Wind-aided flame spread under oblique forced flow

Tizón Pulido, Juan Manuel; Salvá Monfort, José Juan y Liñán Martínez, Amable (1999). Wind-aided flame spread under oblique forced flow. "Combustion and Flame", v. 119 (n. 1-2); pp. 41-55. ISSN 0010-2180. https://doi.org/10.1016/S0010-2180(99)00038-3.

Descripción

Título: Wind-aided flame spread under oblique forced flow
Autor/es:
  • Tizón Pulido, Juan Manuel
  • Salvá Monfort, José Juan
  • Liñán Martínez, Amable
Tipo de Documento: Artículo
Título de Revista/Publicación: Combustion and Flame
Fecha: Octubre 1999
Volumen: 119
Materias:
Palabras Clave Informales: Approximation theory; Boundary layers; Flow of fluids; Fuels; Gasification; Pyrolysis; Temperature; Velocity; Wind; Oblique forced flow; Wind aided flame; Combustion; flame; flow mechanics; article; flow rate; gas flow; gravity; priority journal; reaction analysis
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 (649kB) | Vista Previa

Resumen

he wind-aided flame spread process along a solid fuel rod under oblique forced flow is analyzed in absence of gravity or when the forced flow dominates the gravity-induced flow. The transverse velocity is large enough to ensure that mixing of the fuel vapors and air occurs in a thin boundary layer surrounding the fuel rod and we can use the boundary layer approximation to describe the gas-phase chemical reaction and downwind flame spread process. A global, second-order, Arrhenius expression is employed to describe the gas-phase reaction, while the solid surface gasification reaction is modeled in terms of a constant pyrolysis temperature. The solid is heated by the hot gases convected from the flame by the axial component of the velocity in the direction of the flame spread. The solid will be considered thermally thick, assuming the thickness of the heated layer in the solid to be small compared with the rod radius. The analysis determines the flame spread velocity and the flow structure in the flame front region. The analysis also shows that flame spread is not possible at large flow velocities due to finite rate effects, while at low velocities the gas-phase reaction is diffusion-controlled. By including radiation losses from the surface a flame spread limit, at low velocities, is also found in the present analysis. The wind-aided flame spread process along a solid fuel rod under oblique forced flow is analyzed in absence of gravity or when the forced flow dominates the gravity-induced flow. The transverse velocity is large enough to ensure that mixing of the fuel vapors and air occurs in a thin boundary layer surrounding the fuel rod and we can use the boundary layer approximation to describe the gas-phase chemical reaction and downwind flame spread process. A global, second-order, Arrhenius expression is employed to describe the gas-phase reaction, while the solid surface gasification reaction is modeled in terms of a constant pyrolysis temperature. The solid is heated by the hot gases convected from the flame by the axial component of the velocity in the direction of the flame spread. The solid will be considered thermally thick, assuming the thickness of the heated layer in the solid to be small compared with the rod radius. The analysis determines the flame spread velocity and the flow structure in the flame front region. The analysis also shows that flame spread is not possible at large flow velocities due to finite rate effects, while at low velocities the gas-phase reaction is diffusion-controlled. By including radiation losses from the surface a flame spread limit, at low velocities, is also found in the present analysis.

Más información

ID de Registro: 823
Identificador DC: http://oa.upm.es/823/
Identificador OAI: oai:oa.upm.es:823
Identificador DOI: 10.1016/S0010-2180(99)00038-3
URL Oficial: http://www.sciencedirect.com/science/journal/00102180
Depositado por: Archivo Digital UPM
Depositado el: 22 Abr 2009
Ultima Modificación: 20 Abr 2016 06:32
  • 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