Results 261 to 270 of about 61,419 (308)
Some of the next articles are maybe not open access.
Flame wall interaction: effect of stretch
Experimental Thermal and Fluid Science, 2003An experimental study of flame-wall interaction is presented. The flame is a laminar, flat methane-air one at three different equivalent ratio: 1, 0.8, 0.6. Temporal PIV system was used to acquire images sequences of the interaction. Evolution of velocity field and flame contour shows that stagnation points appear between the reactive zone and the wall.
Foucher, Fabrice +5 more
openaire +4 more sources
IMPACT OF STRETCH ON THE FLAME DYNAMICS OF LAMINAR PREMIXED FLAMES
Inter-Noise 2022, 2023Flame transfer functions (FTF) of laminar premixed flames acoustically forced are analytically investigated and modelled. The study is based on the linearized G-equation, which is used to kinematically track the flame front. In order to incorporate combustion properties, the laminar consumption speed is considered varying depending on the flame front ...
Edoardo Scoletta, Wolfgang Polifke
openaire +1 more source
Flame/stretch interactions in laminar and turbulent premixed flames
Combustion Science and Technology, 2002The flame/stretch interactions of laminar and turbulent premixed flames are considered both experimentally and computationally. Potentially strong effects of flame/stretch interactions due to preferential-diffusion phenomena within practical turbulent premixed flames were suggested by experiments and numerical simulations of spherical outwardly ...
Aung, KT +5 more
openaire +2 more sources
Dioxin formation in stretched flames
Chemosphere, 1992Numerical simulations of stretched laminar twin premixed flames are carried out in order to understand the gasphase formation of dioxins in situations analogous to the post combustor and following regions of a typical incinerator. A previously developed chemical kinetic mechanism, that describes dioxin formation in terms of some generic species, is ...
Murali Avula, Ishwar K. Puri
openaire +1 more source
Combustion Science and Technology, 1983
Abstract A general invariant expression is derived for the stretch experienced by a flame due either to its motion or to the nonuniform flow of the gas through it. This expression is given in terms of the local fluid velocity and the shape of the flame front. Specific examples in which the flame stretch takes a simplified form are discussed.
openaire +1 more source
Abstract A general invariant expression is derived for the stretch experienced by a flame due either to its motion or to the nonuniform flow of the gas through it. This expression is given in terms of the local fluid velocity and the shape of the flame front. Specific examples in which the flame stretch takes a simplified form are discussed.
openaire +1 more source
The cylindrical stretched flame
Combustion and Flame, 1984For sufficiently cool remote gases, the cylindrical stretched flame shows classical ignition-extinction behavior. For remote gas temperatures close to the adiabatic flame temperature, the flame response is qualitatively different, with negative flame speed solutions which may be physically accessible.
openaire +1 more source
Stretched spherical cap flames
Combustion and Flame, 1986Abstract Convex spherical cap flames with negative flame stretch and concave spherical cap flames with positive flame stretch are analyzed using activation energy asymptotics. A minimum flame radius is calculated for concave flames and this results is favorably compared with experimental data on quenching diameters.
openaire +1 more source
Symposium (International) on Combustion, 1989
Recent advances in the understanding of the structure, propagation, and extinction of laminar flames under the influence of stretch, as manifested by the existence of flame curvature, flow nonuniformity, and flame motion, are reviewed. The emphasis is on premixed flames because of the richness and subtlety of the phenomena involved.
openaire +1 more source
Recent advances in the understanding of the structure, propagation, and extinction of laminar flames under the influence of stretch, as manifested by the existence of flame curvature, flow nonuniformity, and flame motion, are reviewed. The emphasis is on premixed flames because of the richness and subtlety of the phenomena involved.
openaire +1 more source
Flame stretch analysis in diffusion flames with inert gas
Journal of Thermal Science, 2001Experimental investigations of impinging flame with fuel mixed with non-reaction gas were conducted. According to the observations of combustion test and temperature measurement, the non-reaction gas might dilute the local concentration of fuel in the diffusion process. The shape of the flame was symmetrical due to the flame stretch force. Results show
Ay Su, Ying-Chieh Liu
openaire +1 more source
A generalization of the Thickened Flame model for stretched flames
Combustion and Flame, 2023The Thickened Flame (TF) model is a widely used approach for Large Eddy Simulation of premixed flames. It is based on a “mapping” transformation where all diffusivities are multiplied by a thickening factor F while reaction terms are divided by F. Theory shows and 1D flame simulations confirm that this mapping preserves the unstretched laminar flame ...
Detomaso, Nicola +4 more
openaire +2 more sources