CN103899437A - Weak knock method and device based on unbalanced plasma propelling gas - Google Patents
Weak knock method and device based on unbalanced plasma propelling gas Download PDFInfo
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- CN103899437A CN103899437A CN201410136840.0A CN201410136840A CN103899437A CN 103899437 A CN103899437 A CN 103899437A CN 201410136840 A CN201410136840 A CN 201410136840A CN 103899437 A CN103899437 A CN 103899437A
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Abstract
The invention discloses a weak knock method and device based on unbalanced plasma propelling gas. The device comprises a plasma contraction generating pipe, weak knock chamber and a magnetic fluid power generating chamber. The plasma contraction generating pipe is provided with a fuel gas and oxidant inlet and connected with the weak shock chamber. The weak shock chamber is connected with the magnetic fluid power generating chamber. The magnetic fluid power generating chamber supplies power for the plasma contraction generating pipe. The weak knock device has the advantages that weak knock inlet parameters are adjusted by utilizing the unbalanced plasma propelling gas, the outlet parameters of the unbalanced plasma propelling gas can be kept in a stable range when external parameters change, stable inlet parameters of weak knock are achieved, and stable and continuous weak knock can be achieved.
Description
Technical field
The present invention relates to a kind of stablize pinking method, especially a kind of low-order detonation method and device based on non-equilibrium plasma propellant gas.
Background technique
Burning is process very important in propulsion system and power generation system, and its chemical energy by fuel changes the heat energy of working medium into, then changes kinetic energy or electric energy into.At present, the combustion process of motor and generation technology is substantially according to the processing of isobaric combustion process, and the efficiency of cycle is lower, has seriously restricted the raising of motor and generation technology total efficiency.
Pinking refers to because ignition mixture is excited by high-energy, firing level with the form of detonation wave to combustion process that burning mixt is not propagated.Detonation wave can produce high gaseous-pressure and fuel gas temperature, and knocking combustion process approaches isochoric combustion process.In the time that external parameter has a less variation, the parameter of detonation wave there will be very large fluctuation, and therefore lasting pinking process is difficult to maintain stable.
At present, the device based on pinking process is mainly used in propulsion system, and such as pinking thruster, pinking pressed engine etc., its traditional motor of comparing has the higher efficiency of cycle.In addition, the concept of the magnetic fluid generating technology based on pinking process is also suggested, and because the combustion gas after pinking is high more a lot of than the enthalpy of neutral combustion, has high enthalpy to take the generating efficiency of the magnetic fluid generating technology of rate so be expected to significantly improve.These utilize the technology that continues detonation wave to run into difficulty stablizing aspect detonation wave, make its more difficult being generalized in practical application.Adopt the low-order detonation method based on non-equilibrium plasma propellant gas, can respond in the short period of time the variation of external parameter, 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 and device based on non-equilibrium plasma propellant gas, 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, produced non-equilibrium plasma jet;
2) the non-equilibrium plasma jet that step 1) obtains enters low-order detonation chamber and carries out the low-order detonation of continous-stable, and obtains the non-equilibrium plasma jet of the high enthalpy of high speed;
3) step 2) the high enthalpy non-equilibrium plasma of the high speed jet that produces enters magnetohydrodynamic generator chamber, to produce electromotive force, this electromotive force supplying step 1) in plasma convergent-divergent generator tube.
Preferably, 1.0～1.5 times of the chemical reaction equivalent proportions 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.Any one in hydrocarbon that described in described step 1), fuel gas is C1～C4, hydrogen, carbon monoxide, rock gas, petroleum gas, coal gas, oxygenant is air or oxygen.The argon gas or the helium that are easy to ionization in fuel gas, are also added.
Preferably, described step 2) use air or pure oxygen as oxygenant in low-order detonation process.
Preferably, described in described step 3), electromotive force 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 chamber and magnetohydrodynamic generator chamber, plasma convergent-divergent generator tube is provided with fuel gas and oxidant inlet, plasma convergent-divergent generator tube is connected with low-order detonation chamber, and low-order detonation chamber is connected with magnetohydrodynamic generator chamber.
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, going out port 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 chamber, can be pipe or square tube, and pipe can be volute or plain tube.
Preferably, in magnetohydrodynamic generator chamber, be provided with pair of electrodes, electric energy is transported to plasma convergent-divergent generator tube from two electrodes via wire, is also provided with switch in magnetohydrodynamic generator chamber.
Beneficial effect:. the present invention utilizes the promotion gas of non-equilibrium plasma to regulate low-order detonation suction parameter.In the time that external parameter changes, the outlet parameter of non-equilibrium plasma still can maintain in a stable scope, makes low-order detonation process have stable suction parameter, thereby can realize stable lasting low-order detonation.The promotion gas that the present invention utilizes non-equilibrium plasma to external world parameter changes and responds fast, and its response time is less than the time of fluidic response on the order of magnitude, thereby 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.Plasma contains a large amount of free groups, as O, H, OH etc., makes low-order detonation be easy to occur, and strengthening 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 embodiment's 1 applying plasma convergent-divergent generator tube;
Fig. 3 is the structural representation of magnetohydrodynamic generator chamber in embodiment 1;
Fig. 4 is the structural representation of embodiment's 2 applying plasma convergent-divergent generator tubes.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiments is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of various equivalents of the present invention.
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 1.0～1.5 times of chemical reaction equivalent proportions, mass flow rate is that to send into voltage be 1kV～20kV to the speed of 1kg/s, 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, hydrogen, carbon monoxide, rock gas, petroleum gas, coal gas of C1～C4, and oxygenant is air or oxygen.For improving conductivity, can in fuel, add the gas such as argon gas or helium that is easy to ionization of proper proportion.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 providing are all adjustable, therefore can change by changing voltage and frequency the working medium kinetic energy of the non-equilibrium plasma jet that plasma convergent-divergent generator tube sends, the needs of realizing low-order detonation to meet next step.
Second step, non-equilibrium plasma jet low-order detonation: the non-equilibrium plasma jet that the first step obtains enters low-order detonation chamber carries out the low-order detonation of continous-stable, obtaining temperature is 2300K～2800K, pressure 0.2MPa～0.6MPa, the high enthalpy that speed is 200m/s～400m/s, plasma jet at a high speed; In deflagration, use air as oxygenant, if use pure oxygen can obtain better detonation effect as oxygenant.Weak detonation chamber 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 that non-equilibrium plasma response external parameter changes is 10-4s～10-5s, and the time scale that fluidic response external parameter changes is at 10-2s～10-3s.Use the non-equilibrium plasma propellant gas response time that parameter changes to external world on the order of magnitude, to be less than the time of fluidic response, thereby make low-order detonation suction parameter keep stable.
The 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 the normal conductive magnet magnetic field that magnetic induction intensity is 0.2T～2.5T, produces 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, this electromotive force is drawn from two electrodes by wire, supplies with the electricity consumption of plasma convergent-divergent generator tube.Outlet temperature is 1800K～2200K, high temperature that pressure is 0.2MPa～0.4MPa, 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, after normal power generation, switches by switch, and field current is supplied by self generating.
A low-order detonation device based on non-equilibrium plasma propellant gas, by plasma convergent-divergent generator tube, low-order detonation chamber, magnetohydrodynamic generator chamber composition.Plasma convergent-divergent generator tube is connected with low-order detonation, and low-order detonation chamber is connected with magnetohydrodynamic generator chamber.Plasma convergent-divergent generator tube is provided with fuel gas import 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 ring electrode is connected with power supply, as shown in Figure 2.Low-order detonation chamber 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 chamber, and electric energy is transported to plasma convergent-divergent generator tube from two electrodes via wire.In magnetohydrodynamic generator chamber, be also provided with switch, as shown in Figure 4.
Embodiment 2: row's needle-like electrodes that the ingress that the electrode in plasma convergent-divergent generator tube is 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 (10)
1. the low-order detonation method based on non-equilibrium plasma propellant gas, is characterized in that, step is:
1) oxygenant and fuel gas are sent in plasma convergent-divergent generator tube, produced non-equilibrium plasma jet;
2) the non-equilibrium plasma jet that step 1) obtains enters low-order detonation chamber and carries out the low-order detonation of continous-stable, and obtains the non-equilibrium plasma jet of the high enthalpy of high speed;
3) step 2) the high enthalpy non-equilibrium plasma of the high speed jet that produces enters magnetohydrodynamic generator chamber, to produce electromotive force, this electromotive force supplying step 1) in plasma convergent-divergent generator tube.
2. the low-order detonation method based on non-equilibrium plasma propellant gas as claimed in claim 1, it is characterized in that, 1.0～1.5 times of the chemical reaction equivalent proportions of oxygenant and fuel gas in described step 1), 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. the low-order detonation method based on non-equilibrium plasma propellant gas as claimed in claim 1, it is characterized in that, any one in hydrocarbon that described in described step 1), fuel gas is C1～C4, hydrogen, carbon monoxide, rock gas, petroleum gas, coal gas, oxygenant is air or oxygen.
4. the low-order detonation method based on non-equilibrium plasma propellant gas as claimed in claim 3, is characterized in that, has also added the argon gas or the helium that are easy to ionization in fuel gas.
5. the low-order detonation method based on non-equilibrium plasma propellant gas as claimed in claim 1, is characterized in that described step 2) use air or pure oxygen as oxygenant in low-order detonation process.
6. the low-order detonation method based on non-equilibrium plasma propellant gas as claimed in claim 1, is characterized in that, electromotive force is connected to plasma convergent-divergent generator tube by switch described in described step 3).
7. the low-order detonation device based on non-equilibrium plasma propellant gas that low-order detonation method is made according to claim 1, it is characterized in that, comprise plasma convergent-divergent generator tube, low-order detonation chamber and magnetohydrodynamic generator chamber, plasma convergent-divergent generator tube is provided with fuel gas and oxidant inlet, plasma convergent-divergent generator tube is connected with low-order detonation chamber, low-order detonation chamber is connected with magnetohydrodynamic generator chamber, and magnetohydrodynamic generator chamber provides electric energy to plasma convergent-divergent generator tube.
8. the low-order detonation device based on non-equilibrium plasma propellant gas as claimed in claim 7, 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, going out port radius is 0.13～0.28m, the distribution of electrodes in plasma convergent-divergent generator tube near entrance and exit, and in have normal conductive magnet.
9. the low-order detonation device based on non-equilibrium plasma propellant gas as claimed in claim 7, is characterized in that, described low-order detonation chamber can be pipe or square tube, and pipe can be volute or plain tube.
10. the low-order detonation device based on non-equilibrium plasma propellant gas as claimed in claim 7, it is characterized in that, in magnetohydrodynamic generator chamber, be provided with pair of electrodes, electric energy is transported to plasma convergent-divergent generator tube from two electrodes via wire, is also provided with switch in magnetohydrodynamic generator chamber.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533582A (en) * | 2014-12-01 | 2015-04-22 | 浙江大学 | Automobile exhaust magnetohydrodynamic power generation device |
| CN104578682A (en) * | 2015-01-29 | 2015-04-29 | 东南大学 | Method for closed-loop magnetic fluid power generation by making use of latent heat of vaporization and cyclic power generation system |
| CN106065852A (en) * | 2015-06-09 | 2016-11-02 | 熵零股份有限公司 | A kind of electromotor |
| CN109502873A (en) * | 2018-11-16 | 2019-03-22 | 西北矿冶研究院 | Device and method for treating heavy metal ions in wastewater |
| CN109630312A (en) * | 2018-11-26 | 2019-04-16 | 中国航天空气动力技术研究院 | A kind of high frequency response vector spray |
| CN112555051A (en) * | 2020-12-04 | 2021-03-26 | 华中科技大学 | Scramjet engine based on lightning arc discharge ignition technology |
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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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| 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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533582A (en) * | 2014-12-01 | 2015-04-22 | 浙江大学 | Automobile exhaust magnetohydrodynamic power generation device |
| CN104533582B (en) * | 2014-12-01 | 2017-02-01 | 浙江大学 | Automobile exhaust magnetohydrodynamic power generation device |
| CN104578682A (en) * | 2015-01-29 | 2015-04-29 | 东南大学 | Method for closed-loop magnetic fluid power generation by making use of latent heat of vaporization and cyclic power generation system |
| CN106065852A (en) * | 2015-06-09 | 2016-11-02 | 熵零股份有限公司 | A kind of electromotor |
| CN109502873A (en) * | 2018-11-16 | 2019-03-22 | 西北矿冶研究院 | Device and method for treating heavy metal ions in wastewater |
| CN109630312A (en) * | 2018-11-26 | 2019-04-16 | 中国航天空气动力技术研究院 | A kind of high frequency response vector spray |
| CN112555051A (en) * | 2020-12-04 | 2021-03-26 | 华中科技大学 | Scramjet engine based on lightning arc discharge ignition technology |
| 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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