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Proceedings of Symposium on Energy Engineering in the 21^{st} Century (SEE2000) Volume I-IV

ISBN Print: **1-56700-132-7 **

On the basis of the pure two-fluid model for turbulent reacting gas-particle flows with combusting pulverized coal particles, a new comprehensive model for pulverized coal combustion was developed by incorporating a modified k−ε−kp model, a general model of pulverized coal devolatilization and a general model of char combustion. Both gas-phase and particle-phase conservation equations are described in the Eulerian coordinates, and these equations are integrated in the computational cell to obtained finite-difference equations. As the first stage of numerical modeling of pulverized coal combustion in the cyclone furnace, three dimensional simulation of turbulent gas combustion and gas-particle flows have been made. Predicted results show that there is a near wall re-circulating zone at the bottom of the cyclone furnace, and the re-circulating zone enhances ignition and flame stabilization. Results of tangential velocity distribution of both gas phase and particle phase are similar to those of the Rankine vortex.

A. Budyka

V. Kirichenko ISBN Print: 978-1-56700-241-6

ISBN Online: 978-1-56700-240-9

Thermal Radiation in Disperse Systems: An Engineering Approach Leonid A. Dombrovsky

Dominique Baillis ISBN Print: 978-1-567000-268-3

ISBN Online: 978-1-56700-351-2