Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Optimization of Angled Ribs for Heat Transfer Enhancement in a Square Channel with Bleed Flow

유출유동을 가진 정사각유로 내 열전달 향상을 위한 경사진 요철 최적설계

  • 이현 (연세대학교 대학원 기계공학과) ;
  • 김경민 (연세대학교 대학원 기계공학과) ;
  • 이동현 (연세대학교 대학원 기계공학과) ;
  • 조형희 (연세대학교 기계공학부)
  • Published : 2008.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, the second order response surface method (RSM) is carried out to get optimum thermal design for enhancing heat transfer in a square channel with bleed flow. The RSM is used as an optimization technique. To calculate the heat transfer, RNG k-epsilon model and enhanced wall function are used. To design optimum rib turbulators, two design variables such as attack angle of rib $({\alpha})$ and rib pitch-to-rib height ratio (p/e) are optimized. In these analyses, the channel inlet Reynolds number was fixed at 10,000 in both non-bleeding and bleeding cases. The response surfaces of two design variables are constructed in cases with and without bleed flow. As a result, the optimum (or highest) heat transfer values are almost the same in ranges of two cases with and without bleed flow. However, the friction losses in the case with bleed flow are lower than those without bleed flow.

Keywords

References

  1. Han, J. C., Dutta, S. and Ekkad, S. V., 2000, Gas Turbine Heat Transfer and Cooling Technology, Taylor & Francis
  2. Han, J. C, Park, J. S. and Lei, C. K., 1985, 'Heat Transfer Enhancement in Channels with Turbulence Promoters,' ASME J. of Eng. for Gas Turbines and Power, Vol. 107, pp. 628-635 https://doi.org/10.1115/1.3239782
  3. Kim, H. M. and Kim, K. Y., 2004, 'Design Optimization of Rib-roughened Channel to Enhance Turbulent Heat Transfer,' Int. J. of Heat and Mass Transfer, Vol. 47, pp. 5159-5168 https://doi.org/10.1016/j.ijheatmasstransfer.2004.05.035
  4. Kim, H. M. and Kim, K. Y., 2006, 'Shape Optimization of Three-dimensional Channel Rough ened by Angled Ribs with RANS Analysis of Turbulent Heat Transfer,' Int. J. of Heat and Mass Transfer, Vol. 49, pp. 4013-4022 https://doi.org/10.1016/j.ijheatmasstransfer.2006.03.039
  5. Douglas, T. and Philip, P., 2000, 'Experimental Heat Transfer and Bulk Air Temperature Measure ments for a Multipass Internal Cooling Model with Ribs and Bleed,' ASME Paper No. 2000-GT-233
  6. Park, S. H., Jeon, Y. H., Kim, K. M., Lee, D. H. and Cho, H. H., 2007, 'Effects of Bleed Flow and Angled Ribs on Heat Transfer Distributions in a Rotating Square Channel,' Trans. of KSME(B), Vol. 31, No. 1, pp. 76-82 https://doi.org/10.3795/KSME-B.2007.31.1.076
  7. Rigby, D. L., Steinthorsson, E. and Ameri, A. A., 1997, 'Numerical Prediction of Heat Transfer in a Channel with Ribs and Bleed,' ASME Paper No. 96-GT-431
  8. Stephens, M. A., Shih, T. I. and Civinskas, K. C., 1995, 'Computation of Flow and Heat Transfer in a Rectangular Channel with Ribs,' AIAA Paper No. 95-0180
  9. Fluent Inc., 2003, Fluent 6.2 User's Guide
  10. Myers, R. H. and Montgomery, C. C., 2002, Response Surface Methodology: Progress and Product Optimization Using Designed Experiments, John Wiley & Sons
  11. Toby, J. Mitchell., 1973, 'An Algorithm for the Construction of D-Optimal Experimental Designs,' Technometrics, Vol. 16, No. 2, pp. 203-210
  12. Han, J. C., Park, J. S. and Lei, C. K., 1985, 'Heat Transfer Enhancement in Channels With Tur bulence Promoters,' ASME J. of Engineering for Gas Turbines and Power, Vol 107, pp. 628-635 https://doi.org/10.1115/1.3239782
  13. Han, J. C. and Park, J. S., 1988, 'Developing Heat Transfer in Rectangular Channels with Rib Turbulators,' Int. J. of Heat Mass Transfer, Vol. 31, pp. 183-195 https://doi.org/10.1016/0017-9310(88)90235-9
  14. Wu, S. J., Kim, W. S. and Cho, H. H., 1998, 'Augmented Heat Transfer in a Rectangular Duct with Angled Ribs,' Trans. of KSME(B), Vol. 22, No. 4, pp 530-541

Cited by

  1. A Study on the Model of Thermal Plume Flow in the Forest Fire vol.12, pp.1, 2009, https://doi.org/10.5293/KFMA.2009.12.1.007
  2. vol.12, pp.1, 2009, https://doi.org/10.5293/KFMA.2009.12.1.070