Modeling the slag layer in solid fuel gasification and combustion -- Two-way coupling with CFD
Name
Yong.Ghoniem_Modeling the Slag Layer in Solid Fuel Gasification and Combustion ─ Two-way Coupling with CFD_2012.pdf
Size
6.5 MB
Format
Adobe PDF
Checksum (MD5)
05e335a9184461f60d727b4c844bab4e
Author(s)
Yong, Sze Zheng
Ghoniem, Ahmed F
Date Issued
March 2012
Journal
Fuel
Publisher
Elsevier
Citation
Yong, Sze Zheng, and Ahmed Ghoniem. "Modeling the slag layer in solid fuel gasification and combustion -- Two-way coupling with CFD." Fuel 97 (July 2012): pp. 457-466.
Version
Author's final manuscript
Abstract
A steady-state model has been developed to describe the flow and heat transfer characteristics of slag that takes into consideration the contribution of the momentum of captured particles and the possibility of slag resolidification along the walls. The model also incorporates a criterion for particle capture or rebound. Captured particles flow with the local slag average velocity. Some of these particles may contain combustibles and they continue to burn at a different rate. To take this into account, a wall consumption submodel is proposed to predict a correction factor for the porous char consumption models. The slag flow model, along with the particle capture and consumption submodels are two-way coupled with a Computational Fluid Dynamics (CFD) of coal combustion, resulting in changing the discrete phase and temperature boundary conditions of the bulk flow simulations. The coupled CFD simulation shows that the wall traps about 56% of the coal particles fed to the combustor, while the wall temperature and heat flux to the wall are not significantly affected by the inclusion of a slag layer.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.fuel.2012.02.063
