热刺激约束DNAN基不敏感熔铸炸药装药点火后反应演化调控模型  

Regulation Model for Reaction Evolution of Confined DNAN-based Cast Explosives after Ignition Under Thermal Stimulation

作　　者：白志玲 段卓平[1] 李治 许礼吉 张连生[1] 黄风雷[1] BAI Zhi-ling;DUAN Zhuo-ping;LI Zhi;XU Li-ji;ZHANG Lian-sheng;HUANG Feng-lei(The State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《含能材料》2023年第10期1004-1012,共9页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(12002044)。

摘　　要：针对热刺激下熔铸炸药点火时基体炸药已处于熔融液化状态,反应产生的高温气体以气泡云形式在液态炸药中扩展和反应的物理特性,考虑燃烧气泡云尺度分布和激活发展机制,建立了熔铸炸药点火后燃烧气泡云反应演化调控模型,可较好地反映炸药本征燃烧速率、壳体约束强度、装药结构尺寸、预留空气隙体积、泄压孔面积等对装药反应演化过程和终态反应度的影响规律,并通过与实验结果对比验证了模型的适应性。结果表明:随着壳体约束强度和装药尺寸增加,装药自增强燃烧速度增长越快,装药反应烈度增大;通过泄压孔结构冲开阈值和泄压孔面积的匹配设计,实现装药反应烈度控制,在本研究装药条件下,泄压孔面积占壳体总面积达8.6‰时可控制装药反应烈度为燃烧,为装药热安全性设计和烈度评估提供理论依据。The matrix explosives in cast explosives are molten when being ignited under thermal stimulation,thus the hot gas released by reaction expands and reacts in liquid explosives in the physical form of bubble clouds.Considering the scale distribution and activated developing mechanism of burning-bubble clouds,a regulation model for the evolution of burning-bubble clouds after ignition of cast explosives is established.This model well reflected the dependence of reaction evolution and final reaction violence on intrinsic burning rate,shell confinement strength,charging structure size,reserved air-gap volume and pressure relief venting area.Furthermore,the flexibility of this model was verified by comparing the calculated results with the experimental data.Results show that with the increase of shell confinement strength and charge size,the self-sustaining enhanced combustion and reaction violence level increase.Moreover,with the combined design of pressure relief structure venting threshold and pressure relief venting area,the reaction violence of the charge is controlled.Under the charging condition in this paper,when the ratio of pressure relief venting area to shell surface area is up to 8.6‰,the charge reaction violence level is controlled as burning.This work provides a theoretical basis for the thermal safety design and reaction violence evaluation of explosives.

关 键 词：熔铸炸药 非冲击点火 自持增强燃烧 燃烧气泡云反应演化模型 泄压结构 反应烈度 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O354[理学—流体力学]