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

Seiser, R. and Seshadri, K. and Piskernik, E. and 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.

Description

Title: Ignition in the viscous layer between counterflowing streams: asymptotic theory with comparison to experiments
Author/s:
  • Seiser, R.
  • Seshadri, K.
  • Piskernik, E.
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: Combustion and Flame
Date: August 2000
ISSN: 0010-2180
Volume: 122
Subjects:
Freetext Keywords: 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
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 833
DC Identifier: http://oa.upm.es/833/
OAI Identifier: oai:oa.upm.es:833
DOI: 10.1016/S0010-2180(00)00139-5
Official URL: http://www.sciencedirect.com/science/journal/00102180
Deposited by: Archivo Digital UPM
Deposited on: 27 Jan 2008
Last Modified: 20 Apr 2016 06:33
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