Validation of a detonation product equation of state for an insensitive high explosive via slab geometry expansion tests
Validation of a detonation product equation of state for an insensitive high explosive via slab geometry expansion tests
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通过板几何膨胀试验验证不敏感高爆炸药的爆炸产物状态方程
DOI：
10.1063/5.0153435
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发表时间：
2023
影响因子：
3.2
通讯作者：
S. Jackson
中科院分区：
文献类型：
--
作者：
E. Anderson;S. Voelkel;M. Short;C. Chiquete;S. Jackson
为验证高能炸药爆轰产物状态方程(EOS)的标定方法，进行了SLABEX实验。SLABEX测试使用PBX9502的长方形平板，PBX9502是一种聚合物结合的HE配方，由95 重量%的1，3，5-三氨基-2，4，6-三硝基苯与Kel F-800结合而成，Kel F-800是三氟氯乙烯和偏氟乙烯的共聚物。检查了三种PBX 9502板厚，每一种都由两块约为HE板厚十分之一的长方形铜(铜)板对称约束。在每个实验期间，沿PBX 9502板材中心轴线的爆轰流保持为二维。测量了膨胀铜板外表面的横向速度分量，以及沿SLABEX中心轴线的稳定轴向爆速。采用Jones-Wilkins-Lee状态方程，对SLABEX几何结构中的铜板膨胀进行了流体力学模拟，模拟结果表明，爆炸燃烧事件储存在爆轰产物中的能量驱动了铜板的膨胀。最近使用新开发的校准技术[Voelkel等人，Burust]对PBX 9502在气瓶膨胀测试几何形状中的该EOS形式进行了参数化。火焰246,112373(2022年)]。在每一次SLABEX测试中，实验和预测之间都发现了很好的一致性，这表明爆轰产物状态方程定标技术产生的EOS在应用于其他几何形状时是可以预测的。
Slab expansion (SLABEX) tests are conducted to validate a process for calibrating the detonation products equation of state (EOS) of a high explosive (HE). The SLABEX tests use rectangular slabs of PBX 9502, a polymer-bonded HE formulation consisting of 95 wt.% 1,3,5-triamino-2,4,6-trinitrobenzene bound with Kel F-800, a co-polymer of chlorotrifluoroethylene and vinylidene-fluoride. Three PBX 9502 slab thicknesses are examined, each confined symmetrically by two rectangular copper (Cu) plates approximately one-tenth the thickness of the HE slab. For the duration of each experiment, the detonation flow along the central axis of the PBX 9502 slab remains two-dimensional. The lateral flow velocity component of the outer surfaces of the expanding Cu plates is measured, along with the steady axial detonation speed along the central axis of the SLABEX. Hydrodynamic simulations of the Cu plate expansion in the SLABEX geometry, driven by the energy stored in the detonation products by the detonation combustion event, are conducted using a Jones–Wilkins–Lee EOS for the detonation products. This EOS form was recently parameterized for PBX 9502 in the cylinder expansion test geometry using a newly developed calibration technique [Voelkel et al., Combust. Flame 246, 112373 (2022)]. Good agreement between the experiment and prediction is found in each SLABEX test, demonstrating that the detonation product EOS calibration technique produces EOSs that are predictive when applied to other geometries.