Radiation-stimulated explosive evaporation and burning of hydrogen droplets in hot aerosol mixtures
| Autor: | Marina P. Marchenko, M. Khasin, V. V. Osipov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Explosive material Hydrogen Chemistry Evaporation Thermodynamics chemistry.chemical_element 02 engineering and technology Radiation Combustion Thermal conduction 01 natural sciences Oxygen Aerosol 020401 chemical engineering 0103 physical sciences 0204 chemical engineering 010306 general physics Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Applied Physics Letters. 108:244103 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4952446 |
| Popis: | We present results of analytical and numerical investigation of explosive evaporation and burning scenarios of hydrogen droplets in hydrogen/oxygen aerosols. The following two scenarios have been elucidated. The first scenario, corresponding to sufficiently large droplets, is characterized by three stages: (i) an essentially homogeneous heating of a droplet to a near-critical temperature by IR radiation from the hot gas; (ii) explosive evaporation; and (iii) burning of hydrogen cloud formed by evaporation. The second scenario, corresponding to small droplets, differs in that a droplet is heated mainly by thermal conduction from the hot gas. The heating is accompanied by evaporation which can become explosive at the final stage of evaporation. The crossover droplet size separating the two scenarios is calculated. Conservative finite-difference numerical analysis is used to explore the predicted scenarios and verify analytical estimates. |
| Databáze: | OpenAIRE |
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