真空及空气中金属丝电爆炸特性研究

发布时间：2018-06-06 16:31

本文选题：金属丝电爆炸 + Z箍缩　；参考：《物理学报》2017年18期

【摘要】：开展了铝丝在真空和空气环境中的电爆炸特性研究.从金属丝电爆炸的电压、电流波形得到了金属丝内的沉积能量,并基于以上电参数特征分析了电爆炸产物的状态,获得了空气中铝丝电爆炸电流暂停时间随初级储能电容充电电压的变化规律.真空和空气中铝丝电爆炸在电压击穿时刻的沉积能量分别为2.8和6 eV/atom.采用波长为532 nm、亚纳秒激光探针对金属丝电爆炸物理过程开展了高时空分辨率的阴影和纹影诊断.阴影图像清晰地展示了不同气氛环境中高密度电爆炸产物的膨胀过程,根据光学诊断图像分析了高密度丝核沉积能量的结构和空气中铝丝电爆炸产生的激波的膨胀轨迹.真空和空气环境中高密度电爆炸产物的平均膨胀速度分别为1.9和3 km/s.基于实验数据和输运参数模型,估算了金属丝在电压击穿时刻的温度.
[Abstract]:The electrical explosion characteristics of aluminum wire in vacuum and air environment were studied. The deposition energy in the wire is obtained from the voltage and current waveform of the electric explosion of the wire, and the state of the electric explosion product is analyzed based on the characteristics of the above electrical parameters. The change of electric explosion current pause time of aluminum wire in air with the charge voltage of primary energy storage capacitor is obtained. The deposition energy of electric explosion of aluminum wire in vacuum and air at voltage breakdown time is 2.8 and 6 EV / atom, respectively. High temporal and spatial resolution shadow and schlieren diagnosis have been carried out by using a subnanosecond laser probe at wavelength of 532 nm for the physical process of electrical explosion of metal wire. The shadow images clearly show the expansion process of the high density electrical explosion products in different atmosphere. According to the optical diagnostic images, the structure of the high density wire nuclear deposition energy and the expansion track of the shock wave caused by the aluminum wire electric explosion in the air are analyzed. The average expansion rates of the high density electrical explosion products in vacuum and air environment are 1.9 and 3 km / s, respectively. Based on experimental data and transport parameter model, the temperature of wire at voltage breakdown time is estimated.
【作者单位】：河北工业大学河北省电磁场与电器可靠性省部共建重点实验室;西安交通大学电力设备电气绝缘国家重点实验室;
【基金】：国家自然科学基金(批准号:51322706,51237006,51325705) 河北省高等学校青年拔尖人才(批准号:BJ2017038)资助的课题~~
【分类号】：TG146.21

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