Rotary detonation engine with magnetohydrodynamic power generation function

Abstract

The invention discloses a rotary detonation engine with a magnetohydrodynamic power generation function, which comprises an oil injection disc, a plurality of pairs of collision holes formed in a throat part for injecting and mixing fuel and a power generation working medium; the magnetic field module provides a vertical magnetic field for the detonation combustion chamber; the detonation combustion chamber is used for detonating reactants and generating rotating detonation waves to compress the power generation working medium in the mixture so that the power generation working medium can be ionized into plasmas, and the plasmas rotate along the combustion chamber along with the rotating detonation waves to cut a magnetic field and generate induced electromotive force for power generation; insulation isolation sections are arranged at the two ends of the combustion chamber so that the conductivity of the detonation combustion chamber can be guaranteed. And the exhaust nozzle is used for discharging detonation products. When the rotary detonation engine works normally, a mechanical rotating part is not needed, the power generation working medium is ionized, the plasma is carried to rotate in a magnetic field for power generation, the energy loss rate is low, the power pulse width is large, the structure is simple, a novel magnetic fluid power generation mode is provided, and a new function is provided for the rotary detonation engine.

Description

Technical Field

[0001] The invention relates to engine technology, in particular to a rotary detonation engine with a magnetofluid power generation function. Background Art

[0002] At present, the mainstream magnetohydrodynamic power generation devices are mostly in pulse form, using the Faraday electromagnetic induction principle to convert magnetohydrodynamic energy into pulsed electric power. There are no mechanical moving parts, and no high-power power electronic conversion switches and energy storage components are required. Electric energy can be directly extracted. Based on the working characteristics of the rotating detonation engine, it can rely on the characteristics of high temperature and high pressure and rotating propagation of the rotating detonation wave, add power generation medium, and have the function of generating electricity while meeting the normal operation of the rotating detonation engine, thereby reducing the power supply device on the aircraft. At present, the development of rotating detonation engines in my country has been relatively mature, and the use of this rotating detonation engine with magnetohydrodynamic power generation function has important application value in the fields of national defense science and technology and industrial civilian use.

[0003] The rotary detonation engine with magnetohydrodynamic power generation function has a simple structure, low difficulty in improvement, and convenient application. The detonation wave is used to compress the power generation medium to a high temperature to ionize and generate plasma. According to Faraday's law of electromagnetic induction, when the plasma of the magnetohydrodynamic crosses the magnetic field, according to the law of electromagnetic induction, the positive and negative particles of the plasma are separated under the action of the magnetic field and gathered on two surfaces equal to the magnetic lines of force. Due to the accumulation of charges, an electric potential is generated; although there are many types of magnetohydrodynamic power generation devices in China and certain research results have been achieved, there is no experimental equipment for adding a power generation device on the basis of the rotary detonation engine. The pulse magnetohydrodynamic power generation form is mainly divided into explosion type and combustion type. The plasma is generated by the combustion of high-energy explosives or solid rocket propellants to generate electricity. The explosion type magnetohydrodynamic generator has a large power density but a small power pulse width, and the combustion type magnetohydrodynamic generator has a large power pulse width but a lower power density than the former. The present invention relies on the rotating detonation wave to drive the inert gas to generate magnetohydrodynamic power, and can obtain high power density and high power pulse width power generation performance. Summary of the invention

[0004] In order to increase the function of the rotating detonation engine, the present invention provides a rotating detonation engine with power generation function, which relies on the rotating detonation wave to compress the ionized power generation medium to generate plasma and perform magnetohydrodynamic power generation in the power generation channel.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A rotary detonation engine with magnetohydrodynamic power generation function, comprising:

[0007] The fuel injection plate is provided with a convergent section and a throat, and a plurality of pairs of collision holes are arranged at the throat for injection and mixing of fuel and power generation medium;

[0008] A magnetic field module provides a vertical magnetic field for the detonation combustion chamber;

[0009] The detonation combustion chamber is used to detonate the reactants, generate a rotating detonation wave to compress the power generation medium in the mixture to ionize it into plasma, and the plasma rotates along the combustion chamber with the rotating detonation wave to cut the magnetic field, generating an induced electromotive force to generate electricity;

[0010] Insulating isolation sections are provided at both ends of the combustion chamber to ensure the conductivity of the detonation combustion chamber;

[0011] Tail nozzle, used to discharge detonation products.

[0012] In a further embodiment, magnets are provided at both ends of the detonation combustion chamber, and an insulating isolation section is provided between the detonation combustion chamber and the magnets.

[0013] In a further embodiment, the fuel injection disc comprises an outer fuel injection disc 1 and an inner fuel injection disc; an oil inlet ring is provided on the fuel injection disc, and a plurality of pairs of collision holes are provided on the oil inlet ring.

[0014] In a further embodiment, the magnet located at the front end of the detonation combustion chamber is composed of a first magnet outer wall and a first magnet inner wall; the first magnet outer wall and the first magnet inner wall form an equal-section annular pipe to transport the power generation medium, preferably an annular magnet.

[0015] In a further embodiment, the insulating isolation section located at the front end of the detonation combustion chamber is composed of a first insulating isolation section outer ring and a first insulating isolation section inner ring, and the first insulating isolation section outer ring and the first insulating isolation section inner ring constitute an annular expansion conduit.

[0016] In a further embodiment, the inner and outer walls of the detonation combustion chamber are both conductive cylinders, serving as positive and negative electrodes of the power generation device.

[0017] In a further embodiment, the power generation is changed by controlling the number of rotating detonation wave heads, wave speed and rotation direction.

[0018] Compared with the prior art, the present invention has the following significant advantages:

[0019] (1) While the rotating detonation engine is working normally, no mechanical rotating parts are required. The working characteristics of the rotating detonation wave are used to ionize the generating medium and carry the plasma to rotate in the magnetic field to cut the magnetic flux lines to generate electricity. The energy loss rate is low, the power pulse width is large, and the structure is simple. It not only provides a new form of magnetohydrodynamic power generation, but also provides new functions for the rotating detonation engine. It can replace the power supply device on the aircraft and reduce the weight of the aircraft.

[0020] (2) The design uses insulating sections for assembly to ensure that there is no electrical conduction between the electrodes and other engine structures.

[0021] (3) The number of rotating detonation wave heads, wave speed and rotation direction will affect the power generation. The propagation characteristics of the detonation wave can be used to control the power generation. Conversely, the motion characteristics of the wave head can be controlled by controlling the voltage to achieve the purpose of thrust regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the subjective cross-sectional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the present invention.

[0024] Figure 3 This is a schematic diagram of the overall structure of the engine.

[0025] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the engine. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 4 As shown, a rotary detonation engine with magnetohydrodynamic power generation function of the present invention includes an outer fuel injection disc 1, an outer ring of an oil inlet ring 2, an outer wall of a first magnet 3, an outer wall of a second magnet 7, an outer ring of a first insulating isolation section 4, an outer ring of a second insulating isolation section 6, an outer wall of a detonation combustion chamber 5, an outer wall of a combustion chamber tail nozzle 8, an inner fuel injection disc 9, an inner ring of an oil inlet ring 10, an inner wall of a first magnet 11, an inner wall of a second magnet 15, an inner ring of a first insulating isolation section 12, an inner ring of a second insulating isolation section 14, an inner wall of a detonation combustion chamber 13, and an inner wall of a combustion chamber tail nozzle 16.

[0028] The outer fuel injection disc 1 and the inner fuel injection disc 9 constitute the convergence section and throat of the annular fuel injection disc. A plurality of pairs of collision holes are arranged on the disc to inject and mix the fuel and the power generation medium. The throat positions of the inner and outer fuel injection discs are provided with oil inlet rings (working medium inlet). The inner and outer oil inlet rings and the inner and outer fuel injection discs are assembled to constitute the supply device of the engine. The first magnet outer wall 3 and the first magnet inner wall 11 are located behind the supply device to form an annular pipeline with equal cross-section to transport the medium. The first isolation section composed of the first insulating isolation section outer ring 4 and the first insulating isolation section inner ring 12 is an annular expansion pipeline, which is arranged at the front end of the annular combustion chamber formed by the inner and outer walls of the detonation combustion chamber. The second isolation section composed of the second insulating isolation section outer ring 6 and the second insulating isolation section inner ring 14 is arranged at the rear end of the annular combustion chamber. The second magnet outer wall 7 and the second magnet inner wall 15 are located behind the second isolation section and are connected to the annular tail nozzle formed by the inner wall 16 of the combustion chamber tail nozzle and the outer wall 8 of the combustion chamber tail nozzle. The fuel and the generating medium enter the inner and outer injection plates from the inner and outer oil inlet rings respectively, are injected and mixed into the engine through the collision holes at the throat position, and enter the detonation combustion chamber through the magnet and insulation isolation. The magnets at both ends of the detonation combustion chamber provide them with a vertical magnetic field, and the unfired reactants are detonated through the pre-detonation tube 18 to generate a rotating detonation wave to compress the generating medium in the mixture and ionize it into plasma. The rotating detonation wave rotates along the combustion chamber to cut the magnetic field. Under the action of the magnetic field, the positive and negative charges move toward the inner and outer walls of the combustion chamber. The external load is connected to the current output port 17 by a wire to output electrical energy, and the detonation products are discharged from the combustion chamber along with the detonation wave.

[0029] The principle of magnetohydrodynamic power generation described in the present invention is to rely on the rotating detonation wave to compress the ionized generator, and the plasma rotates in the annular combustion chamber to cut the magnetic field to generate an induced electromotive force to generate electricity. The generator can be selected from inert gas, cesium, alkali metals, etc., but not limited to this. The power generation power can be changed by controlling the number of rotating detonation wave heads, wave speed and rotation direction. By controlling the voltage, the purpose of thrust regulation is achieved. The inner and outer walls of the detonation combustion chamber are both conductive cylinders, and the inner and outer walls serve as the positive and negative poles of the power generation device. The magnets are arranged on both sides of the combustion chamber to provide a vertical magnetic field for the generator. Insulating isolation sections are provided at both ends of the combustion chamber to ensure the conductivity of the conductive cylinder.

[0030] In the present invention, the inner and outer walls of the detonation combustion chamber are conductive cylinders, which are connected to the front and rear sections through flanges. In order to ensure its conductive performance, insulating isolation sections are provided at both ends of the detonation combustion chamber. Function: Free electrons and positive charges move toward the upper and lower walls under the action of the Lorentz force, and finally gather on the inner and outer walls of the conductive cylinder, generating an induced electromotive force. The conductive cylinder collects the collected charges and outputs electrical energy. The power generation working fluid can be selected from inert gas, cesium, alkali metal, etc. Under the promotion of high temperature and high pressure and alkali metal seeds, the inert gas is ionized into plasma, and works in the power generation channel to generate electricity along with the detonation wave.

[0031] In the present invention, magnets are arranged on both sides of the detonation combustion chamber, and their function is to provide a vertical magnetic field for the combustion chamber, so that the plasma ionized by the detonation wave compression-induced power generation medium can cut the magnetic flux lines with the rotation of the detonation wave to generate an induced electromotive force. The magnetic field strength can be increased by winding a coil and energizing it.

[0032] The present invention discloses a rotary detonation engine with magnetohydrodynamic power generation function, wherein magnets at both ends of a detonation combustion chamber and an insulating isolation section are sequentially connected and sealed to form a power generation channel, inner and outer oil spray plates and an oil inlet ring form a supply device for generator generator working fluid and fuel, the power generation channel is placed in a vertical magnetic field, the inner and outer walls of a conductive cylinder are parallel to the magnetic field as positive and negative poles of the power generation channel, a pre-detonation tube is at the entrance of the combustion chamber, unburned reactants are detonated, a detonation wave propagates along the combustion chamber, the working fluid in the ionized mixture is compressed and dissociated into plasma by the detonation wave, the positive and negative charges move toward the inner and outer walls of the combustion chamber under the action of the magnetic field, the charges gather on the conductive cylinder to generate an induced electromotive force, a load is connected to output electrical energy, and the detonation product is discharged from the combustion chamber along with the detonation wave.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A rotating detonation engine with magnetohydrodynamic power generation function, characterized in that: include: The fuel injection plate is provided with a convergent section and a throat, and a plurality of pairs of collision holes are arranged at the throat for injection and mixing of fuel and power generation medium; A magnetic field module provides a vertical magnetic field for the detonation combustion chamber; The detonation combustion chamber is used to detonate the reactants, generate a rotating detonation wave to compress the power generation medium in the mixture to ionize it into plasma, and the plasma rotates along the combustion chamber with the rotating detonation wave to cut the magnetic field, generating an induced electromotive force to generate electricity; Insulating isolation sections are provided at both ends of the combustion chamber to ensure the conductivity of the detonation combustion chamber; Tail nozzle, used to discharge detonation products.

2. The rotating detonation engine with magnetohydrodynamic power generation function according to claim 1, characterized in that: Magnets are arranged at both ends of the detonation combustion chamber, and an insulating isolation section is arranged between the detonation combustion chamber and the magnets.

3. The rotating detonation engine with magnetohydrodynamic power generation function according to claim 1, characterized in that: The oil spray plate comprises an outer oil spray plate 1 and an inner oil spray plate; an oil inlet ring is arranged on the oil spray plate, and a plurality of pairs of collision holes are arranged on the oil inlet ring.

4. The rotating detonation engine with magnetohydrodynamic power generation function according to claim 1, characterized in that: The magnet located at the front end of the detonation combustion chamber is composed of a first magnet outer wall and a first magnet inner wall; the first magnet outer wall and the first magnet inner wall form an equal-section annular pipeline for conveying power generation medium.

5. The rotating detonation engine with magnetohydrodynamic power generation function according to claim 2, characterized in that: The insulating isolation section located at the front end of the detonation combustion chamber is composed of a first insulating isolation section outer ring and a first insulating isolation section inner ring, and the first insulating isolation section outer ring and the first insulating isolation section inner ring form an annular expansion pipeline.

6. The rotating detonation engine with magnetohydrodynamic power generation function according to claim 1, characterized in that: The inner and outer walls of the detonation combustion chamber are both conductive cylinders, serving as the positive and negative electrodes of the power generation device.

7. The rotating detonation engine with magnetohydrodynamic power generation function according to claim 1, characterized in that: The power generation is changed by controlling the number of rotating detonation wave heads, wave speed and rotation direction.

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