几何尺寸对DNAN基熔铸炸药慢烤响应特性的影响

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英文篇名：Effect of Geometric Dimensions on Slow Cook-off Response Characteristics of DNAN-based Melt-casting Explosive 作者：刘子德 ; 智小琦 ; 王帅 ; 周捷 ; 王雪 ; 范兴华 英文作者：LIU Zi-de;ZHI Xiao-qi;WANG Shuai;ZHOU Jie;WANG Xue;FAN Xing-hua;National Defence Key Subject Laboratory of Underground Target Damage Technology, North University of China;Jinxi Industries Group Co.; 关键词：物理化学 ; DNAN基熔铸炸药 ; 慢烤试验 ; 几何尺寸 ; 升温速率 ; 响应特性 英文关键词：physical chemistry;;DNAN-based melt-casting explosive;;slow cook-off test;;geometric dimension;;heating rate;;response characteristics 中文刊名：BGXB 英文刊名：Chinese Journal of Explosives & Propellants 机构：中北大学地下目标毁伤技术国防重点实验室;晋西工业集团有限责任公司; 出版日期：2019-02-15 出版单位：火炸药学报 年：2019 期：v.42;No.203 语种：中文; 页：BGXB201901012 页数：6 CN：01 ISSN：61-1310/TJ 分类号：71-76

摘要

为研究几何尺寸对DNAN基熔铸炸药热反应规律的影响,自行设计了慢烤试验装置,采用多点测温慢烤试验方法,分别在1°C/min和3.3°C/h两种升温速率下进行了4种尺寸(Φ19mm×19mm、Φ19mm×38mm、Φ19mm×76mm、Φ30mm×30mm)弹药的慢烤试验,建立了炸药慢烤试验计算模型,采用Fluent软件计算了升温速率3.3℃/h下一维、二维方式几何尺寸增加时烤燃弹的响应情况。结果表明,几何尺寸和升温速率共同影响烤燃弹的响应特性;对相同烤燃弹,在升温速率3.3℃/h下加热响应等级比升温速率1℃/min下的更剧烈;在升温速率3.3℃/h下,烤燃弹点火位置均位于几何中心,并且随着几何尺寸的增加,点火时刻烤燃弹的外壁温度逐渐降低,烤燃弹存在发生点火反应的最低环境温度为174.74℃,且当药柱长径比为4时,点火时刻外壁温度随着药柱直径的增加呈指数衰减趋势。
        To study the effect of geometric dimensions on the thermal reaction law of DNAN-based melt-casting explosive, a slow cook-off test device was self-designed. The slow cook-off test of ammunition with four sizes of Φ19 mm×19 mm、Φ19 mm×38 mm、Φ19 mm×76 mm and Φ30 mm×30 mm was carried out under the two heating rates of 1℃/min and 3.3℃/h respectively by means of multi-point temperature measurement method. The calculation model of slow cook-off test of explosive was established. The response of cook-off bomb was calculated by Fluent software when the geometric dimensions increased in one-dimension and two-dimension way at a heating rate of 3.3℃/h. The results show that the geometric dimensions and heating rate affect the response characteristics of cook-off bomb together. For the same cook-off bomb, the heating response level at a heating rate of 3.3℃/h is more severe than that of at a heating rate of 1℃/min. At a heating rate of 3.3℃/h, the ignition position of the cook-off bomb is located in the geometric center, and with the increase of the geometric dimensions, the temperature of outer wall of cook-off bomb gradually decreases at the ignition time, the cook-off bomb exits the lowest ambient temperature of 174.74℃ when the ignition reaction occurs, and when the length-to-diameter ratio of grain is 4, the temperature of the outer wall at the ignition time decreases exponentially with the increase of grain diameter.

引文

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