N_2O/C_2H_4/CO_2预混气体火焰传播及爆炸特性的试验研究  

Experimental Investigation of Flame Propagation and Explosion Properties of Premixed Gases N_2O/C_2H_4/CO_2

作　　者：曾祥敏 张玉刚 蒋榕培[3] 李智鹏[3] 徐森[1,4] 李玉艳 刘大斌[1] ZENG Xiang-min;ZHANG Yu-gang;JIANG Rong-pei;LI Zhi-peng;XU Sen;LI Yu-yan;LIU Da-bin(School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Xuzhou Public Security Bureau,Xuzhou Jiangsu 221000,China;Beijing Institute of Aerospace Testing Technology,Beijing 100074,China;National Quality Supervision and Inspection Center for Industrial Explosive Materials,Nanjing 210094,China)

机构地区：[1]南京理工大学化工学院,江苏南京210094 [2]徐州市公安局,江苏徐州221000 [3]北京航天试验研究所,北京100074 [4]国家民用爆破器材质量监督检验中心,江苏南京210094

出　　处：《火炸药学报》2018年第5期501-505,共5页Chinese Journal of Explosives & Propellants

基　　金：武器装备探索研究项目(No.7131549)

摘　　要：为了研究N_2O/C_2H_4/CO_2预混气体的火焰传播及爆炸特性,采用内含螺旋加速环,长200cm、内径1.5cm的有机玻璃管装置,用电阻丝点火的方式进行预混气体的燃烧爆炸试验;利用压力传感器测量爆炸压力和爆轰速度,并利用高速摄影仪测量燃烧时的火焰速度;采用C-J理论计算了预混气体的理论爆速和理论爆压。结果表明,预混气体在燃烧管内快速燃烧,火焰呈对称的Tulip结构,最大火焰速度为2 235.2m/s;除距离点火10cm处外,其余7个传感器压力陡然上升,均出现冲击波,其中100cm处的压力峰值最大为4.66MPa,冲击波的最大速度为2 247m/s;C-J理论爆速为2 366.75m/s,理论爆压为4.26MPa,最大火焰速度和最大冲击波速度与C-J理论爆轰速度的偏差分别为5.54%和5.06%,试验结果与理论值基本一致。To study the flame propagation and explosion characteristics of premixed gases N2O/C2H4/CO2,the organic glass tube device with a spiral accelerating ring,length of 200 cm and inner diameter of 1.5cm was used to conduct the combustion and explosion experiments of premixed gases by means of resistance wire ignition.The pressure sensors were used to measure the explosion pressure and detonation velocity and high-speed camera was used to measure the flame speed during combustion.The theoretical detonation velocity and theoretical detonation pressure of premixed gas were calculated by C-J theory.Results show that premixed gas rapidly burns in the combustion tube and the flame has a symmetrical Tulip structure,the maximum flame speed is 2 235.2 m/s.Except at 10cm from ignition,the pressure of other seven sensors increases suddenly and all of them present shock wave,in which,the maximum peak pressure at 100 cm is 4.66 MPa.and the maximum velocity of shock wave is 2 247 m/s.The theoretical detonation velocity of C-J is 2 366.75 m/s and the theoretical detonation pressure is 4.26 MPa,the deviations of the maximum flame speed and maximum shock wave velocity with theoretical detonation velocity of C-J are 5.54%and 5.1%,respectively.The experimental results are basically consistent with the theoretical values.

关 键 词：氧化亚氮 燃烧 火焰传播 爆燃转爆轰 爆轰波 N2O/C2H4/CO2 预混气体 N2O基推进剂 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O643.2[理学—物理化学]