CAJ | 학술논문

利用自行设计的氙灯点火燃烧试验装置,采用高分辨率高速成像系统,开展了单个镁颗粒在CO2 气体氛围中的点火燃烧试验研究,直接观察到了镁颗粒点火燃烧过程中颗粒和火焰形态. 试验结果表明,镁颗粒在CO2 中的点火燃烧经历了颗粒熔化、表面化学反应、氧化层破裂、镁蒸气喷射、气相燃烧等物理化学过程,颗粒燃烧过程伴有脉动燃烧现象;环境压强对颗粒表面氧化层疏松度有一定影响,进而会影响到颗粒的点火温度,压强越大,颗粒点火温度越高;燃烧产物是中空的多孔球壳状物质,且外层为白色氧化镁,内层为黑色碳.
이용자행설계적선등점화연소시험장치,채용고분변솔고속성상계통,개전료단개미과립재CO2 기체분위중적점화연소시험연구,직접관찰도료미과립점화연소과정중과립화화염형태. 시험결과표명,미과립재CO2 중적점화연소경력료과립용화、표면화학반응、양화층파렬、미증기분사、기상연소등물이화학과정,과립연소과정반유맥동연소현상;배경압강대과립표면양화층소송도유일정영향,진이회영향도과립적점화온도,압강월대,과립점화온도월고;연소산물시중공적다공구각상물질,차외층위백색양화미,내층위흑색탄.
A Xe-lamp ignition and combustion setup was designed,and a series of experiments of single magnesium particle ig-nition and combustion in CO2 were conducted,with the help of a high resolution and high speed image formation system.During the ignition and combustion,the structure of particle and flame was observed directly and clearly.The results indicate that the process of ignition and combustion of a single magnesium particle consists of metal melting,surface chemical reaction,oxide film fracture,mag-nesium gas ejecting and gas phase combustion.And combustion fluctuation was also observed during the combustion process.Environ-mental pressure would affect the particle ignition temperature,which increases the rising environmental pressure.The combustion pro-duction takes the shape of a hollow sphere,being covered by white magnesium oxide on the surface,and black carbon filled in the inner layer.