Comparison of different methods of measurement of pressure of underwater shock waves generated by electrical discharge

Sayapin, A.; Grinenko, A.; Efimov, S.; Krasik, Ya. E.

doi:10.1007/s00193-006-0011-8

Cited by 42 publications

(16 citation statements)

References 12 publications

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“…The absence of parasitic surface plasma and the almost negligible radial expansion of the wire prior to its explosion allows one to study solid-liquid-vapor phase transitions by visualization of weak shocks, the formation of which should be related to the onset of these transitions. In earlier experiments 45,46 of underwater electrical wire explosions, weak shocks in water were observed. It was suggested that the onset of these shocks corresponds to phase transitions of the exploding wires; however, a detailed analysis of the energy density deposited into the wire prior to these events and their relation to the energy required for complete phase transitions was not performed.…”

Section: Introductionmentioning

confidence: 98%

Phase transitions of copper, aluminum, and tungsten wires during underwater electrical explosions

et al. 2018

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Using streak images of underwater electrically exploding copper, aluminum, and tungsten wires (current densities of 10 7-10 8 A/cm 2 and energy density deposition of 10-50 kJ/g) and generated weak shocks, the onset of each phase transition, its duration, and the time when the wire explosion occurred were determined. The measured discharge current and resistive voltage were used to calculate the energy and energy density deposition. Using the discharge current waveform and the onset of the strong shock wave, the specific action integral was calculated and compared with published data. The thermodynamic parameters during the wire explosion were calculated using one-dimensional magneto-hydrodynamic simulations coupled with equations of state for water, copper, and aluminum. It was shown that the onset times of weak shocks, in general, cannot be related to the melting or the evaporation of the entire wire.

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Section: Introductionmentioning

confidence: 98%

Phase transitions of copper, aluminum, and tungsten wires during underwater electrical explosions

et al. 2018

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“…The manganese-copper manometer is a kind of piezoresistive pressure probe, usually used to measure ultrahigh pressures, which can be as high as ~100 GPa, but it has the shortcoming of large deviations and is hard to work with under discharge conditions [ 12 ]. Carbon-based pressure sensors, as another piezoresistive sensor type, have higher sensitivity, but bad linearity, and are often used to measure the arrival time of SWs [ 13 , 14 ]. Quartz, piezoelectric ceramics, tourmaline, polyvinylidene fluoride (PVDF), etc.…”

Section: Introductionmentioning

confidence: 99%

“…Quartz probes are not hydrostatically sensitive, and their edges must be constrained, which may reduce the resonant frequency and decrease the available bandwidth [ 15 ]. Besides, this kind of probe has to be well protected from the SW, because it is easily destroyed by high pressure [ 13 ] if placed near the blast source. Tourmaline, as a kind of natural crystal, is hydrostatically sensitive, and has higher piezoelectric constants.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the pressure sensors often work totally immersed in water, which calls for an impeccable waterproofing treatment. A proper acoustic impedance matching and effective electromagnetic shielding are also necessary to reduce the signal distortion and noise [ 13 , 21 ]. This ultra-wideband SW signal puts very high demands on the frequency response characteristics of pressure sensors.…”

Section: Introductionmentioning

confidence: 99%

“…A proper acoustic impedance matching and effective electromagnetic shielding are also necessary to reduce the signal distortion and noise [ 13 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Signal Analysis and Waveform Reconstruction of Shock Waves Generated by Underwater Electrical Wire Explosions with Piezoelectric Pressure Probes

Zhou

Zhang

Han

et al. 2016

Sensors

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Underwater shock waves (SWs) generated by underwater electrical wire explosions (UEWEs) have been widely studied and applied. Precise measurement of this kind of SWs is important, but very difficult to accomplish due to their high peak pressure, steep rising edge and very short pulse width (on the order of tens of μs). This paper aims to analyze the signals obtained by two kinds of commercial piezoelectric pressure probes, and reconstruct the correct pressure waveform from the distorted one measured by the pressure probes. It is found that both PCB138 and Müller-plate probes can be used to measure the relative SW pressure value because of their good uniformities and linearities, but none of them can obtain precise SW waveforms. In order to approach to the real SW signal better, we propose a new multi-exponential pressure waveform model, which has considered the faster pressure decay at the early stage and the slower pressure decay in longer times. Based on this model and the energy conservation law, the pressure waveform obtained by the PCB138 probe has been reconstructed, and the reconstruction accuracy has been verified by the signals obtained by the Müller-plate probe. Reconstruction results show that the measured SW peak pressures are smaller than the real signal. The waveform reconstruction method is both reasonable and reliable.

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Environmental and Biological Applications for Pulsed Discharge Plasma

Wang

2023

Springer Series in Plasma Science and Technology

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Comparison of different methods of measurement of pressure of underwater shock waves generated by electrical discharge

Cited by 42 publications

References 12 publications

Phase transitions of copper, aluminum, and tungsten wires during underwater electrical explosions

Phase transitions of copper, aluminum, and tungsten wires during underwater electrical explosions

Signal Analysis and Waveform Reconstruction of Shock Waves Generated by Underwater Electrical Wire Explosions with Piezoelectric Pressure Probes

Environmental and Biological Applications for Pulsed Discharge Plasma

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