Fluidization device and rotary detonation engine

Abstract

The embodiments disclosed herein disclose a fluidization device and a rotary detonation engine, and relate to but are not limited to the rotary detonation engine technology. The fluidization device comprises a first container having a space for accommodating solid powder fuel, a second container having a space for accommodating solid powder oxidizer, a driving mechanism and a gas supply mechanism. Thus, when the solid powder fuel and the solid powder oxidizer are fluidized, the gas supply mechanism can control the feeding amount of the solid powder fuel and the solid powder oxidizer moving to the fluidization position by the driving mechanism, so as to control the usage amount of the solid powder fuel and the solid powder oxidizer. Meanwhile, by controlling the gas supply amount supplied to the first container and the second container by the gas supply mechanism, the fluidization gas amount entering the first container and the second container can also be controlled, so that by controlling the feeding speed of the driving mechanism and the gas supply amount supplied to the first container and the second container, different fluidization effects of the solid powder fuel and the solid powder oxidizer can be achieved to adapt to different fluidization processing requirements.

Description

Technical Field

[0001] This article relates to, but is not limited to, rotary detonation engine technology, particularly a fluidization device and a rotary detonation engine. Background Technology

[0002] Detonation combustion is achieved by compressing an explosive mixture with a leading shock wave, causing it to undergo a high-speed chemical reaction. Detonation combustion has advantages such as high heat release per unit time, self-pressurization, high combustion efficiency, and low pollutant emissions.

[0003] A rotating detonation engine (RDE) is a novel engine concept that generates thrust through continuous detonation combustion. The detonation wave propagates circumferentially along the engine, continuously igniting the fuel injected into the combustion chamber. RDEs offer significantly higher thermal cycle efficiency than traditional jet engines based on isobaric combustion, and also feature a faster heat release rate and simpler structure.

[0004] A rotating detonation combustor is an annular combustor that utilizes detonation combustion, with fuel supplied by multiple nozzles at the combustor head (upstream). For solid powder fuels, the fuel needs to be fluidized before entering the nozzles, and then enters the nozzles as a gas-solid two-phase flow. Existing fluidization devices maintain a constant feed rate for the solid powder fuel and a constant flow rate of fluidizing gas during fluidization, resulting in a limited range of fluidization effects and an inability to adapt to diverse fluidization requirements. Summary of the Invention

[0005] The main purpose of this paper is to provide a fluidization device and a rotary detonation engine, aiming to solve the technical problem of the limited fluidization effect of the fluidization device in the existing rotary detonation engine.

[0006] To achieve the above objectives, the embodiments of this paper propose a fluidization device, comprising:

[0007] A first container, the first container having space to contain solid powdered fuel;

[0008] A second container, the second container having space to contain a solid powder oxidant;

[0009] Drive mechanism; and

[0010] A gas supply mechanism is configured to control the feed rate of solid powder fuel and solid powder oxidant toward the fluidization position via the drive mechanism, and the gas supply mechanism is configured to control the gas supply to the first container and the second container to fluidize the solid powder fuel and solid powder oxidant.

[0011] In some embodiments of the fluidization apparatus, the driving mechanism includes a first piston and a second piston. The first piston is disposed on the first container and can form a first gas chamber with the first container. The second piston is disposed on the second container and can form a second gas chamber with the second container. The gas supply mechanism can supply gas to the first gas chamber and the second gas chamber simultaneously or separately, driving the first piston and the second piston to move, thereby controlling the feed amount of solid powder fuel and solid powder oxidant moving toward the fluidization position.

[0012] In some embodiments of the fluidization apparatus, the gas supply mechanism includes a gas storage unit, a first pipeline, and a second pipeline. The first pipeline connects the first gas chamber and the gas storage unit, and the second pipeline connects the second gas chamber and the gas storage unit. The gas storage unit can supply gas to the first pipeline and the second pipeline simultaneously or separately, driving the first piston and the second piston to move, thereby controlling the feed amount of solid powder fuel and solid powder oxidant moving towards the fluidization position.

[0013] In some embodiments of the fluidization apparatus, a first valve is provided on the first pipeline, and the first valve is configured to control the opening degree of the first pipeline;

[0014] A second valve is installed on the second pipeline, and the second valve is configured to control the opening degree of the second pipeline.

[0015] In some embodiments of the fluidizing apparatus, the fluidizing apparatus further includes a displacement sensor configured to monitor the displacement of the first piston and the second piston.

[0016] In some embodiments of the fluidization apparatus, the gas supply mechanism further includes a third pipeline and a fourth pipeline. The third pipeline connects the first container and the gas storage unit, and the fourth pipeline connects the second container and the gas storage unit. The gas storage unit can supply gas to the third pipeline and the fourth pipeline simultaneously or separately. A third valve is provided on the third pipeline, which is configured to control the opening degree of the third pipeline to control the amount of gas entering the first container. A fourth valve is provided on the fourth pipeline, which is configured to control the opening degree of the fourth pipeline to control the amount of gas entering the second container.

[0017] In some embodiments of the fluidization apparatus, the fluidization apparatus further includes a pressure sensor configured to monitor the internal pressure of the first container and the second container.

[0018] To achieve the above objectives, this embodiment also proposes a rotating detonation engine, comprising:

[0019] The fluidization apparatus as described above; and

[0020] A combustion chamber device, which is connected to the fluidization device, is configured to ignite the fluidized mixture of solid powder fuel and solid powder oxidizer to form a rotating detonation wave.

[0021] In some embodiments of the rotary detonation engine, a fifth valve is provided between the first container and the combustion chamber device, the fifth valve being configured to control the opening degree of the first container.

[0022] In some embodiments of the rotary detonation engine, a sixth valve is provided between the second container and the combustion chamber device, the sixth valve being configured to control the opening degree of the second container.

[0023] Implementing the embodiments described herein will have the following beneficial effects:

[0024] The fluidization device described above is used in a rotary detonation engine. Besides providing superior fluidization effects for solid powder fuel and solid powder oxidizer, it can also control the feed rate of the solid powder fuel and solid powder oxidizer, as well as the volume of fluidizing gas used in the fluidization process, to adapt to different fluidization requirements. Specifically, the fluidization device includes a first container with space for holding solid powder fuel, a second container with space for holding solid powder oxidizer, a drive mechanism, and a gas supply mechanism. During the fluidization of solid powder fuel and solid powder oxidizer, the gas supply mechanism can control the feed rate of the solid powder fuel and solid powder oxidizer towards the fluidization position via the drive mechanism, thereby controlling the amount of solid powder fuel and solid powder oxidizer used. Simultaneously, by controlling the gas supply to the first and second containers, the gas supply mechanism can also control the volume of fluidizing gas entering the first and second containers. Therefore, by controlling the feed rate of the drive mechanism and the gas supply to the first and second containers, different fluidization effects of the solid powder fuel and solid powder oxidizer can be achieved to meet different fluidization requirements.

[0025] Other features and advantages of this document will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this document. Other advantages of this document can be realized and obtained by means of the embodiments described in the description and the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings are used to provide an understanding of the technical solutions in this document and form part of the specification. They are used together with the embodiments in this document to explain the technical solutions in this document, but do not constitute a limitation on the technical solutions in this document.

[0027] Figure 1This is a schematic diagram of one embodiment of the rotary detonation engine described in this article;

[0028] Figure 2 This is a front view of the combustion chamber device in one embodiment of the rotary detonation engine described in this article;

[0029] Figure 3 This is a longitudinal sectional view of the combustion chamber device in one embodiment of the rotary detonation engine described in this article;

[0030] Figure 4 for Figure 3 Enlarged structural diagram of section A in the middle;

[0031] Figure 5 This is a cross-sectional view of the combustion chamber device in one embodiment of the rotary detonation engine described in this article;

[0032] Figure 6 This is a front view of the powder injection mechanism in another embodiment of the rotary detonation engine described in this article;

[0033] Figure 7 for Figure 6 Enlarged structural diagram of section B;

[0034] Figure 8 for Figure 6 C-axis sectional view;

[0035] Figure 9 for Figure 8 Enlarged structural diagram of section D in the middle;

[0036] Figure 10 This is a schematic diagram showing the connection between the initiation mechanism and the annular combustion chamber in one embodiment of the rotary detonation engine described in this paper.

[0037] The reference numerals in the attached figures are as follows:

[0038] 10. Fluidization device; 11. First container; 111. Fifth valve; 12. Second container; 121. Sixth valve; 13. Drive mechanism; 131. First piston; 132. Second piston; 14. Gas supply mechanism; 141. Gas storage unit; 142. First pipeline; 1421. First valve; 143. Second pipeline; 1431. Second valve; 144. Third pipeline; 1441. Third valve; 145. Fourth pipeline; 1451. Fourth valve; 20. Combustion chamber device; 21. Combustion chamber; 211. Circumferential wall; 212. Body; 22. Powder injection mechanism; 221. Shell; 222. Injection plate ; 223, Main body; 2231, Inner wall; 2232, Outer wall; 23, Initiation mechanism; 231, Pre-detonation tube; 232, Ignition unit; 233, Turbulence enhancement structure; 24, Nozzle; 241, Connecting pipe section; 242, Converging pipe section; 243, Diverging pipe section; 30, First displacement sensor; 40, Second displacement sensor; 50, First pressure sensor; 60, Second pressure sensor; 100, Annular combustion chamber; 200, Feed inlet; 300, Annular cavity; 301, Converging section; 302, Diverging section; 400, First nozzle; 500, Second nozzle; 600, Third nozzle; 700, Mixing channel.

[0039] The objectives, features, and advantages of this document will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this document clearer, the embodiments described below will be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined arbitrarily.

[0041] Detonation combustion is achieved by compressing an explosive mixture with a leading shock wave, causing it to undergo a high-speed chemical reaction. Detonation combustion has advantages such as high heat release per unit time, self-pressurization, high combustion efficiency, and low pollutant emissions.

[0042] A rotating detonation engine (RDE) is a novel engine concept that generates thrust through continuous detonation combustion. The detonation wave propagates circumferentially along the engine, continuously igniting the fuel injected into the combustion chamber. RDEs offer significantly higher thermal cycle efficiency than traditional jet engines based on isobaric combustion, and also feature a faster heat release rate and simpler structure.

[0043] A rotating detonation combustor is an annular combustor that utilizes detonation combustion, with fuel supplied by multiple nozzles at the combustor head (upstream). For solid powder fuels, the fuel needs to be fluidized before entering the nozzles, and then enters the nozzles as a gas-solid two-phase flow. Existing fluidization devices maintain a constant feed rate for the solid powder fuel and a constant flow rate of fluidizing gas during fluidization, resulting in a limited range of fluidization effects and an inability to adapt to diverse fluidization requirements.

[0044] To address the aforementioned technical problems, this embodiment provides a fluidization device and a rotary detonation engine.

[0045] like Figure 1 As shown, the rotary detonation engine provided herein will now be described. The rotary detonation engine includes a fluidization device 10 and a combustion chamber device 20. The fluidization device 10 is configured to fluidize solid powder fuel and solid powder oxidant. Solid powder fuel includes, but is not limited to, fossil fuels such as coal, metallic fuels, or biomass. The solid powder oxidant provides the necessary oxygen for the combustion of the solid powder fuel and includes, but is not limited to, ammonium perchlorate (AP), ammonium dinitrate (ADN), or hydrazine nitroformide (HNF).

[0046] The fluidization device 10 includes a first container 11, a second container 12, a drive mechanism 13, and a gas supply mechanism 14. The first container 11 has a space for containing solid powder fuel. The second container 12 has a space for containing solid powder oxidant. The gas supply mechanism 14 is configured to control the feed rate of the solid powder fuel and solid powder oxidant toward the fluidization position via the drive mechanism 13, and to control the gas supply rate to the first container 11 and the second container 12 to fluidize the solid powder fuel and solid powder oxidant. The fluidization position is located close to the combustion chamber device 20, allowing the solid powder fuel and solid powder oxidant to be fluidized before entering the combustion chamber device 20.

[0047] The combustion chamber device 20 is connected to the fluidization device 10 and is configured to ignite the fluidized mixture of solid powder fuel and solid powder oxidizer to form a rotating detonation wave.

[0048] In summary, implementing the embodiments described herein will have the following beneficial effects: The fluidization device 10 described above, when applied to a rotary detonation engine, not only enables the rotary detonation engine to achieve better fluidization of solid powder fuel and solid powder oxidizer, but also allows for control of the feed rate of the solid powder fuel and solid powder oxidizer and the volume of fluidizing gas used in the fluidization process, thus adapting to different fluidization requirements. Specifically, the fluidization device 10 includes a first container 11 with space for containing solid powder fuel, a second container 12 with space for containing solid powder oxidizer, a drive mechanism 13, and a gas supply mechanism 14. Thus, during the fluidization of solid powder fuel and solid powder oxidizer, the gas supply mechanism 14 can control the feed rate of the solid powder fuel and solid powder oxidizer towards the fluidization position through the drive mechanism 13, thereby controlling the amount of solid powder fuel and solid powder oxidizer used. Meanwhile, by controlling the gas supply to the first container 11 and the second container 12 through the gas supply mechanism 14, the amount of fluidizing gas entering the first container 11 and the second container 12 can also be controlled. Thus, by controlling the feed speed of the drive mechanism 13 and the amount of gas supplied to the first container 11 and the second container 12, different fluidization effects of solid powder fuel and solid powder oxidant can be achieved to adapt to different fluidization treatment requirements.

[0049] In one embodiment, please refer to... Figure 1 The driving mechanism 13 includes a first piston 131 and a second piston 132. The first piston 131 is disposed on the first container 11 and can form a first gas chamber with the first container 11. The second piston 132 is disposed on the second container 12 and can form a second gas chamber with the second container 12. The gas supply mechanism 14 can supply gas to the first gas chamber and the second gas chamber simultaneously or separately, driving the first piston 131 and the second piston 132 to move, thereby controlling the feed amount of solid powder fuel and solid powder oxidant moving towards the fluidization position. In this way, by driving the solid powder fuel with the first piston 131 and driving the solid powder oxidant with the second piston 132, the stability of the feed of solid powder fuel and solid powder oxidant can be ensured, and the solid powder fuel and solid powder oxidant can be fluidized in an orderly manner.

[0050] In one embodiment, please refer to... Figure 1The gas supply mechanism 14 includes a gas storage unit 141, a first pipeline 142, and a second pipeline 143. The first pipeline 142 connects the first gas chamber and the gas storage unit 141, and the second pipeline 143 connects the second gas chamber and the gas storage unit 141. The gas storage unit 141 can supply gas to the first pipeline 142 and the second pipeline 143 simultaneously or separately, driving the first piston 131 and the second piston 132 to move, thereby controlling the feed rate of solid powder fuel and solid powder oxidant towards the fluidization position. In this way, by controlling the gas supply to the first and second gas chambers respectively through the first pipeline 142 and the second pipeline 143, the feed rate of solid powder fuel and solid powder oxidant towards the fluidization position can be easily controlled.

[0051] In one embodiment, please refer to... Figure 1 A first valve 1421 is provided on the first pipeline 142. The first valve 1421 is configured to control the opening degree of the first pipeline 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.

[0052] A second valve 1431 is provided on the second pipeline 143. The second valve 1431 is configured to control the opening degree of the second pipeline 143 to control the amount of air entering the second air chamber. The second valve 1431 may be, but is not limited to, a mechanical valve or a solenoid valve.

[0053] In one embodiment, please refer to... Figure 1 The fluidization apparatus 10 also includes displacement sensors configured to monitor the displacement of the first piston 131 and the second piston 132. This allows for monitoring of the feed rates of the solid powder fuel and solid powder oxidant, and consequently, the amount of solid powder fuel and solid powder oxidant used for fluidization, thereby controlling the amount of solid powder fuel and solid powder oxidant used. The displacement sensors include a first displacement sensor 30 disposed on the first container 11 and capable of monitoring the displacement of the first piston 131, and a second displacement sensor 40 disposed on the second container 12 and capable of monitoring the displacement of the second piston 132.

[0054] In one embodiment, please refer to... Figure 1The gas supply mechanism 14 also includes a third pipe 144 and a fourth pipe 145. The third pipe 144 connects the first container 11 and the gas storage unit 141, and the fourth pipe 145 connects the second container 12 and the gas storage unit 141. The gas storage unit 141 can supply gas to the third pipe 144 and the fourth pipe 145 simultaneously or separately, so that the solid powder fuel and solid powder oxidant are fluidized before entering the combustion chamber device 20. In this way, the gas supply to the first container 11 and the second container 12 can be controlled by the first pipe 142 and the second pipe 143 respectively, which facilitates the control of parameters such as gas supply volume and gas supply timing, and facilitates the control of the amount of fluidized gas entering the first container 11 and the second container 12.

[0055] A third valve 1441 is provided on the third pipeline 144. The third valve 1441 is configured to control the opening degree of the third pipeline 144 to control the amount of air entering the first container 11. The third valve 1441 may be, but is not limited to, a mechanical valve or a solenoid valve.

[0056] A fourth valve 1451 is provided on the fourth pipeline 145. The fourth valve 1451 is configured to control the opening degree of the fourth pipeline 145 to control the amount of air entering the second container 12. The fourth valve 1451 may be, but is not limited to, a mechanical valve or a solenoid valve.

[0057] In one embodiment, please refer to... Figure 1 The fluidization apparatus 10 also includes pressure sensors configured to monitor the internal pressures of the first container 11 and the second container 12. This allows for control of the solid powder fuel and solid powder oxidant to achieve a preset fluidization effect by changing the internal pressures of the first container 11 and the second container 12. Simultaneously, monitoring the internal pressures of the first container 11 and the second container 12 also prevents excessive pressure from causing danger. The pressure sensors include a first pressure sensor 50 and a second pressure sensor 60. The first pressure sensor 50 is disposed on the first container 11 and monitors the internal pressure of the first container 11. The second pressure sensor 60 is disposed on the second container 12 and monitors the internal pressure of the second container 12.

[0058] In one embodiment, please refer to... Figure 1A fifth valve 111 is provided between the first container 11 and the combustion chamber device 20. The fifth valve 111 is configured to control the opening degree of the first container 11, thereby controlling the communication area between the first container 11 and the combustion chamber device 20. Thus, the fifth valve 111 can control the amount of solid powder fuel entering the combustion chamber device 20, allowing for more precise control of the solid powder fuel ratio. In the initial stage of the fluidization process, the first container 11 can be disconnected from the combustion chamber device 20 via the fifth valve 111. Once the solid powder fuel in the first container 11 reaches the fluidization requirements, the first container 11 can be reconnected to the combustion chamber device 20 via the fifth valve 111. The fifth valve 111 can be, but is not limited to, a mechanical valve or a solenoid valve.

[0059] In one embodiment, please refer to... Figure 1 A sixth valve 121 is provided between the second container 12 and the combustion chamber device 20. The sixth valve 121 is configured to control the opening degree of the second container 12, thereby controlling the communication area between the second container 12 and the combustion chamber device 20. Thus, the sixth valve 121 can control the amount of solid powder oxidant entering the combustion chamber device 20, allowing for more precise control of the solid powder oxidant ratio. In the initial stage of the fluidization process, the second container 12 can be disconnected from the combustion chamber device 20 via the sixth valve 121. Once the solid powder oxidant in the second container 12 reaches the fluidization requirements, the second container 12 can be reconnected to the combustion chamber device 20 via the sixth valve 121. The sixth valve 121 can be, but is not limited to, a mechanical valve or a solenoid valve.

[0060] In one embodiment, please combine Figures 2 to 5 The combustion chamber device 20 includes a combustion chamber 21, a powder injection mechanism 22, and an initiation mechanism 23. The combustion chamber 21 is provided with an annular combustion chamber 100. The powder injection mechanism 22 is disposed on the combustion chamber 21 and is configured to inject fluidized solid powder fuel and solid powder oxidizer into the annular combustion chamber 100.

[0061] The detonation mechanism 23 is installed in the combustion chamber 21 and is configured to ignite the mixture of solid powder fuel and solid powder oxidizer in the annular combustion chamber 100, thereby forming a rotating detonation wave within the annular combustion chamber 100. The detonation mechanism 23 generates a combustion gas flow (such as a detonation wave or a thermal jet) to ignite the mixture of solid powder fuel and solid powder oxidizer in the annular combustion chamber 100, forming a rotating detonation wave. The resulting high-temperature, high-pressure gas is then discharged from the annular combustion chamber 100.

[0062] In one embodiment, please combine Figure 2 , Figure 5 and Figure 10The detonation mechanism 23 is configured to input combustion airflow tangentially into the annular combustion chamber 100, so that the combustion airflow input by the detonation mechanism 23 can rotate circumferentially along the annular combustion chamber 100, reducing the impact of the combustion airflow on the combustion chamber 21, facilitating the propagation of the combustion airflow, and thereby improving the combustion efficiency of the combustion chamber 21. In this embodiment, the combustion airflow is a detonation wave.

[0063] In one embodiment, such as Figure 10 As shown, the detonation 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. The feed inlet 200 is configured to deliver fuel and oxidizer into the pre-detonation tube 231. The oxidizer can be air or oxygen. The fuel and oxidizer can be fed into the pre-detonation tube 231 separately, or they can be premixed before being fed into the pre-detonation tube 231. The fuel can be gaseous or liquid. The ignition unit 232 is connected to the pre-detonation tube 231 and is configured to ignite the mixture of fuel and oxidizer to generate a detonation wave within the pre-detonation tube 231. The ignition unit 232 can be located on the side wall of the pre-detonation tube 231 or at the end of the pre-detonation tube 231 away from the annular combustion chamber 100. The feed inlet 200 can be located on the side wall of the pre-detonation tube 231 or at the end of the pre-detonation tube 231 away from the annular combustion chamber 100.

[0064] In one embodiment, such as Figure 10 As shown, the detonation mechanism 23 also includes a turbulence enhancement structure 233, disposed within the pre-detonation tube 231. The turbulence enhancement structure 233 is configured to intensify combustion to enhance the transition process from combustion to detonation. Located within the pre-detonation tube 231, the turbulence enhancement structure 233 increases the turbulence of the combustion flame after the fuel and oxidizer are ignited, thereby intensifying combustion and enhancing the DDT (Deflagration to Detonation) process, resulting in a stable and self-sustaining detonation wave within the pre-detonation tube 231. The gas and detonation wave from the explosion in the pre-detonation tube 231 enter the annular combustion chamber 100, igniting the mixture of solid powder fuel and solid powder oxidizer within the annular combustion chamber 100. The turbulence enhancement structure 233 may include a helical spring, such as a Shchelkin spring (found by Shchelkin to significantly shorten the DDT process by placing a helical spring in the pre-detonation tube 231, later known as the Shchelkin spring), a barrier ring, and screens of different sizes.

[0065] In one embodiment, please combine Figures 3 to 5The powder injection mechanism 22 has an annular cavity 300 and a first nozzle 400. The annular cavity 300 is connected to the annular combustion chamber 100 and is configured to inject solid powder oxidant into the annular combustion chamber 100. The first nozzle 400 is connected to the annular cavity 300 and is configured to inject solid powder fuel into the annular combustion chamber 100. The injection direction of the annular cavity 300 and the injection direction of the first nozzle 400 can intersect within the annular combustion chamber 100, allowing the solid powder fuel injected into the annular combustion chamber 100 via the first nozzle 400 and the solid powder oxidant injected into the annular combustion chamber 100 via the annular cavity 300 to directly collide and premix. This results in a more uniform mixing of the solid powder fuel and solid powder oxidant entering the annular combustion chamber 100, achieving a preset mixing ratio and thus improving the performance of the rotary detonation engine.

[0066] In one embodiment, please combine Figure 3 and Figure 4 The annular cavity 300 and the annular combustion cavity 100 are coaxially arranged. The annular cavity 300 can integrate the mixture after the solid powder fuel and solid powder oxidant have collided and premixed. The coaxial arrangement of the annular cavity 300 and the annular combustion cavity 100 can facilitate the smooth entry of the integrated mixture into the annular combustion cavity 100.

[0067] In one embodiment, please combine Figure 3 and Figure 4 The annular cavity 300 includes a tapering section 301 and a expanding section 302 connected in sequence, with the expanding section 302 communicating with the annular combustion chamber 100. The tapering section 301 accelerates the movement of the solid powder oxidant into the annular combustion chamber 100, increasing the kinetic energy of the solid powder oxidant. This results in a smaller trajectory deviation after the solid powder oxidant collides with the solid powder fuel, and enables it to carry most of the solid powder fuel into the annular combustion chamber 100. The expanding section 302 facilitates the distribution of the mixture of solid powder oxidant and solid powder fuel throughout the annular combustion chamber 100, improving combustion reaction performance.

[0068] In one embodiment, such as Figure 4 As shown, the first nozzle 400 is connected to the diffuser section 302 and is connected to the annular combustion chamber 100 through the diffuser section 302, so that the mixture after the solid powder oxidant and solid powder fuel collide has a large diffusion space, which facilitates the mixture to fill the annular combustion chamber 100.

[0069] In one embodiment, please combine Figure 4 and Figure 5The powder injection mechanism 22 includes a housing 221 and an injection plate 222. The housing 221 forms an annular cavity 300. At least part of the inner circumferential side of the housing 221 is connected to the combustion chamber 21, and the outer circumferential side of the housing 221 is spaced apart from the combustion chamber 21. This ensures that when the solid powder oxidant passes through the annular cavity 300, especially through the annular cavity 300 with a tapering section 301 and a expanding section 302, the vibration of the housing caused by the solid powder oxidant impacting the housing 221 will not be directly transmitted to the outer wall of the combustion chamber 21. The housing 221 can buffer the vibration by moving relative to the combustion chamber 21, reducing the overall vibration of the combustion chamber device 20 and improving the stability of the combustion chamber device 20. The injection plate 222 is provided with a plurality of first nozzles 400, which are uniformly arranged along the circumference of the annular cavity 300. This ensures more thorough premixing of the solid powder fuel and solid powder oxidant, and a more uniform mixture of solid powder fuel and solid powder oxidant entering the annular combustion chamber 100. The injection disc 222 is mounted on the housing 221. The injection disc 222 can also be connected to the housing 221 and the combustion chamber 21 respectively to increase the stability of the position and structure of the injection disc 222.

[0070] In one embodiment, such as Figure 4 As shown, the combustion chamber 21 includes a circumferential wall 211 and a body 212. The circumferential wall 211 connects the body 212 and the housing 221. The circumferential wall 211 is located on the outer circumferential side of the annular combustion chamber 100, and its outer circumferential side is spaced apart from the body 212. This arrangement of the circumferential wall 211 allows it to receive vibrations from the housing 221 and, through its own movement relative to the body 212, further buffers these vibrations, reducing the overall vibration level of the combustion chamber device 20 and improving its operational stability. Simultaneously, the spaced-apart arrangement of the outer circumferential side of the circumferential wall 211 from the body 212 also reduces the circumferential transfer of combustion heat from the annular combustion chamber 100 to the combustion chamber device 20, maintaining the temperature of the high-temperature, high-pressure gas, thereby improving the performance of the rotary detonation engine.

[0071] In one embodiment, please combine Figure 2 and Figure 3 The combustion chamber device 20 also includes a nozzle 24, which comprises a connecting pipe section 241, a converging pipe section 242, and a diverging pipe section 243 connected in sequence. The connecting pipe section 241 is disposed on the combustion chamber 21 and communicates with the annular combustion chamber 100. Thus, the connecting pipe section 241 facilitates the connection of the nozzle 24 as a whole to the combustion chamber 21; the converging pipe section 242 accelerates the high-temperature, high-pressure gas, increasing propulsion; and the diverging pipe section 243 increases the effective area of ​​the high-temperature, high-pressure gas, also increasing propulsion.

[0072] In another embodiment, please combine Figures 6 to 9The powder injection mechanism 22 includes a body 223, on which a second nozzle 500, a third nozzle 600, and a mixing channel 700 are provided. The second nozzle 500 is configured to inject solid powder fuel into the mixing channel 700, and the third nozzle 600 is configured to inject solid powder oxidant into the mixing channel 700. The injection directions of the second nozzle 500 and the third nozzle 600 intersect within the mixing channel 700. The combustion chamber 21 is provided with an annular combustion chamber 100. The mixing channel 700 communicates with the annular combustion chamber 100. The powder injection mechanism 22 is connected between the fluidizing device 10 and the inlet of the annular combustion chamber 100, and can inject fluidized solid powder fuel and solid powder oxidant into the annular combustion chamber 100.

[0073] The injection directions of the second nozzle 500 and the third nozzle 600 can intersect within the mixing channel 700, allowing the solid powder fuel injected into the mixing channel 700 via the second nozzle 500 and the solid powder oxidant injected into the mixing channel 700 via the third nozzle 600 to directly collide and premix within the mixing channel 700. This results in a more uniform mixing of the solid powder fuel and solid powder oxidant entering the annular combustion chamber 100, achieving a preset mixing ratio and thus improving the performance of the rotary detonation engine.

[0074] like Figure 9 As shown, the angle between the injection direction of the second nozzle 500 and the injection direction of the third nozzle 600 is 45° to 75°. This angle range allows for a better collision angle between the solid powder fuel and the solid powder oxidant, resulting in a more uniform mixture and improved premixing effect. Simultaneously, within this angle range, the solid powder fuel and solid powder oxidant still maintain a good ability to move towards the annular combustion chamber 100, preventing obstruction of their movement due to collision. The diameter of the second nozzle 500 is 0.6 mm to 1.0 mm, and the diameter of the third nozzle 600 is 1.4 mm to 1.8 mm. In this embodiment, the angle α between the injection direction of the second nozzle 500 and the injection direction of the third nozzle 600 is 60°, the angle β between the injection direction of the second nozzle 500 and the extension direction of the mixing channel 700 is 45°, the angle γ between the injection direction of the third nozzle 600 and the extension direction of the mixing channel 700 is 15°, the diameter of the second nozzle 500 is 0.8 mm, and the diameter of the third nozzle 600 is 1.6 mm.

[0075] Please combine them together Figures 6 to 8, the mixed flow channel 700 is annular, and the mixed flow channel 700 is matched with the annular combustion chamber 100 and arranged coaxially. The mixed flow channel 700 and the annular combustion chamber 100 are connected in sequence, or the mixed flow channel 700 can also be located inside the annular combustion chamber 100 and serve as a part of the annular combustion chamber 100. At this time, the powder spraying mechanism 22 and the combustion chamber 21 can be an integral structure.

[0076] The body part 223 includes an inner wall 2231 and an outer wall 2232 that are oppositely arranged along the radial direction of the mixed flow channel 700. The inner wall 2231 and the outer wall 2232 enclose to form the mixed flow channel 700. The injection direction of the second nozzle 500 points to one of the inner wall 2231 and the outer wall 2232, and the injection direction of the third nozzle 600 points to the other of the inner wall 2231 and the outer wall 2232. In this way, after the solid powder fuel and the solid powder oxidizer collide, they can still collide with the inner wall 2231 and the outer wall 2232, further improving the premixing effect.

[0077] In one embodiment, please also combine Figure 6 Figure 7 The number of the second nozzles 500 is multiple, and the multiple second nozzles 500 are evenly arranged along the circumferential direction of the mixed flow channel 700. The number of the third nozzles 600 is the same as that of the second nozzles 500 and corresponds one by one. The corresponding second nozzles 500 and third nozzles 600 are arranged at intervals along the radial direction of the mixed flow channel 700. In this way, the mixture of the solid powder fuel and the solid powder oxidizer is more evenly distributed in each part of the annular combustion chamber 100, ensuring that the high-temperature and high-pressure gas generated after subsequent detonation can be discharged more evenly from the third nozzle 600, ensuring that the propulsion force of the rotating detonation engine is more stable and the direction of the propulsion force is more precise. In this embodiment, the second nozzles 500 and the third nozzles 600 are in groups of two, and there are 60 groups in total.

[0078] In the description herein, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "perimeter", "the structure of the character 'kou'", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this article and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this article.

[0079] In the description of the embodiments herein, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this document based on the specific circumstances.

[0080] While the embodiments disclosed herein are as described above, the content is merely for the purpose of understanding this document and is not intended to limit it. It should be noted that the above embodiments or implementations are merely exemplary and not restrictive. Therefore, this document is not limited to the specific content shown and described herein. Various modifications, substitutions, or omissions can be made to the form and details of the implementations without departing from the scope of this document.

Claims

1. A rotary detonation engine, characterized in that, include: A fluidization device and a combustion chamber device, wherein the combustion chamber device is connected to the fluidization device and is configured to ignite the fluidized mixture of solid powder fuel and solid powder oxidizer to form a rotating detonation wave; The fluidization device includes: A first container, the first container having space to contain solid powdered fuel; A second container, the second container having space to contain a solid powder oxidant; Drive mechanism; and A gas supply mechanism is configured to control the feed amount of solid powder fuel and solid powder oxidant toward the fluidization position via the drive mechanism, and the gas supply mechanism is configured to control the gas supply amount to the first container and the second container to fluidize the solid powder fuel and solid powder oxidant. The combustion chamber device includes a combustion chamber, a powder injection mechanism, and an initiation mechanism. The combustion chamber is provided with an annular combustion cavity, and the powder injection mechanism is disposed on the combustion chamber and configured to inject fluidized solid powder fuel and solid powder oxidizer into the annular combustion cavity. The detonation mechanism includes a pre-detonation tube, an ignition unit, and a turbulence enhancement structure, wherein the turbulence enhancement structure is disposed inside the pre-detonation tube; the detonation mechanism is configured to input combustion gas flow into the annular combustion chamber tangentially along the annular combustion chamber. The powder injection mechanism includes a main body, on which a second nozzle, a third nozzle, and a mixing channel are provided. The second nozzle is configured to inject solid powder fuel into the mixing channel, and the third nozzle is configured to inject solid powder oxidant into the mixing channel. The mixing channel is connected to the annular combustion chamber and is annular. The mixing channel has an inner wall and an outer wall arranged radially opposite to each other. The injection direction of the second nozzle points to one of the inner wall and the outer wall, and the injection direction of the third nozzle points to the other of the inner wall and the outer wall. The angle between the injection directions of the second nozzle and the third nozzle is 45° to 75°.

2. The rotary detonation engine as described in claim 1, characterized in that, The driving mechanism includes a first piston and a second piston. The first piston is disposed on the first container and can form a first air chamber with the first container. The second piston is disposed on the second container and can form a second air chamber with the second container. The gas supply mechanism can supply gas to the first air chamber and the second air chamber simultaneously or separately, driving the first piston and the second piston to move, so as to control the feed amount of solid powder fuel and solid powder oxidant moving to the fluidization position.

3. The rotary detonation engine as described in claim 2, characterized in that, The gas supply mechanism includes a gas storage unit, a first pipeline, and a second pipeline. The first pipeline connects the first gas chamber and the gas storage unit, and the second pipeline connects the second gas chamber and the gas storage unit. The gas storage unit can supply gas to the first pipeline and the second pipeline simultaneously or separately, driving the first piston and the second piston to move, thereby controlling the feed amount of solid powder fuel and solid powder oxidant moving towards the fluidization position.

4. The rotary detonation engine as described in claim 3, characterized in that, A first valve is installed on the first pipeline, and the first valve is configured to control the opening degree of the first pipeline; A second valve is installed on the second pipeline, and the second valve is configured to control the opening degree of the second pipeline.

5. The rotary detonation engine as described in claim 3 or 4, characterized in that, The fluidization device further includes a displacement sensor configured to monitor the displacement of the first piston and the second piston.

6. The rotary detonation engine as described in claim 3, characterized in that, The gas supply mechanism further includes a third pipeline and a fourth pipeline. The third pipeline connects the first container and the gas storage unit, and the fourth pipeline connects the second container and the gas storage unit. The gas storage unit can supply gas to the third pipeline and the fourth pipeline simultaneously or separately. A third valve is provided on the third pipeline, which is configured to control the opening degree of the third pipeline to control the amount of gas entering the first container. A fourth valve is provided on the fourth pipeline, which is configured to control the opening degree of the fourth pipeline to control the amount of gas entering the second container.

7. The rotary detonation engine as described in claim 1 or 6, characterized in that, The fluidization apparatus also includes a pressure sensor configured to monitor the internal pressure of the first container and the second container.

8. The rotary detonation engine as described in claim 1, characterized in that, A fifth valve is provided between the first container and the combustion chamber device, and the fifth valve is configured to control the opening degree of the first container.

9. The rotary detonation engine as described in claim 8, characterized in that, A sixth valve is provided between the second container and the combustion chamber device, and the sixth valve is configured to control the opening degree of the second container.

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