摘要
为了研究爆炸冲击波前气流的扬尘特征及其关键影响因素,基于欧拉-欧拉方法,对不同冲击波前流速、沉积粉尘密度和粉尘粒径对扬尘效果的影响进行了模拟研究.结果表明:沉积粉尘在较低的冲击波前流速(100～300m/s)条件下,具有较理想的扬尘效果;粉尘密度在1 000～3 000kg/m3范围内,沉积粉尘的密度对其扬起特征影响较小;粉尘粒径对冲击波的扬尘特征影响明显,在粉尘颗粒较大时(大于0.1mm),由于颗粒受重力作用明显,扬尘效果不佳;在粒径较小时,粉尘可以在巷道空间内得到较好的分散,形成的粉尘团簇的各粉尘层分布均匀.
The E-E method was used to study the lifting of dust behind a shock wave. The in- fluence of gas velocity, dust density, and particle diameter on the lifting of dust was studied. The results show efficient lifting of dust when a low gas velocity （100 to 300 m/s） existed be- fore the shock wave. Dust density, 1 000 or 3 000 kg/ma , had little effect on lifting of the dust. Particle size had a significant effect on dust lifting. Dust particles with a diameter above 0. i mm suppress lifting of dust. Finer dusts are lifted efficiently and the resulting dust cloud is more uniform. These results can guide methods for preventing secondary dust explosions after initial gas explosions.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2012年第5期733-738,共6页
Journal of China University of Mining & Technology
基金
中央高校基本科研业务费专项资金项目(2012QNB01)
中国矿业大学人才引进项目(2011RC07)
中国矿业大学青年教师启航计划项目
关键词
瓦斯
爆炸
扬尘
流速
gas
explosion
dust lifting
gas velocity
