Thermal/Turbulence Time Scale Ratios in Low Exothermic Reacting and Non-reacting Flows
| Autor: | M. Senouci, Iskender Gökalp, Abdelhamid Bounif |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Exothermic reaction
Turbulence Chemistry General Chemical Engineering Scalar (physics) Turbulence modeling General Physics and Astronomy Energy Engineering and Power Technology Thermodynamics General Chemistry Damköhler numbers Fuel Technology Physics::Chemical Physics Convection–diffusion equation Scalar field Order of magnitude |
| Zdroj: | Combustion Science and Technology. 181:36-67 |
| ISSN: | 1563-521X 0010-2202 |
| DOI: | 10.1080/00102200802575251 |
| Popis: | The aim of this work is to contribute to the study of chemistry effects on the turbulent scalar field that is, here, the temperature, through a better knowledge of the ratio between the scalar time scale and the mechanical time scale (Rt) in the distributed reaction regime characterized by a Damkohler number lower than unity. The numerical studies are performed by calculating the order of magnitude of Rt in both low exothermic reacting and non-reacting case. Propane has been chosen as a typical hydrocarbon for this study. The molar fractions are computed by the IEM (Interaction Exchange with the Mean) model in which the probability density function is calculated from its transport equation. The models and the numerical simulations are used to describe a jet stirred reactor with subsonic jet injection. The predictions are validated by comparison with experimental data for temperature and concentrations fields. It is pointed that in the non-reacting case, Rt parameter is around unity; the temporal scales dy... |
| Databáze: | OpenAIRE |
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