Triple flames in mixing layers with nonunity Lewis numbers

Daou, J. y Liñán Martínez, Amable (1998). Triple flames in mixing layers with nonunity Lewis numbers. En: "27 Symposium (International) on Combustion", Aug 2-7, 1998, Colorado at Boulder, Boulder, Colorado.

Descripción

Título: Triple flames in mixing layers with nonunity Lewis numbers
Autor/es:
  • Daou, J.
  • Liñán Martínez, Amable
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 27 Symposium (International) on Combustion
Fechas del Evento: Aug 2-7, 1998
Lugar del Evento: Colorado at Boulder, Boulder, Colorado
Título del Libro: Twenty-Seventh Symposium (International) on Combustion/The Combustion Institute
Fecha: 1998
Materias:
Palabras Clave Informales: Activation energy; Combustion; Mathematical models; Mixtures; Nonunity Lewis numbers; Flame research
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (131kB) | Vista Previa

Resumen

The present paper is devoted to the study of the effects of nonunity Lewis numbers on triple-flame propagation in nonuniform mixtures. For definiteness, the case of a strained reactive mixing layer is considered. The fuel and oxidizer that are fed to the mixing layer are allowed to have different initial temperatures. Specifically, we examine how the triple flames encountered in this context are influenced by (a) the transverse gradients in the temperature and composition of the fresh reactive mixture and (b) by differential-diffusion effects. The analysis is carried for a single irreversible reaction with a large activation energy and using the thermo-diffusive model. Analytical expressions describing the flame shape, the local burning speed, and the propagation velocity of the triple flame are obtained. In particular, it is found that the Lewis numbers affect the propagation of the triple flame in a way similar to that obtained in the studies of stretched premixed flames. For example, the flame curvature determined by the transverse gradients in the frozen mixing layer leads to flame-front velocities that grow with decreasing values of the Lewis numbers.

Más información

ID de Registro: 878
Identificador DC: http://oa.upm.es/878/
Identificador OAI: oai:oa.upm.es:878
Depositado por: Archivo Digital UPM
Depositado el: 03 Mar 2008
Ultima Modificación: 20 Abr 2016 06:34
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM