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

Martin, Christopher R.

doi:10.1016/j.expthermflusci.2018.06.003

Cited by 8 publications

(11 citation statements)

References 24 publications

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“…A comprehensive two-dimensional computational simulation only with the reduced combustion chemical mechanism with ion-exchange reactions has already been completed [15] to elucidate the experimental results and to investigate the electrical characteristics such as ion migrations and ion distributions. Nonetheless, the findings exhibit some magnitude of differences compared to the experimental results [6,11]. In [6], study of ion currents in the oxyfuel cutting system revealed that there are two sources of ions; primary ions that are generated in the flame itself and secondary ions that are generated at the work piece.…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 85%

“…Nonetheless, the findings exhibit some magnitude of differences compared to the experimental results [6,11]. In [6], study of ion currents in the oxyfuel cutting system revealed that there are two sources of ions; primary ions that are generated in the flame itself and secondary ions that are generated at the work piece. The work unveiled that, "copper work pieces have stable and repeatable i-v characteristics regardless of the metal temperature.…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 85%

“…Journal of Fluids Engineering distinct regimes [6]. Moreover, the i-v curves have been further investigated to elucidate the production rate of charged species [7,8], and the effect of electric fields on flames [9][10][11][12].…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

“…A simplified two-dimensional geometry as shown Fig. 2 was considered to replicate the experimental set-up [6]. As can be seen from the figure, we take advantage of the axial-symmetry of the system and therefore, considered only half of the physical setup and part of the work surface.…”

Section: Geometrymentioning

confidence: 99%

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Role of Secondary Ions on the i-v Characteristics of Oxyfuel Flame Subject to an Electric Field

Untăroiu

Rahman

Martin

2023

Journal of Fluids Engineering

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Recent use of ion currents as a sensing strategy in the mechanized oxyfuel cutting process motivated a series of studies which revealed that the steel work piece contributes secondary ions in addition to the primary ions classically identified in the oxyfuel flame. In this work, we present a computational model that has linked carbon related chemi-ions as a source of secondary ions in preheating stage of oxyfuel cutting process subject to electric bias voltages. The flames' response to the electric field at different positive and negative polarity manifested a better understanding of the physical behavior of current- voltage (i-v) relationship. While copper surface exhibits stable and repeatable i-v characteristics, sporadically enhanced current was observed in positive saturation regime for steel surface, and this is believed be due to the presence of secondary chemi-ions. To this extent, a source term of gaseous carbon has been assigned to mimic the 'work surface' reactions. The hypothesis is that since carbon is an important element, it will be diffusing out of the steel surface and evaporating into the flame.

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Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 85%

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 85%

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

Section: Geometrymentioning

confidence: 99%

See 2 more Smart Citations

Role of Secondary Ions on the i-v Characteristics of Oxyfuel Flame Subject to an Electric Field

Untăroiu

Rahman

Martin

2023

Journal of Fluids Engineering

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“…Therefore, the flame in the electric field will show electrical characteristics. The voltage‐current characteristics ( I ‐ V curve), 13 flame resistance, 14 and ion currents in the flame 15,16 in electric fields were measured by researchers. With an electric field, the current through the circuit will increase with the voltage, which is described as “ I ‐ V curve.” The analyzing of the I ‐ V curve can help to access the valuable information about the ions distribution 17 .…”

Section: Introductionmentioning

confidence: 99%

Study on the electrical response of small ethanol‐air diffusion flame under the uniform electric field

2020

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Ethanol is a renewable alternative fuel in many application areas. The external electric field is applied to assist the small ethanol diffusion flame in this study. The electrical response of flame under the uniform electric field is discussed. A reduced chemical mechanism of ethanol is used to establish a numerical model corresponding to the experimental system. The characteristics of current-electric field strength, equivalent resistance, distribution of charged species, velocity field, and reaction rate are studied. The results show that the electric field brings significant effects on the combustion and electrical characteristics of flame. As the electric field strength increases, the current through the circuit and the equivalent resistance of the flame show a three-stage variation. The current increases first (0-40 kV/m), then stabilizes (40-70 kV/m) and then continues to increase (70-100 kV/m) with the increase of the electric field

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Electrical characteristics of the oxyfuel flame while cutting steel

Pond

Martin

2020

Experimental Thermal and Fluid Science

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

Cited by 8 publications

References 24 publications

Role of Secondary Ions on the i-v Characteristics of Oxyfuel Flame Subject to an Electric Field

Role of Secondary Ions on the i-v Characteristics of Oxyfuel Flame Subject to an Electric Field

Study on the electrical response of small ethanol‐air diffusion flame under the uniform electric field

Electrical characteristics of the oxyfuel flame while cutting steel

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