A calculation of the radiative source term in combustion processes is an important part of the simulation process, because high temperatures are involved and the coupling of radiation to chemistry affects the overall flame characteristics. While relatively simple gas absorption coefficient models have been used in the recent past, it is becoming clearer that more accurate gas models alter the distribution of radiative sources in the flame. To accurately evaluate the radiative losses, it is necessary to use gas models in which the gas absorption coefficient is wavelength dependent. Such analyses can be computationally expensive depending on the particular treatment of the spectral dependence. It is important to understand the relative costs and benefits of different treatment of these effects. In this work, the divergence of the radiative heat flux is calculated for a two-dimensional cylindrical axisymmetric chamber using four different models: a simple gray gas model, the weighted-sum-of-gray-gases (WSGG) model, the spectral line-based weighted-sum-of-gray-gases (SLW) model, and the cumulative wavenumber (CW) model. The gray gas model and the WSGG model are widely used in recent studies and in most commercial software, because they are simple to implement and provide fast results. In general, however, they are not able to accurately predict the radiative losses. On the other hand, the SLW and CW models detail the variations of the absorption coefficient with the wavelength, and can give more accurate answers for the radiative source term, but require bigger computational effort. The divergence of the radiative flux predictions are compared with these four models, using temperature and concentration fields obtained from previous numerical simulations. The overall differences in radiation properties and in the overall cost of computations are detailed.
Skip Nav Destination
Close
Sign In or Register for Account
2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4940-8
PROCEEDINGS PAPER
Spectral Gas Absorption Coefficient Model Effects on Radiative Source Term in a 2D Axisymmetric Diffusion Flame
Anderson C. Mossi
,
Anderson C. Mossi
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Search for other works by this author on:
Marcelo M. Galarc¸a
,
Marcelo M. Galarc¸a
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Search for other works by this author on:
Hora´cio A. Vielmo
,
Hora´cio A. Vielmo
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Search for other works by this author on:
Francis H. R. Franc¸a
,
Francis H. R. Franc¸a
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Search for other works by this author on:
Ofodike A. Ezekoye
Ofodike A. Ezekoye
The University of Texas at Austin, Austin, TX
Search for other works by this author on:
Anderson C. Mossi
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Vinayak V. Barve
Siemens, Orlando, FL
Marcelo M. Galarc¸a
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Hora´cio A. Vielmo
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Francis H. R. Franc¸a
Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Ofodike A. Ezekoye
The University of Texas at Austin, Austin, TX
Paper No:
IHTC14-22967, pp. 917-926; 10 pages
Published Online:
March 1, 2011
Citation
Mossi, AC, Barve, VV, Galarc¸a, MM, Vielmo, HA, Franc¸a, FHR, & Ezekoye, OA. "Spectral Gas Absorption Coefficient Model Effects on Radiative Source Term in a 2D Axisymmetric Diffusion Flame." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 5. Washington, DC, USA. August 8–13, 2010. pp. 917-926. ASME. https://doi.org/10.1115/IHTC14-22967
Download citation file:
- Ris (Zotero)
- Reference Manager
- EasyBib
- Bookends
- Mendeley
- Papers
- EndNote
- RefWorks
- BibTex
- ProCite
- Medlars
Close
Sign In
3
Views
0
Citations
Related Proceedings Papers
Related Articles
Generalized State-Property Relations for Nonluminous Flame Absorption Coefficients
J. Heat Transfer (February,1992)
Comparisons of Radiative Heat Transfer Calculations in a Jet Diffusion Flame Using Spherical Harmonics and k -Distributions
J. Heat Transfer (November,2014)
In Situ Detailed Chemistry Calculations in Combustor Flow Analyses
J. Eng. Gas Turbines Power (October,2001)
Related Chapters
Radiation
Thermal Management of Microelectronic Equipment
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Numerical Simulation Research on a Fixed Bed Gasifier
International Conference on Information Technology and Management Engineering (ITME 2011)