Modelling of pulverised coal combustion by a Eulerian-Eulerian two-phase flow formulation. (18th May 2005)

• Record Type: Journal Article
• Authors: Benim, A.C.; Epple, B.; Krohmer, B.
• Is Part Of: Progress in computational fluid dynamics. Volume 5:Number 6(2005)
• Page Start: 345
• Page End: 361
• Publication Date: 2005-05-18
• Subjects: pulverised coal combustion -- Eulerian-Eulerian modelling -- two-phase flow -- combustion modelling -- CFD -- computational fluid dynamics; Fluid dynamics -- Data processing -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 620.10640285
• Languages: English
• ISSNs: 1468-4349

Abstract

This paper evaluates a Eulerian-Eulerian modelling of the dispersed two-phase flow in pulverised coal combustion. In contrast to the commonly employed Eulerian-Lagrangian procedures, which treat the gas phase by a Eulerian and the particulate phase by a Lagrangian frame of reference, the presently investigated approach applies a Eulerian description to both phases. In our implementation, the model is further simplified assuming a mechanical and thermal equilibrium between the phases. For validation, two- and three-dimensional furnaces with different thermal loads have been analysed. Results have been compared to those obtained by Eulerian-Lagrangian formulations and measurements. It has been shown that the present Eulerian-Eulerian approach provides a comparable overall accuracy to the Eulerian-Lagrangian formulation, with substantially lower CPU requirements for large-scale utility boilers, and, thus provides an attractive alternative for this bracket of problems.