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北京理工大学 爆炸科学与安全防护全国重点实验室, 北京 100081
Received:10 July 2024,
Published Online:28 June 2025,
Published:10 June 2025
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Zhi LI, Zhuoping DUAN, Zhiling BAI, et al. Burning Rate Characteristics of Typical DNAN-based Melt-cast Explosives[J]. Acta Armamentarii, 2025, 46(6): 240565.
Zhi LI, Zhuoping DUAN, Zhiling BAI, et al. Burning Rate Characteristics of Typical DNAN-based Melt-cast Explosives[J]. Acta Armamentarii, 2025, 46(6): 240565. DOI: 10.12382/bgxb.2024.0565.
约束装药点火后反应演化模型是安全弹药缓释结构设计的理论依据
而炸药燃速-压力关系是反应演化模型的重要组成部分。为了给2
4-二硝基苯甲醚(2
4-Dinitroanisole
DNAN)基熔铸炸药的安全弹药反应烈度控制设计提供基础
基于激光点火技术和快响应热电偶火焰阵面探测技术
建立密闭空腔线性燃烧燃速-压力特性实验测量系统
得到典型DNAN基熔铸炸药RB-2(DNAN/奥克托今/Al/黏结剂)的燃速-压力特性
研究温度对炸药燃速-压力关系的影响。研究结果表明:随着温度的升高
RB-2炸药燃速增大
压力指数增加
同时压力越高、温度对燃速的影响越显著;RB-2炸药在60MPa压力下会发生固体结构失效
导致燃速剧增
使炸药由线性传导燃烧机制向对流燃烧机制转变;与熔铸B炸药相比
RB-2炸药的燃速和压力指数较低
结构失效压力较高
意外点火后的反应增长慢
更容易通过反应缓释结构调控反应烈度。
The reaction evolution model of constrained charge after ignition is the theoretical basis for the design of safe munition release mechanism
and the explosive burning rate-pressure relationship is an important part of the reaction evolution model. To provide a foundation for the design of safety munition reaction violence control for 2
4-dinitroanisole (DNAN)-based melt-cast explosives
an experimental measurement system for closed bomb burning rate-pressure characteristics is established based on the laser ignition technology and the fast-response thermocouple flame front detection technology. The burning rate-pressure relationship of a typical DNAN-based melt-cast explosive RB-2(DNAN/HMX/Al/binder) was obtained through experiment
and the effect of temperature on the burning rate-pressure characteristics of the explosive was investigated. The results show that the burning rate of RB-2 explosives increases and the pressure index increases with the increase in temperature. At the same time
the higher the pressure is
the more significant the effect of temperature on the burning rate is. When RB-2 explosive is subjected to a pressure of 60MPa
its solid structure will fail to result in a rapid increase in the burning rate and shift the combustion mechanism of explosive from the linear conduction combustion to the convective combustion. Compared to melt-cast B explosives
RB-2 explosives exhibit lower burning rates and pressure index
along with higher structural failure pressures of the explosives. The reaction growth after accidental ignition is slower
and the reaction violence is regulated more easily through the reaction release structure.
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段卓平 , 白志玲 , 白孟璟 , 等 . 强约束固体炸药燃烧裂纹网络反应演化模型 [J ] . 兵工学报 , 2021 , 42 ( 11 ): 2291 - 2299 . DOI: 10.3969/j.issn.1000-1093.2021.11.001 http://doi.org/10.3969/j.issn.1000-1093.2021.11.001 为表征受约束装药非冲击点火后的反应演化行为,建立了燃烧裂纹网络反应演化理论模型。该模型量化了反应烈度,通过与实验结果对比验证了模型的适应性。结果表明:壳体约束越强,高温产物气体自增强燃烧越迅速,装药反应越剧烈,壳体破坏时装药反应度越大;装药结构尺寸越大,炸药反应初期高温产物气体流动和表面燃烧导致裂纹增压扩展过程的时间越长,但后期反应越剧烈,壳体破坏时装药反应度越大;点火阈值压力对装药最终的反应烈度影响不明显。炸药燃烧裂纹网络反应演化模型可较好地反映炸药本征燃烧速率、约束强度、装药结构尺寸等对反应演化的影响规律,为弹药在意外刺激下的安全性设计和烈度量化评估提供了理论基础。
DUAN Z P , BAI Z L , BAI M J , et al . Burning-crack networks model for combustion reaction growth of solid explosives with strong confinement [J ] . Acta Armamentarii , 2021 , 42 ( 11 ): 2291 - 2299 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2021.11.001 http://doi.org/10.3969/j.issn.1000-1093.2021.11.001 A theoretical model for burning-crack networks is developed to characterize the non-shock initiation reaction growth behavior of solid explosives with strong confinement and give a quantification of reaction violence.The model is verified by comparing the calculated results with the experimental data. It is found that the stronger the confinement is,the faster the self-sustaining enhanced combustion is,and the more violent the reaction is for confinement failure. Moreover,the larger the charge size is,the longer the process of crack pressurization caused by gas flow and surface combustion at the initial reaction stage is,but the more violent the reaction is at the later self-sustaining enhanced combustion,and the greater the reaction degree is for confinement failure.The ignition intensity has no significant effect on the final reaction intensity of explosive charge.The results show that the theoretical burning-crack networks model is suitable for describing the effects of the intrinsic combustion rate of explosives,the confinement strength,the charge structure size,the air-gap volume and the pressure relief vent on the reaction growth of explosive charge,thus providing a theoretical method for the explosive safety design and the evaluation of explosives reaction violence.
白志玲 , 段卓平 , 李治 , 等 . 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 [J ] . 含能材料 , 2023 , 31 ( 10 ): 1004 - 1012 .
BAI Z L , DUAN Z P , LI Z , et al . Regulation model for reaction evolution of confined DNAN-based cast explosives after ignition under thermal stimulation [J ] . Chinese Journal of Energetic Materials , 2023 , 31 ( 10 ): 1004 - 1012 . (in Chinese)
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沙本尚 . 基于光学测量的NEPE高能复合固体推进剂燃面铝团聚试验研究 [D ] . 长沙 : 国防科学技术大学 , 2021 .
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孙得川 , 贤光 . 超声波测量大尺寸固体火箭发动机燃速的关键技术 [J ] . 兵工学报 , 2023 , 44 ( 4 ): 1097 - 1106 .
SUN D C , XIAN G . Key technology for ultrasonic measurement of burning rate in large-scale solid rocket motors [J ] . Acta Armamentarii , 2023 , 44 ( 4 ): 1097 - 1106 . (in Chinese) DOI: 10.12382/bgxb.2021.0805 http://doi.org/10.12382/bgxb.2021.0805 Measuring the true burning rate of a solid rocket motor (SRM) is a challenging problem in SRM research and development. Ultrasonic measurement has been proven to be a feasible solution. This study provides an overview of the related technologies for measuring dynamic and large-scale motor burning rates using ultrasonic technology. Static tests of steel shell/propellant assembly and high-temperature verification tests of the steel shell solid motor are carried out using low-frequency ultrasonic technology. After review and experimental verification, it is determined that low-frequency ultrasonic is the most feasible approach for measuring the burning rate of large-scale SRM. A further research direction is to optimize the probe layout. The study also provides suggestions for ultrasonic data processing.
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胡松启 , 韩进朝 , 刘林林 . 丁羟推进剂高压燃速及其调控方法研究进展 [J ] . 火炸药学报 , 2022 , 45 ( 4 ): 452 - 465 . DOI: 10.14077/j.issn.1007-7812.202203002 http://doi.org/10.14077/j.issn.1007-7812.202203002 为了快速预测聚能装药射流速度,减少数值模拟的计算成本,构建了自适应克里金模型,通过少量的数值模拟结果,对参数在一定范围内的聚能装药射流速度进行了预测。在Matlab平台中,以药型罩锥角、罩壁厚、装填炸药参数作为输入值、射流速度作为输出值,构建了自适应克里金模型,通过学习函数反复加入训练样本,直至模型收敛,实现了对测试样本射流速度的预测。为了验证所建立克里金模型的准确度,将其预测结果与数值模拟结果进行了对比。结果表明,克里金模型对聚能射流速度的预测结果与数值模拟结果之间的误差小于2%,说明所构建的自适应克里金模型能够在保证计算精度的情况下,实现在不同炸药装药、不同药型罩参数的条件下,对聚能射流速度的快速预测,该方法能够兼顾预测精度和计算成本,并提高其计算效率。
HU S Q , HAN J C , LIU L L . Research progress on high-pressure burning rate and regulation methods of HTPB propellants research progress on high-pressure burning rate and regulation methods of HTPB propellants [J ] . Chinese Journal of Explosives & Propellants , 2022 , 45 ( 4 ): 452 - 465 . (in Chinese)
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尚海林 , 杨洁 , 胡秋实 , 等 . 炸药裂缝中的对流燃烧现象实验研究 [J ] . 兵工学报 , 2019 , 40 ( 1 ): 99 - 106 . DOI: 10.3969/j.issn.1000-1093.2019.01.012 http://doi.org/10.3969/j.issn.1000-1093.2019.01.012 为研究高能炸药裂缝中燃烧演化规律,加深对武器装药意外点火后发生高烈度反应复杂力学-热学-化学耦合过程的机理性认识,采用热点火方式结合高速摄影、压力测量等测试技术,对奥克托今基JO-9159粘结炸药预置裂缝中燃烧演化过程开展实验观测。结合气动壅塞理论分析了裂缝宽度对燃烧演化的影响。结果表明:在较强约束条件下,炸药内部亚毫米宽度的裂缝燃烧能够产生超过200 MPa的压力,火焰传播速度超过600 m/s;裂缝宽度越大,装置解体前燃烧产生的峰值压力越低,对流燃烧传播速度越快。
SHANG H L , YANG J , HU Q S , et al . Experimental research on convective burning in explosive cracks [J ] . Acta Armamentarii , 2019 , 40 ( 1 ): 99 - 106 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2019.01.012 http://doi.org/10.3969/j.issn.1000-1093.2019.01.012 To investigate the evolution law of burning in high explosive cracks and understand the mechanism of the complicated mechanical-heat-chemical coupling process for high intensity reaction of projectile fillings during accidental ignition, the evolutionary process of burning in preformed cracks inside HMX-based PBX under non-shock initiation was recorded by high-speed camera and pressure transducers. The influences of different crack widths on burning evolution are analyzed based on gas-dynamic choking theory. Experimental results reveal that, under relatively high constraint conditions, the convective burning in sub-millimeter cracks of explosive can produce high pressure exceeding 200 MPa, and the flame propagation speed exceeds 600 m/s. The comparison of different crack widths indicates that the pressure due to convective burning decreases with the increase in crack width, but the burning propagation speed increases. Key
朱道理 , 周霖 , 张向荣 , 等 . DNAN及TNT基熔铸炸药综合性能比较 [J ] . 含能材料 , 2019 , 27 ( 11 ): 923 - 930 .
ZHU D L , ZHOU L , ZHANG X R , et al . Comparison of comprehensive properties for DNAN and TNT-based melt-cast explosives [J ] . Chinese Journal of Energetic Materials , 2019 , 27 ( 11 ): 923 - 930 . (in Chinese)
杨年 , 马腾 , 黄寅生 , 等 . 损伤对DNAN基熔铸炸药点火后反应增长的影响 [J ] . 火炸药学报 , 2023 , 46 ( 11 ): 990 - 998 .
YANG N , MA T , HUANG Y S , et al . Effect of damage on reaction growth of DNAN based melt-cast explosive after ignition [J ] . Chinese Journal of Explosives & Propellants , 2023 , 46 ( 11 ): 990 - 998 . (in Chinese)
许礼吉 , 段卓平 , 白志玲 , 等 . RDX基PBX炸药热损伤演化行为的量化表征 [J ] . 兵工学报 , 2023 , 44 ( 7 ): 2002 - 2013 . DOI: 10.12382/bgxb.2022.0296 http://doi.org/10.12382/bgxb.2022.0296 炸药热损伤特征及演化行为对装药安全性具有重要影响。综合采用微米级计算机断层扫描和定量图像分析方法,系统研究热处理过程中某RDX基PBX炸药内部产生的损伤特征,包括损伤形貌特征、损伤量化表征和损伤形成机制。炸药样品被加热到不同温度,直至接近其临界点火温度,热损伤后炸药内部细观结构发生显著变化,产生RDX颗粒-粘结剂界面力学脱粘、RDX颗粒内部热分解形成微孔以及脱粘区域汇集形成连通孔隙等典型损伤特征。定量分析表征损伤的多个关键参量如孔隙率、孔隙尺寸分布、孔隙比表面积、球度和泛形复杂度等随温度的变化规律,揭示了RDX基PBX炸药热损伤形成机制和损伤演化规律。所得研究成果为研究热损伤对炸药点火响应的敏化机制、建立炸药损伤点火反应演化泛形模型提供了物理基础。
XU L J , DUAN Z P , BAI Z L , et al . Quantitative characterization of thermal damage evolution of RDX-based PBX explosives [J ] . Acta Armamentarii , 2023 , 44 ( 7 ): 2002 - 2013 . (in Chinese) DOI: 10.12382/bgxb.2022.0296 http://doi.org/10.12382/bgxb.2022.0296 The thermal damaged features and evolutionbehaviors of high explosives (HEs) play a crucial roleintheir safety. In this study, micro-scale computerized tomography (Micro-CT)technology and quantitative image analysis were used to systematicallyinvestigatethe mesostructural defects in RDX-based PBXs after thermal damage, including defect geometrical features,quantitative statistics, and formation mechanism. The samples were heated untilreaching the critical ignition temperature. Significant changes in mesostructural morphology of the thermal damaged samples were observed,resulting in typical damage characteristics such asmechanical debonding of RDX particle-binder interfaces,meso-pores formed by thermal decomposition of RDX particles,and channels through interconnection of interfacial debonding. The variation of several key parameters with temperature used to characterize thermal damages were quantitatively analyzed,including porosity,pore size distribution,specific surface area,sphericity, and ubiquitiformal complexity.Through qualitative and quantitative observation of the mesostucture, the thermal damage mode and evolution of RDX-based PBXs with increasing temperature were obtained. This study provides physical basisfor investigating the sensitization mechanism of thermal damage on explosive ignition response and establishing a ubiquitiformal model for the ignition reaction evolution of damaged explosives.
BERGHOUT H L , SON S F , SKIDMORE C B , et al. Combustion of damaged PBX 9501 explosive [J ] . Thermochimica Acta , 2002 , 384 ( 1/2 ): 261 - 277 .
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