Coupled systems mechanics

  • 제1권3호
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  • Pages.285-295
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  • 2012
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  • 2234-2184(pISSN)
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  • 2234-2192(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

The comparison of radial and axial flow porous burners from viewpoint of output radiative heat transfer and emissions

  • Tabari, N. Ghiasi (Islamic Azad University-Dashtestan branch) ;
  • Astaraki, M.R. (Islamic Azad University-Dashtestan branch) ;
  • Arabi, A.H. (Islamic Azad University-Dashtestan branch)
  • 투고 : 2012.06.22
  • 심사 : 2012.09.11
  • 발행 : 2012.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, two types of porous burners with radial and axial flow have been modeled numerically and compared. For this purpose, governing equations were solved one-dimensionally for methane-air premix gas. The mechanism used in simulating combustion phenomenon was 15 stage reduced mechanism based on GRI3.0. In order to compare the two burners, the inlet flow rate and fuel-air ratio have been assumed equal for the two burners. The results of the study indicated that reduction in speed and increase in cross-section area in the direction of flow have a considerable influence on the behavior of radial burner in comparison to axial burner. Regarding temperature distribution inside the burner, it was observed that the two above mentioned factors can be influential in temperature of flame propagation region. Also, regarding distribution of CO and NO emission, the results indicate that the porous radial burner has lower emissions in comparison to the axial once. The output radiative heat transfer efficiency of the two burners was also compared and in this case also even the radial porous burner was found to be preferable.

키워드

참고문헌

  1. Amanda, J.B. and Janet, L.E. (2004), "Heat recirculation and heat transfer in porous burners", Combust. Flame, 137(1-2), 230-241. https://doi.org/10.1016/j.combustflame.2004.02.007
  2. Kamal, M.M., and Mohamad, A.A. (2006), ''Combustion in porous media'', Proceedings of the Institution of Mechanical Engineers, Aug.
  3. Kamal, M.M. and Mohamad, A.A. (2006), ''Developmentofcilyndricalporous-medium burner'', J. Porous Media, 9, 469-481. https://doi.org/10.1615/JPorMedia.v9.i5.70
  4. Kee, R., Grcar, J., Smooke, M. and Miller, J. (1985), A FORTRAN program for modeling steady laminar one dimensional premixed flames, Technical Report SAND85-8240, Sandia National Laboratories.
  5. Khosravi El-Hossaini, M. (2007), Modeling and numerical analysis of cylindrical porous radiant burner, Iran, Tehran, Tarbiat Modares University, PhD theses.
  6. Khosravy EL-Hossaini, M., Maerefat, M. and Mazaheri, K. (2008), ''Numerical investigation on the effects of pressure drop on thermal behavior of porous burner", J. Heat Trans.-T. ASME, 130, 032601-1. https://doi.org/10.1115/1.2804947
  7. Khosravy EL-Hossaini, M., Maerefat, M. and Mazaheri, K. (2008), "Numerical modeling of porous radiant burner using full and reduced kinetics mechanism", Iran. J. Chem. Chem. Eng., 27(1).
  8. Sung, C.J., Law, C.K. and Chen, J.Y. (2001), "Augmented reduced mechanisms for NO emission in methane oxidation", Combust. Flame, 125(1-2), 906-919. https://doi.org/10.1016/S0010-2180(00)00248-0
  9. Susie, W. and Andrew, T H. (2008), ''Porous burners for lean-burn applications'', Prog. Energ.Combust., 34(5),667-684. https://doi.org/10.1016/j.pecs.2008.04.003
  10. Turns, S.R. (2000), An introduction to combustion: concept and application, 2nd Ed., McGraw-Hill.
  11. Zhdanok, S.A., Dobrego, K.V. and Futko, S.I. (1998), ''Flame localization inside axis-symmetric cylindrical and sphericalporous media burners'', Int. J. Heat Mass Tran., 41(22), 3647-3655. https://doi.org/10.1016/S0017-9310(98)00058-1
  12. Zhdanok, S.A., Dobrego, K.V. and Futko, S.I. (2000), ''Effect of porous media transparency on spherical and cylindrical filtration combustion heater performance'', Int. J. Heat Mass Tran, 43(18), 3469-3480. https://doi.org/10.1016/S0017-9310(99)00320-8
  13. Zhou, X.Y. and Pereira, J.C.F. (1997), "Numerical study of combustion and pollutant formation in inert nonhomogeneous porous media", Combust. Sci. Technol., 130(1-6), 335-364. https://doi.org/10.1080/00102209708935748