CN114217662B - Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology - Google Patents
Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology Download PDFInfo
- Publication number
- CN114217662B CN114217662B CN202111396338.XA CN202111396338A CN114217662B CN 114217662 B CN114217662 B CN 114217662B CN 202111396338 A CN202111396338 A CN 202111396338A CN 114217662 B CN114217662 B CN 114217662B
- Authority
- CN
- China
- Prior art keywords
- voltage
- volt
- wave head
- rock
- critical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is ac or dc
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention discloses a method and a system for determining a matched voltage wave head of a high-voltage pulse rock breaking technology, and belongs to the technical field of high-voltage discharge. The method comprises the following steps: measuring discrete volt-second characteristics of the rock and the insulating liquid; performing curve fitting on discrete volt-second characteristics of the rock and the insulating liquid to obtain a volt-second characteristic curve; obtaining critical wave head time according to volt-second characteristic curves of rocks and insulating liquid; obtaining a critical volt-second characteristic curve and matching wave head time according to the critical wave head time; and obtaining the critical breakdown voltage according to the critical volt-second characteristic curve and the matching wave head time, and further determining the peak value of the matching voltage. The method for determining the matching voltage wave head provided by the invention can select the proper matching voltage wave head aiming at different types of rocks and insulating liquid, so that the probability of forming a plasma channel in the rocks is improved, and the probability of forming the plasma channel in the insulating liquid is reduced, thereby improving the crushing efficiency of the high-voltage pulse rock crushing technology, optimizing the crushing effect and saving the cost.
Description
Technical Field
The invention belongs to the technical field of high-voltage discharge, and particularly relates to a method and a system for determining a matched voltage wave head of a high-voltage pulse rock crushing technology.
Background
In the occasions of piling, drilling and the like, the traditional mechanical drill bit is generally adopted to crush the rock, and the high-speed rotation of the drill bit overcomes the compressive strength of the rock to crush the rock, but the method has the defects of low efficiency, high drill bit abrasion speed, slower drilling speed in the deeper part and the like. The high voltage pulse rock crushing technology discharges the rock to form a plasma channel inside the rock, and the plasma channel expands outwards during discharging due to the characteristics of high temperature and high pressure, so that rock crushing is realized. The high-voltage pulse rock breaking technology needs to overcome the tensile strength of the rock, and the tensile strength of the rock is only about 10% of the compressive strength, so the high-voltage pulse rock breaking technology has the advantages of high energy utilization rate, no need of considering the hardness of the rock and the like.
In high voltage pulse lithotripsy techniques, the electrodes are usually placed on the same surface of the rock, with the area outside the rock being gas or liquid. In order to form a plasma channel inside the rock, the applied voltage needs to be higher than the breakdown voltage of the solid. For a typical voltage waveform, the breakdown voltages of gases and liquids are much lower than that of solids, so the plasma channel will form in gases or liquids other than rock, but not in rock. Research shows that a certain critical wave head time exists, when the voltage wave head time is less than the critical wave head time, the breakdown voltage of the liquid is higher than that of the rock, the liquid can be used as insulating liquid, and a plasma channel is formed in the rock, so that rock breaking is realized.
Since different rocks and insulating fluids have different electrical strengths, there are different critical wave head times for different combinations of rocks and insulating fluids. If the voltage wave head is not properly selected, a plasma channel cannot be formed in the rock, the rock crushing effect is poor, and greater energy loss can be caused, so that the rock crushing efficiency of the technology is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method and a system for determining a matched voltage wave head of a high-voltage pulse rock crushing technology, and aims to solve the problem of low probability of forming a plasma channel in rock when the high-voltage pulse rock crushing technology is applied.
In order to achieve the above object, one aspect of the present invention provides a method for determining a matching voltage wave head in a high voltage pulse rock-breaking technology, including:
(1) measuring discrete volt-second characteristics of the rock and the insulating liquid;
(2) performing curve fitting on the discrete volt-second characteristics of the rock and the insulating liquid to obtain a volt-second characteristic curve;
(3) obtaining critical wave head time according to the volt-second characteristic curve of the rock and the insulating liquid;
(4) obtaining a critical volt-second characteristic curve according to the critical wave head time;
(5) determining the matching wave head time according to the critical wave head time;
(6) and obtaining the critical breakdown voltage according to the critical volt-second characteristic curve and the matching wave head time, and further determining the peak value of the matching voltage.
Further, in the step (1), the method for measuring the discrete volt-second characteristic of the rock comprises the following steps:
the method comprises the steps of selecting rocks with the thickness equal to the distance between electrodes under actual working conditions, adopting rod-shaped electrodes as a high-voltage electrode and a grounding electrode, respectively placing the two electrodes on the upper surface and the lower surface of the rocks, applying impact voltages with fixed wave tail time, different wave head time and different amplitudes, and obtaining breakdown voltages corresponding to different breakdown times. At least 10 sets of experiments were performed at the same voltage amplitude. In practical application, the electrode is placed on the same side of the rock, the insulating liquid is placed on the upper side of the rock, and referring to fig. 2, in the arrangement, it is difficult to ensure that a plasma channel is formed in the rock, and the breakdown voltage of the rock is higher than that of the rock when the electrode is placed on both sides of the rock, so that the maximum value of the breakdown voltage corresponding to each measured breakdown time is multiplied by a conversion coefficient k and then is taken as a discrete point, wherein the value range of k is usually 1.1 to 1.3, and the specific value is related to the property of the rock.
Further, in the step (1), the method for measuring the discrete volt-second characteristic of the insulating liquid includes:
the high-voltage electrode and the grounding electrode are both rod-shaped electrodes, the two electrodes are completely immersed in insulating liquid and are oppositely arranged, the distance between the two electrodes is equal to the thickness of the rock, and the impact voltages with fixed wave tail time, different wave head time and different amplitudes are applied to obtain the breakdown voltages corresponding to different breakdown times. At least 10 groups of experiments are carried out under the same voltage amplitude, and the minimum value of the breakdown voltage corresponding to each breakdown time is selected as a discrete point.
Further, in the step (2), the method for obtaining the rock volt-second characteristic curve includes:
and performing curve fitting on the discrete volt-second characteristic of the rock, wherein the fitting formula is as follows:
U r ＝-a 1 lg(t)+b 1
wherein U is r Is the breakdown voltage of the rock in kV, t is the breakdown time in mus, a 1 、b 1 As fitting parameters, a 1 >0，b 1 >0。
Further, in the step (2), the method for obtaining the volt-second characteristic curve of the insulating liquid comprises the following steps:
and performing curve fitting on the discrete volt-second characteristic of the insulating liquid, wherein the fitting formula is as follows:
U l ＝-a 2 lg(t)+b 2
wherein U is l Is the breakdown voltage of the insulating liquid in kV, a 2 、b 2 As fitting parameters, a 2 >0，b 2 >0。
Further, in the step (3), the method for obtaining the critical wave head time includes:
the fitting formulas of the volt-second characteristics of the rock and the insulating liquid are equal to meet the following requirements:
U r ＝U l
the calculation result of the breakdown time t in the above formula represents the critical wave head time t 0 。
Further, in the step (4), a part of the rock volt-second characteristic curve, where the breakdown time is less than the critical wave head time, is selected as the critical volt-second characteristic curve.
Further, in the step (5), the selected matching wave head time t 1 Satisfies the following conditions:
t 1 ＜t 0
further, in the step (6), the critical breakdown voltage U 1 Comprises the following steps:
U 1 ＝-a 1 lg(t 1 )+b 1
further, in the step (6), the selected matching voltage peak value U m Satisfies the following conditions:
U m ＞rU 1
and r is a margin coefficient, the value of r needs to be more than 1, and the value of r is taken according to the actual working condition.
In another aspect, the present invention provides a system for determining a matching voltage wave head in a high voltage pulse rock crushing technology, including: a computer-readable storage medium and a processor;
the computer readable storage medium is used for storing executable instructions;
the processor is used for reading executable instructions stored in the computer-readable storage medium and executing the matching voltage wave head determination method of the high-voltage pulse rock breaking technology.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the method for determining the matching voltage wave head can obtain the proper voltage wave head, improve the probability of forming the plasma channel in the rock, reduce the probability of forming the plasma channel in the insulating liquid, improve the energy utilization efficiency and optimize the rock breaking effect.
(2) The method adopts a form of combining a logarithmic function and a linear function to fit the volt-second characteristic, and has good fitting effect and simple calculation process.
Drawings
Fig. 1 is a flowchart of a method for determining a matching voltage wave head in a high-voltage pulse rock breaking technology according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of a high voltage pulse rock breaking technique;
FIG. 3 is a schematic diagram of the determination of discrete volt-second characteristics of rock;
FIG. 4 is a schematic diagram of the measurement of discrete volt-second characteristics of an insulating fluid;
FIG. 5 is a plot of discrete volt-seconds and volt-seconds characteristics of rock and insulating fluid;
FIG. 6 is a volt-second characteristic curve, a critical volt-second characteristic curve and a critical wave head time of the rock and the insulating fluid.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method for determining a matched voltage wave head of a high-voltage pulse rock crushing technology, which comprises the following steps:
(1) measuring discrete volt-second characteristics of the rock and the insulating liquid;
(2) performing curve fitting on the discrete volt-second characteristics of the rock and the insulating liquid to obtain a volt-second characteristic curve;
(3) obtaining critical wave head time according to the volt-second characteristic curve of the rock and the insulating liquid;
(4) obtaining a critical volt-second characteristic curve according to the critical wave head time;
(5) determining the matching wave head time according to the critical wave head time;
(6) and obtaining the critical breakdown voltage according to the critical volt-second characteristic curve and the matching wave head time, and further determining the peak value of the matching voltage.
Referring to fig. 1, an embodiment of the present invention provides a method for determining a matching voltage wave head of a high-voltage pulse rock breaking technology, including:
step 1: discrete volt-second characteristics of the rock and insulating fluid were measured.
Specifically, referring to fig. 3, a method of determining discrete volt-second characteristics of rock is as follows. The rock is sandstone, the shape of the rock is cube, the thickness is 10mm, the high-voltage electrode and the grounding electrode are rod-shaped electrodes with the length of 3cm and the diameter of 6mm, and the high-voltage electrode and the grounding electrode are respectively arranged on the upper surface and the lower surface of the rock. And applying impulse voltage with wave head time of 0.12-3 mus, wave tail time of 50 mus and amplitude of 0-200 kV to the high-voltage electrode to obtain breakdown voltage corresponding to different breakdown time. 10 sets of experiments were performed at the same voltage amplitude. For sandstone, the transformation coefficient k takes the value of 1.15. The maximum breakdown voltage value corresponding to each breakdown time is multiplied by a conversion coefficient to be used as a discrete point.
Specifically, referring to fig. 4, a method of measuring the discrete volt-second characteristic of the insulating liquid is as follows. Tap water is selected as the insulating liquid, the high-voltage electrode and the grounding electrode are completely immersed in the insulating liquid, the high-voltage electrode is arranged on the upper side, the grounding electrode is arranged on the lower side, the distance between the high-voltage electrode and the grounding electrode is 10mm, and the high-voltage electrode is applied with impact voltages with wave head time ranging from 0.12 mu s to 3 mu s, wave tail time ranging from 50 mu s and amplitude ranging from 0kV to 300kV, so that the breakdown voltages corresponding to different breakdown times are obtained. 10 sets of experiments are carried out under the same voltage amplitude, and the minimum value of the breakdown voltage corresponding to each breakdown time is selected as a discrete point.
Step 2: and performing curve fitting on the discrete volt-second characteristics of the rock and the insulating liquid to obtain a volt-second characteristic curve.
Specifically, referring to fig. 5, a curve fitting is performed on the discrete volt-second characteristic of the rock, and the fitting formula adopted is as follows:
U r ＝-a 1 lg(t)+b 1
wherein U is r Is the breakdown voltage of the rock in kV, t is the breakdown time in mus, a 1 、b 1 As fitting parameters, a 1 >0，b 1 >0. After fitting, obtain 1 ＝38.42，b 1 ＝84.28。
Specifically, referring to fig. 4, a curve fitting is performed on the discrete volt-second characteristic of the insulating fluid, and the fitting formula adopted is as follows:
U l ＝-a 2 lg(t)+b 2
wherein U is l Is the breakdown voltage of the insulating liquid in kV, a 2 、b 2 As fitting parameters, a 2 >0，b 2 >0. After fitting, obtain 2 ＝190.24，b 2 ＝58.13。
And step 3: and obtaining the critical wave head time according to the volt-second characteristic curve of the rock and the insulating liquid.
In particular, with reference to FIG. 6, the fit equations for the volt-second characteristics of the rock and the insulating fluid are made equal, i.e.
U r ＝U l
Solving the above equation to get t ═ t 0 ＝0.67μs
And 4, step 4: and obtaining a critical volt-second characteristic curve according to the critical wave head time.
Specifically, a part of the rock volt-second characteristic curve, in which the breakdown time is less than the critical wave head time, is selected as the critical volt-second characteristic curve, as shown by the bold part of the solid line in fig. 6.
And 5: and determining the matching wave head time according to the critical wave head time.
In particular, the wave front time t is matched 1 Taken as 0.5 mu s, satisfying t 1 <t 0 。
Step 6: and obtaining the critical breakdown voltage according to the critical volt-second characteristic curve and the matching wave head time, and further determining the peak value of the matching voltage.
Specifically, according to the formula:
U 1 ＝-a 1 lg(t 1 )+b 1
obtaining the critical breakdown voltage U 1 Is 95.85 kV.
According to the formula:
U m ＞rU 1
determining a matching voltage peak value, wherein if the margin coefficient r is 1.2, U is determined m Is 116 kV.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A method for determining a matched voltage wave head of a high-voltage pulse rock crushing technology is characterized by comprising the following steps:
(1) measuring discrete volt-second characteristics of the rock and the insulating liquid;
(2) performing curve fitting on the discrete volt-second characteristics of the rock and the insulating liquid to obtain a volt-second characteristic curve;
(3) obtaining critical wave head time according to the volt-second characteristic curve of the rock and the insulating liquid; the fitting formulas of the volt-second characteristics of the rock and the insulating liquid are equal, namely:
U r ＝U l
the calculated result of the breakdown time t represents the critical wave head time t 0 ；
(4) Obtaining a critical volt-second characteristic curve according to the critical wave head time; the critical volt-second characteristic curve refers to a part of the rock volt-second characteristic curve, wherein the breakdown time is less than the critical wave head time;
(5) determining the matching wave head time according to the critical wave head time; selected matching wave head time t 1 And satisfies the following conditions:
t 1 ＜t 0
wherein, t 0 Critical wave head time;
(6) and obtaining the critical breakdown voltage according to the critical volt-second characteristic curve and the matching wave head time, and further determining the peak value of the matching voltage.
2. The method of determining a matching voltage wave front according to claim 1, wherein in the step (1), the breakdown occurs at the voltage wave front during the measurement of the volt-second characteristic.
3. The method for determining a matching voltage wave-front according to claim 1, wherein in the step (1), at least 10 sets of experiments are performed under the same voltage amplitude; for the rock, multiplying the maximum breakdown voltage value corresponding to each breakdown time by a conversion coefficient k, and taking the maximum breakdown voltage value as a discrete point; and for the insulating liquid, selecting the minimum value of the breakdown voltage corresponding to each breakdown time as a discrete point.
4. The method for determining a matched voltage wave head according to claim 1, wherein in the step (2), the volt-second characteristic curve fitting formula of the rock is as follows:
U r ＝-a 1 lg(t)+b 1
wherein, U r Is the breakdown voltage of the rock in kV, t is the breakdown time in mus, a 1 、b 1 Is a fitting parameter;
the fitting formula of the volt-second characteristic curve of the insulating liquid is as follows:
U l ＝-a 2 lg(t)+b 2
wherein, U l Is the breakdown voltage of the insulating liquid in kV, a 2 、b 2 Are fitting parameters.
5. The method for determining a matching voltage wave-front of claim 1, wherein in step (6), the critical breakdown voltage U 1 Comprises the following steps:
U 1 ＝-a 1 lg(t 1 )+b 1 。
6. the method for determining a matching voltage wave-front according to claim 1, wherein in the step (6), the matching voltage peak value U is m Satisfies the following conditions:
U m ＞rU 1
wherein r is a margin coefficient.
7. A system for determining a matched voltage wave head for a high voltage pulse lithotripsy technique, comprising: a computer-readable storage medium and a processor;
the computer-readable storage medium is used for storing executable instructions;
the processor is configured to read executable instructions stored in the computer-readable storage medium, and execute the method for determining a matching voltage wave head of a high voltage pulse lithotripsy technique according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111396338.XA CN114217662B (en) | 2021-11-23 | 2021-11-23 | Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111396338.XA CN114217662B (en) | 2021-11-23 | 2021-11-23 | Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114217662A CN114217662A (en) | 2022-03-22 |
| CN114217662B true CN114217662B (en) | 2022-09-20 |
Family
ID=80698010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111396338.XA Active CN114217662B (en) | 2021-11-23 | 2021-11-23 | Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114217662B (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2123596C1 (en) * | 1996-10-14 | 1998-12-20 | Научно-исследовательский институт высоких напряжений при Томском политехническом университете | Method for electric-pulse drilling of wells, and drilling unit |
| CN104563882B (en) * | 2013-10-27 | 2017-02-15 | 中国石油化工集团公司 | plasma drilling bit |
| CN105652129B (en) * | 2016-03-18 | 2018-05-25 | 华北电力大学 | The measuring method of electron mobility in a kind of insulating liquid |
| WO2017214738A1 (en) * | 2016-06-15 | 2017-12-21 | Selfrag Ag | Method of treating a solid material by means of high voltage discharges |
| CN108222838B (en) * | 2018-01-18 | 2023-04-07 | 中国地质大学（武汉） | Rock breaking experimental device of electric pulse rock breaking drill bit |
| CN108222839B (en) * | 2018-01-22 | 2023-08-25 | 中国地质大学（武汉） | Multi-electrode pair electrode crushing drill bit and electrode crushing experimental device |
| CN109577859B (en) * | 2018-07-03 | 2020-04-07 | 西南石油大学 | Continuous tube high-voltage electric pulse-mechanical composite rock breaking drilling method |
| CN110215984B (en) * | 2019-07-05 | 2021-04-13 | 东北大学 | High-voltage electric pulse pretreatment method for strengthening galena crushing and sorting |
| CN110566113B (en) * | 2019-09-30 | 2022-03-25 | 中国铁建重工集团股份有限公司 | Rock drill |
| CN110957638B (en) * | 2019-10-16 | 2021-11-23 | 广西大学 | Advanced discharge device and method for realizing dynamic insulation matching |
| CN111475975B (en) * | 2020-03-16 | 2022-03-08 | 西南石油大学 | Design optimization method for high-voltage electric pulse rock breaking tool parameters |
| CN112324418B (en) * | 2020-11-30 | 2022-03-29 | 中国石油集团渤海钻探工程有限公司 | Hydraulic breaking process for underground rock |
| CN113123388A (en) * | 2021-04-30 | 2021-07-16 | 北京三一智造科技有限公司 | Grooving construction method |
-
2021
- 2021-11-23 CN CN202111396338.XA patent/CN114217662B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114217662A (en) | 2022-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190017362A1 (en) | Pipeline descaling and rock stratum fracturing device based on electro-hydraulic pulse shock waves | |
| AU2016424227B2 (en) | Permeability enhancement method for coalbed methane wells by using electric pulse detonation fracturing technology | |
| CN114217662B (en) | Method and system for determining matched voltage wave head of high-voltage pulse rock breaking technology | |
| CN103846304A (en) | ND steel seamless steel pipe production process | |
| CN111475975B (en) | Design optimization method for high-voltage electric pulse rock breaking tool parameters | |
| CN104537216A (en) | Electrochemical prediction method for environmental stress corrosion crack expansion of pipeline high-strength steel | |
| CN113216921A (en) | Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir | |
| CN201206447Y (en) | Energy converter of high energy-gathering high-power electrical pulse device | |
| CN103831270A (en) | Ultrasonic cavitation intensifying device and ultrasonic cavitation intensifying method | |
| Petrov et al. | Electrical breakdown of a dielectric on the voltage pulse trailing edge: Investigation in terms of the incubation time concept | |
| CN109779610B (en) | Method for measuring effective action radius of anti-reflection drilling hole based on controllable shock wave technology | |
| CN210829146U (en) | Pulse discharge switch structure for downhole operation | |
| CN105369256A (en) | Magnesium alloy corrosion inhibitor in car cooling liquid and application of magnesium alloy corrosion inhibitor | |
| Li et al. | Experimental study on pressure wave characteristics of high-voltage discharge in water with hemispherical electrodes | |
| Kang et al. | Reservoir Porosity Improvement Device based on Underwater Pulse Arc Fracturing and Frequency Resonance Technology | |
| Shneerson | Estimation of the pressure in a “slow” spark discharge in a cylindrical water-filled chamber | |
| Martin et al. | Influence of hydrostatic pressure and temperature on the water dielectric strength and on the dynamic pressure wave | |
| CN114169151A (en) | Working parameter design method and system of high-voltage pulse crushing device | |
| CN107799112A (en) | A kind of parameter acquiring method of liquid electric pulse shock wave generator | |
| Luo et al. | Rock fragmentation and drilling experiment of electric impulse drilling and structural optimization of electrode bit | |
| CN101830538A (en) | Omnidirectional ultrasonic algae-removing instrument | |
| Yan et al. | Experimental Study on the Discharging Characteristics of Pulsed High-voltage Discharge Technology in Oil Plug Removal | |
| Martin et al. | A new formula for predicting the amplitude of the dynamic pressure wave resulting from breakdown in water gap | |
| Burkin et al. | Formation of a spall cavity in a dielectric during electrical explosion | |
| Duan et al. | Experiments and calculations of wave breaking and evolution of wave groups with high steepness |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |