Variation of equivalence ratio and element ratios in low-pressure premixed flames of aliphatic fuels Metadata

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Title

  • Main Title Variation of equivalence ratio and element ratios in low-pressure premixed flames of aliphatic fuels

Creator

  • Author: Pope, C. J.
    Creator Type: Personal
  • Author: Miller, J. A.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: US Department of Energy (United States)

Publisher

  • Name: Sandia National Laboratories
    Place of Publication: Albuquerque, New Mexico
    Additional Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)

Date

  • Creation: 2000-03-14

Language

  • English

Description

  • Content Description: In previously published work it was found that the element ratios (such as C/O, H/O, H/C) and the equivalence ratio all varied in the flame zone of a low-pressure premixed fuel-rich benzene/oxygen/argon laminar flat flame. These variations were seen from analyses of both the data and detailed kinetic modeling. In the present work, seven additional flames were analyzed in the same manner, including five flames with a single hydrocarbon fuel (methane, acetylene, ethylene, allene, and propene) and two flames with a mixture of fuels (acetylene/allene, hydrogen/allene). All the flames had argon as the diluent, with pressures between 20 and 37.5 Torr, equivalence ratios between 1.6 and 2.5, cold gas velocities between 42 and 126 cm/sec. All of these flames showed variations in the element ratios and equivalence ratios. Furthermore, these variations changed in a consistent pattern with respect to the molecular weight of the fuel. In the flame zone, the percent change in the H/O, C/O and equivalence ratios increased with increasing molecular weight of the fuel, except for the hydrogen/allene flame in which the C/O ratio first increases, then decreases in the flame zone. Also, unlike all the other hydrocarbon flames, the C/O ratio decreases below its inlet value for the methane flame. The H/O and equivalence ratios decrease below their inlet values for the hydrogen/allene flame. These results are explained in terms of differential diffusion effects between the products and the reactants, which increase as the fuel becomes increasingly heavier than the major carbon- and hydrogen-containing products.
  • Physical Description: 34 p.

Subject

  • STI Subject Categories: 08 Hydrogen
  • Keyword: Acetylene
  • STI Subject Categories: 02 Petroleum
  • Keyword: Chemical Composition
  • Keyword: Hydrogen Fuels
  • Keyword: Propylene
  • Keyword: Flames
  • Keyword: Combustion Products
  • STI Subject Categories: 37 Inorganic, Organic, Physical And Analytical Chemistry
  • Keyword: Methane
  • Keyword: Allene
  • Keyword: Combustion Kinetics
  • STI Subject Categories: 03 Natural Gas
  • Keyword: Concentration Ratio
  • Keyword: Ethylene

Source

  • Conference: Western Section of the Combustion Institute, Golden, CO (US), 03/14/2000

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: SAND2000-8606C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 755945
  • Archival Resource Key: ark:/67531/metadc711660

Note

  • Display Note: OSTI as DE00755945
  • Display Note: Medium: P; Size: 34 pages
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