摘要
为了研究点火电阻发火过程中温度的动态变化,解决储能电容-点火电阻体系的匹配性问题,通过电热实验、红外温度测量和数值模拟方法,对不同电容放电电压下点火电阻的电压-电流变化和温度变化进行测量,并结合未熔断样品的表面情况,确定点火电阻的临界熔断电压,得出点火电阻的电特性规律和温度变化规律。结果表明:在相同电压下,桥膜式直线型点火电阻的熔断时间最短;相同阻值下,桥膜式点火电阻的熔断时间和升温时间比桥丝式更短,能达到的最高温度也更高。数值仿真结果与实验数据吻合良好,验证了模型的准确性,同时揭示了桥丝式和桥膜式S型点火电阻在通电过程中热量易在拐角处积累并率先发生相变的规律。
In order to study the dynamic changes of temperature during the ignition process of the ignition resistor and solve the matching problem of the energy storage capacitor-ignition resistor system,this study measures the voltage-current changes and temperature changes of the ignition resistor under different capacitor discharge voltages through electrothermal experiments,infrared temperature measurement and numerical simulation methods.Combined with the surface conditions of the unmelted samples,the critical fuse voltage of the ignition resistor was determined,and the law of the electrical characteristic curve and the temperature variation law of the ignition resistor were obtained.The results show that under the same voltage,the bridge membrane straight type has the shortest melting time.Under the same resistance value,the melting time and heating time of the bridge-film ignition resistor are shorter than those of the bridge-wire type,and the maximum temperature it can reach is also higher.For the bridge-wire type and bridge-film S type ignition resistors,heat is prone to accumulate at the corners and phase change occurs first during the power-on process.
作者
李洪伟
张立果
周恩
梁昊
杨霖
章万龙
LI Hongwei;ZHANG Liguo;ZHOU En;LIANG Hao;YANG Lin;ZHANG Wanlong(School of Chemical and Blasting Engineering,Anhui University of Science and Technology,Huainan 232000,Anhui,China;Huainan Shuntai Chemical Co.,Ltd.,Huainan 232000,Anhui,China)
出处
《高压物理学报》
北大核心
2026年第2期115-132,共18页
Chinese Journal of High Pressure Physics
基金
安徽高校自然科学研究项目(2022AH050838)。
关键词
电子雷管
点火电阻
焦耳热
熔断电压
温度分布
COMSOL
electronic detonator
ignition resistor
Joule heat
fuse voltage
temperature distribution
COMSOL
