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纳米含能材料的一个基本分形热传导理论模型 预览

An Elementary Fractal Thermal Conduction Theory Model for Nanometer Energetic Materials
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摘要 基于分形理论和热传导理论,分析了含能材料的感度、热传导和分形维数之间的相关性,建立了含能材料的分形热传导模型;为验证模型的正确性,对两种不同粒度硝铵炸药的粒度分形维数和表面分形维数进行了计算,并且通过模型计算了其有效热传导率。结果表明,纳米RDX的轴向有效热传导率(kt)和径向有效热传导率(kr)比微米RDX的kt和kr分别高0.204和0.059W/mK;纳米HMX的kt和kr比微米RDX的kt和kr分别高0.079和0.426W/mK;表明纳米含能材料比微米含能材料具有更高的有效热传导率,有利于增大热量散失、降低热点温度,从而表现出更低的感度。因此利用分形热传导模型可以评价含能材料的感度。 Based on fractal theory and heat conduction theory,the correlation among sensitivity,heat conduction,and fractal dimension of energetic materials were analyzed.Meanwhile,the fractal heat conduction models of micro and nano energetic materials were established.To verify the correctness of the model,the size fractal dimension and surface fractal dimension of two kinds of nitroamine explosives with different particle size were calculated,and the thermal conductivity was calculated by the model.The results show that the tangential effective thermal conductivity(kt)and radial effective thermal conductivity(kr)of nano RDX were higher by 0.204 and 0.059 W/mk than kt and kr of raw RDX,respectively.The kt and kr of nano HMX were higher by 0.079 and 0.426 W/mK than kt and kr of raw HMX,respectively.This meant that nano energetic materials were of higher effective thermal conductivity than micron energetic materials,which quite benefited to dissipating of the heat and decreasing of temperature of hot spots.Thus,nano energetic materials exhibited lower sensitivities.It is also concluded that the sensitivity of energetic materials can be assessed by means of the models.
作者 王毅 宋小兰 黄浩 李凤生 WANG Yi;SONG Xiao-lan;HUANG Hao;LI Feng-sheng(School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China;China North Industries Group Corporation Limited, Beijing 100821, China;School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
出处 《火炸药学报》 CSCD 北大核心 2018年第6期554-561,共8页 Chinese Journal of Explosives & Propellants
基金 Weapons and Equipment Pre-research Fund (No.6140656020201).
关键词 纳米含能材料 分形理论 热传导模型 RDX HMX nanometer energetic materials fractal theory thermal conduction models RDX HMX
作者简介 WANG Yi (1980-),male,associate professor,reserch direction: energetic material.E-mail: wangyi528528@aliyun.com
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