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넓은 당량비 구간에서 수소함유량에 따른 합성가스(H₂/CO)/공기 예혼합화염의 연소속도 및 화염구조에 관한 연구
정병규(Byeong-Gyu Jeong),이기만(Kee-Man Lee) 한국연소학회 2014 한국연소학회지 Vol.19 No.1
In this study, the laminar burning velocity of syngas fuel(H₂/CO) and flame structure with various hydrogen contents were studied using both experimental measurements and detailed kinetic analysis. The laminar burning velocities were measured by the angle method of Bunsen flame configuration and the numerical calculations including chemical kinetic analysis were made using CHEMKIN Package with USC-Mech II. A wide range of syngas mixture compositions such as H₂: CO = 10 : 90, 25 : 75, 50 : 50, 75 : 25 and equivalence ratios from lean condition of 0.5 to rich condition of 5.0 have been considered. The experimental results of burning velocity were in good agreement with previous other research data and numerical simulation. Also, it was shown that the experimental measurements of laminar burning velocity linearly increased with the increment of H₂ content although the burning velocity of hydrogen is faster than the carbon monoxide above 10 times. This phenomenon is attributed to the rapid production of hydrogen related radicals such as H radical at the early stage of combustion, which is confirmed the linear increase of radical concentrations on kinetic analysis. Particular concerns in this study are the characteristics of burning velocity and flame structure different from lean condition for rich condition. The decrease of OH radicals and double peaks are observed with H2 content in rich condition once H₂ fraction exceeds over threshold.
넓은 당량비 구간에서 수소 함유량에 따른 합성가스(H₂/CO)-공기 예혼합 화염의 층류연소속도에 관한 연구
정병규(Byeong-Gyu Jeong),황철홍(Cheol-Hong Hwang),이기만(Kee-Man. Lee) 한국연소학회 2012 KOSCOSYMPOSIUM논문집 Vol.- No.45
In this study, syngas laminar burning velocities with various hydrogen contents were studied using both experimental measurements and kinetic simulations. The laminar burning velocities were measured by the angle method of Bunsen flame configuration and the numerical calculations including burning velocities were made using CHEMKIN Package with USC-Mech II. A large range of syngas mixture compositions such as 10:90%, 25:75%, 50:50%, 75:25% and equivalence ratio from lean condition of 0.5 to rich condition of 5.0 have been conducted. The experimental results of burning velocity were in good agreement with previous other research data and numerical simulation. Also, it was shown that the experimental measurements of laminar burning velocity linearly increased with the increasing of H2 content although the flame speed of hydrogen is faster about ten times than carbon monoxide. This phenomenon is attributed to the rapid production of the hydrogen related radicals such as H and OH at the early stage of combustion, which is confirmed the linear increasing of radical concentrations on kinetic simulation.
안정화된 버너화염에 의한 석탄가스화 합성가스(H₂/CO)-공기 예혼합화염 층류 연소속도에 관한 연구
정병규(Byeong Gyu Jeong),이기만(Kee Man Lee) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Syngas laminar burning velocity measurements were carried out at atmospheric pressure and ambient temperature using the Bunsen flame configuration with nozzle burner as a fundamental study on flame stability of syngas. Representative syngas mixture compositions (H₂:CO) such as 25:75%, 50:50% and 75:25% and equivalence ratios from 0.5 to 1.4 have been conducted. Average laminar burning velocities have been determined by the stabilized burner flames using the angle method, radical surface area method and compared with the data obtained from the other literatures. It confirmed that there was the part which the results of numerical data in the various composition ratios and equivalence ratios coincide with the result of this experiment. Also, it was reconfirmed that the laminar burning velocities gradually increased with the increasing of H₂ content in a fuel mixture.