Hydrodynamic effects in liquids subjected to pulsed low current arc discharges
Hydrodynamic effects in liquids subjected to pulsed low current arc discharges
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DOI：
10.1088/0022-3727/37/10/014
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
E. Gidalevich;R. Boxman;S. Goldsmith
中科院分区：
文献类型：
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作者：
E. Gidalevich;R. Boxman;S. Goldsmith
本文从理论上分析了与小电流放电有关的液体流体动力学现象，并将径向等离子体柱膨胀视为一种任意不连续性传播。当放电通道初始半径R0 = 10 − 6和10 − 5 m时，放电电流I = 1 A时，放电通道初始温度T0 = 1.4 × 106和6.5 × 104 K;当放电电流I = 10 A时，放电通道初始温度T0 = 6.5 × 106和3 × 105 K。由于径向等离子体柱膨胀，温度在最初的10 - 8 s内下降。在最初的10 − 8 s期间，等离子体柱膨胀的速度超过了未扰动水中的声速（5 - 15倍），在水中产生了压力不连续性为10 - 10 5 atm，松弛长度为10 − 4 m的冲击波。
Hydrodynamic phenomena in liquids associated with low current electrical discharges were analysed theoretically and the radial plasma column expansion was considered as an arbitrary discontinuity propagation. For assumed initial discharge channel radii of R0 = 10 −6 and 10 −5 m, the initial temperatures in the discharge channel was found to be T0 = 1.4 × 10 6 and 6.5 × 10 4 K for a discharge current of I = 1 A, and T0 = 6.5 × 10 6 and 3 × 10 5 K for I = 10 A. The temperature decreases during the initial ∼10 −8 s, due to radial plasma column expansion. During the initial 10 −8 s the velocity of the plasma column expansion exceeds the speed of sound in the undisturbed water (by 5–15 times), creating a shock wave in the water with a pressure discontinuity of ≈10 5 atm, and a relaxation length of 10 −4 m.