A rotary detonation vector propulsion device based on inner column swing

Abstract

The application provides a rotary detonation vector propulsion device based on inner column swing, which comprises a driving rod, a movable combustion chamber inner column, a combustion chamber head and a tail nozzle. The movable combustion chamber inner column comprises a movable combustion chamber inner column front end spherical surface and a movable combustion chamber inner column rear end cylinder; the combustion chamber head comprises an injection structure, a combustion chamber head straight ring plate, a combustion chamber head curved ring plate, a high-temperature-resistant sealing ring and a cooling channel; the tail nozzle is a plug nozzle, which comprises a plug nozzle outer ring and a plug nozzle center cone. The case or the parts fixed on the case are connected with the driving rod front end through a rotary pair, the driving rod rear end is connected with the inside of the movable combustion chamber inner column front end spherical surface through a rotary pair, and the movable combustion chamber inner column front end spherical surface outer wall is matched with the inner wall of the combustion chamber head curved ring plate through a spherical pair. When the device works, the two rotary pairs are respectively driven to rotate by the motor at a certain angular velocity, so that the movable combustion chamber inner column swings and deflects, the rotary detonation wave intensity in the combustion chamber and the gas flow are uneven, and thus the rotary detonation engine generates a vector thrust. The application can be used in the fields of rotary detonation vector propulsion and the like.

Description

Technical Field

[0001] This invention relates to the field of detonation propulsion and vector propulsion, specifically to a rotary detonation vector propulsion device based on the oscillation of an inner column. Background Technology

[0002] Rotating detonation engines are a new type of engine that utilizes rotating detonation waves to generate thrust. Compared with the slow combustion commonly used in existing aerospace engines, detonation combustion has advantages such as rapid energy release and self-pressurization, and has become a research hotspot in aerospace propulsion technology.

[0003] Vector propulsion technology is an indispensable technology for advanced aircraft. Its core is to obtain additional control torque to adjust the flight attitude, which can improve the performance of the aircraft during takeoff, cruise, combat and landing.

[0004] Traditional aerospace engines typically generate vector thrust by installing vectoring nozzles, but these nozzles suffer from drawbacks such as structural complexity and high control difficulty. Rotating detonation engines have various combustion chamber structures, including annular, cylindrical, and disc-type combustion chambers. For annular rotating detonation combustion chambers, the inhomogeneity between the rotating detonation wave intensity and the gas flow within the combustion chamber can be created by the oscillation of an inner column, thereby generating vector thrust. Therefore, this invention proposes a rotating detonation vector propulsion device based on the oscillation of an inner column. This device enables rotating detonation engines to perform vector propulsion without introducing vectoring nozzles, which involve more complex structural design and control strategies. This simplifies the engine structure and is of great significance for the practical application of rotating detonation engines. Summary of the Invention

[0005] The technical problem to be solved:

[0006] To address the challenges of complex structures and high control difficulty associated with traditional engine vectoring nozzles, this invention proposes a rotary detonation vectoring propulsion device based on the oscillation of an inner column. By manipulating a drive rod, the movable inner column of the combustion chamber can oscillate, creating uneven intensity of the rotary detonation wave within the combustion chamber compared to the gas flow, thereby generating vector thrust. This invention can be applied in fields such as detonation propulsion.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A rotary detonation vector propulsion device based on the swing of an inner column includes a drive rod, a movable inner column of the combustion chamber, a combustion chamber head, and a tail nozzle.

[0009] The drive rod is located at the front of the combustion chamber, with its central axis coinciding with that of the combustion chamber. The front end of the drive rod is connected to the casing or a component fixed to the casing via a revolute joint, and the rear end is connected to the interior of the spherical surface at the front end of the movable combustion chamber's inner column via a revolute joint. The revolute joint can be driven by a motor.

[0010] The movable combustion chamber inner column is located at the center of the combustion chamber and includes a spherical surface at the front end and a cylindrical surface at the rear end. The outer wall of the spherical surface at the front end of the movable combustion chamber inner column is fitted with the inner wall of the curved ring plate at the head of the combustion chamber via a ball joint. The center of the spherical surface at the front end of the movable combustion chamber inner column is located on the central axis of the combustion chamber. The outer diameter R of the spherical surface at the front end of the movable combustion chamber inner column should satisfy the following geometric relationship: R in <R<α(R) out -S), where R in R is the radius of the rear cylindrical section of the movable combustion chamber column. out Let S be the inner diameter of the outer ring of the combustion chamber, S be the distance from the inlet of the injection structure at the combustion chamber head near the center of the combustion chamber to the inner wall of the outer ring of the combustion chamber, and α be the upper limit limit coefficient for the outer diameter of the spherical surface at the front end of the movable combustion chamber inner column, with a value range of 0.4 to 0.6. The angle θ1 between the line connecting the front edge of the spherical surface at the front end of the movable combustion chamber inner column and the center of the spherical surface at the front end of the movable combustion chamber inner column in its non-swinging state and the central axis of the combustion chamber should satisfy the geometric relationship: θ1 = θ2 + θ3 + θ4 + θ5, where θ2 is the angle between the line connecting the front edge of the inner wall of the straight ring plate at the combustion chamber head and the center of the sphere and the central axis of the combustion chamber, θ3 is the outer diameter of the outer ring of the combustion chamber inner column, and α is the outer diameter of the outer ring of the movable combustion chamber inner column. The angle formed by the line connecting the front edge of the inner wall of the head curved ring plate and the center of the sphere, θ4 is the maximum angle at which the movable combustion chamber column can swing, and θ5 is the machining allowance of the spherical surface at the front end of the movable combustion chamber column, with a value range of 1.5° to 2.5°. The interior of the spherical surface at the front end of the movable combustion chamber column is connected to the rear end of the drive rod through a rotating joint, the center of which coincides with the center of the sphere of the spherical surface at the front end of the movable combustion chamber column. The central axis of the cylinder at the rear end of the movable combustion chamber column coincides with the central axis of the spherical surface at the front end of the movable combustion chamber column. The cylinder at the rear end of the movable combustion chamber column can be fixed to the spherical surface at the front end of the movable combustion chamber column by welding or additive manufacturing technology.

[0011] The combustion chamber head is located behind the drive rod and is coaxially mounted with the drive rod. It includes an injection structure, a straight annular plate at the combustion chamber head, a curved annular plate at the combustion chamber head, a high-temperature resistant sealing ring, and cooling channels. The injection structure can inject and mix oxidizer and fuel using methods such as circumferential-circumferential or circumferential-orifice injection. The horizontal distance L1 between the plane where the injection structure inlet is located and the center of the rotating joint connecting the drive rod and the spherical surface at the front end of the movable combustion chamber inner column should satisfy the geometric relationship: β1R < L1 < β2R, where β1 is the lower limit limiting coefficient of the horizontal distance L1 between the plane where the injection structure inlet is located and the center of the rotating joint connecting the drive rod and the spherical surface at the front end of the movable combustion chamber inner column, with a value range of 0.85 to 0.95; β2 is the lower limit limiting coefficient of the horizontal distance L1 between the plane where the injection structure inlet is located and the center of the rotating joint connecting the drive rod and the spherical surface at the front end of the movable combustion chamber inner column, with a value range of 0.85 to 0.95; and β2 is the lower limit limiting coefficient of the horizontal distance L1 between the plane where the injection structure inlet is located and the center of the rotating joint connecting the drive rod and the movable combustion chamber inner column. The upper limit limiting coefficient of the horizontal distance L1 between the centers of the revolute joints connected inside the spherical surface at the front end of the indoor column is 1.2 to 1.4. The distance L2 between the plane where the injection structure inlet is located and the plane where the injection structure outlet is located is 0.8 to 1.2 cm. The straight ring plate at the combustion chamber head extends from the plane where the injection structure at the combustion chamber head is located to the outer wall of the spherical surface at the front end of the movable combustion chamber inner column. The generatrix of the inner wall of the straight ring plate at the combustion chamber head passes through the center of the spherical surface at the front end of the movable combustion chamber inner column, and the angle θ2 between it and the central axis of the combustion chamber satisfies the geometric relationship: θ2=θ4+arcsin(R in / R)+θ * , where θ * The working margin of the cooling channel is the sum of the machining allowance and the maximum swing angle θ4 of the movable combustion chamber inner column, ranging from 2.5° to 3.5°. The thickness of the straight ring plate at the combustion chamber head is L2. The curved ring plate at the combustion chamber head is located in front of the straight ring plate. The inner wall of the curved ring plate and the outer wall of the spherical surface at the front end of the movable combustion chamber inner column are fitted by a ball joint. The thickness of the curved ring plate is L2. The angle θ3 formed by the line connecting the rear edge of the inner wall of the curved ring plate and the center of the sphere ranges from 20° to 40°. The high-temperature resistant sealing ring is located behind the front edge of the curved ring plate at the combustion chamber head, at a distance of L3 from the front edge of the curved ring plate, ranging from 0.5 to 1.0 cm. The sealing ring thickness L4 satisfies the geometric relationship L4=εL2, where the value of the high-temperature resistant sealing ring thickness coefficient ε ranges from 0.25 to 0.35, and the value of the angle θ5 formed by the line connecting the leading edge and rear edge of the high-temperature resistant sealing ring with the center of the sphere ranges from 4° to 8°. The cooling channels are located on the rear side of the high-temperature resistant sealing ring, with n channels evenly distributed circumferentially. The value of the number of cooling channels n ranges from 72 to 144, and the diameter D of the cooling channels satisfies the geometric relationship: D=λ·(2πR / n), where the value of the cooling channel diameter coefficient λ ranges from 0.25 to 0.35. The cooling channels extend from the outer wall of the curved ring plate at the head of the combustion chamber to the inner wall of the straight ring plate at the head of the combustion chamber, thereby reducing the temperature around the high-temperature resistant sealing ring and extending its service life.

[0012] The tail nozzle is located at the rear of the combustion chamber and is a plug nozzle, including a plug nozzle outer ring and a plug nozzle central cone. The tail nozzle structure limits the maximum angle θ4 that the movable combustion chamber inner column can swing. The maximum angle θ4 is the angle at which the movable combustion chamber inner column swings relative to the central axis of the combustion chamber when the minimum throat distance of the tail nozzle decreases to 35% of the state when the movable combustion chamber inner column is not swinging.

[0013] Beneficial effects:

[0014] The present invention provides a rotary detonation vector propulsion device based on internal column oscillation. By oscillating the column inside the combustion chamber, unevenness in the intensity of the rotary detonation wave and the gas flow is created within the combustion chamber. This allows vector thrust to be generated without introducing vector nozzles, which have drawbacks such as complex structure and high control difficulty. The present invention can be used in fields such as rotary detonation vector propulsion. Attached Figure Description

[0015] Figure 1 This is an isometric 1 / 4 sectional view of a rotary detonation vector propulsion device based on the oscillation of an inner column according to the present invention;

[0016] Figure 2 This is a cross-sectional view of a rotary detonation vector propulsion device based on the oscillation of an inner column according to the present invention in the state where the inner column is not oscillating;

[0017] Figure 3 This is a cross-sectional view of a rotary detonation vector propulsion device based on the swing of an inner column according to the present invention at the maximum swing angle of the inner column.

[0018] Figure 4 This is a rear view of the working state of a rotary detonation vector propulsion device based on the oscillation of an inner column according to the present invention.

[0019] Wherein, 1 is the casing or a part fixed on the casing, 2 is the drive rod, 3 is the movable combustion chamber inner column, 4 is the spherical surface at the front end of the movable combustion chamber inner column, 5 is the cylindrical rear end of the movable combustion chamber inner column, 6 is the combustion chamber head, 7 is the injection structure, 8 is the straight ring plate at the combustion chamber head, 9 is the curved ring plate at the combustion chamber head, 10 is the high-temperature resistant sealing ring, 11 is the cooling channel, 12 is the rotating joint connection between the casing or a part fixed on the casing and the front end of the drive rod, 13 is the rotating joint connection between the rear end of the drive rod and the interior of the spherical surface at the front end of the movable combustion chamber inner column, 14 is the ball joint fit between the outer wall of the spherical surface at the front end of the movable combustion chamber inner column and the inner wall of the curved ring plate at the combustion chamber head, 15 is the tail nozzle, 16 is the outer ring of the plug nozzle, and 17 is the central cone of the plug nozzle. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific implementation process.

[0021] See Figure 1 A rotary detonation vector propulsion device based on the oscillation of an inner column is disclosed, comprising a drive rod 2, a movable inner column 3 of the combustion chamber, a combustion chamber head 6, and a tail nozzle 15. The movable inner column 3 includes a spherical surface 4 at its front end and a cylindrical surface 5 at its rear end. The combustion chamber head 6 includes an injection structure 7, a straight annular plate 8, a curved annular plate 9, a high-temperature resistant sealing ring 10, and cooling channels 11. The tail nozzle 15 is a plug-type nozzle, including an outer ring 16 and a central cone 17. A housing or a component 1 fixed to the housing is connected to the front end of the drive rod 2 via a revolute joint 12. The rear end of the drive rod 2 is connected to the interior of the spherical surface 4 at the front end of the combustion chamber via a revolute joint 13. Both revolute joints 12 and 13 can be driven to rotate by a motor, and their rotation axes are perpendicular to ensure that the working space of the movable inner column 3 is a spherical surface symmetrical about the central axis of the combustion chamber. The outer wall of the spherical surface 4 at the front end of the movable combustion chamber inner column and the inner wall of the curved ring plate 9 at the combustion chamber head are fitted by a ball joint 14. The injection structure 7 supplies oxidant and fuel and mixes them. The high-temperature resistant sealing ring 10 is used to prevent gas leakage. The cooling channel 11 extends the service life of the high-temperature resistant sealing ring by reducing the temperature around it. The center of the rotating joint 13, the center of the spherical surface 4 at the front end of the movable combustion chamber inner column, and the center of the generatrix of the inner wall of the curved ring plate 9 coincide.

[0022] Example:

[0023] See Figure 1 and Figure 4 Rotary joint 12 is driven to rotate by a motor at an angular velocity of 2° / s, and rotary joint 13 is driven to rotate by a motor at an angular velocity of 1° / s. After 3 seconds, the column inside the movable combustion chamber swings and deflects. At this time, the intensity of the rotating detonation wave inside the combustion chamber is not uniform with the gas flow, thereby causing the rotating detonation engine to generate vector thrust.

[0024] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings and specific implementation processes. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various adjustments and optimizations to the above methods without departing from the basic principles of the present invention.

Claims

1. A rotary detonation vector propulsion device based on inner column oscillation, comprising a drive rod, a movable inner column of the combustion chamber, a combustion chamber head, and a tail nozzle, characterized in that, When the device is in operation, the movable combustion chamber column can be oscillated by manipulating the drive rod, causing uneven intensity of the rotating detonation wave and gas flow in the combustion chamber, thereby generating vector thrust in the rotating detonation engine.

2. The rotary detonation vector propulsion device based on inner column oscillation according to claim 1, characterized in that, The drive rod is located on the front side of the combustion chamber, and the central axis of the drive rod coincides with the central axis of the combustion chamber. The front end of the drive rod is connected to the casing or a part fixed on the casing through a rotating joint, and the rear end is connected to the interior of the spherical surface at the front end of the movable combustion chamber column through a rotating joint. The rotating joint can be driven by a motor.

3. The rotary detonation vector propulsion device based on inner column oscillation according to claim 1, characterized in that, The movable combustion chamber inner column includes a spherical surface at the front end and a cylindrical surface at the rear end. The outer wall of the spherical surface at the front end of the movable combustion chamber inner column is fitted with the inner wall of the curved ring plate at the head of the combustion chamber via a ball joint. The center of the spherical surface at the front end of the movable combustion chamber inner column is located on the central axis of the combustion chamber. The interior of the spherical surface at the front end of the movable combustion chamber inner column is connected to the rear end of the drive rod via a revolute joint, the center of which coincides with the center of the spherical surface at the front end of the movable combustion chamber inner column. The central axis of the cylindrical surface at the rear end of the movable combustion chamber inner column coincides with the central axis of the spherical surface at the front end of the movable combustion chamber inner column. The cylindrical surface at the rear end of the movable combustion chamber inner column can be fixed to the spherical surface at the front end of the movable combustion chamber inner column by welding or additive manufacturing technology.

4. The rotary detonation vector propulsion device based on inner column oscillation according to claim 1, characterized in that, The combustion chamber head includes an injection structure, a straight annular plate, a curved annular plate, a high-temperature resistant sealing ring, and cooling channels. The injection structure can inject and mix oxidizer and fuel using methods such as circumferential-circumferential or circumferential-injection hole. The straight annular plate extends from the plane of the injection structure to the outer wall of the spherical surface at the front end of the movable combustion chamber inner column, and the generatrix of the inner wall of the straight annular plate passes through the center of the spherical surface at the front end of the movable combustion chamber inner column. The curved annular plate is located in front of the straight annular plate, and its inner wall is fitted with the outer wall of the spherical surface at the front end of the movable combustion chamber inner column via a ball joint. The high-temperature resistant sealing ring is located behind the front edge of the curved annular plate. The cooling channels are located behind the high-temperature resistant sealing ring, evenly distributed circumferentially, and extend from the outer wall of the curved annular plate to the inner wall of the straight annular plate, thereby reducing the temperature around the high-temperature resistant sealing ring and extending its service life.

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