A study of ion currents in an oxyfuel flame due to work surface chemical action

Research output: Contribution to journalArticle

Abstract

Experiments controlling for work surface temperature and chemical activity under an oxyfuel cutting torch flame reveal that ion currents in the flame can double or even triple due to chemical action at the work surface. Steady-state experiments over copper coupons with various diameters at various temperatures are compared against transient experiments over steel plates with various surface conditions. In extreme cases, steel samples are coated with salts, and the effect is exaggerated by an order of magnitude. These measurements demonstrate that there are two sources of ions in the system; the chemical reaction in inner cone and the work surface. A number of plasma properties are estimated from measurements show good agreement with prior measurements in simpler geometries. These form the basis for an argument in favor of a simplified flame model proposed in the conclusions.

Original languageEnglish (US)
Pages (from-to)239-250
Number of pages12
JournalExperimental Thermal and Fluid Science
Volume98
DOIs
StatePublished - Nov 1 2018

Fingerprint

Ions
Steel
Experiments
Cones
Copper
Chemical reactions
Salts
Plasmas
Temperature
Geometry

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "Experiments controlling for work surface temperature and chemical activity under an oxyfuel cutting torch flame reveal that ion currents in the flame can double or even triple due to chemical action at the work surface. Steady-state experiments over copper coupons with various diameters at various temperatures are compared against transient experiments over steel plates with various surface conditions. In extreme cases, steel samples are coated with salts, and the effect is exaggerated by an order of magnitude. These measurements demonstrate that there are two sources of ions in the system; the chemical reaction in inner cone and the work surface. A number of plasma properties are estimated from measurements show good agreement with prior measurements in simpler geometries. These form the basis for an argument in favor of a simplified flame model proposed in the conclusions.",
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A study of ion currents in an oxyfuel flame due to work surface chemical action. / Martin, Christopher Reed.

In: Experimental Thermal and Fluid Science, Vol. 98, 01.11.2018, p. 239-250.

Research output: Contribution to journalArticle

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