CN103899437B - A kind of low-order detonation method based on non-equilibrium plasma propellant gas and device - Google Patents
A kind of low-order detonation method based on non-equilibrium plasma propellant gas and device Download PDFInfo
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- CN103899437B CN103899437B CN201410136840.0A CN201410136840A CN103899437B CN 103899437 B CN103899437 B CN 103899437B CN 201410136840 A CN201410136840 A CN 201410136840A CN 103899437 B CN103899437 B CN 103899437B
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Abstract
The invention discloses a kind of low-order detonation method based on non-equilibrium plasma propellant gas and device, comprise plasma convergent-divergent generator tube, low-order detonation room and magnetohydrodynamic generator room, plasma convergent-divergent generator tube is provided with fuel gas and oxidant inlet, plasma convergent-divergent generator tube is connected with low-order detonation room, low-order detonation room is connected with magnetohydrodynamic generator room, and magnetohydrodynamic generator room provides electric energy to plasma convergent-divergent generator tube.The present invention utilizes the promotion gas of non-equilibrium plasma to regulate low-order detonation suction parameter.When external parameter changes time, the outlet parameter of non-equilibrium plasma still can maintain in a stable scope, makes low-order detonation process have stable suction parameter, thus can realize stable lasting low-order detonation.
Description
Technical field
The present invention relates to one and stablize pinking method, especially a kind of low-order detonation method based on non-equilibrium plasma propellant gas and device.
Background technique
Burning is process very important in propulsion system and power generation system, and the converts chemical energy of fuel is the heat energy of working medium by it, then changes kinetic energy or electric energy into.At present, the combustion process of motor and generation technology is substantially according to the process of isobaric combustion process, and the efficiency of cycle is lower, seriously constrains the raising of motor and generation technology total efficiency.
Pinking refer to due to ignition mixture excite by high-energy, the combustion process that firing level is propagated to non-burning mixt with the form of detonation wave.Detonation wave can produce high gaseous-pressure and fuel gas temperature, and knocking combustion process is close to isochoric combustion process.When external parameter has a less change, the parameter of detonation wave there will be very large fluctuation, and the pinking process difficult therefore continued remains stable.
At present, the device based on pinking process is mainly used in propulsion system, such as pinking thruster, pinking pressed engine etc., and its traditional motor of comparing has the higher efficiency of cycle.In addition, the concept based on the magnetic fluid generating technology of pinking process is also suggested, because the combustion gas after pinking is higher than the enthalpy of neutral combustion a lot, so be expected to significantly improve the generating efficiency having high enthalpy to take the magnetic fluid generating technology of rate.These utilize and continue the technology of detonation wave encounter difficulty in stable detonation wave, and it is more difficultly generalized in practical application.Adopt the low-order detonation method based on non-equilibrium plasma propellant gas, the change of external parameter can be responded in the short period of time, the intake condition of low-order detonation is regulated, obtain stable lasting low-order detonation.
Summary of the invention
Goal of the invention: the present invention proposes a kind of low-order detonation method based on non-equilibrium plasma propellant gas and device, realizes stable lasting low-order detonation.
Technological scheme: the technical solution used in the present invention is a kind of low-order detonation method based on non-equilibrium plasma propellant gas, and step is:
1) oxygenant and fuel gas are sent in plasma convergent-divergent generator tube, produce non-equilibrium plasma jet;
2) the non-equilibrium plasma jet that step 1) obtains enters the low-order detonation that continous-stable is carried out in low-order detonation room, and obtains the non-equilibrium plasma jet of the high enthalpy of high speed;
3) step 2) the high speed high enthalpy non-equilibrium plasma jet that produces enters magnetohydrodynamic generator room, to produce electromotive force, this electromotive force supplying step 1) in plasma convergent-divergent generator tube.
Preferably, the chemical reaction equivalent proportion 1.0 ~ 1.5 times of oxygenant and fuel gas in described step 1), mass flow rate is 1kg/s, and the voltage of plasma convergent-divergent generator tube is 1kV ~ 20kV, and frequency is 10kHz ~ 50kHz, and magnetic induction intensity is 0.2T ~ 2.5T.Fuel gas described in described step 1) is any one in the hydrocarbon of C1 ~ C4, hydrogen, carbon monoxide, rock gas, petroleum gas, coal gas, and oxygenant is air or oxygen.The argon gas or helium that are easy to ionize also is added in fuel gas.
Preferably, described step 2) use air or pure oxygen as oxygenant in low-order detonation process.
Preferably, electromotive force described in described step 3) is connected to plasma convergent-divergent generator tube by switch.
A kind of low-order detonation device based on non-equilibrium plasma propellant gas, comprise plasma convergent-divergent generator tube, low-order detonation room and magnetohydrodynamic generator room, plasma convergent-divergent generator tube is provided with fuel gas and oxidant inlet, plasma convergent-divergent generator tube is connected with low-order detonation room, and low-order detonation room is connected with magnetohydrodynamic generator room.
Preferably, the cross section of described plasma convergent-divergent generator tube is circular, its inlet radius is 0.25m ~ 0.50m, throat radius is 0.08m ~ 0.18m, exit radius is 0.13 ~ 0.28m, distribution of electrodes in plasma convergent-divergent generator tube near entrance and exit, and in have normal conductive magnet.
Preferably, described low-order detonation room can be pipe or square tube, and pipe can be volute or plain tube.
Preferably, in magnetohydrodynamic generator room, be provided with pair of electrodes, electric energy is transported to plasma convergent-divergent generator tube from two electrodes via wire, and magnetohydrodynamic generator is also provided with switch in room.
Beneficial effect:. the present invention utilizes the promotion gas of non-equilibrium plasma to regulate low-order detonation suction parameter.When external parameter changes time, the outlet parameter of non-equilibrium plasma still can maintain in a stable scope, makes low-order detonation process have stable suction parameter, thus can realize stable lasting low-order detonation.The present invention utilizes the promotion gas of non-equilibrium plasma to respond fast by Parameters variation to external world, and its response time is less than the time of fluidic response on the order of magnitude, thus makes low-order detonation suction parameter keep stable.The present invention utilizes the promotion gas of non-equilibrium plasma can strengthen low-order detonation combustion process.Containing a large amount of free groups in plasma, as O, H, OH etc., make low-order detonation be easy to occur, and strengthen low-order detonation process.The exit gas of apparatus of the present invention is the pressurized gas with flank speed, high enthalpy, and this gas can be sent in hydromagnetic generating device or pushing device and carry out follow-up acting, and output power is the highest can reach 120kW.
Accompanying drawing explanation
Fig. 1 is the structural representation of low-order detonation device in embodiment 1;
Fig. 2 is the structural representation of plasma convergent-divergent generator tube in embodiment 1;
Fig. 3 is the structural representation of magnetohydrodynamic generator room in embodiment 1;
Fig. 4 is the structural representation of plasma convergent-divergent generator tube in embodiment 2.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to various equivalents of the present invention has all fallen within the application's claims limited range.
Embodiment 1: a kind of low-order detonation method based on non-equilibrium plasma propellant gas, step is: the first step, produce non-equilibrium plasma jet at a high speed: by the oxygenant of normal temperature and pressure and fuel gas according to chemical reaction equivalent proportion 1.0 ~ 1.5 times, mass flow rate is the speed feeding voltage of 1kg/s is 1kV ~ 20kV, frequency is 10kHz ~ 50kHz, magnetic induction intensity is in the plasma convergent-divergent generator tube of 0.2T ~ 2.5T, generation conductivity is 10S/m ~ 20S/m, speed is 300m/s ~ 500m/s, temperature is 500K ~ 800K, pressure is the non-equilibrium plasma jet with magnetic fluid characteristic of 0.96atm ~ 0.98atm.Described fuel gas is any one in the hydrocarbon of C1 ~ C4, hydrogen, carbon monoxide, rock gas, petroleum gas, coal gas, and oxygenant is air or oxygen.For improving conductivity, the argon gas being easy to ionize or the gas such as helium of proper proportion can be added in fuel.The orthogonal thereto relation of electric field in plasma convergent-divergent generator tube and magnetic field.Voltage, the frequency of the above-mentioned plasma convergent-divergent generator tube provided are all adjustable, therefore the working medium kinetic energy of the non-equilibrium plasma jet that plasma convergent-divergent generator tube is sent can be changed by change voltage and frequency, to meet the needs that next step realizes low-order detonation.
Second step, non-equilibrium plasma jet low-order detonation: the non-equilibrium plasma jet that the first step obtains enters the low-order detonation that continous-stable is carried out in low-order detonation room, obtaining temperature is 2300K ~ 2800K, pressure 0.2MPa ~ 0.6MPa, speed is the high enthalpy of 200m/s ~ 400m/s, the plasma jet of high speed; Use air as oxygenant in deflagration, if use pure oxygen can obtain better detonation effect as oxygenant.Weak detonation room can be pipe or square tube, and pipe can be threaded pipe or plain tube, if use threaded pipe detonation effect by better.The time scale of non-equilibrium plasma response external parameter change is 10-4s ~ 10-5s, and the time scale of fluidic response external parameter change is at 10-2s ~ 10-3s.Use the response time of non-equilibrium plasma propellant gas Parameters variation to external world on the order of magnitude, be less than the time of fluidic response, thus make low-order detonation suction parameter keep stable.
3rd step, magnetohydrodynamic generator supply system electricity consumption: the high speed non-equilibrium plasma jet with high enthalpy that second step produces enters motion in normal conductive magnet magnetic field that magnetic induction intensity is 0.2T ~ 2.5T, generation electromotive force.In magnetohydrodynamic generator section, magnetic fluid cutting magnetic induction line at a high speed, with the direction of magnetic field orthotropic on produce electromotive force, the enthalpy of magnetic fluid is transformed into electric energy, and this electromotive force is drawn from two electrodes by wire, supplies the electricity consumption of plasma convergent-divergent generator tube.Outlet temperature is 1800K ~ 2200K, pressure be 0.2MPa ~ 0.4MPa high temperature, at a high speed, pressurized gas can send in hydromagnetic generating device or pushing device and carry out follow-up acting, output power is the highest can reach 120kW.The initial field current of plasma convergent-divergent generator tube is provided by ABAP Adapter, and after normal power generation, switched by switch, field current is supplied by self generating.
Based on a low-order detonation device for non-equilibrium plasma propellant gas, by plasma convergent-divergent generator tube, low-order detonation room, magnetohydrodynamic generator room forms.Plasma convergent-divergent generator tube is connected with low-order detonation, and low-order detonation room is connected with magnetohydrodynamic generator room.Plasma convergent-divergent generator tube is provided with fuel gas inlet 1 and oxidant inlet 2, as shown in Figure 1.
Distribution of electrodes in plasma convergent-divergent generator tube near entrance and exit, and in have normal conductive magnet, to produce the magnetic field orthogonal with electric field.Described electrode is the pair of parallel ring electrode that the entrance and exit place of plasma convergent-divergent generator tube is provided with, and parallel annular electrode is connected with power supply, as shown in Figure 2.Low-order detonation room can be pipe or square tube, and pipe can be volute or plain tube, if adopt volute effect better.Magnetohydrodynamic generator is provided with pair of electrodes in room, and electric energy is transported to plasma convergent-divergent generator tube from two electrodes via wire.Magnetohydrodynamic generator is also provided with switch in room, as shown in Figure 4.
Embodiment 2: the electrode in plasma convergent-divergent generator tube is row's needle-like electrodes that the ingress of plasma is provided with, and the ring electrode that outlet port is provided with, two electrodes are connected with power supply, as shown in Figure 3.
Other parts of the present embodiment are identical with embodiment 1.
Claims (9)
1. based on a low-order detonation method for non-equilibrium plasma propellant gas, it is characterized in that, step is:
1) oxygenant and fuel gas are sent in plasma convergent-divergent generator tube, produce non-equilibrium plasma jet;
2) step 1) the non-equilibrium plasma jet that obtains enters the low-order detonation that continous-stable is carried out in low-order detonation room, and obtains the non-equilibrium plasma jet of the high enthalpy of high speed;
3) step 2) the high speed high enthalpy non-equilibrium plasma jet that produces enters magnetohydrodynamic generator room, to produce electromotive force, this electromotive force supplying step 1) in plasma convergent-divergent generator tube.
2. as claimed in claim 1 based on the low-order detonation method of non-equilibrium plasma propellant gas, it is characterized in that, described step 1) in the chemical reaction equivalent proportion 1.0 ~ 1.5 times of oxygenant and fuel gas, mass flow rate is 1kg/s, the voltage of plasma convergent-divergent generator tube is 1kV ~ 20kV, frequency is 10kHz ~ 50kHz, and magnetic induction intensity is 0.2T ~ 2.5T.
3. as claimed in claim 1 based on the low-order detonation method of non-equilibrium plasma propellant gas, it is characterized in that, described step 1) described in fuel gas be any one in the hydrocarbon of C1 ~ C4, hydrogen, carbon monoxide, rock gas, petroleum gas, coal gas, oxygenant is air or oxygen.
4. as claimed in claim 3 based on the low-order detonation method of non-equilibrium plasma propellant gas, it is characterized in that, in fuel gas, also add the argon gas or helium that are easy to ionize.
5., as claimed in claim 1 based on the low-order detonation method of non-equilibrium plasma propellant gas, it is characterized in that, described step 2) use air or pure oxygen as oxygenant in low-order detonation process.
6., as claimed in claim 1 based on the low-order detonation method of non-equilibrium plasma propellant gas, it is characterized in that, described step 3) described electromotive force is connected to plasma convergent-divergent generator tube by switch.
7. the low-order detonation device based on non-equilibrium plasma propellant gas made of low-order detonation method according to claim 1, it is characterized in that, comprise plasma convergent-divergent generator tube, low-order detonation room and magnetohydrodynamic generator room, plasma convergent-divergent generator tube is provided with fuel gas and oxidant inlet, plasma convergent-divergent generator tube is connected with low-order detonation room, low-order detonation room is connected with magnetohydrodynamic generator room, and magnetohydrodynamic generator room provides electric energy to plasma convergent-divergent generator tube.
8. as claimed in claim 7 based on the low-order detonation device of non-equilibrium plasma propellant gas, it is characterized in that, the cross section of described plasma convergent-divergent generator tube is circular, its inlet radius is 0.25m ~ 0.50m, throat radius is 0.08m ~ 0.18m, exit radius is 0.13m ~ 0.28m, the distribution of electrodes in plasma convergent-divergent generator tube near entrance and exit, and in have normal conductive magnet.
9. as claimed in claim 7 based on the low-order detonation device of non-equilibrium plasma propellant gas, it is characterized in that, in magnetohydrodynamic generator room, be provided with pair of electrodes, electric energy is transported to plasma convergent-divergent generator tube from two electrodes via wire, and magnetohydrodynamic generator is also provided with switch in room.
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| CN104578682B (en) * | 2015-01-29 | 2016-09-21 | 东南大学 | A kind of available latent heat of vaporization closed-cycle magnetohydrodynamics power generation method and cycle generating system thereof |
| CN106065852A (en) * | 2015-06-09 | 2016-11-02 | 熵零股份有限公司 | A kind of electromotor |
| CN109502873B (en) * | 2018-11-16 | 2021-11-16 | 西北矿冶研究院 | Device and method for treating heavy metal ions in wastewater |
| CN109630312B (en) * | 2018-11-26 | 2021-02-09 | 中国航天空气动力技术研究院 | High-frequency response vectoring nozzle |
| CN112555051B (en) * | 2020-12-04 | 2021-11-02 | 华中科技大学 | Scramjet engine based on lightning arc discharge ignition technology |
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| JP2005315145A (en) * | 2004-04-01 | 2005-11-10 | Jfe Engineering Kk | Gas engine device |
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| CN102149247A (en) * | 2011-04-08 | 2011-08-10 | 东南大学 | Device and method for generating low-energy high-density plasma by multi-level ionization |
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Patent Citations (4)
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| US4703207A (en) * | 1985-07-25 | 1987-10-27 | Bodine Albert G | Alternating current magneto hydrodynamic generator |
| JP2005315145A (en) * | 2004-04-01 | 2005-11-10 | Jfe Engineering Kk | Gas engine device |
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