비회색 가스 복사를 고려한 층류대향류 부분예혼합 화염에서의CO2 및 H2O 첨가에 따른 영향 연구
Effects of CO2 and H2O Additions on Partially Premixed Counterflow Flame by Considering Nongray Gas Radiation
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Abstract
Detailed flame structures of the counterflow flames of CH4/Air formed with CO2 and H2O addition are studied numerically. The detailed chemical reactions are modeled by using the OPPDIF and CHEMKIN-II code. Only the CO2 and H2O are assumed to participate in radiative heat transfer while all other gases are assumed to be transparent. The discrete ordinates method(DOM) and the narrow band based WSGGM with a gray gas regrouping technique(WSGGM-RG) are applied for modeling the radiative transfer through non-homogeneous and non-isothermal combustion gas mixtures generated by the counter flow flames. The results compared with the SNB model show that the WSGGM-RG is successful in modeling the counterflow flames with non-gray gas mixture. The numerical results show that the addition of CO2 and H2O to the oxidant nozzle lowers the peak temperature and the NO concentration in flame.
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