基于微波相移原理的燃烧转爆轰过程波速测量方法及应用  

Measurement Method and Application for Wave Velocity during Deflagration-to-detonation Transition Based on Microwave Phase-shifting Principle

作　　者：仪建华[1] 秦钊[1] 李海建 王长健[1] 张超[1] 冯晓军[1] 许毅[1] 孙志华[1] 赵凤起[1] YI Jian-hua;QIN Zhao;LI Hai-jian;WANG Chang-jian;ZHANG Chao;FENG Xiao-jun;XU Yi;SUN Zhi-hua;ZHAO Feng-qi(Science and Technology on Combustion and Explosion Laboratory,Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]西安近代化学研究所燃烧与爆炸技术重点实验室,陕西西安710065

出　　处：《火炸药学报》2021年第4期532-537,共6页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.21905224,No.21473130,No.22075226);陕西省自然科学基金(No.2020JQ-984);核废物与环境安全国防重点学科实验室基金(No.19kfhk05)。

摘　　要：为了研究火炸药及装药燃烧转爆轰(DDT)过程及其机理,探索了一种DDT过程波速实时测量方法——微波相移测速方法,其基本原理是将DDT过程中由波阵面运动而引起的微波频率和相位的变化精确地测量出来,从而实时获得波阵面的运动速度;阐述了测量系统的组成、标定方法、试验设计及程序等;将该方法应用于高能硝胺发射药DDT过程,获得了DDT过程中的重要规律;探讨了高能发射药容易发生DDT的原因。结果表明,微波相移测速方法抗干扰能力强,采样频率高,所得信息量大,弥补了传统测量技术(如电离探针技术等)的不足;利用该方法获得了某高能硝胺发射药DDT过程中波速与位移信息,样品管爆裂前DDT过程的主要阶段及其特征数据和变化规律得到了精确的阐明,可为高孔隙率发射装药DDT控制研究提供重要的技术支撑。In order to study the process and mechanism of deflagration to detonation transition(DDT)of propellants,explosives and their charges,a real-time measurement method of wave velocity during DDT process,microwave phase-shifting velocity measurement method,is explored.Its basic principle is to accurately measure the shifting of microwave frequency and phase caused by the movement of wave front during DDT process,and further the movement velocity of wave front in real time is obtained.The composition,calibration method,test design and program of the measurement system are described.The method was applied for the DDT process of high energy nitramine gun propellant,and important rules during the DDT process were obtained.The causes of DDT of high-energy gun propellant were discussed.The results show that the microwave phase-shifting velocimetry has strong anti-interference ability,high sampling frequency and large amount of information,which makes up for the shortcomings of traditional measurement technologies(such as ionization probe technology).By using this method,the information of wave velocity and displacement during the DDT process of a high-energy nitramine gun propellant were obtained,and the main stages,characteristic data and variation law of the DDT process before sample tube burst were accurately clarified,which could provide important technical support for the DDT control research of high porosity propellant charge.

关 键 词：物理化学 燃烧转爆轰(DDT) 微波相移原理 波速 高能发射药 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]