Scalar dissipation and flame surface density in premixed turbulent combustion
| Autor: | Kenneth Noel Corbett Bray, Nedunchezhian Swaminathan |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Marketing
Premixed flame Surface (mathematics) Physics Work (thermodynamics) Laminar flame speed Basis (linear algebra) Turbulence Strategy and Management Thermodynamics Laminar flow Mechanics Physics::Fluid Dynamics Media Technology General Materials Science Physics::Chemical Physics Convection–diffusion equation |
| Zdroj: | Comptes Rendus Mécanique. 334:466-473 |
| ISSN: | 1631-0721 |
| DOI: | 10.1016/j.crme.2006.07.005 |
| Popis: | A new closed version of the transport equation for the flame surface density in premixed turbulent combustion is derived, on the basis of an equation for the scalar dissipation that has previously been proposed by the present authors. As in this earlier work, volume expansion due to heat release is found to have an important role in determining the flame surface density. An algebraic approximation to the transport equation is obtained, on the basis of an order-of-magnitude analysis, and is found to be in good agreement with data from DNS. Finally, laminar flame calculations are used to estimate a key parameter in the new model. To cite this article: K.N.C. Bray, N. Swaminathan, C. R. Mecanique 334 (2006). |
| Databáze: | OpenAIRE |
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