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Title: Structural study of non-premixed tubular hydrocarbon flames

Tubular non-premixed flames are formed by a uniquely designed opposed tubular burner. Structural measurements of hydrocarbon flames are conducted using the laser-induced Raman scattering technique. Temperature and major species concentrations are recorded for flames produced by 30% CH{sub 4}/N{sub 2} and 15% C{sub 3}H{sub 8}/N{sub 2} burning against air. Numerical simulations of these flames with detailed chemistry show good agreement between the measured and simulated results. By comparing the numerical results of the tubular curved flames to those of the opposed-jet planar flames, it is shown that flame curvature towards the fuel stream strongly effects the temperature ({+-}80 K) of flames with low fuel Lewis number (15% H{sub 2}/N{sub 2}, Le{sub f} = 0.41). The effect of curvature on flames with high (15% C{sub 3}H{sub 8}/N{sub 2}, Le{sub f} = 1.51) and near-unity (30% CH{sub 4}/N{sub 2}, Le{sub f}{approx_equal}1) fuel Lewis numbers is much less. (author)
Authors:
;  [1]
  1. Mechanical Engineering Department, Vanderbilt University, Nashville, TN 37235 (United States)
Publication Date:
OSTI Identifier:
21227374
Resource Type:
Journal Article
Resource Relation:
Journal Name: Combustion and Flame; Journal Volume: 156; Journal Issue: 1; Other Information: Elsevier Ltd. All rights reserved
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; METHANE; PROPANE; FLAMES; AIR; FUELS; HYDROGEN; CONFIGURATION; LEWIS NUMBER; SIMULATION; BURNERS; COMBUSTION KINETICS; NITROGEN; TUBES