A multi-capacitance parallel pulse type plasma excitation device

Abstract

The application provides a multi-capacitance parallel pulse type plasma excitation device, which comprises a high-voltage pulse power supply, a direct current power supply, a signal generator, an energy storage capacitor, an electronic switch, a diode, a protective resistor, an electrode matrix, an insulating plate, a circuit probe and a signal amplifier; the device can generate high-frequency and high-energy arc excitation without reducing single pulse excitation energy, and can control excitation intensity, excitation frequency, discharge power and working time, and has the advantages of fast response, low power consumption and high energy utilization rate; the application is not limited by discharge frequency, has stronger control ability, and has more flexible energy input, so that the application range of the plasma excitation device in the flow control technology field of wide-range aircrafts is greatly expanded.

Description

Technical Field

[0001] This invention relates to plasma generating devices, and more specifically to a pulsed plasma excitation device. Background Technology

[0002] The efficient and stable operation of wide-range aircraft relies heavily on efficient flow control, especially in off-design conditions. Applying effective flow control techniques is crucial for achieving stable transitions during wide-range flight and is widely recognized as a key technology in wide-range aircraft development. Plasma excitation, as an active flow control method, is becoming an effective means to improve flow separation, instability, shock wave drag, frictional drag, boundary layer control, shock wave control, and shock wave / boundary layer interference control in wide-range aircraft. Currently, circuit devices based on pulsed plasma excitation active control primarily rely on capacitors for energy input. Using a single capacitor and high energy supply, with a mutually restrictive relationship between excitation frequency and energy, plasma arc excitation only achieves stable control under low Reynolds number conditions during laminar transition and with shock / laminar boundary layer interference. This still falls short of meeting the flow control requirements of wide-range aircraft under all operating conditions, particularly under high Reynolds number conditions with shock wave turbulence and boundary layer interference, necessitating innovative technical solutions. Internationally, considerable research has been conducted on plasma excitation in the field of shock wave / boundary layer disturbance flow, but most studies are limited to low Reynolds number laminar disturbance or low turbulence disturbance. This is partly because the turbulent boundary layer is more resistant to disturbances under high Reynolds number conditions, and partly because there is a lack of effective high-energy, ultra-high-frequency control methods. However, most shock wave / turbulent boundary layer disturbance flows on the surface of aircraft are high Reynolds number turbulent disturbances, and the control of plasma excitation under high Reynolds number conditions has not yet been reported. Secondly, current pulsed arc plasma excitation cannot meet the needs of practical applications and must be improved. Previous circuits mainly used single capacitor energy storage, but the frequency of capacitor charging and discharging cannot keep up with the excitation frequency. Studies have shown that the time required for the capacitor to be fully charged again after one discharge (95% is approximately considered as a fully charged state) is on the order of milliseconds. The disadvantage of this discharge circuit device is that the energy of a single pulse discharge is limited by the frequency of capacitor charging and discharging, which causes it to decrease with the increase of excitation frequency. Relevant papers have explained this [1-2], making it difficult to produce a high-frequency, high-energy, and stable control effect under high Reynolds number conditions.

[0003] [1] Gan, T., & Wang, Q. . (2022). Manipulation of ramp-induced shock using an array of surface arc plasma actuators. International Journal of Heatand Fluid Flow, 93, 4, paragraph 2.

[0004] [2] Tian, ​​G., Yun, W., Zhengzhong, S., Di, J., Huimin, S., &Min, J. (2018). Shock wave boundary layer interaction controlled by surfacearc plasma actuators. Physics of Fluids, 30(5), 055107-8, paragraph 2.

[0005] Currently, traditional plasma actuators use single-capacitor energy storage in their discharge circuits. Due to the low air pressure under supersonic flow conditions, a high breakdown voltage is required. Therefore, the circuit is equipped with two power supplies: a pulse power supply to break down the air and generate a high-frequency pulse signal, and a DC power supply to continuously charge the capacitor, providing energy to the actuator and creating localized energy deposition. (Wang, L., Xia, ZX, Luo, ZB, & Chen, J. (2014). Three-electrode plasma synthetic jet actuator for high-speed flow control. Aiaa Journal, 52(4), 880 Figure 2.) However, this circuit design cannot meet the compatibility requirements of operating frequency and discharge energy. Furthermore, although the high-voltage pulse power supply also considers the design of parallel capacitors in its power supply design, its purpose is only to increase the excitation frequency, without timing control of capacitor charging and discharging, thus failing to achieve efficient excitation. Currently, there is no dedicated arc actuator circuit design for high-frequency, high-energy, and high-efficiency discharge.

[0006] In summary, current plasma exciter discharge circuit devices based on parallel single capacitors still suffer from prominent problems in supersonic flow control, such as incompatibility between excitation frequency and discharge energy, and low power supply energy utilization. Summary of the Invention

[0007] To overcome the problems of existing technologies, this invention discloses a device capable of generating high-frequency, high-energy plasma excitation. The basic idea is to add a signal generator and its control switching circuit to a capacitor bank. Based on the excitation frequency signal of the pulse power supply, the signal generator outputs a low level to complete the sequential discharge of the capacitors, thereby increasing the excitation frequency without reducing the energy of a single discharge. Using this device, the operating frequency of the exciter can be significantly increased while ensuring that the energy of a single discharge does not decay, thus meeting the control requirements of turbulent flow under supersonic / hypersonic and high Reynolds number conditions.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A multi-capacitor parallel pulsed plasma excitation device includes: a high-voltage pulse power supply, a DC power supply, a signal generator, an energy storage capacitor, an electronic switch, a diode, a protective resistor, an electrode matrix, an insulating plate, a circuit probe, and a signal amplifier. The positive terminal of the DC power supply is connected to the protective resistor. After passing through the protective resistor, one path passes through the electronic switch and the energy storage capacitor to the negative terminal of the DC power supply, and the other path connects to the positive terminal of the diode. The negative terminal of the diode then splits into two paths: one path passes through the next-stage electronic switch and the energy storage capacitor to the negative terminal of the DC power supply, and the other path connects to the positive terminal of the next-stage diode. This process is repeated n times. After passing through the last diode, the device splits into two paths: one path connects to the positive terminal of the high-voltage pulse power supply, and then to the negative terminal of the DC power supply; the other path connects to one end of the electrode matrix and the input terminal of the circuit probe. The other end of the electrode matrix is ​​grounded, and the grounding terminal of the circuit probe is also grounded. The output terminal of the circuit probe is connected to the input terminal of the signal amplifier. The signal generator outputs n control signals to the electronic switch.

[0010] Furthermore, there are n energy storage capacitors; there are n electronic switches, which can be transistors, MOSFETs, or IGBTs, as long as the control frequency is above 50kHz, the requirements can be met; the insulating plate is made of organic plastic or boron nitride ceramic, with internal openings, the diameter of which matches the electrode diameter; the number of electrodes in the electrode matrix is ​​determined by comprehensively considering the supersonic inflow conditions and the voltage setting of the high-voltage pulse power supply, the electrodes are inserted into the electrode mounting holes on the insulating plate, and the upper end is kept flush with the upper surface of the insulating plate, the circuit probe is a current sensor or voltage sensor; the electrode matrix is ​​installed on the openings of the insulating plate, and the electrodes are tungsten electrodes or copper electrodes that are resistant to arc erosion.

[0011] Furthermore, in the electrode matrix, the anode of the first row and first column electrode is connected to the output terminal of the last diode through the lower surface of the insulating plate. The cathode of the first row and first column electrode and the anode of the second row and first column electrode are connected by wires on the lower surface of the insulating plate, and so on. The cathode of the y-th row and first column electrode is grounded and connected to the negative terminal of the power supply through wires on the lower surface of the insulating plate. Similarly, the anode of the first row and second column electrode is connected to the output terminal of the last diode through the lower surface of the insulating plate. The cathode of the first row and second column electrode and the anode of the second row and second column electrode are connected by wires on the lower surface of the plate, and so on up to column x.

[0012] Furthermore, there are 24 energy storage capacitors and 24 electronic switches.

[0013] Furthermore, the electrode matrix has 4 columns and 4 rows, with a 4mm distance between the anode and cathode and a 10mm column spacing, consisting of 32 electrodes.

[0014] Furthermore, the insulating plate is made of organic plastic PMMA (polymethyl methacrylate), with a pore size of 4mm and a thickness of 20mm; the circuit probe is a Tektronix P6015A high-voltage probe.

[0015] Furthermore, the overall volume of the device is 0.5 cubic meters, and its weight is 40 kg. The high-voltage pulse power supply is a microsecond pulse power supply, model: KGD-NSPS3U30F2, voltage: 0~30kV, pulse frequency: 0~2kHz, rise time 1μs, pulse width 2μs, dimensions: 100mm*120mm*40mm (length*width*height), and weight 15kg. The DC power supply is a high-voltage DC power supply, voltage: 0~3kV, maximum power: 3kW, output voltage 3KV, and dimensions: 130mm*120mm*60mm. The energy storage capacitor has a withstand voltage of 5KV and a capacitance of 2μF. The protection resistor has a withstand voltage of 5KV and a resistance of 1000Ω. The electronic switch is an IGBT, model: M10GD120DLC. The signal generator is a Stanford DG535, outputting 24 signals. The electrodes on the electrode matrix are tungsten electrodes. The signal amplifier is a Tektronix TCPA300 amplifier.

[0016] The present invention also provides a method for multi-capacitor parallel pulsed plasma excitation, using the above-mentioned apparatus, comprising:

[0017] Step 1: Charging the energy storage capacitor, i.e., the signal generator sends a high level, turns on the electronic switch, and the DC power supply charges the energy storage capacitor through the protection resistor.

[0018] Step 2: First-stage capacitor discharge. After the energy storage capacitor is fully charged, the signal generator sends a low-level signal to turn off the electronic switch. The high-voltage pulse power supply provides a high-voltage pulse to break down the air between the electrode matrix, forming an arc discharge. Under the excitation of the high-voltage pulse power supply, an arc discharge will occur between the cathode and anode of the electrode matrix, generating an electron flow channel. At the same time, the high-voltage pulse power supply transmits the excitation frequency to the signal generator in the form of a signal. The signal generator then transmits a high-level signal to the first-stage electronic switch, turning it on. The first-stage energy storage capacitor instantly releases electrical energy into the electrode matrix, completing one discharge power injection. Meanwhile, the first-stage electronic switch is on, and the DC power supply continues to charge the energy storage capacitor until it is fully charged, after which the first-stage electronic switch is turned off.

[0019] Step 3: The second-stage capacitor discharges. The signal generator transmits a high-level signal to the second-stage electronic switch according to the excitation frequency of the high-voltage pulse power supply, causing it to turn on. The second-stage energy storage capacitor releases energy to the electrode matrix. The first-stage diode is used to prevent the current released by the second-stage energy storage capacitor from flowing backward. The DC power supply continuously charges the second-stage energy storage capacitor until it is fully charged, at which point the second-stage electronic switch is turned off.

[0020] Steps 4-n: Same as step 2 or step 3;

[0021] Step n+1: The nth stage capacitor discharges, meaning that the previous energy storage capacitors are already fully charged, so it enters step 1 again to discharge the first stage capacitor, forming a cycle.

[0022] Furthermore, the frequency of the high and low level signals output by the signal generator is matched with the pulse frequency of the high voltage pulse power supply.

[0023] Furthermore, n is 24.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. Compared with traditional arc excitation circuits, this device can generate high-frequency, high-energy arc excitation without reducing the single pulse excitation energy. It can also control the excitation intensity, excitation frequency, discharge power, and working time. Moreover, it has fast response, low power consumption, and high energy utilization.

[0026] 2. With a relatively simple structure, the power supply circuit only adds capacitors and electronic switches. It has the characteristics of small overall size and easy installation and disassembly. It is a high-frequency, high-energy, fast-response plasma excitation generation device.

[0027] 3. It is not limited by the discharge frequency, has stronger control capabilities, and is more flexible in controlling energy input, which greatly expands the application scope of plasma exciters in the field of wide-range aircraft flow control technology. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the hardware composition of the present invention;

[0029] Figure 2 This is a diagram of the electrode matrix and insulating plate structure in this invention;

[0030] Figure 3 This is a diagram illustrating the capacitor charging process in this invention.

[0031] Figure 4 This is a diagram illustrating the effect of the first pulse signal in this invention;

[0032] Figure 5 This is a diagram illustrating the effect of the second pulse signal in this invention.

[0033] Figure 6 This is a diagram illustrating the effect of the third pulse signal in this invention.

[0034] Explanation of reference numerals in the attached diagram: 1. High-voltage pulse power supply; 2. DC power supply; 3. Signal generator; 41-4n. Energy storage capacitor; 51-5n. Electronic switch; 61-6n. Diode; 7. Protective resistor; 81-8m. Electrode matrix; 9. Insulating plate; 10. Circuit probe; 11. Signal amplifier. Detailed Implementation

[0035] To make the objectives, technical methods, and advantages of the present invention clearer, the content of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figure 1As shown, a multi-capacitor parallel pulsed plasma excitation device includes: a high-voltage pulse power supply 1, a DC power supply 2, a signal generator 3, energy storage capacitors 41-4n, electronic switches 51-5n, diodes 61-6n, a protective resistor 7, an electrode matrix 81-8m, an insulating plate 9, circuit probes 10, and a signal amplifier 11. The positive terminal of the DC power supply 2 is connected to the protective resistor 7. After passing through the protective resistor 7, one path goes through the electronic switch 51 and the energy storage capacitor 41 before connecting to the negative terminal of the DC power supply 2. The other path is connected to the positive terminal of the diode 61, and then splits into two paths through the negative terminal of the diode 61. One path goes through the next-stage electronic switch 52 and the energy storage capacitor 42 before connecting to the DC power supply. The negative terminal is connected to the positive terminal of the next stage diode 62. After passing through the negative terminal of the next stage diode 62, it splits into two more paths. This process is repeated n times. After passing through the last diode 6n, it splits into two paths. One path is connected to the positive terminal of the high-voltage pulse power supply 1, and then to the negative terminal of the DC power supply 2. The other path is connected to one end of the electrode matrix 81-8m and the input terminal of the circuit probe 10. After passing through the other end of the electrode matrix 81-8m, it is grounded. The grounding terminal of the circuit probe 10 is grounded. The output terminal of the circuit probe 10 is connected to the input terminal of the signal amplifier 11. The signal generator 3 outputs n control signals to the electronic switches 51-5n. The overall volume of the device is 0.5 cubic meters and the weight is 40 kg.

[0037] High voltage pulse power supply 1 is a self-developed microsecond pulse power supply, model: KGD-NSPS3U30F2, voltage: 0~30kV, pulse frequency: 0~2kHz, rise time 1μs, pulse width 2μs, size: 100mm*120mm*40mm (length*width*height), weight 15kg.

[0038] DC power supply 2 is a high voltage DC power supply from Xi'an Furunde Company. Voltage: 0~3kV, maximum power: 3kW, output voltage 3KV, and size: 130mm*120mm*60mm.

[0039] There are n energy storage capacitors 41-4n, with a withstand voltage of 5KV and a capacitance value of 2μF;

[0040] The protection resistor 7 has a withstand voltage of 5KV and a resistance of 1000Ω.

[0041] There are n electronic switches 51-5n, which can be transistors, MOSFETs or IGBTs. Any model with a control frequency of 50kHz or higher can meet the requirements. In this embodiment, IGBT is selected, and the model is M10GD120DLC.

[0042] Signal generator 3 is a Stanford DG535, which outputs 24 signals. Alternatively, a commercially available signal generator can also be used.

[0043] The electrode matrix 81-8m is installed on the opening of the insulating plate 9. The electrodes are tungsten electrodes or copper electrodes that are resistant to arc erosion. Tungsten electrodes have better performance if used for a long time. Tungsten electrodes are selected in this embodiment.

[0044] The insulating plate 9 is made of organic plastic or boron nitride ceramic with good insulation properties and machinability. It has internal openings with the diameter of the openings matching the diameter of the electrodes. The hole layout can be along the longitudinal direction or along the flow direction, depending on the needs of supersonic flow control. In a specific embodiment of the present invention, the organic plastic PMMA (polymethyl methacrylate), also known as acrylic or plexiglass, is used. The hole diameter is 4 mm and the thickness is 20 mm.

[0045] The number of electrodes in the electrode matrix 81-8m is determined by considering both the ultrasonic flow conditions and the voltage setting of the high-voltage pulse power supply. The electrodes are inserted into the electrode mounting holes on the insulating plate 9, with their upper ends flush with the upper surface of the insulating plate 9. The anode of the first row, first column electrode is connected to the output terminal of the last diode 6n through the lower surface of the insulating plate 9. The cathode of the first row, first column electrode and the anode of the second row, first column electrode are connected by wires on the lower surface of the insulating plate 9, and so on. The cathode of the y-th row, first column electrode is grounded on the lower surface of the insulating plate 9 and connected to the negative terminal of the power supply; similarly, the anode of the first row, second column electrode is connected to the output terminal of the last diode 6n through the lower surface of the insulating plate 9, and the cathode of the first row, second column electrode and the anode of the second row, second column electrode are connected by wires on the lower surface of the insulating plate 9, and so on up to column x. In a specific embodiment of the invention, as shown... Figure 2 As shown, the electrode matrix 81-8m has 4 columns and 4 rows, with a distance of 4 mm between the anode and cathode and a column spacing of 10 mm, consisting of 32 electrodes.

[0046] Circuit probe 10 is a current sensor or a voltage sensor. A voltage sensor is more accurate. In this embodiment, a Tektronix P6015A high-voltage probe is selected.

[0047] Signal amplifier 11 is a Tektronix TCPA300 amplifier;

[0048] This invention is charged first during operation, such as... Figure 3 As shown, signal generator 3 emits a high level, turns on electronic switch 51-5n, and DC power supply 2 charges energy storage capacitor 41-4n simultaneously through protection resistor 7; a potential difference is formed between electrode matrix 81-8m, but this potential difference is insufficient to break down the air between electrode matrix 81-8m to form an electric arc.

[0049] Then the first-stage capacitor discharges, such as... Figure 4As shown, after the energy storage capacitor 41-4n is fully charged, the signal generator 3 sends a low level signal to close the electronic switch 51-5n. The high-voltage pulse power supply 1 provides a high-voltage pulse to break down the air between the electrode matrix 81-8m, forming an arc discharge. Under the excitation of the high-voltage pulse power supply 1, an arc discharge will occur between the cathode and anode of the electrode matrix 81-8m, generating an electron flow channel. At the same time, the high-voltage pulse power supply 1 transmits the excitation frequency to the signal generator 3 in the form of a signal. The signal generator 3 then transmits a high-level signal to the first-stage electronic switch 51, making it open. The first-stage energy storage capacitor 41 instantly releases electrical energy to the electrode matrix 81-8m, completing the power injection of one discharge. At the same time, the first-stage electronic switch 51 is open, and the DC power supply 2 continuously charges the first-stage energy storage capacitor 41 until it is fully charged, after which the first-stage electronic switch 51 is closed.

[0050] Next is the discharge of the second-stage capacitor, such as... Figure 5 As shown, the signal generator 3 transmits a high-level signal to the second-stage electronic switch 52 according to the excitation frequency of the high-voltage pulse power supply 1, causing it to open. The second-stage energy storage capacitor 42 releases energy to the electrode matrix 81-8m. The first-stage diode 61 is used to prevent the current released by the second-stage energy storage capacitor 42 from flowing backward. The DC power supply 2 continuously charges the second-stage energy storage capacitor 42 until it is fully charged, at which point the second-stage electronic switch 52 is turned off.

[0051] Next is the discharge of the third-stage capacitor, such as... Figure 6 As shown, the principle is the same as that of Level 1 and Level 2;

[0052] Finally, the nth stage capacitor discharges. By this time, the first stage energy storage capacitor 41 is already fully charged, so it enters the process of discharging again. Figure 4 The first-stage capacitor, as shown, discharges, forming a cycle;

[0053] The frequency of the high and low level signals output by signal generator 3 matches the pulse frequency of high-voltage pulse power supply 1, achieving the purpose of high-frequency discharge. Exciter 8 achieves high-energy discharge because it can receive the energy released by the energy storage capacitor each time. As long as there are enough energy storage capacitors 41-4n connected in parallel, the high-voltage pulse power supply 1 will not affect the discharge power and energy of each discharge, regardless of the excitation frequency.

[0054] The present invention has the following beneficial effects:

[0055] 1. Compared with traditional arc excitation circuits, this device can generate high-frequency, high-energy arc excitation without reducing the single pulse excitation energy. It can also control the excitation intensity, excitation frequency, discharge power, and working time. Moreover, it has fast response, low power consumption, and high energy utilization.

[0056] 2. With a relatively simple structure, the power supply circuit only adds capacitors and electronic switches. It has the characteristics of small overall size and easy installation and disassembly. It is a high-frequency, high-energy, fast-response plasma excitation generation device.

[0057] 3. Plasma excitation is not limited by the discharge frequency, has stronger control capabilities, and allows for more flexible control of energy input, greatly expanding the application scope of plasma exciters in the field of wide-range aircraft flow control technology.

Claims

1. A multi-capacitance shunt pulsed plasma excitation device comprising: The utility model provides a high voltage pulse power supply (1), direct current power supply (2), signal generator (3), energy storage capacitor (41-4n), electronic switch (51-5n), diode (61-6n), protection resistance (7), electrode matrix (81-8m), insulating plate (9), circuit probe (10) and signal amplifier (11), its characterized in be: direct current power supply (2) positive pole connects protection resistance (7), after protection resistance (7), one way passes through first stage electronic switch (51) and first stage energy storage capacitor (41) and connects direct current power supply (2) negative pole, one way connects first stage diode (61) positive pole, through first stage diode (61) negative pole and divide into two ways again, one way passes through next stage electronic switch (52) and energy storage capacitor (42) and connects direct current power supply (2) negative pole, another way connects next stage diode (62) positive pole, through next stage diode (62) negative pole and divide into two ways again, repeat n ways like this, after last way diode (6n), divide into two ways, one way connects high voltage pulse power supply (1) positive pole, through high voltage pulse power supply (1) negative pole and connects direct current power supply (2) negative pole, another way connects electrode matrix (81-8m) one end and circuit probe (10) input end, through electrode matrix (81-8m) other end and ground, circuit probe (10) ground end ground, circuit probe (10) output end connects signal amplifier (11) input end, signal generator (3) output n way control signal to electronic switch (51-5n); The specific use steps are: Step 1: energy storage capacitor charging, that is, the signal generator sends a high level, opens the electronic switch, and the direct current power supply charges the energy storage capacitor through the protection resistance; Step 2: first stage capacitor discharging, that is, after the energy storage capacitor is fully charged, the signal generator sends a low level, closes the electronic switch, and the high voltage pulse power supply provides a high voltage pulse for breaking down the air between the electrode matrix to form arc discharge; under the excitation of the high voltage pulse power supply, arc discharge occurs between the cathode and the anode of the electrode matrix, and an electron flow channel is generated; at the same time, the excitation frequency of the high voltage pulse power supply is transmitted to the signal generator in the form of a signal, and the signal generator transmits a high level signal to the first stage electronic switch to make it open; the first stage energy storage capacitor instantaneously releases electric energy to the electrode matrix to complete a power injection, and the first stage electronic switch is in an open state, and the direct current power supply continuously charges the energy storage capacitor until the first stage electronic switch is closed after the energy storage capacitor is fully charged; Step 3: second stage capacitor discharging, that is, the signal generator transmits a high level signal to the second stage electronic switch according to the excitation frequency of the high voltage pulse power supply to make it open; the second stage energy storage capacitor releases energy to the electrode matrix, and the first stage diode is used to prevent the current released by the second stage energy storage capacitor from flowing in reverse; the direct current power supply continuously charges the second stage energy storage capacitor until the second stage electronic switch is closed after the second stage energy storage capacitor is fully charged; Step 4-Step n: the same as Step 2 or Step 3; Step n+1: the n-level capacitor discharges, that is, the previous energy storage capacitor has been fully charged, so it enters step 1, the 1-level capacitor discharges, forming a cycle.

2. A multi-capacitance parallel pulsed plasma excitation device as claimed in claim 1, characterized in that: The energy storage capacitor (41-4n) has n; electronic switch (51-5n) has n, select the triode, MOS tube or IGBT, as long as the control frequency is above 50 kHz model can meet the requirements; Insulating plate (9) is made of organic plastic or boron nitride ceramic, internal opening, aperture and electrode diameter size matching; The number of electrodes in the electrode matrix (81-8m) is comprehensively considered according to the supersonic incoming flow conditions and the voltage set by the high-voltage pulse power supply, the electrode is inserted into the electrode mounting hole on the insulating plate (9), the upper end is flush with the upper surface of the insulating plate (9), and the circuit probe (10) is a current sensor or a voltage sensor; The electrode matrix (81-8m) is installed on the opening of the insulating plate (9), and the electrode adopts arc ablation resistant tungsten electrode or copper electrode.

3. A multi-capacitance parallel pulsed plasma excitation device as claimed in claim 2, characterized in that: The anode of the first column of the first row of the electrode matrix (81-8m) is connected to the output end of the last diode through the lower surface of the insulating plate (9), the cathode of the first column of the first row of the electrode and the anode of the first column of the second row of the electrode are connected by wire on the lower surface of the insulating plate (9), and so on, the cathode of the first column of the y row of the electrode is grounded by wire on the lower surface of the insulating plate (9) and connected with the negative electrode of the power supply; Similarly, the anode of the second column of the first row of the electrode is connected to the output end of the last diode through the lower surface of the insulating plate (9), the cathode of the second column of the first row of the electrode and the anode of the second column of the second row of the electrode are connected by wire on the lower surface of the plate, and so on to the x column.

4. A multi-capacitance parallel pulsed plasma excitation device as claimed in claim 2, wherein: The energy storage capacitor (41-4n) has 24, and the electronic switch (51-5n) has 24.

5. A multi-capacitance parallel pulsed plasma excitation device as claimed in claim 3, wherein: The electrode matrix (81-8m) has 4 columns and 4 rows, and the distance between the anode and the cathode of the electrode is 4 mm, and the column spacing is 10 mm, which is composed of 32 electrodes.

6. A multi-capacitance parallel pulsed plasma excitation device as claimed in claim 5, characterized in that: The insulating plate (9) is made of organic plastic PMMA polymethyl methacrylate, the aperture is 4 mm, and the thickness is 20 mm; The circuit probe (10) is a voltage sensor Tektronix P6015A high-voltage probe.

7. A multi-capacitance parallel pulsed plasma excitation device as claimed in claim 6, characterized in that: The volume of the device as a whole is 0.5 cubic meters, and the weight is 40 kg, the high-voltage pulse power supply (1) is a microsecond pulse power supply, model: KGD-NSPS3U30F2, voltage: 0~30kV, pulse frequency: 0~2kHz, rising edge 1μs, pulse width 2μs, volume: length width height 100mm*120mm*40mm, weight 15kg; the direct current power supply (2) selects a high-voltage direct current power supply, voltage: 0~3kV, maximum power: 3kW, output voltage 3KV, volume 130mm*120mm*60mm; the energy storage capacitor (41-4n) withstands 5KV, and the capacitance is 2μF; the protection resistor (7) withstands 5KV, and the resistance is 1000Ω; the electronic switch (51-5n) selects IGBT, model M10GD120DLC; the signal generator (3) is Stanford DG535, and 24-way signals are output; the upper electrode of the electrode matrix (81-8m) adopts a tungsten electrode; and the signal amplifier (11) is a Tektronix TCPA300 amplifier.

8. A multi-capacitance parallel pulse plasma excitation method using the device in any one of claims 1 to 7, comprising: Step 1: charging the energy storage capacitor, that is, the signal generator (3) sends a high level, the electronic switch (51-5n) is opened, and the direct current power supply (2) charges the energy storage capacitor (41-4n) through the protection resistor (7); Step 2: discharging the first-stage capacitor, after the energy storage capacitor (41-4n) is fully charged, the signal generator (3) sends a low level, the electronic switch (51-5n) is closed, the high-voltage pulse power supply (1) provides a high-voltage pulse for breaking down the air between the electrode matrix (81-8m) to form arc discharge, under the excitation of the high-voltage pulse power supply (1), arc discharge occurs between the cathode and the anode of the electrode matrix (81-8m), and an electron flow channel is generated; meanwhile, the high-voltage pulse power supply (1) transmits the excitation frequency to the signal generator (3) in the form of a signal, the signal generator (3) transmits a high-level signal to the first-stage electronic switch (51) again, so that the first-stage electronic switch (51) is in an open state, the first-stage energy storage capacitor (41) releases electric energy to the electrode matrix (81-8m) instantaneously, the power injection of one discharge is completed, and the electronic switch (51) is in an open state, so that the direct current power supply (2) continuously charges the energy storage capacitor (41) until the electronic switch (51) is closed after the energy storage capacitor (41) is fully charged; Step 3: discharging the second-stage capacitor, the signal generator (3) transmits a high-level signal to the second-stage electronic switch (52) according to the excitation frequency of the high-voltage pulse power supply (1), so that the second-stage electronic switch (52) is opened, the second-stage energy storage capacitor (42) releases energy to the electrode matrix (81-8m), and the first-stage diode (61) is used to prevent the current released by the second-stage energy storage capacitor (42) from flowing back; the direct current power supply (2) continuously charges the second-stage energy storage capacitor (42), and the electronic switch (52) is closed after the second-stage energy storage capacitor (42) is fully charged; ​ Step 4-Step n: same as step 2 or step 3; Step n+1: the n-th stage capacitor discharges, that is, the previous energy storage capacitor (41) has been fully charged at this time, and then enters step 1, the first stage capacitor discharges, forming a cycle.

9. A multi-capacitance parallel pulsed plasma excitation method as claimed in claim 8, characterized by: The frequency of the high and low level signals output by the signal generator (3) matches the pulse frequency of the high voltage pulse power supply (1).

10. A multi-capacitance parallel pulsed plasma excitation method as claimed in claim 9, characterized by: n is 24.

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