On the stability of one-dimensional diffusion flames established between plane, parallel, porous walls
| Autor: | Indrek S. Wichman, Robert Vance, Milan Miklavčič |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Convection
Plane parallel One dimensional diffusion Chemistry General Chemical Engineering General Physics and Astronomy Energy Engineering and Power Technology General Chemistry Mechanics System of linear equations Stability (probability) Lewis number Physics::Fluid Dynamics Fuel Technology Modeling and Simulation Physics::Chemical Physics Porosity Eigenvalues and eigenvectors |
| Zdroj: | Combustion Theory and Modelling. 5:147-161 |
| ISSN: | 1741-3559 1364-7830 |
| DOI: | 10.1088/1364-7830/5/2/302 |
| Popis: | A one-dimensional, non-premixed flame stability analysis is undertaken. Oscillatory and cellular flame instabilities are identified by a careful study of the numerically calculated eigenvalues of the linearized system of equations. The numerical investigation details the critical locations for changes in flame behaviour, as well as the critical values of various parameters that affect flame stability. A critical Lewis number, greater than unity, is identified as the value where unstable oscillations may begin to appear (Le > Lec) and for which cellular flames can exist (Le < Lec). Some prior discussions are clarified regarding the aforementioned critical values, as well as the role of convection in producing flame instabilities. The methodology of the stability analysis is discussed in detail. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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