Advertisement

Applied Mathematics and Mechanics

, Volume 34, Issue 5, pp 577–588 | Cite as

Validation of 1D model for methane/air/Pt combustion in stagnation flow

  • Ming-hou Liu (刘明候)Email author
  • Dan Xing (邢丹)
  • Yu-zhou Lu (陆雨洲)
  • Hui-yuan Zhu (朱会元)
Article
  • 145 Downloads

Abstract

A 2D model is built on the package of FLUENT to study the effects of radial aspect ratio (R/W), length-to-width ratio (L/W), strain rate (S R), and buoyancy (Ri=Gr/Re 2) on the validation of the simplified 1D model. In the present 2D model, the methane/air homogeneous reaction mechanism of Peters and the methane/air/platinum heterogeneous reaction mechanism of Deutschmann are applied. By comparison between the 1D and 2D numerical results, it is found that the validation of 1D model is highly related with the catalytic stagnation reactor configuration. For length-to-width ratio L/W = 1 configuration, 1D laminar model is applicable when the radial aspect ratio R/W > 0.4. For R/W = 0.6, the reactor exhibited 1D characteristics when L/W < 1. Compared with the temperature and species profiles, the velocity distribution along the axis is more sensitive to the change of radial aspect ratio and length-to-width ratio. With increasing of the strain rate, the flame front goes closer to the catalytic wall surface and the difference between the 1D and 2D results decreases. For a valid 1D simulation, it is recommended that the strain rate should be greater than 20 s-1. The effects of natural convection can be neglected when Ri < 5.

Key words

stagnation flow catalytic reaction validation of 1D model 

Chinese Library Classification

O362 

2010 Mathematics Subject Classification

80A32 76V05 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Coltrin, M. E., Kee, R. J., Rupley, F. M., and Meeks, E. Surface Chemkin-iii: a Fortran Package for Analyzing Heterogeneous Chemical Kinetics at a Solid-Surface, Gas-Phase Interface, SAND96-8217, Sandia National Laboratories (1996)CrossRefGoogle Scholar
  2. [2]
    Deutschmann, O., Maier, L. I., Riedel, U., Stroenrman, A. H., and Dibble, R. W. Hydrogen assisted catalytic combustion of methane on platinum. Catalysis Today, 59(1–2), 141–150 (2000)CrossRefGoogle Scholar
  3. [3]
    Zhong, B. J. and Wu, H. Numerical simulation on catalytic combustion of CH4/air in microchannel (in Chinese). Journal of Combustion Science and Technology, 11(1), 1–5 (2005)Google Scholar
  4. [4]
    Chen, G. B., Chen, C. P., Wu, C. Y., and Chao, Y. C. Effects of catalytic walls on hydrogen/air combustion inside a micro-tube. Applied Catalysis A: General, 332, 89–97 (2007)CrossRefGoogle Scholar
  5. [5]
    Li, Y. H., Chen, G. B., Hsu, H. W., and Chao, Y. C. Enhancement of methane combustion in microchannels: effects of catalyst segmentation and cavities. Chemical Engineering Journal, 160, 715–722 (2010)CrossRefGoogle Scholar
  6. [6]
    Chen, G. B., Chao, Y. C., and Chen, C. P. Enhancement of hydrogen reaction in a micro-channel by catalyst segmentation. International Journal of Hydrogen Energy, 33, 2586–2595 (2008)CrossRefGoogle Scholar
  7. [7]
    Li, J. J. and Im, H. G. Extinction characteristics of catalyst-assisted combustion in a stagnation-point flow reactor. Combustion and Flame, 145, 390–400 (2006)CrossRefGoogle Scholar
  8. [8]
    Yuan, T., Lai, Y. H., and Chang, C. K. Numerical studies of heterogeneous reaction in stagnation flows using one-dimensional and two-dimensional Cartesian models. Combustion and Flame, 154, 557–568 (2008)CrossRefGoogle Scholar
  9. [9]
    Park, Y. K., Bui, P. A., and Vlachos, D. G. Operation regimes in catalytic combustion: H2/air mixtures near Pt. AIChE Journal, 44(9), 2035–2043 (1998)CrossRefGoogle Scholar
  10. [10]
    Chao, Y. C., Chen, G. B., and Hsu, H. W. Catalytic ignition of multi-fuels on platinum: effect of strain rate. Catalysis Today, 83, 97–113 (2003)CrossRefGoogle Scholar
  11. [11]
    FLUENT6.2.16. User’s Guideline, FLUENT Inc., U. S.A. (2003)Google Scholar
  12. [12]
    Xu, K., Liu, M. H., Xing, D., Wang, Y. Q., Liu, D., and Lu, Y. 1D and 2D numerical simulation of catalytic combustion at stagnation point (in Chinese). Journal of Engineering Thermophysics, 31(10), 1775–1779 (2010)Google Scholar
  13. [13]
    Redenius, J. M., Schmidt, L. D., and Deutschmann, O. M. Catalytic wall reactors: I. radiant burner. AIChE Journal, 47, 1177–1184 (2001)CrossRefGoogle Scholar
  14. [14]
    Coltrin, M. E., Kee, R. J., Evans, G. H., Meeks, E., Rupley, F. M., and Grcar, J. F. A Fortran Program for Modeling One-Dimensional Rotating-Disk/Stagnation-Flow Chemical Vapor Deposition Reactors, SAND91-8003, Sandia National Laboratories (1991)CrossRefGoogle Scholar
  15. [15]
    Xu, K., Liu, M. H., Cai, X. D., and Chen, Y. L. Effect of surface catalytic reaction on homogeneous premixed combustion. Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007, 93-100 (2007)Google Scholar
  16. [16]
    Mauss, F. and Peters, N. Reduced kinetic mechanisms for premixed methane-air flames. Reduced Kinetic Mechanisms for Application in Combustion Systems, 15, 58–75 (1993)CrossRefGoogle Scholar
  17. [17]
    Houtman, C., Graves, D. B., and Jensen, K. F. CVD in stagnation point flow. Journal of the Electrochemical Society, 113, 961–970 (1986)CrossRefGoogle Scholar
  18. [18]
    Evans, G. and Grief, R. A numerical model of the flow and heat transfer in a rotating disk chemical vapor deposition reactor. Journal of Heat Transfer, 109, 928–935 (1987)CrossRefGoogle Scholar
  19. [19]
    Evans, G. H. and Greif, R. Forced flow near a heated rotating disk: a similarity solution. Numerical Heat Transfer, 14, 373–387 (1988)zbMATHCrossRefGoogle Scholar

Copyright information

© Shanghai University and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Ming-hou Liu (刘明候)
    • 1
    Email author
  • Dan Xing (邢丹)
    • 1
  • Yu-zhou Lu (陆雨洲)
    • 1
  • Hui-yuan Zhu (朱会元)
    • 1
  1. 1.Department of Thermal Science and Energy EngineeringUniversity of Science and Technology of ChinaHefeiP. R. China

Personalised recommendations