Coal combustion models for flame scaling
| Autor: | R.G. Williams, J.S. Truelove |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Waste management
Laminar flame speed business.industry Chemistry Coal combustion products Mechanics Combustion law.invention Adiabatic flame temperature Physics::Fluid Dynamics Ignition system law Heat transfer Combustor Coal Physics::Chemical Physics business Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Symposium (International) on Combustion. 22:155-164 |
| ISSN: | 0082-0784 |
| DOI: | 10.1016/s0082-0784(89)80021-9 |
| Popis: | A theoretical model of a coal flame is applied to interpret and extrapolate pilot-scale test furnace data. The flame model is based on the equations governing conservation of mass, momentum, species and energy and includes physical models for turbulence, volatiles combustion, radiation heat transfer and particle dispersion together with phenomenological models to describe coal devolatilization andchar combustion. Predictions of flow, temperature and species concentration are compared with measurements in the near-burner ignition zone of pilot-scale and full-scale-boiler flames. Agreement between the predictions and data is generally encouraging. The predictions suggest, and the measurements confirm, that flame characteristics near critical ignition are particularly sensitive to burner operating conditions. Testfurnace data for new high-moisture coals are extrapolated to predict flame stability for the thermal conditions in a full-scale boiler. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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