钨丝在空气中电爆炸时流体破裂到相爆炸转变的高速成像
High-Speed Imaging of Transition from Fluid Breakup to Phase Explosion in Electric Explosion of Tungsten Wires in Air
摘要：
高速可见光成像的亚微秒电爆炸的电线在低比能量沉积阈值揭示了三种不同的模式，电线故障电容器充电电压和能量沉积增加。对于2cm长的100微米直径的镀金钨丝，1.9eV/原子的沉积能量产生液柱，该液柱在200微秒的时间尺度上经历流体动力学分裂成具有线直径数量级的半径的液滴。不稳定性增长，柱分裂，液滴聚结遵循经典的瑞利-高原预测的流体柱的不稳定性。高于3.2eV/原子的沉积能量，可以看到线在一帧内（小于3.33微秒）突然转变为微米级液滴和蒸气的膨胀混合物，这在文献中被称为相爆炸。在这两个极限之间，在2.5 eV/原子的沉积能量下，在开始快速膨胀和崩解之前的前10微秒内，线半径不变，这类似于机械不稳定气泡的均匀成核。热力学计算，提出了单独的情况下，在加热过程中获得的温度：低于沸点，接近沸点，并超过沸点。
英文摘要：
High-speed visible imaging of sub-microsecond electric explosion of wires at the low specific energy deposition threshold reveals three distinct modes of wire failure as capacitor charge voltage and energy deposition are increased. For 100 micron diameter gold-plated tungsten wires of 2 cm length, deposited energies of 1.9 eV/atom produces a liquid column that undergoes hydrodynamic breakup into droplets with radii of order of wire diameter on timescales of 200 microseconds. Instability growth, column breakup, and droplet coalescence follow classic Rayleigh-Plateau predictions for instability of fluid column. Above 3.2 eV/atom of deposited energy, wires are seen to abruptly transition to an expanding mixture of micron scale liquid-droplets and vapor within one frame (less than 3.33 microseconds), which has been termed phase explosion in literature. Between these two limits, at 2.5 eV/atom of deposited energy, wire radius is unchanged for the first 10 microseconds before the onset of a rapid expansion and disintegration that resembles homogeneous nucleation of mechanically unstable bubbles. Thermodynamic calculations are presented that separate cases by temperature obtained during heating: below boiling point, near boiling point, and exceeding boiling point.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
