부분 예혼합 화염에서 연소실 압력이 연료별(CH₄, C₂H₄, C₃H_8) 연소특성과 반응영역에 미치는 영향
Influence of Changing Combustor Pressure on Combustion Characteristics and Reaction zone in the Partially Premixed Flame with CH₄, C₂H₄and C₃H_8
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초록
Combustion experiments were conducted at three different fuels (CH₄, C₂H₄and C₃H_8) to investigate the effects of combustor pressure (30kPa~-30kPa) on combustion charateristics and reaction zone structure. Regardless of the fuels, emission index of CO (EICO) increased with decreasing combustor pressure, and EICO of C₂H₄was mostly affected by changing combustor pressure at subatmospheric pressure. In order to observe reaction zone, OH*,CH* and C₂* chemiluminescence intensity were measured. The sequence of the chemiluminescence intensity peak position was affected by chemical characteristics of fuels rather than changing combustor pressure. The emission zone thickness of C₂H₄and C₃H_8, defined by the full width at half maximum (FWHM) of CH* intensity profile, were increased with decreasing combustor pressure. however, the thickness of C₂H₄exhibited the opposite tendency due to the characteristics of the fuel as the bond structure.
Abstract
Combustion experiments were conducted at three different fuels (CH₄, C₂H₄and C₃H_8) to investigate the effects of combustor pressure (30kPa~-30kPa) on combustion charateristics and reaction zone structure. Regardless of the fuels, emission index of CO (EICO) increased with decreasing combustor pressure, and EICO of C₂H₄was mostly affected by changing combustor pressure at subatmospheric pressure. In order to observe reaction zone, OH*,CH* and C₂* chemiluminescence intensity were measured. The sequence of the chemiluminescence intensity peak position was affected by chemical characteristics of fuels rather than changing combustor pressure. The emission zone thickness of C₂H₄and C₃H_8, defined by the full width at half maximum (FWHM) of CH* intensity profile, were increased with decreasing combustor pressure. however, the thickness of C₂H₄exhibited the opposite tendency due to the characteristics of the fuel as the bond structure.
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