Experimental and numerical studies of ion and electron concentrations in laminar methane-oxygen counterflow diffusion flames

Parth V. Shah, Alexei V. Saveliev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Charged species formed in a laminar counterflow diffusion flame of methane and oxygen enriched air are studied numerically and experimentally. Mole fractions and concentrations of major individual charged species are predicted using a one-dimensional counterflow diffusion flame model. A 65 step chemi-ionization mechanism in addition to a 208 methane-air combustion mechanism is used to model the chemical kinetics of the flame. The numerical calculations predict electrons and H3O+ to be the most dominant negative and positive charged particles respectively. OH- is found to be the most dominant species amongst the negative ions. As a result the total positive ion concentration is approximately equal to H3O+ concentration. An experimental method of measuring electron and total positive ion concentration is used. Electric current is measured as a function of the voltage and volt-ampere characteristics are obtained at different points between the two nozzles of the counterflow burner. The Langmuir probe theory is used to calculate the spatial ion and electron concentrations from the voltage-ampere curves. The effect of thermoionization of the neutral species is also analyzed. The experimental results obtained represent a similar behavior as compared to the numerical results.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
PublisherCombustion Institute
Pages106-111
Number of pages6
ISBN (Electronic)9781629937199
StatePublished - Jan 1 2013
EventFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 - Clemson, United States
Duration: Oct 13 2013Oct 16 2013

Publication series

NameFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013

Other

OtherFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
CountryUnited States
CityClemson
Period10/13/1310/16/13

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  • Cite this

    Shah, P. V., & Saveliev, A. V. (2013). Experimental and numerical studies of ion and electron concentrations in laminar methane-oxygen counterflow diffusion flames. In Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 (pp. 106-111). (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013). Combustion Institute.