Multiplexed liquid rocket flow channel structure

Abstract

The application discloses a multiplex liquid rocket guide groove structure, which comprises a guide main plate, side plates and a plurality of first cooling devices, the side plates are located on both sides of the guide main plate and are connected with the guide main plate to form a guide surface in cooperation with each other, wherein the adjacent first cooling devices are fixed on the surface of the guide surface and are fixedly connected with the side plates at both ends, each first cooling device is provided with a first water inlet and a first water inlet pipeline connected with the first water inlet on the side close to the guide surface, and a plurality of water spraying through holes are arranged on the surface of the side away from the guide surface, compared with the prior art, the guide groove structure can be quickly adjusted, the ablation of the high-temperature tail flame of the rocket engine to the guide surface is reduced, the cooling and noise reduction effects are achieved, the heat protection work of the guide groove is simplified, the cost is saved, and the subsequent test process is ensured to be smooth.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and in particular to a reusable liquid rocket guide channel structure. Background Technology

[0002] With the rapid development of the aerospace industry, various technologies involved in the rocket field have also made great strides.

[0003] During rocket launches and rocket engine tests, the high-temperature exhaust plume emitted by the engine can cause ablation of ground equipment. To prevent this, a flow guide structure needs to be installed on the ground. Current flow guide structures are made of reinforced concrete and covered with fire-retardant cement. However, prolonged exposure to high temperatures causes severe damage to the flow guide surface, reducing its lifespan. To safely guide the high-temperature exhaust plume, the fire-retardant cement needs to be reapplied, increasing manufacturing costs and affecting subsequent testing. Furthermore, the contact between the high-temperature exhaust plume and the flow guide structure surface generates significant noise, severely impacting the hearing of operators.

[0004] There is an urgent need to provide a reusable liquid rocket guide channel structure that can be quickly adapted to reduce the ablation of the guide surface by the high-temperature exhaust flame of the rocket engine, thereby achieving a cooling and noise reduction effect, simplifying the thermal protection of the guide channel, saving costs, and ensuring the smooth progress of subsequent tests. This is the problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a reusable liquid rocket guide channel structure that can be quickly adapted to reduce the ablation of the guide surface by the high-temperature exhaust flame of the rocket engine, thereby achieving a cooling and noise reduction effect, simplifying the heat protection work of the guide channel, saving costs, and ensuring the smooth progress of subsequent tests.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] One aspect of the present invention provides a reusable liquid rocket flow channel structure, comprising a flow guiding main plate, side plates, and a plurality of first cooling devices. The side plates are located on both sides of the flow guiding main plate and are interconnected with the flow guiding main plate to form a flow guiding surface.

[0008] The adjacent first cooling devices are fixedly and evenly laid on the surface of the guide surface and their two ends are fixedly connected to the side plate respectively. Each first cooling device has a first water inlet and a first water inlet pipe connected to the first water inlet on the side close to the guide surface, and multiple water spray holes are provided on the side surface away from the guide surface.

[0009] Furthermore, the surfaces of the plurality of first cooling devices away from the guide surface form curved guide planes, wherein the shape of the first cooling device is a cuboid structure with both ends connected and internal flow channels.

[0010] Furthermore, the shape of the water spray through-hole is a Laval nozzle structure.

[0011] Furthermore, the main flow guide plate and the side plate are welded and fixed. The side of the main flow guide plate away from the first cooling device is connected to the ground through a support I-beam. The side plate is provided with reinforcing ribs on the surface away from the main flow guide plate. The reinforcing ribs are welded and fixed to the side plate. The projection of the main flow guide plate onto the ground is rectangular, and the length direction of the short side is perpendicular to the side plate.

[0012] Furthermore, the side plate has an extension plate at the end near the ground, wherein the extension plate extends away from the first cooling device, the extension plate is welded to the side plate, and the extension plate is fixedly connected to the ground by locking bolts.

[0013] Furthermore, it also includes a second cooling device, which is located at the end of the side plate away from the ground and is tightly attached to and welded to the end faces of the main guide plate and the side plate respectively. The second cooling device includes a curved conduit with an internal flow channel and closed at both ends, and a first nozzle connected to the curved conduit.

[0014] Furthermore, the projection of the curved conduit on the ground is a U-shaped structure, and the curved conduit is provided with a second water inlet pipe and a second water inlet connected to the second water inlet pipe on the part of the main guide plate. The first nozzles are evenly distributed on the part of the curved conduit on the side plate, and the opening end of the first nozzles extends towards the other side of the side plate.

[0015] Furthermore, it also includes a third cooling device, which comprises a circular conduit with an internal flow channel and connected end to end, a third water inlet pipe, and multiple second nozzles. The circular conduit is located above the flow guide surface and is fixed by a support frame.

[0016] The outlet end of the third water inlet pipe is connected to the circular guide tube, the inlet end of the third water inlet pipe is connected to the second water inlet pipe, the second nozzles are evenly distributed inside the circular guide tube, and the inlet end of the second nozzle is connected to the circular guide tube, and the outlet end extends toward the center of the circle formed by the circular guide tube.

[0017] Furthermore, the support frame includes legs and a circular plate with a central hole that matches the circular guide tube. The legs are located at the lower part of the circular plate and are welded and fixed to the circular plate. The circular guide tube is located at the lower part of the circular plate and is fixed to the circular plate by a U-shaped clamp.

[0018] Furthermore, the diameter of the central hole is smaller than the diameter of the circle formed by the circular guide tube.

[0019] The present invention provides a reusable liquid rocket guide channel structure, which consists of a guide main plate, a side plate and a plurality of first cooling devices.

[0020] Since multiple cooling devices are laid on the surface of the guide surface, when the high-temperature flame burns the guide surface, liquid water is sprayed through multiple water spray holes of the cooling devices to cool the high-temperature flame, thereby further protecting the surface of the guide surface and mitigating the impact of the high-temperature airflow on the surface of the guide surface, thus playing a noise reduction role.

[0021] In addition, since the first cooling device is fixed and evenly laid on the surface of the guide surface, the liquid water sprayed from the multiple water spray holes is more uniform, which can make the surface of the guide surface cool evenly and ensure the stability of the guide surface structure.

[0022] Since the adjacent first cooling devices are fixedly and evenly laid on the surface of the guide surface and their two ends are fixedly connected to the side plate respectively, multiple first cooling devices can be firmly fixed, preventing deformation of the first cooling devices, while further ensuring that liquid water can be safely sprayed out from the water spray hole, thereby protecting the stability of the guide surface structure.

[0023] The entire reusable liquid rocket guide channel structure can be quickly adapted and adjusted to reduce the ablation of the guide surface by the high-temperature exhaust flame of the rocket engine, ensure the safety and stability of the guide channel structure under high-temperature conditions, achieve the effect of cooling and noise reduction, simplify the thermal protection of the guide channel, save costs, and ensure the smooth progress of subsequent tests.

[0024] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the invention. Attached Figure Description

[0025] Figure 1 This is a simplified structural diagram of the reusable liquid rocket guide channel structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the first water inlet pipe, the second water inlet pipe, the third water inlet pipe, the curved conduit and the circular conduit of the present invention;

[0027] Figure 3This is a simplified structural diagram of the projected flow guiding motherboard of the present invention;

[0028] Figure 4 This is a simplified structural diagram of the curved conduit of the present invention;

[0029] Figure 5 This is a top view of the circular conduit and the second nozzle of the present invention;

[0030] Figure 6 This is a simplified diagram showing the positional relationship between the circular guide tube and the second nozzle of the present invention;

[0031] Figure 7 This is a bottom view of the first cooling device of the present invention;

[0032] Figure 8 This is a perspective view of the first cooling device of the present invention;

[0033] Figure 9 This is a perspective view of the support leg and circular plate of the present invention;

[0034] Figure 10 This is a simplified structural diagram showing the positional relationship between the support legs, circular plate, and circular guide tube of the present invention.

[0035] Figure label:

[0036] 1. Mainboard for airflow control; 2. Side panel

[0037] 3 First cooling device 4 First water inlet pipe

[0038] 5 First water inlet 6 Reinforcing ribs

[0039] 7 Extension plate 8 Bent conduit

[0040] 9 First nozzle 10 Second inlet pipe

[0041] 11. Circular conduit; 12. Third water inlet pipe.

[0042] 13 Second nozzle 14 Support leg

[0043] 15 round plate 16 drain port Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0045] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0048] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the present invention provides a reusable liquid rocket guide channel structure, comprising a guide main plate 1, side plates 2 and multiple first cooling devices 3. The side plates 2 are located on both sides of the guide main plate 1 and are connected to the guide main plate 1 to form a guide surface. Adjacent first cooling devices 3 are fixedly and evenly laid on the surface of the guide surface and their two ends are fixedly connected to the side plates 2 respectively. Each first cooling device 3 has a first water inlet 5 and a first water inlet pipe 4 connected to the first water inlet 5 on the side close to the guide surface, and multiple water spray holes are provided on the side surface away from the guide surface.

[0050] Specifically, the present invention provides a reusable liquid rocket guide channel structure, which consists of a main guide plate 1, a side plate 2, and multiple first cooling devices 3.

[0051] Since multiple first cooling devices 3 are laid on the surface of the guide surface, when the high-temperature flame burns the guide surface, liquid water is sprayed through multiple water spray holes of the first cooling device 3 to cool the high-temperature flame, thereby further protecting the surface of the guide surface and mitigating the impact of high-temperature airflow on the surface of the guide surface, thus playing a role in noise reduction.

[0052] In addition, since the first cooling device 3 is fixed and evenly laid on the surface of the guide surface, the liquid water sprayed from the multiple water spray holes is more uniform, which can make the surface of the guide surface cool evenly and ensure the stability of the guide surface structure.

[0053] Since the adjacent first cooling devices 3 are fixedly and evenly laid on the surface of the guide surface and their two ends are fixedly connected to the side plate 2 respectively, multiple first cooling devices 3 can be firmly fixed, preventing the first cooling devices 3 from deforming, while further ensuring that liquid water can be safely sprayed out from the water spray hole, thereby protecting the stability of the guide surface structure.

[0054] The entire reusable liquid rocket guide channel structure can be quickly adapted and adjusted to reduce the ablation of the guide surface by the high-temperature exhaust flame of the rocket engine, ensure the safety and stability of the guide channel structure under high-temperature conditions, achieve the effect of cooling and noise reduction, simplify the thermal protection of the guide channel, save costs, and ensure the smooth progress of subsequent tests.

[0055] In the same embodiment, to facilitate the guidance of the high-temperature flame and allow it to be quickly discharged from the guide channel, for example, the surface of the multiple first cooling devices 3 away from the guide surface is formed into a curved guide plane. To ensure the structural stability of the first cooling device 3 and to facilitate the flow of liquid water within the first cooling device 3, for example, the first cooling device 3 is a cuboid structure with two open ends and an internal flow channel.

[0056] It is worth mentioning that, to increase the output pressure of liquid water from the spray orifice, the orifice is designed with a Laval nozzle structure. A Laval nozzle structure mainly consists of three parts: a contraction section, a throat section, and a dilatation section. The outlet end of the dilatation section extends away from the guide surface. By designing the spray orifice with a Laval nozzle structure, liquid water is ejected from the guide surface in a mist-like jet, achieving the cooling function of the rocket's exhaust plume.

[0057] In the same embodiment, to ensure a tight and secure connection between the main flow guiding plate 1 and the side plate 2, for example, the main flow guiding plate 1 and the side plate 2 are welded together. To prevent the main flow guiding plate 1 from shifting due to high-temperature gas pressure, for example, the side of the main flow guiding plate 1 away from the first cooling device 3 is connected to the ground via an H-beam. Furthermore, to ensure the structural stability of the side plate 2 and prevent deformation due to the impact of high-temperature gas, for example, a reinforcing rib 6 is provided on the surface of the side plate 2 away from the main flow guiding plate 1, and the reinforcing rib 6 is welded to the side plate 2. To ensure the structural stability of the main flow guiding plate 1, for example, the projection of the main flow guiding plate 1 onto the ground is rectangular, and the length direction of the shorter side is perpendicular to that of the side plate 2.

[0058] Furthermore, in order to reduce the burning of the main flow guiding board 1, side plate 2 and first cooling device 3 by high-temperature flames and to ensure that the main flow guiding board 1, side plate 2 and first cooling device 3 can be used safely for a long time, for example, the surfaces of the main flow guiding board 1, side plate 2 and first cooling device 3 are all provided with heat-resistant coatings, and the heat-resistant coatings are respectively bonded to the surfaces of the main flow guiding board 1, side plate 2 and first cooling device 3.

[0059] It should be noted that, in order to ensure the stability of the entire guide channel structure and prevent tilting due to pressure, for example, an extension plate 7 is provided at the end of the side plate 2 near the ground. The extension plate 7 extends away from the first cooling device 3 and is welded to the side plate 2. The extension plate 7 is also fixed to the ground by locking bolts. The design of the extension plate 7 increases the contact area with the ground and reduces the probability of the guide channel structure tilting. In this embodiment, the extension plate 7 is rectangular and has multiple protrusions evenly arranged on the side away from the side plate 2. The protrusions are rectangular parallelepipeds with fixing holes.

[0060] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, to further protect the safety of the guide surface and avoid damage due to prolonged use in high-temperature environments, the reusable liquid rocket guide channel structure also includes a second cooling device. To ensure the second cooling device is securely fixed and prevent it from falling off, for example, the second cooling device is located at the end of the side plate 2 away from the ground and is tightly attached to and welded to the end faces of the main guide plate 1 and the side plate 2 respectively.

[0061] In this embodiment, the second cooling device includes a curved conduit 8 with an internal flow channel and closed at both ends, and a first nozzle 9 connected to the curved conduit 8. To facilitate the matching and fixing of the curved conduit 8 with the flow guide channel, for example, the projection of the curved conduit 8 on the ground is a U-shaped structure. In practical applications, to ensure that liquid water can quickly enter the interior of the curved conduit 8, for example, a second water inlet pipe 10 and a second water inlet connected to the second water inlet pipe 10 are provided on the part of the curved conduit 8 located on the flow guide main plate 1, wherein the length of the curved conduit 8 located on the flow guide main plate 1 is A, and the second water inlet is located at 1 / 2A.

[0062] In order to ensure that liquid water can be sprayed out evenly from the first nozzle 9 and reduce the erosion of the side plate 2 by the high temperature flame, for example, the first nozzle 9 is evenly distributed on the part of the curved conduit 8 located on the side plate 2, and the opening end of the first nozzle 9 extends towards the other side plate 2.

[0063] Specifically, to further protect the guide surface and prevent damage from prolonged use in high-temperature environments, while also reducing noise, the reusable liquid rocket guide channel structure includes a third cooling device. This third cooling device comprises a circular conduit 11 with internal flow channels and interconnected end-to-end, a third water inlet pipe 12, and multiple second nozzles 13. The circular conduit 11 is located above the guide surface and fixed by a support frame. When the high-temperature flame generated by the rocket engine penetrates the circular conduit 11, liquid water is sprayed onto the high-temperature flame through the second nozzles 13, reducing the flame temperature and further reducing the impact of the high-temperature flame on the guide surface, thereby effectively protecting the guide surface and reducing noise.

[0064] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the outlet of the third water inlet pipe 12 is connected to the circular guide pipe 11, and the inlet of the third water inlet pipe 12 is connected to the second water inlet pipe 10. The second nozzles 13 are evenly distributed inside the circular guide pipe 11, and the inlet of the second nozzle 13 is connected to the circular guide pipe 11, while the outlet extends towards the center of the circle formed by the circular guide pipe 11. In addition, the connection between the third water inlet pipe 12 and the second water inlet pipe 10 facilitates the control of the water supply to the circular guide pipe 11 and the curved guide pipe 8, ensuring that liquid water can be sprayed out simultaneously from the first nozzle 9 and the second nozzle 13, quickly cooling the guide surface, and also reducing noise.

[0065] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, in order to increase the contact area between the liquid water and the high-temperature flame and make full use of water resources, for example, the height of the water outlet end of the second nozzle 13 is lower than the height of the water inlet end of the second nozzle 13, that is, there is an angle B between the extended lines of the two ends of the second nozzle 13 and the circular plane formed by the center line of the circular guide tube. After a large number of simulation tests, when B satisfies 10°≤B≤30°, not only can more liquid water contact the high-temperature flame, reducing the impact of the high-temperature flame on the guide surface and reducing noise pollution, but also the radial output of the high-temperature flame can be reduced, further reducing the impact of the high-temperature flame on the side plate and improving the stability and safety of the guide channel structure.

[0066] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 and Figure 10 As shown, in order to facilitate the installation and fixation of the circular guide tube 11, for example, the support frame includes a support leg 14 and a circular plate 15 that matches the circular guide tube 11 and has a central hole. The support leg 14 is located at the lower part of the circular plate 15 and is welded and fixed to the circular plate 15. The circular guide tube 11 is located at the lower part of the circular plate 15 and is fixed to the fixing strip provided on the lower side of the circular plate 15 by a U-shaped clamp.

[0067] In the same embodiment, in order to further prevent the high-temperature flame from burning the circular guide tube 11, for example, the diameter of the central hole of the circular plate 15 is smaller than the diameter of the circle formed by the circular guide tube 11. That is, the circular plate 15 is similar to a protective plate, covering the upper part of the circular guide tube, preventing the high-temperature flame from directly burning the upper surface of the circular guide tube 11 and causing deformation, thereby ensuring the structural stability of the circular guide tube 11.

[0068] In actual use, in order to prevent the first cooling device 3 from shifting on the surface of the guide plate due to uneven pressure, for example, adjacent first cooling devices 3 are fixedly connected by welding, and the side of the first cooling device 3 that is close to the guide surface is welded and fixed to the guide plate 1.

[0069] After the flow channel structure is used up, in order to ensure that the internal flow channel of the first cooling device 3 is dry, for example, drain ports 16 are symmetrically arranged along the length of the first cooling device 3 and on both sides of the first inlet 5, and drain caps are installed on the drain ports 16. The drain caps are fixedly connected to the first cooling device 3 by locking bolts to seal the drain ports. The main flow guide plate 1 is provided with opening channels corresponding to the first inlet 5 and the drain ports 16. When in use, the drain caps on the drain ports 16 are opened respectively, and the gas enters from one end of the drain port 16 and exits from the other end of the drain port 16, so that the liquid water in the flow channel is blown away, ensuring that the inside of the first cooling device 3 is dry. The setting of the drain ports 16 can prevent the liquid water from corroding the inner wall of the first cooling device 3 and causing rust, further improving the service life of the first cooling device 3.

[0070] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in order to reduce the burning of the guide surface by the high-temperature flame and reduce the pressure on the surface of the guide main board 1, for example, the surface of the guide main board 1 away from the ground is designed to be smooth (the surface of the guide main board at this end is not equipped with the first cooling device). To further explain, after a large number of experimental simulations, the length of the guide main board 1 is C (the length of the guide main board 1 from the top to the bottom). The first cooling device 3 is arranged from the top to the bottom of the guide main board 1. When the first cooling device 3 is arranged sequentially from 1 / 10C to 3 / 10C downwards, the high-temperature flame can not only be quickly guided, but also the pressure on the surface of the guide main board 1 can be reduced, making the entire guide channel structure more stable and ensuring that subsequent experiments are safer and more reliable.

[0071] To ensure the structural stability of the main flow guiding plate 1 and prevent deformation, for example, a reinforcing beam (strip structure) is provided on the side of the main flow guiding plate 1 away from the first cooling device 3. One end of the reinforcing beam is welded to the main flow guiding plate 1, and the other end is fixed to the ground with concrete.

[0072] The above embodiments can be combined with each other and have corresponding technical effects.

[0073] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A reusable liquid rocket guide channel structure, characterized in that, It includes a main flow guiding plate, side plates, and multiple first cooling devices. The side plates are located on both sides of the main flow guiding plate and are interconnected with it to form a flow guiding surface. The adjacent first cooling devices are fixedly and evenly laid on the surface of the guide surface and their two ends are fixedly connected to the side plate respectively. Each first cooling device has a first water inlet and a first water inlet pipe connected to the first water inlet on the side close to the guide surface, and multiple water spray holes are provided on the side surface away from the guide surface.

2. The reusable liquid rocket guide channel structure according to claim 1, characterized in that, The surfaces of the first cooling devices away from the flow guide surface form a curved flow guide plane, wherein the first cooling device is a cuboid structure with two open ends and internal flow channels.

3. The reusable liquid rocket guide channel structure according to claim 1, characterized in that, The water jet orifice has a Laval nozzle structure.

4. The reusable liquid rocket guide channel structure according to claim 1, characterized in that, The main flow guide plate and the side plate are welded and fixed. The side of the main flow guide plate away from the first cooling device is connected to the ground by a support I-beam. The side plate is provided with a reinforcing rib on the side away from the main flow guide plate. The reinforcing rib is welded and fixed to the side plate. The projection of the main flow guide plate onto the ground is rectangular, and the length direction of the short side is perpendicular to the side plate.

5. The reusable liquid rocket guide channel structure according to claim 1, characterized in that, The side plate has an extension plate at one end near the ground, wherein the extension plate extends away from the first cooling device, the extension plate is welded to the side plate, and the extension plate is fixedly connected to the ground by locking bolts.

6. The reusable liquid rocket guide channel structure according to claim 1, characterized in that, It also includes a second cooling device, which is located at the end of the side plate away from the ground and is tightly attached to and welded to the end face of the main flow guide plate and the side plate respectively. The second cooling device includes a curved conduit with an internal flow channel and closed at both ends, and a first nozzle connected to the curved conduit.

7. The reusable liquid rocket guide channel structure according to claim 6, characterized in that, The curved conduit has a U-shaped projection on the ground, and a second water inlet and a second water outlet connected to the second water inlet are provided on the part of the curved conduit located on the main guide plate. The first nozzles are evenly distributed on the part of the curved conduit located on the side plate, and the opening end of the first nozzle extends towards the other side of the side plate.

8. The reusable liquid rocket guide channel structure according to claim 7, characterized in that, It also includes a third cooling device, which comprises a circular conduit with an internal flow channel and connected end to end, a third water inlet pipe, and multiple second nozzles. The circular conduit is located above the flow guide surface and is fixed by a support frame. The outlet end of the third water inlet pipe is connected to the circular guide tube, the inlet end of the third water inlet pipe is connected to the second water inlet pipe, the second nozzles are evenly distributed inside the circular guide tube, and the inlet end of the second nozzle is connected to the circular guide tube, and the outlet end extends toward the center of the circle formed by the circular guide tube.

9. The reusable liquid rocket guide channel structure according to claim 8, characterized in that, The support frame includes legs and a circular plate with a central hole that matches the circular guide tube. The legs are located at the lower part of the circular plate and are welded and fixed to the circular plate. The circular guide tube is located at the lower part of the circular plate and is fixed to the circular plate by a U-shaped clamp.

10. The reusable liquid rocket guide channel structure according to claim 9, characterized in that, The diameter of the central hole is smaller than the diameter of the circle formed by the circular guide tube.

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