激波后沉积粉尘的燃烧特征  

Characteristics of Shock-induced Combustion of Dust Deposit

作　　者：陆守香[1] 范宝春[1] 

机构地区：[1]淮南矿业学院化学工程系,南京理工大学动力工程学院

出　　处：《南京理工大学学报》1996年第1期17-20,共4页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金;中国工程物理研究院科学技术基金

摘　　要：激波掠过可燃沉积粉尘后将使粉尘颗粒上扬、点火与燃烧。该文给出了描述该现象的理论模型，并对此进行了数值模拟。结果表明，激波马赫数越大，气相中氧气含量越高，颗粒初始直径越小，则颗粒的点火延迟时间越小，颗粒温度及化学反应速率上升越快，颗粒的燃烧时间愈短。Based on the present model,the processes of ignition and combustion of dust particles in a shock induced boundary layer are simulated in this paper.It is shown that the shock ignition delay time decreases with the increase of shock Mach number and oxygen fraction in gas phase and with the decrease of initial diameter of the particles.It is also revealed that the shorter the shock ignition delay is,the faster the temperature and the reacting rate of the particle rise and the shorter the whole duration of particle reaction is.

关 键 词：多相流动 边界层燃烧 粉尘 爆炸 激波 燃烧 

分 类 号：O643.2[理学—物理化学] X932[理学—化学]