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CH₄ 연료의 중간 생성물이 확산화염의 NO 생성에 미치는 영향
오창보(C.B.Oh),이창언(C.E.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
Numerical analysis was performed with detailed reaction mechanism to investigate the role of thermal and prompt NO mechanism in CH₄-Air jet diffusion flame. The results show that the peak of Full NO concentration is higher than that of Thermal NO, but Prompt NO concentration is very low compared with Thermal NO. Especially, in the fuel region of jet upstream, Full NO concentration is lower than that of Thermal NO. because Full Mechanism contributes to negative formation by attack of intermediate products of CH₄ fuel. It is believed that this NO reduction mechanism can be used for effective NO reduction technique.<br/>
고민욱 ( M W Ko ),오창보 ( C B Oh ),한용식 ( Ys Han ),최병일 ( B I Choi ),도규형 ( K H Do ),김명배 ( M B Kim ),김태훈 ( T H Kim ) 한국안전학회(구 한국산업안전학회) 2015 한국안전학회지 Vol.30 No.1
A Large Eddy Simulation(LES) was performed for the prediction of unsteady dispersion behavior of hydrogen fluoride (HF). The HF leakage accident occurred at the Gumi fourth industrial complex was numerically investigated using the Fire Dynamics Simulator (FDS) based on the LES. The accident area was modeled three-dimensionally and time-varying boundary conditions for wind were adopted in the simulation for considering the realistic accident conditions. The Message Passing Interface (MPI) parallel computation technique was used to reduce the computational time. As a result, it was found that the present LES simulation could predict the unsteady dispersion features of HF near the accident area effectively. The dispersion behaviors of the leaked HF was much affected by the unsteady wind direction. The LES could predict the time variation of the HF concentration reasonably and give an useful information for the risk analysis while the prediction with the time-averaging concept of HF concentration had a limitation for the amount of HF concentration at specific location point. It was identified that the LES is very useful to predict the dispersion characteristics of hazardous chemicals