Abstract
Turbulent diffusion of gas components (e.g., oxygen and
volatile matter) and dispersion of solid fuel particles
strongly affect the combustion process in a circulating
fluidized bed (CFB). A deeper understanding of these
mixing processes would improve our possibilities to model
CFB combustion. In the present paper, fluctuation
characteristics obtained as a result of transient CFD
simulations of two CFBs are presented. A simple estimate
of the diffusion coefficient can be determined based on
the velocity fluctuations and the Lagrangian time scale.
Here, the Lagrangian time scale is estimated by the
Eulerian time scale, which is determined by
auto-correlating time series data from a number of
monitoring points
| Original language | English |
|---|---|
| Title of host publication | 21st International Conference on Fluidized Bed Combustion Proceedings Volume 2 |
| Place of Publication | Napoli, Italia |
| Pages | 595-602 |
| Publication status | Published - 2012 |
| MoE publication type | A4 Article in a conference publication |
| Event | 21st International Conference on Fluidized Bed Combustion, 21FBC - Napoli, Italy Duration: 3 Jun 2012 → 6 Jun 2012 |
Conference
| Conference | 21st International Conference on Fluidized Bed Combustion, 21FBC |
|---|---|
| Abbreviated title | 21FBC |
| Country/Territory | Italy |
| City | Napoli |
| Period | 3/06/12 → 6/06/12 |
Keywords
- Circulating fluidized bed
- CFD
- time scales
- dispersion coefficients