CN220453714U

CN220453714U - Fluidization device and rotary detonation engine

Info

Publication number: CN220453714U
Application number: CN202321832559.1U
Authority: CN
Inventors: 霍纪晖; 董琨; 史晓亮; 高宗永; 董天龙
Original assignee: Qinghang Aerospace Beijing Technology Co ltd
Current assignee: Qinghang Aerospace Beijing Technology Co ltd
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2024-02-06
Anticipated expiration: 2033-07-12

Abstract

Embodiments herein disclose a fluidization device and a rotary detonation engine, relating to, but not limited to, rotary detonation engine technology. The fluidization device includes a first container having a space for receiving a solid powder fuel, a second container having a space for receiving a solid powder oxidizer, a driving mechanism, and a gas supply mechanism. Thus, when the solid powder fuel and the solid powder oxidant are fluidized, the air supply mechanism can control the feeding amount of the solid powder fuel and the solid powder oxidant to the fluidization position through the driving mechanism so as to control the using amount of the solid powder fuel and the solid powder oxidant. Meanwhile, the air supply amount supplied to the first container and the second container is controlled through the air supply mechanism, and the fluidization air amount entering the first container and the second container can also be controlled, so that different fluidization effects of solid powder fuel and solid powder oxidant can be realized through controlling the feeding speed of the driving mechanism and the air supply amount supplied to the first container and the second container, and different fluidization treatment requirements can be met.

Description

Fluidization device and rotary detonation engine

Technical Field

The present disclosure relates to, but is not limited to, rotary detonation engine technology, and more particularly to a fluidization device and a rotary detonation engine.

Background

Detonation combustion is achieved by compressing an explosive mixture by a leading shock wave to cause a high-speed chemical reaction to occur; the detonation combustion has the advantages of high heat release intensity per unit time, self-pressurization, high combustion efficiency, low pollutant emission and the like.

A rotary detonation engine (Rotating Detonation Engine, RDE for short) is a new concept engine that utilizes continuous detonation combustion to generate thrust. The detonation wave propagates along the circumferential direction of the engine, continuously igniting the fuel injected into the combustion chamber. The RDE has much higher thermal cycle efficiency than conventional jet engines based on isobaric combustion, and has fast heat release rate and simple structure.

The rotary detonation combustor is an annular combustor utilizing a detonation combustion system, and fuel is supplied in common from a plurality of nozzles at the head (upstream) of the combustor. For solid pulverized fuel, the solid pulverized fuel needs to be fluidized by a fluidizing device before entering the nozzle, and enters the nozzle together in the form of a gas-solid two-phase flow. When the existing fluidization device is used for fluidization treatment, the feeding speed of the solid powder fuel and the fluidization air quantity provided for fluidization treatment are constant, so that the fluidization effect of the existing fluidization device is single, and different fluidization treatment requirements cannot be met.

Disclosure of Invention

The main purpose of this document is to provide a fluidization device and rotatory detonation engine, aims at solving the single technical problem of fluidization effect of fluidization device in current rotatory detonation engine.

To achieve the above object, embodiments herein provide a fluidization device, including:

a first container having a space for receiving a solid powdered fuel;

a second container having a space for holding a solid powder oxidizer;

a driving mechanism; and

And a gas supply mechanism configured to be able to control a feed amount of the solid pulverized fuel and the solid pulverized oxidant to the fluidization position by the driving mechanism, the gas supply mechanism being configured to be able to control a gas supply amount to be supplied to the first container and the second container to fluidize the solid pulverized fuel and the solid pulverized oxidant.

In some embodiments of the fluidization device, the driving mechanism includes a first piston and a second piston, the first piston is disposed on the first container and can enclose with the first container to form a first air cavity, the second piston is disposed on the second container and can enclose with the second container to form a second air cavity, and the air supply mechanism can supply air to the first air cavity and the second air cavity simultaneously or respectively, so as to drive the first piston and the second piston to move, so as to control the feeding amount of the solid powder fuel and the solid powder oxidant to move to the fluidization position.

In some embodiments of the fluidization device, the gas supply mechanism includes a gas storage unit, a first pipeline and a second pipeline, the first pipeline is communicated between the first gas cavity and the gas storage unit, the second pipeline is communicated between the second gas cavity and the gas storage unit, and the gas storage unit can supply gas to the first pipeline and the second pipeline simultaneously or respectively, so as to drive the first piston and the second piston to move, and control the feeding amount of the solid powder fuel and the solid powder oxidant to move to the fluidization position.

In some embodiments of the fluidization device, a first valve is provided on the first conduit, the first valve being arranged to control the opening of the first conduit;

the second pipeline is provided with a second valve, and the second valve is arranged to control the opening degree of the second pipeline.

In some embodiments of the fluidization device, the fluidization device further comprises a displacement sensor arranged to monitor the displacement of the first and second pistons.

In some embodiments of the fluidization device, the air supply mechanism further includes a third pipeline and a fourth pipeline, the third pipeline is communicated between the first container and the air storage unit, the fourth pipeline is communicated between the second container and the air storage unit, the air storage unit can supply air to the third pipeline and the fourth pipeline simultaneously or respectively, a third valve is arranged on the third pipeline, the third valve is arranged to control the opening degree of the third pipeline so as to control the air inflow into the first container, and a fourth valve is arranged on the fourth pipeline, and the fourth valve is arranged to control the opening degree of the fourth pipeline so as to control the air inflow into the second container.

In some embodiments of the fluidization device, the fluidization device further includes a pressure sensor configured to monitor the internal pressure of the first and second containers.

To achieve the above object, embodiments herein also provide a rotary knock engine including:

a fluidising apparatus as described above; and

And the combustion chamber device is communicated with the fluidization device and is arranged to detonate the mixture of the fluidized solid powder fuel and the solid powder oxidant to form a rotary detonation wave.

In some embodiments of the rotary detonation engine, a fifth valve is disposed between the first container and the combustion chamber device, the fifth valve being configured to control an opening of the first container.

In some embodiments of the rotary detonation engine, a sixth valve is disposed between the second container and the combustion chamber device, the sixth valve being configured to control the opening of the second container.

Implementation of the embodiments herein will have the following benefits:

the fluidization device of the scheme is applied to the rotary detonation engine, and besides the rotary detonation engine has better fluidization effect of the solid powder fuel and the solid powder oxidant, the fluidization device can control the feeding speed of the solid powder fuel and the solid powder oxidant and the fluidization air quantity for fluidization treatment so as to adapt to different fluidization treatment requirements. Specifically, the fluidization device includes a first container having a space for accommodating the solid powder fuel, a second container having a space for accommodating the solid powder oxidizer, a driving mechanism, and a gas supply mechanism. Thus, when the solid powder fuel and the solid powder oxidant are fluidized, the air supply mechanism can control the feeding amount of the solid powder fuel and the solid powder oxidant to the fluidization position through the driving mechanism so as to control the using amount of the solid powder fuel and the solid powder oxidant. Meanwhile, the air supply amount supplied to the first container and the second container is controlled through the air supply mechanism, and the fluidization air amount entering the first container and the second container can also be controlled, so that different fluidization effects of solid powder fuel and solid powder oxidant can be realized through controlling the feeding speed of the driving mechanism and the air supply amount supplied to the first container and the second container, and different fluidization treatment requirements can be met.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. Other advantages herein may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide an understanding of the technology herein, and are incorporated in and constitute a part of this specification, illustrate technology herein and, together with the description, serve to explain, without limitation, the technology herein.

FIG. 1 is a schematic diagram of an embodiment of a rotary knock engine herein;

FIG. 2 is a front view of a combustion chamber assembly in one embodiment of a rotary detonation engine herein;

FIG. 3 is a longitudinal cross-sectional view of a combustion chamber device in one embodiment of a rotary detonation engine herein;

FIG. 4 is an enlarged schematic view of the portion A in FIG. 3;

FIG. 5 is a transverse cross-sectional view of a combustion chamber device in one embodiment of a rotary detonation engine herein;

FIG. 6 is a front view of a powder injection mechanism in another embodiment of a rotary detonation engine herein;

FIG. 7 is an enlarged view of the portion B of FIG. 6;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 9 is an enlarged view of the portion D of FIG. 8;

FIG. 10 is a schematic illustration of an initiating mechanism in communication with an annular combustion chamber in one embodiment of a rotary detonation engine herein.

Wherein, the reference numerals are as follows:

10. a fluidization device; 11. a first container; 111. a fifth valve; 12. a second container; 121. a sixth valve; 13. a driving mechanism; 131. a first piston; 132. a second piston; 14. a gas supply mechanism; 141. a gas storage unit; 142. a first pipeline; 1421. a first valve; 143. a second pipeline; 1431. a second valve; 144. a third pipeline; 1441. a third valve; 145. a fourth pipeline; 1451. a fourth valve; 20. a combustion chamber device; 21. a combustion chamber; 211. a circumferential wall; 212. a body; 22. a powder spraying mechanism; 221. a housing; 222. a jet plate; 223. a body portion; 2231. an inner wall; 2232. an outer wall; 23. a detonation mechanism; 231. pre-bursting tube; 232. an ignition unit; 233. a turbulence enhancing structure; 24. a spray pipe; 241. connecting pipe sections; 242. a tapered tube section; 243. a divergent pipe section; 30. a first motion sensor; 40. a second displacement sensor; 50. a first pressure sensor; 60. a second pressure sensor; 100. an annular combustion chamber; 200. a feed inlet; 300. an annular cavity; 301. a tapered section; 302. a divergent section; 400. a first spout; 500. a second spout; 600. a third nozzle; 700. and a mixing runner.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

For the purposes, technical solutions and advantages of the present disclosure, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments and features of the embodiments herein may be arbitrarily combined with each other.

To solve the above technical problems, embodiments herein provide a fluidization device and a rotary detonation engine.

As shown in fig. 1, a rotary knock engine provided herein will now be described. The rotary detonation engine includes a fluidization device 10 and a combustion chamber device 20. Wherein the fluidization means 10 is arranged to be able to fluidize the solid powder fuel and the solid powder oxidant. Solid pulverized fuels include, but are not limited to, fossil fuels such as coal, metal fuels, or biomass, among others. The solid powder oxidizer is capable of providing the required oxygen for combustion of the solid powder fuel, including but not limited to Ammonium Perchlorate (AP), ammonium Dinitramide (ADN), or nitrohydrazinium nitrate (HNF), and the like.

The fluidization device 10 includes a first container 11, a second container 12, a driving mechanism 13, and a gas supply mechanism 14. Wherein the first container 11 has a space for receiving solid powder fuel. The second container 12 has a space for containing a solid powder oxidizer. The air supply mechanism 14 is provided so that the amount of feed of the solid pulverized fuel and the solid pulverized oxidant to the fluidization position can be controlled by the driving mechanism 13, and the air supply mechanism 14 is provided so that the amount of air supplied to the first container 11 and the second container 12 can be controlled to fluidize the solid pulverized fuel and the solid pulverized oxidant. The fluidization locations are located near the combustor apparatus 20 so that the solid pulverized fuel and the solid pulverized oxidant can be fluidized before entering the combustor apparatus 20.

The combustion chamber means 20 is in communication with the fluidising means 10 and is arranged to detonate the fluidised mixture of solid powdered fuel and solid powdered oxidant to form a rotary detonation wave.

To sum up, implementing the embodiments herein will have the following beneficial effects: the fluidization device 10 of the above scheme is applied to the rotary detonation engine, and besides the rotary detonation engine has better fluidization effect of the solid powder fuel and the solid powder oxidant, the fluidization device can control the feeding speed of the solid powder fuel and the solid powder oxidant and the fluidization air quantity for fluidization treatment so as to adapt to different fluidization treatment requirements. Specifically, the fluidization device 10 includes a first container 11 having a space for accommodating a solid powder fuel, a second container 12 having a space for accommodating a solid powder oxidizing agent, a driving mechanism 13, and a gas supply mechanism 14. Thus, when the solid pulverized fuel and the solid pulverized oxidant are fluidized, the air supply mechanism 14 can control the feeding amounts of the solid pulverized fuel and the solid pulverized oxidant to the fluidization position by the driving mechanism 13 to control the amounts of the solid pulverized fuel and the solid pulverized oxidant. Meanwhile, the air supply amount supplied to the first container 11 and the second container 12 is controlled by the air supply mechanism 14, and the amount of fluidization air entering the first container 11 and the second container 12 can also be controlled, so that different fluidization effects of the solid powder fuel and the solid powder oxidant can be realized by controlling the feeding speed of the driving mechanism 13 and the air supply amount supplied to the first container 11 and the second container 12 so as to adapt to different fluidization treatment requirements.

In one embodiment, referring to fig. 1, the driving mechanism 13 includes a first piston 131 and a second piston 132, where the first piston 131 is disposed on the first container 11 and can enclose the first container 11 to form a first air cavity, the second piston 132 is disposed on the second container 12 and can enclose the second container 12 to form a second air cavity, and the air supply mechanism 14 can supply air to the first air cavity and the second air cavity simultaneously or separately, and drive the first piston 131 and the second piston 132 to move so as to control the feeding amounts of the solid powder fuel and the solid powder oxidant to the fluidization position. Thus, the first piston 131 drives the solid powder fuel and the second piston 132 drives the solid powder oxidant, so that the feeding stability of the solid powder fuel and the solid powder oxidant can be ensured, and the solid powder fuel and the solid powder oxidant can be fluidized orderly.

In one embodiment, with continued reference to fig. 1, the air supply mechanism 14 includes a gas storage unit 141, a first pipeline 142 and a second pipeline 143, the first pipeline 142 is connected between the first air chamber and the gas storage unit 141, the second pipeline 143 is connected between the second air chamber and the gas storage unit 141, and the gas storage unit 141 can supply air to the first pipeline 142 and the second pipeline 143 simultaneously or respectively, so as to drive the first piston 131 and the second piston 132 to move, so as to control the feeding amount of the solid powder fuel and the solid powder oxidant to move to the fluidization position. In this way, the first air cavity and the second air cavity are respectively controlled to be supplied by the first pipeline 142 and the second pipeline 143, so that the feeding amount of the solid powder fuel and the solid powder oxidant to the fluidization position can be conveniently controlled.

In one embodiment, referring to FIG. 1, a first valve 1421 is disposed in the first conduit 142, and the first valve 1421 is configured to control the opening of the first conduit 142 to control the amount of air entering the first air chamber. The first valve 1421 may be, but is not limited to, a mechanical valve or a solenoid valve;

a second valve 1431 is provided on the second pipe 143, and the second valve 1431 is provided to control the opening degree of the second pipe 143 to control the amount of intake air into the second air chamber. The second valve 1431 may be, but is not limited to, a mechanical valve or a solenoid valve.

In one embodiment, referring still to FIG. 1, the fluidization device 10 further includes a displacement sensor configured to monitor the displacement of the first piston 131 and the second piston 132, such that the amount of feed of the solid pulverized fuel and the solid pulverized oxidant, and thus the amount of the solid pulverized fuel and the solid pulverized oxidant used for fluidization, can be monitored to control the amount of the solid pulverized fuel and the solid pulverized oxidant. The displacement sensor includes a first displacement sensor 30 provided on the first container 11 and capable of monitoring the displacement amount of the first piston 131, and a second displacement sensor 40 provided on the second container 12 and capable of monitoring the displacement amount of the second piston 132.

In one embodiment, with continued reference to fig. 1, the air supply mechanism 14 further includes a third conduit 144 and a fourth conduit 145, the third conduit 144 being in communication between the first container 11 and the air storage unit 141, the fourth conduit 145 being in communication between the second container 12 and the air storage unit 141, the air storage unit 141 being capable of simultaneously or separately supplying air to the third conduit 144 and the fourth conduit 145 to fluidize the solid pulverized fuel and the solid pulverized oxidant prior to entering the combustion chamber assembly 20. Thus, the first pipeline 142 and the second pipeline 143 are used for respectively controlling the air supply to the first container 11 and the second container 12, so that the parameters such as the air supply amount, the air supply time and the like can be conveniently controlled, and the fluidization air amount entering the first container 11 and the second container 12 can be conveniently controlled.

A third valve 1441 is provided on the third pipe 144, and the third valve 1441 is provided to control the opening of the third pipe 144 to control the amount of intake air into the first container 11. Third valve 1441 may be, but is not limited to, a mechanical valve or a solenoid valve.

A fourth valve 1451 is provided in the fourth line 145, the fourth valve 1451 being arranged to control the opening of the fourth line 145 to control the amount of intake air into the second container 12. The fourth valve 1451 may be, but is not limited to, a mechanical valve or a solenoid valve.

In one embodiment, referring still to FIG. 1, the fluidization device 10 also includes a pressure sensor configured to monitor the internal pressure of the first and second containers 11, 12 such that the internal pressure of the first and second containers 11, 12 can be varied to control the solid powder fuel and solid powder oxidizer to achieve a predetermined fluidization effect. At the same time, the internal pressure of the first container 11 and the second container 12 is monitored, and the risk of excessive pressure can be avoided. The pressure sensor includes a first pressure sensor 50 and a second pressure sensor 60. The first pressure sensor 50 is provided on the first container 11 and is capable of monitoring the pressure inside the first container 11. A second pressure sensor 60 is disposed on the second container 12 and is capable of monitoring the pressure inside the second container 12.

In one embodiment, with continued reference to fig. 1, a fifth valve 111 is disposed between the first container 11 and the combustion chamber device 20, and the fifth valve 111 is configured to control the opening of the first container 11 to control the communication area between the first container 11 and the combustion chamber device 20. The amount of solid pulverized fuel entering the combustion chamber means 20 can thus be controlled by the fifth valve 111 to more precisely control the proportion of solid pulverized fuel. In the initial stage of the fluidization process, the first container 11 may be disconnected from the combustion chamber device 20 by the fifth valve 111, and after the solid powder fuel in the first container 11 reaches the fluidization requirement, the first container 11 may be communicated with the combustion chamber device 20 by the fifth valve 111. The fifth valve 111 may be, but is not limited to, a mechanical valve or a solenoid valve.

In one embodiment, with continued reference to fig. 1, a sixth valve 121 is disposed between the second container 12 and the combustion chamber device 20, the sixth valve 121 being configured to control the opening of the second container 12 to control the communication area between the second container 12 and the combustion chamber device 20. The amount of solid powder oxidizer entering the combustion chamber device 20 can thus be controlled by the sixth valve 121 to more precisely control the proportion of solid powder oxidizer. In the initial stage of the fluidization process, the second container 12 may be disconnected from the combustion chamber device 20 by the sixth valve 121, and after the solid powder oxidizer in the second container 12 reaches the fluidization requirement, the second container 12 may be communicated with the combustion chamber device 20 by the sixth valve 121. The sixth valve 121 may be, but is not limited to, a mechanical valve or a solenoid valve.

In one embodiment, referring to fig. 2-5 together, the combustion chamber apparatus 20 includes a combustion chamber 21, a powder spraying mechanism 22, and an initiating mechanism 23. The combustion chamber 21 is provided with an annular combustion chamber 100. The powder spraying mechanism 22 is provided on the combustion chamber 21 and is configured to be able to spray the fluidized solid pulverized fuel and solid pulverized oxidant into the annular combustion chamber 100.

The initiating mechanism 23 is mounted to the combustion chamber 21 and is arranged to be capable of initiating a mixture of solid pulverized fuel and solid pulverized oxidant in the annular combustion chamber 100 such that a rotary detonation wave is formed within the annular combustion chamber 100. The initiating mechanism 23 enables the mixture of solid pulverized fuel and solid pulverized oxidant in the annular combustion chamber 100 to be detonated by generating a combustion gas stream (e.g., in the form of a detonation wave, thermal jet, etc.), forming a rotating detonation wave, from which the generated high temperature, high pressure gas can be exhausted from the annular combustion chamber 100.

In one embodiment, please combine fig. 2, 5 and 10, the initiating mechanism 23 is configured to input the combustion air flow into the annular combustion chamber 100 along the tangential direction of the annular combustion chamber 100, so as to facilitate the combustion air flow input by the initiating mechanism 23 to rotate along the circumferential direction of the annular combustion chamber 100, reduce the impact of the combustion air flow to the combustion chamber 21, facilitate the propagation of the combustion air flow, and thereby improve the combustion efficiency of the combustion chamber 21. In this embodiment, the combustion gas flow is a detonation wave.

In one embodiment, as shown in FIG. 10, the initiation mechanism 23 includes a pre-detonation tube 231 and an ignition unit 232. The pre-detonation tube 231 is provided with a feed inlet 200. Feed port 200 is configured to deliver fuel and oxidant into pre-detonation tube 231. The oxidant may be air or oxygen. The fuel and the oxidant may be supplied to the pre-explosion tube 231, respectively, or may be supplied to the pre-explosion tube 231 after being premixed. The fuel may be a gaseous fuel or a liquid fuel. An ignition unit 232 is connected to the pre-detonation tube 231 and is configured to ignite the mixture of fuel and oxidant to cause a detonation wave to form within the pre-detonation tube 231. The ignition unit 232 may be provided at a side wall of the pre-explosion tube 231 or at an end of the pre-explosion tube 231 remote from the annular combustion chamber 100. The feed port 200 may be provided on the side wall of the pre-explosion tube 231, or may be provided at an end of the pre-explosion tube 231 remote from the annular combustion chamber 100.

In one embodiment, as shown in FIG. 10, the initiation mechanism 23 further includes a turbulence enhancing structure 233 disposed within the pre-detonation tube 231, the turbulence enhancing structure 233 being configured to enhance combustion to enhance the transition from combustion to detonation. The turbulence enhancing structure 233 is located in the pre-explosion tube 231, and is used for increasing turbulence of combustion flame after the fuel and the oxidant in the pre-explosion tube 231 are ignited, so as to enhance the combustion and further enhance the DDT (Deflagration to detonation) process, thereby enabling stable and self-sustaining detonation waves to be generated in the pre-explosion tube 231. The gas and detonation wave after detonation in the pre-detonation tube 231 enters the annular combustion chamber 100 to detonate the mixture of solid pulverized fuel and solid pulverized oxidant in the annular combustion chamber 100. The turbulizer structure 233 may include a coil spring, such as a Shchelkin spring (it was found by Shchelkin that the provision of a coil spring in the pre-detonation tube 231 greatly shortens the DDT process, hereafter referred to as a Shchelkin spring), a baffle ring, screens of different sizes, and the like.

In one embodiment, referring to fig. 3-5 in combination, the duster mechanism 22 has an annular cavity 300 and a first nozzle 400. The annular cavity 300 is communicated with the annular combustion cavity 100, the annular cavity 300 is arranged to be capable of spraying solid powder oxidant into the annular combustion cavity 100, the first nozzle 400 is communicated with the annular cavity 300, the first nozzle 400 is arranged to be capable of spraying solid powder fuel into the annular combustion cavity 100, the spraying direction of the annular cavity 300 and the spraying direction of the first nozzle 400 can be intersected in the annular combustion cavity 100, so that the solid powder fuel sprayed into the annular combustion cavity 100 through the first nozzle 400 and the solid powder oxidant sprayed into the annular combustion cavity 100 through the annular cavity 300 can be directly collided for premixing, the solid powder fuel and the solid powder oxidant entering the annular combustion cavity 100 can be uniformly mixed, the mixing proportion can reach a preset value, and the performance of the rotary detonation engine is improved.

In one embodiment, referring to fig. 3 and fig. 4 together, the annular chamber 300 is coaxially disposed with the annular combustion chamber 100, the annular chamber 300 can integrate the mixture after the solid powder fuel and the solid powder oxidizer collide and are premixed, and the annular chamber 300 is coaxially disposed with the annular combustion chamber 100 to facilitate the integrated mixture to enter the annular combustion chamber 100 more smoothly.

In one embodiment, referring to fig. 3 and 4 together, the annular chamber 300 includes a tapered section 301 and a diverging section 302 connected in sequence, the diverging section 302 communicating with the annular combustion chamber 100. The tapered section 301 can accelerate the movement of the solid powder oxidant to the annular combustion chamber 100, so that the kinetic energy of the solid powder oxidant is improved, the movement track of the solid powder oxidant is less deviated after the solid powder oxidant collides with the solid powder fuel, and most of the solid powder fuel can be driven to move to the annular combustion chamber 100. The provision of the diverging section 302 can facilitate the mixture of the solid powder oxidizer and the solid powder fuel to be distributed over the annular combustion chamber 100, thereby improving the combustion reaction performance.

In one embodiment, as shown in fig. 4, the first nozzle 400 is connected to the diverging section 302 and is connected to the annular combustion chamber 100 through the diverging section 302, so that the mixture after the solid powder oxidizer collides with the solid powder fuel has a larger diffusion space, and the mixture is convenient to be distributed over the annular combustion chamber 100.

In one embodiment, referring to fig. 4 and 5 together, the powder spraying mechanism 22 includes a housing 221 and a spraying disc 222, the housing 221 encloses an annular cavity 300, at least a part of the inner circumferential side of the housing 221 is connected with the combustion chamber 21, and the outer circumferential side of the housing 221 is spaced from the combustion chamber 21, so that when the solid powder oxidizer passes through the annular cavity 300, especially the annular cavity 300 with a tapered section 301 and a diverging section 302, the housing vibration generated by the solid powder oxidizer due to the impact on the housing 221 is not directly transmitted to the outer wall of the combustion chamber 21, and the housing 221 can buffer the vibration by moving relative to the combustion chamber 21, so that the overall vibration degree of the combustion chamber device 20 is reduced, and the working stability of the combustion chamber device 20 is improved. The injection disk 222 is provided with a plurality of first nozzles 400, and the plurality of first nozzles 400 are uniformly arranged along the circumferential direction of the annular chamber 300, so that the premixing of the solid powder fuel and the solid powder oxidizer is more complete, and the mixture of the solid powder fuel and the solid powder oxidizer entering the annular combustion chamber 100 is more uniform. The injector plate 222 is disposed on the housing 221. The injector plate 222 may also be coupled to the housing 221 and the combustion chamber 21, respectively, to increase the stability of the position and configuration of the injector plate 222.

In one embodiment, as shown in fig. 4, the combustion chamber 21 includes a circumferential wall 211 and a body 212, the circumferential wall 211 is connected between the body 212 and the housing 221, the circumferential wall 211 is located at a circumferential outer side of the annular combustion chamber 100, and the circumferential outer side of the circumferential wall 211 is spaced apart from the body 212. In this way, the circumferential wall 211 is provided to receive the vibration from the casing 221, and the vibration is further buffered by the movement of the circumferential wall relative to the body 212, so that the overall vibration degree of the combustion chamber device 20 is reduced, and the stability of the operation of the combustion chamber device 20 is improved. Meanwhile, the circumferential outer side of the circumferential wall 211 is spaced from the body 212, so that the circumferential transfer of the combustion heat in the annular combustion chamber 100 to the combustion chamber device 20 can be reduced, and the temperature of the high-temperature and high-pressure gas can be maintained, thereby improving the performance of the rotary detonation engine.

In one embodiment, referring to fig. 2 and 3 in combination, the combustor assembly 20 further includes a nozzle 24, the nozzle 24 including a connecting tube segment 241, a converging tube segment 242, and a diverging tube segment 243 in sequential communication, the connecting tube segment 241 being disposed on the combustor 21 and in communication with the annular combustion chamber 100. So that the whole spray pipe 24 can be conveniently connected with the combustion chamber 21 through the connecting pipe section 241; the high-temperature high-pressure gas can be accelerated through the arrangement of the tapered pipe section 242, so that the propelling force is improved; the area of action of the high-temperature and high-pressure gas can be increased by providing the diverging pipe section 243, and the propulsive force can be also improved.

In another embodiment, referring to fig. 6 to 9 together, the powder spraying mechanism 22 includes a main body 223, and the main body 223 is provided with a second nozzle 500, a third nozzle 600 and a mixing flow channel 700, wherein the second nozzle 500 is configured to spray solid powder fuel into the mixing flow channel 700, the third nozzle 600 is configured to spray solid powder oxidant into the mixing flow channel 700, and the spraying direction of the second nozzle 500 and the spraying direction of the third nozzle 600 can intersect in the mixing flow channel 700. The combustion chamber 21 is provided with an annular combustion chamber 100. The mixing runner 700 communicates with the annular combustion chamber 100. The powder spraying mechanism 22 is communicated between the fluidization device 10 and the inlet of the annular combustion chamber 100, and is capable of spraying fluidized solid pulverized fuel and solid pulverized oxidant into the annular combustion chamber 100.

The injection direction of the second nozzle 500 and the injection direction of the third nozzle 600 can intersect in the mixing runner 700, so that the solid powder fuel injected into the mixing runner 700 through the second nozzle 500 and the solid powder oxidant injected into the mixing runner 700 through the third nozzle 600 can directly collide in the mixing runner 700 to be premixed, so that the solid powder fuel and the solid powder oxidant entering the annular combustion chamber 100 can be uniformly mixed, the mixing ratio can reach a preset value, and the performance of the rotary detonation engine is improved.

As shown in fig. 9, the included angle between the injection direction of the second nozzle 500 and the injection direction of the third nozzle 600 is 45 ° to 75 °, so that in the above angle range, a better collision angle can be provided between the solid powder fuel and the solid powder oxidant, so that the obtained mixture after collision is more uniform, and the premixing effect is further improved. Meanwhile, in the above-mentioned angle range, the solid powder fuel and the solid powder oxidizer still have better ability to move toward the annular combustion chamber 100, so that the solid powder fuel and the solid powder oxidizer are prevented from being blocked from moving toward the annular combustion chamber 100 due to collision. The diameter of the second nozzle 500 is 0.6mm to 1.0mm, and the diameter of the third nozzle 600 is 1.4mm to 1.8mm. In this embodiment, the included angle α between the injection direction of the second nozzle 500 and the injection direction of the third nozzle 600 is 60 °, the included angle β between the injection direction of the second nozzle 500 and the extending direction of the mixing flow channel 700 is 45 °, the included angle γ between the injection direction of the third nozzle 600 and the extending direction of the mixing flow channel 700 is 15 °, the diameter of the second nozzle 500 is 0.8mm, and the diameter of the third nozzle 600 is 1.6mm.

Referring to fig. 6 to 8, the mixing flow channel 700 is annular, and the mixing flow channel 700 is matched with the annular combustion chamber 100 and coaxially arranged. The mixing flow path 700 and the annular combustion chamber 100 are connected in sequence or the mixing flow path 700 may be located in the annular combustion chamber 100 as part of the annular combustion chamber 100, in which case the powder spraying mechanism 22 and the combustion chamber 21 may be of an integral structure.

The body portion 223 includes an inner wall 2231 and an outer wall 2232 disposed opposite to each other in a radial direction of the mixing flow path 700, the inner wall 2231 and the outer wall 2232 enclosing the mixing flow path 700, the injection direction of the second nozzle 500 being directed toward one of the inner wall 2231 and the outer wall 2232, and the injection direction of the third nozzle 600 being directed toward the other of the inner wall 2231 and the outer wall 2232. So that the solid powder fuel and the solid powder oxidizer can collide with the inner wall 2231 and the outer wall 2232 after collision, further improving the premixing effect.

In one embodiment, referring to fig. 6 and fig. 7, the number of the second nozzles 500 is plural, and the plurality of second nozzles 500 are uniformly arranged along the circumferential direction of the mixing flow channel 700, the number of the third nozzles 600 is consistent with and corresponds to the number of the second nozzles 500, and the corresponding second nozzles 500 and third nozzles 600 are arranged at intervals along the radial direction of the mixing flow channel 700. So that the mixture of the solid powder fuel and the solid powder oxidant is more uniformly distributed in each part of the annular combustion chamber 100, high-temperature and high-pressure gas generated after the subsequent detonation can be more uniformly discharged from the third nozzle 600, and the propelling force of the rotary detonation engine is more stable and the direction of the propelling force is more accurate. In this embodiment, the second nozzle 500 and the third nozzle 600 are disposed in a group of 60 groups.

In the description herein, it should be noted that the terms "upper", "lower", "one side", "another side", "one end", "another end", "side", "opposite", "four corners", "periphery", "mouth" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in description and simplicity of description, and do not indicate or imply that the structures referred to have a particular orientation, are configured and operated in a particular orientation, and are not to be construed as limitations herein.

In the description of the embodiments herein, unless explicitly stated and limited otherwise, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," "assembled" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, and may also be in communication between two elements. The specific meaning of the terms herein above will be understood to those of ordinary skill in the art in a specific context.

While the embodiments disclosed herein are described above, the descriptions are presented only to facilitate an understanding of the embodiments disclosed herein and are not intended to limit the scope of the present disclosure. It should be noted that the above-described examples or implementations are merely exemplary and not limiting. Accordingly, the disclosure is not limited to what has been particularly shown and described herein. Various modifications, substitutions, or omissions may be made in the form and details of the implementations without departing from the scope of the disclosure.

Claims

1. A fluidization device, comprising:

a first container having a space for receiving a solid powdered fuel;

a second container having a space for holding a solid powder oxidizer;

a driving mechanism; and

2. The fluidization device of claim 1, wherein the driving mechanism includes a first piston and a second piston, the first piston is disposed on the first container and is capable of enclosing with the first container to form a first air chamber, the second piston is disposed on the second container and is capable of enclosing with the second container to form a second air chamber, and the air supply mechanism is capable of supplying air to the first air chamber and the second air chamber simultaneously or separately, and driving the first piston and the second piston to move to control the feeding amounts of the solid powder fuel and the solid powder oxidizer to the fluidization position.

3. The fluidization device of claim 2, wherein the gas supply mechanism includes a gas storage unit, a first pipeline and a second pipeline, the first pipeline is communicated between the first gas chamber and the gas storage unit, the second pipeline is communicated between the second gas chamber and the gas storage unit, and the gas storage unit can supply gas to the first pipeline and the second pipeline simultaneously or respectively, so as to drive the first piston and the second piston to move, and control the feeding amount of the solid powder fuel and the solid powder oxidant to move to the fluidization position.

4. A fluidising apparatus as claimed in claim 3 in which a first valve is provided on the first conduit, the first valve being arranged to control the opening of the first conduit;

5. The fluidization device of claim 3 or 4, further comprising a displacement sensor configured to monitor the displacement of the first and second pistons.

6. The fluidization device as recited in claim 3, wherein the air supply mechanism further includes a third line and a fourth line, the third line being connected between the first container and the air storage unit, the fourth line being connected between the second container and the air storage unit, the air storage unit being capable of supplying air to the third line and the fourth line simultaneously or separately, the third line being provided with a third valve, the third valve being configured to control an opening degree of the third line to control an amount of air taken into the first container, the fourth line being provided with a fourth valve, the fourth valve being configured to control an opening degree of the fourth line to control an amount of air taken into the second container.

7. The fluidization device of claim 1 or 6, further comprising a pressure sensor configured to monitor the internal pressure of the first and second containers.

8. A rotary knock engine, comprising:

the fluidization device of any one of claims 1 to 7; and

9. The rotary detonation engine of claim 8, wherein a fifth valve is disposed between the first container and the combustion chamber device, the fifth valve being configured to control an opening of the first container.

10. A rotary detonation engine as claimed in claim 8 or 9, characterised in that a sixth valve is provided between said second container and said combustion chamber means, said sixth valve being arranged to control the opening of said second container.