点火具爆炸压力的理论计算与试验研究  

Computational and Experimental Studies of Explosion Pressure of Igniter

作　　者：曹卫国[1] 黄丽媛[1] 梁济元[1] 郑俊杰[1,2] 刘向阳 苗楠[4] 秋珊珊[1,2] 潘峰[1,2] 

机构地区：[1]南京理工大学化工学院,江苏南京210094 [2]国家民用爆破器材质量监督检验中心,江苏南京210094 [3]盐城进出口检验检疫局,江苏盐城224002 [4]东北大学工业爆炸及防护研究所,辽宁沈阳110004

出　　处：《爆破器材》2013年第4期24-27,共4页Explosive Materials

基　　金：国家自然科学基金项目(51174047);国家自然科学基金青年基金项目(11102091);江苏省2013年度普通高校研究生科研创新计划项目(CXZZ13_0216);高等学校博士学科点专项科研基金博导类(20113219110010)

摘　　要：为了研究不同质量的点火具自身爆炸特性以及对粉尘爆炸下限浓度的影响,采用20 L球爆炸测试装置对不同质量的点火具进行了试验,与理论计算结果进行了对比;并对过200目筛、中位径为32μm的煤粉进行了爆炸下限浓度研究。结果表明:试验结果和理论计算结果基本一致,爆炸压力随点火具质量的增加而呈现线性上升;随着点火具质量的增加,煤粉的爆炸压力逐渐增加,爆炸下限浓度逐渐降低,当点火具质量由0.24 g增加至2.40 g时,煤粉的爆炸下限浓度由40～50 g/m3下降到30～40 g/m3,引爆煤粉的危险性进一步增大。In order to study intrinsic explosibihy of igniters in different quantity and the influence on minimum explosive concentration of coal dust, 20 L sphere explosion test units were employed, and then the experiment results were com- pared with the theoretical calculations. Moreover, coal powders of less than 200 mesh, whose median diameters were 32 μm, were used as dust samples for minimum explosive concentration evaluation. The experimental results show agreement with the theoretical calculations. The explosion pressure has a linear increase with the increasing of ignition quality. With the ignition quaIity increasing, the explosion pressure of coal dust increases and the minimum explosive concentration de- creases conversely. When the ignition quantity increased from 0.24g to 2.40g, the minimum explosive concentration re- duces from 40-50 g/m3 to 3040 g/m3, which indicated that the risk of such dust was further increased.

关 键 词：点火具质量 20 L球 煤粉爆炸 爆炸压力 爆炸下限浓度 

分 类 号：O389[理学—流体力学] X932[理学—力学]