The formation of (Al2O3)n clusters as a probable mechanism of aluminum oxide nucleation during the combustion of aluminized fuels: Numerical analysis
| Autor: | Alexander M. Starik, Alexander M. Savel'ev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Nucleation General Physics and Astronomy Energy Engineering and Power Technology chemistry.chemical_element Thermodynamics 02 engineering and technology Combustion 01 natural sciences law.invention Atmosphere Condensed Matter::Materials Science law Aluminium 0103 physical sciences Cloud condensation nuclei Physics::Chemical Physics 010304 chemical physics General Chemistry 021001 nanoscience & nanotechnology Ignition system Fuel Technology chemistry Particle 0210 nano-technology Stoichiometry |
| Zdroj: | Combustion and Flame. 196:223-236 |
| ISSN: | 0010-2180 |
| Popis: | The model of formation and growth of stoichiometric (Al2O3)n clusters during the combustion of aluminized fuels has been developed. In this model, the thermodynamic properties of large clusters (n = 5–75) have been determined by matching the thermodynamic properties of small clusters n = 2–4, calculated earlier by quantum-chemical methods, with similar characteristics of liquid droplets. The developed model was used for a numerical simulation of the formation of (Al2O3)n clusters during the combustion a single aluminum particle with a diameter of 200 μm in O2/Ar atmosphere. It has been shown that, during the first 12 ms after the aluminum particle ignition, the rapid growth of clusters occurs. The mass of clusters in the combustion zone is comparable to the mass of aluminum oxide. The modeling results indicate that the growth of (Al2O3)n clusters can be the most probable mechanism of the formation of condensation nuclei of alumina. |
| Databáze: | OpenAIRE |
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