Ignition in the viscous layer between counterflowing streams: asymptotic theory with comparison to experiments

Seiser, R.; Seshadri, K.; Piskernik, E. y Liñán Martínez, Amable (2000). Ignition in the viscous layer between counterflowing streams: asymptotic theory with comparison to experiments. "Combustion and Flame", v. 122 (n. 3); pp. 339-349. ISSN 0010-2180. https://doi.org/10.1016/S0010-2180(00)00139-5.

Descripción

Título: Ignition in the viscous layer between counterflowing streams: asymptotic theory with comparison to experiments
Autor/es:
  • Seiser, R.
  • Seshadri, K.
  • Piskernik, E.
  • Liñán Martínez, Amable
Tipo de Documento: Artículo
Título de Revista/Publicación: Combustion and Flame
Fecha: Agosto 2000
Volumen: 122
Materias:
Palabras Clave Informales: decane; fuel; heptane; oxygen; toluene; article; chemical reaction; chemical reaction kinetics; combustion; countercurrent flow; energy; experiment; flow rate; laminar flow; mathematical computing; mathematical model; priority journal; technique; temperature; theory; viscosity
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A formulation is given for describing ignition in nonpremixed systems. Steady laminar flow of two counterflowing streams toward a stagnation plane is considered. One stream comprises fuel and the other oxygen. The characteristic Reynolds numbers of the counterflowing streams are presumed to be large so that the thickness of the viscous layer formed in the vicinity of the stagnation plane is small. The chemical reaction between fuel and oxygen that takes place in the viscous layer is described by a one-step overall process. The activation energy of the reaction is presumed to be large in comparison to the thermal energy. The asymptotic theory developed here makes available explicit formulae for predicting ignition in the viscous layer. From these results a simple but reasonably accurate method is developed for deducing the activation energy, E, and frequency factor, B, of the rate of the one-step reaction between the fuel and oxygen. To illustrate the application of this method, experiments are carried out in the counterflow configuration. The fuels tested are n-heptane, n-decane, JP-10, and toluene. Experimental data obtained are the velocities and temperatures of counterflowing streams at ignition. Values of E and B are obtained by using the experimental data in the formulae given by the asymptotic theory. These values of E and B are found to agree well with those obtained from numerical calculations.

Más información

ID de Registro: 833
Identificador DC: http://oa.upm.es/833/
Identificador OAI: oai:oa.upm.es:833
Identificador DOI: 10.1016/S0010-2180(00)00139-5
URL Oficial: http://www.sciencedirect.com/science/journal/00102180
Depositado por: Archivo Digital UPM
Depositado el: 27 Ene 2008
Ultima Modificación: 20 Abr 2016 06:33
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