Extinction characteristics of a stretched cylindrical premixed flame
โ Scribed by Hideaki Kobayashi; Michio Kitano
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 605 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0010-2180
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โฆ Synopsis
An axially stretched, cylindrical premixed flame was formed by using a radial-flow nozzle burner, which made it possible to produce a highly stretched flow field in laminar conditions and to investigate the extinction characteristics of the flame over a wide range of equivalence ratios. Using this burner, extinction limits and flame diameters at the limits were measured for both methane-air and propane-air mixtures, and the data were compared with those of the counterflow twin flames reported before. The results are discussed from the viewpoint of the investigation of the flame curvature effects on the extinction characteristics of the stretched flame.
๐ SIMILAR VOLUMES
A theory is developed to explain the experimentally observed extinction of premixed flames by steep pressure drops. The full nonlinear equations are solved numerically and it is found that for large, rapid pressure drops the flame does not recover. This is taken to be clear evidence of extinction. M
An axially stretched cylindrical flame with heat loss to the upstream porous wall, through which a fresh mixture was assumed to percolate, was theoretically analyzed and the characteristics of the flame, which was simultaneously subjected to every effect of stretch, curvature, and heat loss, were in
This paper reports numerical investigations on the e!ects of #ow"eld unsteadiness on the structure and extinction of strained laminar non-premixed #ames. The unsteady conservation equations of mass, momentum, energy and species were solved along the stagnation streamline of an opposed jet counter#ow