메탄/공기 대향류 화염에서 산소부화 및 수소 첨가가 CF4 분해에 미치는 영향
Effects of Oxygen Enrichment and Hydrogen Addition on CF4 Decomposition in Methane/Air Counterflow Flames
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A numerical analysis is performed to investigate the decomposition rate of CF4 added to the oxidizer side in non-premixed counterflow flames of methane with an initial pressure and temperature of 1 atm and 295 K, respectively, under oxygen-enhanced conditions on the oxidizer side or hydrogen added to the fuel side. Furthermore, the changes in axial velocity, maximum flame temperature, and NO concentration are analyzed in flames with a strain rate of 100 s-1. An increase in either the oxygen enrichment rate or the hydrogen addition allows a greater amount of CF4 to be added to the oxidizer without flame quenching, while simultaneously enhancing the CF4 decomposition rate. As the extinguishing condition is approached, the maximum concentration of nitrogen oxide decreases rapidly unlike the maximum flame temperature which decreases linearly.
Abstract
A numerical analysis is performed to investigate the decomposition rate of CF4 added to the oxidizer side in non-premixed counterflow flames of methane with an initial pressure and temperature of 1 atm and 295 K, respectively, under oxygen-enhanced conditions on the oxidizer side or hydrogen added to the fuel side. Furthermore, the changes in axial velocity, maximum flame temperature, and NO concentration are analyzed in flames with a strain rate of 100 s-1. An increase in either the oxygen enrichment rate or the hydrogen addition allows a greater amount of CF4 to be added to the oxidizer without flame quenching, while simultaneously enhancing the CF4 decomposition rate. As the extinguishing condition is approached, the maximum concentration of nitrogen oxide decreases rapidly unlike the maximum flame temperature which decreases linearly.