Droplet decomposition in a reactive atmosphere: Complete responses for large activation energies
| Autor: | G. S. S. Ludford, H.V. McConnaughey |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Arrhenius equation
Materials science Thermodynamics Statistical and Nonlinear Physics Rocket propellant Activation energy Condensed Matter Physics Combustion Decomposition Monopropellant Atmosphere Damköhler numbers symbols.namesake symbols Physics::Chemical Physics Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Physica D: Nonlinear Phenomena. 9:209-224 |
| ISSN: | 0167-2789 |
| DOI: | 10.1016/0167-2789(83)90299-3 |
| Popis: | A two-step combustion process, consisting of monopropellant (i.e. one-reactant) burning followed by bipropellant (i.e. two-reactant) burning, is considered. The original reactant, namely vapor from a liquid droplet, decomposes into a fuel that combines with oxidant in the surrounding atmosphere. Complete responses M ( D 1 , D 2 ) of the evaporation rate M of the droplet to the Damkohler numbers D 1 , D 2 of the two reactions are determined in the limit of large activation energies. Conditions under which the response is monotonic or multi-valued (thereby exhibiting auto-ignition and auto-extinction) are identified. Previous conjectures, based on Damkohler-number asymptotics, are found to be mostly correct. Once more the efficacy of activation-energy asymptotics in dealing with the strongly nonlinear Arrhenius term of reactive fluid mechanics is demonstrated. |
| Databáze: | OpenAIRE |
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