WSGGM 재조합을 이용한 층류대향류 부분예혼합 화염에서의 CO2 첨가 및 예열에 따른 화염구조 해석연구

초록

Detailed flame structures of the counterflow flames formed for different inlet temperature and addition are studied numerically. The detailed chemical reactions are modeled by using the CHEMKIN-II code. Only the CO2 and H2O are assumed to participate by absorbing the radiative energy while all other gases are assumed to be transparent. The discrete ordinates method 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 opposed flow flames. The results compared with 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 to the oxidant lowers the peak temperature and NO concentration in flame. But preheating of fuel and oxidant comes to increase the peak temperature and NO concentration.