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http://dx.doi.org/10.3795/KSME-B.2005.29.12.1321

Effects of Coal Particle Array on Coal Combustion  

Cho, Chong-Pyo (고려대학교 대학원 기계공학과)
Kim, Ho-Young (고려대학교 기계공학과)
Chung, Jin-Taek (고려대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.12, 2005 , pp. 1321-1328 More about this Journal
Abstract
The burning characteristics of interacting coal particles in a convective flow are numerically investigated at various Reynolds numbers. The transient combustion of 2-dimensionally arranged particles, both the fixed particle distances of 5 radii to 20 radii horizontally and 4 radii to 24 radii vertically, is studied. The results obtained from the present numerical analysis indicate that the transient flame configuration and retardation of particle temperature augmentation with the horizontal or vertical particle spacing substantially influence devolatilization process and carbon conversion ratio of interacting particles. Volatile release and carbon conversion ratio of the second particle with decreasing horizontal and vertical particle spacing decrease gradually, whereas those of the first particle with decreasing vertical particle spacing increase due to flow acceleration. When the vertical particle spacing is smaller than $6R_0$, volatile release and carbon conversion ratio of the second particle decrease due to reduction of flame penetration depth and interference of oxygen diffusion by the first particle.
Keywords
Carbon Conversion Ratio; Devolatiliztion; Horizontal Particle Spacing; Vertical Particle Spacing;
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