Artículos de Energía >
Por favor, use este identificador para citar o enlazar este ítem:
|Título : ||Thermal expansion effect on the propagation of premixed flames in narrow channels of circular cross-section: Multiplicity of solutions, axisymmetry and non-axisymmetry|
|Autor : ||Dejoan, Anne|
Kurdyumov, Vadim N.
|Palabras clave : ||Premixed laminar flame propagation|
|Fecha de publicación : ||2019|
|Editorial : ||Elsevier|
|Citación : ||Anne Dejoan, Vadim N. Kurdyumov, Thermal expansion effect on the propagation of premixed flames in narrow channels of circular cross-section: Multiplicity of solutions, axisymmetry and non-axisymmetry, Proceedings of the Combustion Institute, Volume 37, Issue 2, 2019, Pages 1927-1935,|
|Resumen : ||The present study examines, in presence of thermal expansion effects, the existence of the multiplicity of solutions previously reported within the context of diffusive-thermal modeling in , for lean premixed flames with low Lewis number (Le < 1) propagating in narrow circular adiabatic channels subject to a Poiseuille flow. For this, direct numerical simulations have been carried out within the framework of variable-density Navier–Stokes equations and zero-Mach-number approximation. The simulations, conducted for both axisymmetric and three-dimensional cylindrical geometries, confirm the coexistence of multiple steady flame structures for a given flow rate. They show that axisymmetric flames concave towards the upstream are more unstable to three-dimensional perturbations than convex (toward the upstream) flames. This result evinces earlier findings obtained from stability analysis. The non-axisymmetry property of the flame is also found to push back the critical flashback limits at larger flow rate when compared to those predicted under the assumption of flame axisymmetry.|
|URI : ||http://documenta.ciemat.es/handle/123456789/659|
|Aparece en las colecciones: ||Artículos de Energía|
Los ítems de Docu-menta están protegidos por una Licencia Creative Commons, con derechos reservados.