强冲击作用下含能粉体DAAF的热点光辐射特征  

Hotspot Optical Radiation Characteristics of Energetic Powder DAAF under Intense Impacts

作　　者：聂群朋 张岱宇[1,2] NIE Qunpeng;ZHANG Daiyu(School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Provincial Key Laboratory for Safety in Non Coal Mines,Mianyang 621000,Sichuan,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]四川省非煤矿山安全重点实验室,四川绵阳621000

出　　处：《西南科技大学学报》2024年第3期30-35,56,共7页Journal of Southwest University of Science and Technology

摘　　要：为探究强冲击作用下含能粉体中热点密度的生成与发展,采用二级轻气炮系统对含能粉体二氨基偶氮呋咱(Diaminofurazan,DAAF)进行冲击,通过辐射高温计观测同一冲击条件下不同厚度的DAAF粉体中热点辐射特征,采用普朗克公式拟合灰体模型得到DAAF粉体在速度为1.6 km/s飞片冲击下的表观温度与发射率。结果表明:冲击DAAF粉体的热点生成温度约为3950 K,并在200 ns的时间尺度内呈现一定的冷却态势,且随着样品的厚度增加热点发展更为充分,在最厚的样品中热点聚集更加明显;在200 ns时间尺度内,样品的发射率呈现增加态势且随着样品的厚度增加呈递增趋势。在冲击速度1.6 km/s下,0.645 mm厚度DAAF样品存在爆燃现象。In order to understand the generation and development of hot spots in energetic powders under strong impact,a two-stage light gas gun system was employed to impact diaminofurazan(DAAF)powder.The radiative high-temperature pyrometer was used to observe the thermal radiation characteristics of DAAF powder with different thicknesses under the same impact conditions.Using the Planck formula to fit the gray body model,the apparent temperature and emissivity of DAAF powder were obtained under a flyer plate impact velocity of 1.6 km/s.The results indicate that the hot spot generation temperature for impacting DAAF powder is approximately 3950 K,and it exhibits a certain cooling trend within a time scale of 200 ns.Moreover,with increasing thickness of the sample,the development of hot spots becomes more sufficient,and hot spot aggregation is more evident in the thickest sample.Within a 200 ns time scale,the emissivity of the samples shows an increasing trend,and it tends to increase with the thickness of the sample.At an impact velocity of 1.6 km/s,a DAAF sample with thickness of 0.645 mm exhibits a phenomenon of deflagration.

关 键 词：含能粉体 DAAF热点 光辐射 灰体模型 

分 类 号：TB383[一般工业技术—材料科学与工程]