The effect of water vapor addition on the ignition delay of iso-octane/air mixture was numerically investigated with detailed chemical reaction mechanism. The Chemkin-III was utilized to evaluate the delay time of autoignition for isobaric conditions. By dilution effect and thermal effect, water vapor addition increases the ignition delay time. However, the chemical effect by adding water vapor makes the ignition delay shortened. The ignition delay by the chemical effect is reduced by two ways. Dissociation of water vapor increases the quantities of OH and H. One way is that OH directly makes the rate of iso-octane oxidation reaction 2 increase. The other is that HO2 is produced more by three-body reaction, H+O2+M →HO 2+M, which makes the rate of iso-octane oxidation reaction 3 increase. All trends of three effects are similar according to water vapor addition.
목차
ABSTRACT 1. 서론 2. 지배방정식 및 계산방법 3. 해석 및 결과 4. 결론 후기 References
키워드
Chemical Effect(화학적 효과)Detailed Chemical Reaction Mechanism(상세화학반응메커니즘)Dilution Effect(희석효과)Ignition Delay Time(점화지연시간)Iso-Octane/Air Mixture(아이소 옥탄/공기 혼합기)Thermal Effect(열적효과)Water Vapor Addition(수증기첨가)
저자
백동훈 [ D. H. Baik | Graduate Student, Dept. of Mechanical & Automotive Engineering, Seoul National University of Science and Technology ]
이수룡 [ S. R. Lee | Member, Professor, Dept. of Mechanical & Automotive Engineering, Seoul National University of Science and Technology ]
Corresponding author