loss and heat transfer of a ribbed rectangular two-pass internal cooling channel, J. Turbomach., 133 (2) (2010) 021017–021017.

    Article  Google Scholar 

  14. X. Liu, Z. Tao, S. Ding and G. Xu, Experimental investigation of heat transfer characteristics in a variable cross-sectioned two-pass channel with combined film cooling holes and inclined ribs, Appl. Therm. Eng., 50 (1) (2013) 1186–1193.

    Article  Google Scholar 

  15. T. M. Liou, S. W. Chang, S. P. Chan and Y. S. Liu, PIV measurements in a two-pass 90-deg ribbed-wall parallelo gram channel, Proceedings of ASME Turbo Expo 2014, Dusseldorf, Germany (2014) ASME GT2014-25248.

    Google Scholar 

  16. S. Kubacki, J. Rokocki and E. Dick, Hybrid RANS/LES of flow in a rib-roughened rotating channel, Proceedings of ASME Turbo Expo 2014, Dusseldorf, Germany (2014) ASME GT2014-26194.

    Google Scholar 

  17. J. Corman, H gas turbine combined cycle power generation system for the future, Proc. of Yokohama Gas Turbine Congress, Yokohama, Japan (1995).

    Google Scholar 

  18. I. Fukue, A new generation of advanced gas turbine, Yokohama International Gas Turbine Congress, Yokohama, Japan (1995).

    Google Scholar 

  19. B. Facchini, G. Ferrara and L. Innocenti, Blade cooling improvement for heavy duty gas turbine: the air coolant temperature reduction and the introduction of steam and mixed steam/air cooling, Int. J. Therm. Sci., 39 (2000) 74–84.

    Article  Google Scholar 

  20. O. Sanjay, O. Singh and B. N. Prasad, Influence of different means of turbine blade cooling on the thermodynamic performance of combined cycle, Appl. Therm. Eng., 28 (2008) 2315–2326.

    Article  Google Scholar 

  21. S. Kumar and O. Singh, Thermodynamic performance evaluation of gas turbine cycle with transpiration cooling of blades using air vis-à-vis steam, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 224 (2010) 1039–1047.

    Google Scholar 

  22. H. Nomoto, A. Koga, S. Ito, Y. Fukuyama, F. Otomo, S. Shibuya, M. Sato, Y. Kobayashi and H. Matsuzaki, The advanced cooling technology for the 1500°C class gas turbines: steam-cooled vanes and air-cooled blades, ASME J. Eng. Gas Turbines Power, 119 (1997) 624–632.

    Article  Google Scholar 

  23. J. Liu, J. Gao and T. Gao, An experimental investigation of heat transfer characteristics in a steam-cooled square channel with rib turbulators, Proceedings of ASME Turbo Expro 2011, ASME, Vancouver, Canada (2011) 1–6.

    Google Scholar 

  24. J. Liu, J. Gao and T. Gao, Forced convection heat transfer of steam in a square ribbed channel, JMST, 26 (2012) 1291–1298.

    Google Scholar 

  25. J. Liu, J. Gao, T. Gao and X. Shi, Heat transfer characteristics in steam-cooled rectangular channels with two opposite rib-roughened walls, Appl. Therm. Eng., 50 (2013) 104–111.

    Article  Google Scholar 

  26. L. Shui, J. Gao, L. Xu and X. Wang, Numerical investigation of heat transfer and flow characteristics in a steamcooled square ribbed duct, Proceedings of ASME Turbo Expo 2010: Power for Land, Sea and Air, ASME, Glasgow, UK (2010) 1–9.

    Google Scholar 

  27. L. Shui, J. Gao, X. Shi and J. Liu, Effect of duct aspect ratio on heat transfer and friction in steam-cooled ducts with 60° angled rib turbulators, Exp. Therm. Fluid. Sci., 49 (2013) 123–134.

    Article  Google Scholar 

  28. J. Y. Gong, T. Y. Gao and G. J. Li, Heat transfer and friction characteristics in steam cooled rectangular channels with rib turbulators, JMST, 28 (1) (2014) 357–364.

    Google Scholar 

  29. J. Y. Gong, T. Y. Gao and G. J. Li, Contrastive experimental study on heat transfer and friction characteristics in steam cooled and air cooled rectangular channels with rib turbulators, JMST, 28 (9) (2014) 3845–3854.

    Google Scholar 

  30. J. N. Zhu, T. Y. Gao, J. Li, G. J. Li and J. Y. Gong, The Effect of vortex core distribution on heat transfer in steam cooling of gas turbine blade internal ribbed channels, Proceedings of ASME Turbo Expo 2014, Dusseldorf, Germany (2014) ASME GT2014-25324.

    Google Scholar 

  31. S. J. Kline and F. McClintock, Describing uncertainties in single-sample experiments, Mechanical Engineering, 75 (1953) 3–8.

    Google Scholar 

  32. D. Walker and J. Zausner, RANS evaluations of internal cooling passage geometries: Ribbed passages and a 180 degree bend, Proceedings of ASME Turbo Expo 2007, Montreal, Canada (2007) ASME GT2007-27830.

    Google Scholar 

  33. J. Jeong and F. Hussain, On the identification of a vortex, J. Fluid Mech., 285 (1995) 69–94.

    Article  MathSciNet  MATH  Google Scholar 

  34. T. S. Griffith, L. Al-Hadhrami and J. C. Han, Heat transfer in rotating rectangular cooling channels (AR = 4) with angled ribs, J. Heat Trans., 124 (4) (2002) 617–625.

    Article  Google Scholar 

  35. M. Al-Qahtani, H. C. Chen and J. C. Han, A numerical study of flow and heat transfer in rotating rectangular channels (AR = 4) with 45 deg rib turbulators by Reynolds stress turbulence model, J. Heat Trans., 125 (1) (2003) 19–26.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Turbomachinery, School of Energy & Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China

    Tieyu Gao, Jiangnan Zhu, Changwei Liu & Jiamin Xu

Authors
  1. Tieyu Gao
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Jiangnan Zhu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Changwei Liu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Jiamin Xu
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Tieyu Gao.

Additional information

Tieyu Gao currently works at Xi’an Jiaotong University. His major research includes two-phase flow in turbomachinery and the air and steam cooling technology of gas turbine.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Gao, T., Zhu, J., Liu, C. et al. Numerical study of conjugate heat transfer of steam and air in high aspect ratio rectangular ribbed cooling channel. J Mech Sci Technol 30, 1431–1442 (2016). https://doi.org/10.1007/s12206-016-0251-1

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12206-016-0251-1

Keywords

Search

Navigation