Influence of laminar flame speed on turbulent premixed combustion
A laminar flamelet model utilized with the Bray-Moss-Libby (1985) model to analyze premixed turbulent combustion is revised to include effects of pressure change across flamelets as well as those of chemical production and molecular transports. The revised model introduces the laminar flame speed as an important parameter and exposes a new mechanism for the countergradient diffusion flux of products. In contrast to the original model, contributions from the flamelets to the budget of the velocity fluctuation intensity are not necessarily dissipative, but possibly productive. In planar turbulent flames normal to oncoming flows, transverse components of the velocity fluctuation are amplified only by this effect. 30 references.
- Research Organization:
- National Aerospace Lab., Kakuda, Japan
- OSTI ID:
- 5239809
- Journal Information:
- Combust. Flame; (United States), Vol. 64
- Country of Publication:
- United States
- Language:
- English
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