Visual solid propellant high-pressure combustion turbulence device

Abstract

The invention relates to the technical field of solid propellant manufacturing, and particularly discloses a visual solid propellant high-pressure combustion turbulence device which comprises a visual high-pressure combustion chamber (1), an electric heating wire ignition system (2), a particle filtering device (3), a combustion turbulence device (4), a flow channel controller (5) and a medicine strip clamp (6). The visual high-pressure combustion chamber (1) comprises an upper flange end cover (11), a lower flange end cover (12) and a closed combustion chamber cavity (13) between the upper flange end cover (11) and the lower flange end cover (12); and the particle filtering device (3), the combustion turbulence device (4), the flow channel controller (5), the electric heating wire ignition system (2) and the medicine strip clamp (6) are respectively arranged in the combustion chamber cavity (13).

Description

Technical Field

[0001] The invention relates to the technical field of solid propellant manufacturing, and in particular to a visualized solid propellant high-pressure combustion turbulence device. Background Art

[0002] Solid propellant technology is a common technology, supporting technology, and leading technology for contemporary missile weapons and aerospace engineering, and is a solid foundation for my country's national defense. The energy source for solid-powered transportation is inevitably inseparable from high-energy solid propellants, which are energetic composite materials composed of oxidizers, combustion agents, adhesives, and functional additives. During the combustion process, energy and gaseous combustion products are released to provide a power source for solid rocket engines, and are widely used in aerospace, missile weapons, and other aspects. The quality of solid propellant combustion performance determines the release rate of gaseous substances and energy, which in turn affects the load capacity, flight time, and flight distance of the aircraft, thereby determining the penetration capability and combat effectiveness of strategic and tactical weapons.

[0003] When solid propellants burn inside an engine, they are accompanied by high temperature and high pressure environmental conditions, so it is difficult to observe the specific phenomena of the combustion. In order to solve this problem, a solid propellant powder combustion experiment is carried out in a closed high-pressure container to simulate its combustion inside a solid engine, and a high-pressure transparent combustion window is opened around the closed high-pressure combustion chamber, so that the measuring instrument can easily observe the combustion phenomenon of the solid propellant in the high-pressure combustion chamber. However, when the solid propellant burns, the smoke formed by the metal combustion condensed phase particles and the coke particles produced by the incomplete combustion of organic matter will enter the observation field due to diffusion and turbulence, thereby affecting the observation of the combustion phenomenon. In order to observe the combustion phenomenon of the solid propellant inside the closed container clearly for a long time without being affected by the particle turbulence on the observation field, it is urgent to propose a visual solid propellant high-pressure combustion turbulence device. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a visualized solid propellant high-pressure combustion turbulence device, which can provide clean internal circulating flow gas in the high-pressure combustion chamber, carry and eliminate smoke particles generated by combustion, and effectively solve the problem of the influence of smoke particles on the observation of combustion phenomena.

[0005] The present invention proposes a visualized solid propellant high-pressure combustion turbulence device, comprising: a visualized high-pressure combustion chamber, a particle filter device of an electric heating wire ignition system for igniting a solid propellant powder strip, a combustion turbulence device, a flow channel controller, and a powder strip clamp;

[0006] The visualized high-pressure combustion chamber comprises: an upper flange end cover, a lower flange end cover, and a combustion chamber cavity sealed between the upper flange end cover and the lower flange end cover;

[0007] The particle filtering device, the combustion turbulence device, the flow channel controller, the electric heating wire ignition system and the medicine strip clamp are respectively arranged inside the combustion chamber cavity;

[0008] The combustion chamber cavity is used as the combustion space of the solid propellant powder strip; the powder strip clamp is used to clamp the solid propellant powder strip; the electric heating wire ignition system is used to ignite the solid propellant powder strip; the particle filter device is used to filter the condensed phase particle gas generated by the combustion of the solid propellant powder strip; the combustion turbulence device is used to drive the airflow in the visualized high-pressure combustion chamber; and the flow channel controller is used to provide a flow channel for the circulating gas in the combustion chamber cavity.

[0009] In a possible implementation, the electric heating wire ignition system includes: a propellant ignition wire, an electric heating wire ignition electrode, and an ignition electrode terminal;

[0010] The middle of the propellant ignition wire passes through the upper end of the solid propellant powder strip, and the two ends of the propellant ignition wire are respectively wound on the heating wire ignition electrode, and the heating wire ignition electrode is fixed and connected to the ignition electrode terminal after passing through the lower flange end cover, and the ignition electrode terminal is connected to an external power supply.

[0011] In a possible implementation, the combustion turbulence device includes: an adjustable speed fan system, an adjustable speed fan system placement platform, and a porous air distribution plate;

[0012] The adjustable speed fan system and the porous air distribution plate are fixed on the adjustable speed fan system placement platform;

[0013] The adjustable speed fan system placement platform includes: a mounting plate, an annular positioning boss for positioning the adjustable speed fan system and the particle filter device, a cylinder, and a groove for positioning a porous air distribution plate;

[0014] The groove is arranged at the upper end of the cylinder;

[0015] The annular positioning boss is arranged at the lower end of the cylinder;

[0016] The mounting plate is mounted on the lower flange end cover via a support rod and a platform fixing nut; the mounting plate extending radially outward is fixed on the outer wall of the lower end of the cylinder;

[0017] The porous air distribution plate comprises: a medicine strip clamp small cylinder, a boss, a porous disc and gas uniform circulation holes;

[0018] The upper part of the porous disc is provided with a small medicine strip clamp cylinder extending axially for placing a clamp platform, and the lower edge of the porous disc is provided with at least two bosses matching with the groove; and the porous disc is provided with a plurality of gas uniform flow holes.

[0019] In a possible implementation, the medicine strip clamp includes: a clamp platform, a fixed clamp and a movable clamp;

[0020] The solid propellant strip is clamped between the fixed clamp and the movable clamp by using a strip fastening bolt on the clamp platform;

[0021] The clamp platform is placed in the medicine strip clamp small cylinder; the flange on the upper end of the clamp platform is positioned at the barrel mouth of the medicine strip clamp small cylinder.

[0022] In a possible implementation, the adjustable speed fan system includes: a fan motor, adjustable speed fan blades, and blade support parts;

[0023] The adjustable speed fan blades are placed in the blade support parts, and the fan motor is placed at the bottom of the blade support parts; the upper surface of the annular positioning boss is used to position the blade support parts of the adjustable speed fan system; the fan motor extends into the particle filter device; and a reserved opening for the fan motor connecting line is reserved on the lower side of the combustion chamber cavity.

[0024] In a possible implementation, the particle filtering device includes: a perforated filter mesh tube and a high temperature resistant activated carbon filter cotton cylinder layer;

[0025] The high temperature resistant activated carbon filter cotton sleeve layer is arranged outside the punching filter mesh tube with a supporting function; the outer ring surface of the annular positioning boss is matched with the inner ring of the punching filter mesh tube for positioning.

[0026] In a possible implementation, the middle portion of the inner wall of the combustion chamber cavity includes a flow channel controller placement boss;

[0027] The flow channel controller placement boss is a ring-shaped structure composed of a plurality of arc-shaped boss segments arranged in a ring pattern, and a space for making way for the visualization window is provided between two adjacent arc-shaped boss segments.

[0028] In a possible implementation, the visualization window includes: an observation transparent window sheet, an observation window cover, an observation window bolt, and an observation window nut;

[0029] The transparent observation window sheet is pressed by the observation window cover plate under the connection and tightening action of the observation window bolt and the observation window nut.

[0030] In a possible implementation, the flow channel controller is located above the visualization window;

[0031] The flow channel controller is composed of an annular column; the central cavity of the annular column is a central flow channel, and the wall of the annular column is composed of a plurality of flow channel controller concave parts and flow channel controller convex parts alternately arranged in sequence;

[0032] A plurality of the concave portions of the flow channel controller form a circulating recirculation flow channel, and each of the circulating recirculation flow channels is connected to the central circulation channel; the convex portion of the flow channel controller is used to change the flow direction of the internal circulating gas, and the interior of the convex portion of the flow channel controller is a hollow trough body for weight reduction, and a recessed portion for making way for a visualization window is provided at the bottom of the convex portion of the flow channel controller, and the axis of the recessed portion corresponds to the axis of each of the visualization windows.

[0033] In a possible implementation, the combustion chamber cavity has an air inlet and an air outlet at the lower portion;

[0034] A combustion chamber air inlet solenoid valve controller is installed at the air inlet;

[0035] A combustion chamber air outlet solenoid valve controller is installed at the air outlet;

[0036] A reserved opening for the fan motor connection line is left in a direction perpendicular to the axis of the air inlet and the air outlet;

[0037] A temperature sensor and a pressure sensor are arranged on the upper portion of the combustion chamber upper flange end cover;

[0038] A small hole is reserved on the lower flange end cover for installing the heating wire ignition electrode;

[0039] The support rods of the three speed-adjustable fan system support platforms are evenly welded on the lower flange end cover in a 120° direction.

[0040] The visualized solid propellant high-pressure combustion turbulence device provided by the present invention has a reasonable and compact structure and an ingenious design. By designing a gas flow channel with a fixed shape, the influence of condensed phase smoke particles produced by the combustion of solid propellant carried by the internal circulating flow gas in the high-pressure combustion chamber on the observation of combustion phenomena is avoided; a particle filtering device is used to remove condensed phase particle products, and clean gas phase combustion products make the combustion of solid propellant closer to the combustion environment inside the solid rocket engine; the device is stable and reliable, can be easily disassembled and maintained, and has a low cost, and can be applied to the observation experiment of high-pressure combustion phenomena of solid propellants under any formulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A cross-sectional view of a visual solid propellant high-pressure combustion turbulence device provided by an embodiment of the present invention;

[0042] Figure 2A cross-sectional view of a visualized high-pressure combustion chamber provided by an embodiment of the present invention;

[0043] Figure 3 A cross-sectional view of a particle filtering device provided by an embodiment of the present invention;

[0044] Figure 4 A cross-sectional view of a combustion turbulence device provided by an embodiment of the present invention;

[0045] Figure 5 A cross-sectional view of a platform for placing an adjustable speed fan system provided by an embodiment of the present invention;

[0046] Figure 6 A schematic diagram of the structure of a speed-adjustable fan system provided by an embodiment of the present invention;

[0047] Figure 7 A schematic diagram of the structure of a porous air distribution plate provided in an embodiment of the present invention;

[0048] Figure 8 A schematic diagram of the structure of a medicine strip clamp provided by an embodiment of the present invention;

[0049] Fig. 9 A schematic diagram of the structure of a flow channel controller provided by an embodiment of the present invention;

[0050] In the drawings, the meanings of the reference numerals are as follows:

[0051] 1-visualized high-pressure combustion chamber; 11-upper flange end cover; 12-lower flange end cover; 13-combustion chamber cavity;

[0052] 111-temperature sensor; 112-pressure sensor; 113-upper flange end cover handle;

[0053] 131- flow channel controller placement boss; 132- air inlet solenoid valve controller; 133- air outlet solenoid valve controller;

[0054] 2-heating wire ignition system; 21-propellant ignition wire; 22-heating wire ignition electrode; 23-ignition electrode terminal;

[0055] 3-particle filter device; 31-high temperature resistant activated carbon filter cotton cylinder layer; 32-punched filter mesh tube;

[0056] 4-combustion turbulence device; 41-adjustable speed fan system placement platform; 42-porous air distribution plate; 43-adjustable speed fan system;

[0057] 411-mounting plate; 412-annular positioning boss; 413-cylinder; 414-groove;

[0058] 421- boss; 422- porous disc; 423- gas uniform flow hole; 424- small cylinder for medicine strip clamp;

[0059] 431- fan motor; 432- adjustable speed fan blades; 433- fan blade support parts;

[0060] 5-flow channel controller; 51-central flow channel; 52-flow channel controller concave portion; 53-flow channel controller convex portion; 54-hollow tank body; 55-relief concave portion;

[0061] 6-medicine strip clamp; 61-clamp platform; 62-fixed clamp; 63-movable clamp; 64-solid propellant medicine strip;

[0062] 7- visualization window; 71- observation transparent window piece; 72- observation window cover plate. DETAILED DESCRIPTION

[0063] The following detailed description of the embodiments of the present invention is further described in detail in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the preferred embodiments described, and the scope of the present invention is defined by the claims.

[0064] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the terms “first”, “second”, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0065] Combination Figure 1-Figure 7 The visualized solid propellant high-pressure combustion turbulence device of the present invention comprises: a visualized high-pressure combustion chamber 1, an electric heating wire ignition system 2 for igniting a solid propellant strip 64, a particle filtering device 3, a combustion turbulence device 4, a flow channel controller 5, and a strip clamp 6.

[0066] Figure 2 A cross-sectional view of a visualized high-pressure combustion chamber 1 provided in an embodiment of the present invention, such as Figure 2 As shown, the visualized high-pressure combustion chamber 1 is a closed container, comprising: an upper flange end cover 11, a lower flange end cover 12, and a combustion chamber cavity 13 sealed between the upper flange end cover 11 and the lower flange end cover 12. The combustion chamber cavity 13 is connected and fastened to the combustion chamber upper flange end cover 11 by upper flange end cover bolts and upper flange end cover nuts. The combustion chamber cavity 13 is connected and fastened to the combustion chamber lower flange end cover 12 by lower flange end cover bolts and lower flange end cover nuts.

[0067] Preferably, the upper flange end cover 11 is also provided with an upper flange end cover handle 113 for easy opening and closing.

[0068] The particle filtering device 3 , the combustion turbulence device 4 , the flow channel controller 5 , the electric heating wire ignition system 2 and the medicine stick clamp 6 are respectively arranged inside the combustion chamber cavity 13 .

[0069] The combustion chamber cavity 13 is used as a combustion space for the solid propellant powder strip 64. The powder strip clamp 6 is used to clamp the solid propellant powder strip 64. The electric heating wire ignition system 2 is used to ignite the solid propellant powder strip 64. The particle filter device 3 is used to filter the condensed phase particle gas generated by the combustion of the solid propellant powder strip 64. The combustion turbulence device 4 is used to drive the air flow in the visualized high-pressure combustion chamber 1. The flow channel controller 5 is used to provide a flow channel for the circulating gas in the combustion chamber cavity 13.

[0070] Before use, the solid propellant strip 64 is clamped by the strip clamp 6. When in use, the electric heating wire ignition system 2 is energized to ignite the solid propellant strip 64, the combustion turbulence device 4 drives the airflow in the visualized high-pressure combustion chamber 1, the flow direction of the circulating gas in the combustion chamber cavity 13 is changed by the flow channel controller 5, the condensed phase particle gas generated by the combustion of the solid propellant strip is filtered by the particle filter device 3, and the phenomena accompanying the combustion of the solid propellant strip 64 in the visualized high-pressure combustion chamber 1 are observed by using external instruments and equipment.

[0071] Figure 1 A cross-sectional view of a visual solid propellant high-pressure combustion turbulence device provided by an embodiment of the present invention, such as Figure 1 As shown, the heating wire ignition system 2 includes: a propellant ignition wire 21, a heating wire ignition electrode 22 and an ignition electrode terminal 23.

[0072] The middle of the propellant ignition wire 21 passes through the upper end of the solid propellant strip 64, and the two ends of the propellant ignition wire 21 are respectively wound on the heating wire ignition electrode 22. The heating wire ignition electrode 22 is fixed and passes through the lower flange end cover 12 and is connected to the ignition electrode terminal 23. The ignition electrode terminal 23 is connected to an external power supply.

[0073] Figure 4 A cross-sectional view of a combustion turbulence device 4 provided in an embodiment of the present invention, as shown in FIG. Figure 4 As shown, the combustion turbulence device 4 includes: an adjustable speed fan system 43, an adjustable speed fan system placement platform 41 and a porous air distribution plate 42.

[0074] The adjustable speed fan system 43 and the porous air distribution plate 42 are fixed on the adjustable speed fan system placement platform 41 . The adjustable speed fan system 43 can rotate slightly to prevent the motor fan airflow from affecting the porous air distribution plate 42 .

[0075] Figure 5A cross-sectional view of a platform for placing an adjustable speed fan system according to an embodiment of the present invention, as shown in FIG. Figure 5 As shown, the adjustable speed fan system placement platform 41 includes: a mounting plate 411, an annular positioning boss 412 for positioning the adjustable speed fan system 43 and the particle filter device 3, a cylinder 413 and a groove 414 for positioning the porous air distribution plate 42.

[0076] The groove 414 is arranged at the upper end of the cylinder 413. The annular positioning boss 412 is arranged at the lower end of the cylinder 413. The mounting plate 411 is mounted on the lower flange end cover 12 via the support rod 415 and the platform fixing nut. The mounting plate 411 extending radially outward is fixed on the lower end outer wall of the cylinder 413.

[0077] Figure 7 A schematic diagram of the structure of a porous air distribution plate provided in an embodiment of the present invention, as shown in FIG. Figure 7 As shown, the porous air distribution plate 42 includes: a medicine strip clamp small cylinder 424, a boss 421, a porous disc 422 and gas uniform circulation holes 423.

[0078] A small medicine strip clamp cylinder 424 extending axially for placing a clamp platform is disposed on the upper part of the porous disc 422, and at least two bosses 421 cooperating with the groove 414 are disposed on the lower edge of the porous disc 422. A plurality of gas uniform flow holes 423 are distributed on the porous disc 422.

[0079] Figure 8 A schematic diagram of the structure of a medicine strip clamp provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the medicine strip clamp 6 includes: a clamp platform 61 , a fixed clamp 62 and a movable clamp 63 .

[0080] The solid propellant medicine strip 64 between the fixed clamping piece 62 and the movable clamping piece 63 is clamped on the clamping platform 61 with a medicine strip fastening bolt to prevent the solid propellant from shaking and tipping during combustion. The clamping platform 61 is placed in the medicine strip clamp small cylinder 424. The flange at the upper end of the clamping platform 61 is positioned at the barrel mouth of the medicine strip clamp small cylinder 424.

[0081] Figure 6 A schematic diagram of the structure of the adjustable speed fan system 43 provided in an embodiment of the present invention is shown in FIG. Figure 6 As shown, the adjustable speed fan system 43 includes: a fan motor 431 , adjustable speed fan blades 432 and blade supporting parts 433 .

[0082] The adjustable speed fan blade 432 is placed in the blade support part 433, and the fan motor 431 is placed at the lower part of the blade support part 433. The upper surface B of the annular positioning boss 412 is used to position the blade support part 433 of the adjustable speed fan system 43. The fan motor 431 extends into the particle filter device 3. A reserved opening for the fan motor connection line is left on the lower side of the combustion chamber cavity 13.

[0083] Figure 3 A cross-sectional view of a particle filter device provided in an embodiment of the present invention, such as Figure 3 As shown, the particle filtering device 3 includes: a high temperature resistant activated carbon filter cotton cylinder layer 31 and a punched filter mesh tube 32.

[0084] The high temperature resistant activated carbon filter cotton cylinder layer 31 is sleeved on the outside of the punching filter mesh tube 32 with supporting function. The outer ring surface A of the annular positioning boss 412 cooperates with the inner ring of the punching filter mesh tube 32 for positioning.

[0085] The middle part of the inner wall of the combustion chamber cavity 13 includes a flow channel controller placement boss 131 .

[0086] The flow channel controller placement boss 131 is a ring-shaped structure composed of a plurality of arc-shaped boss segments arranged in a ring pattern, and there is a space between two adjacent arc-shaped boss segments for making way for the visualization window 7 .

[0087] Four mutually perpendicular visual windows 7 are provided in the middle of the combustion chamber cavity 13. The visual windows 7 include: a transparent observation window sheet 71, an observation window cover plate 72, an observation window bolt and an observation window nut.

[0088] The transparent observation window sheet 71 is pressed by the observation window cover plate 72 under the connection and tightening action of the observation window bolt and the observation window nut.

[0089] Fig. 9 A schematic diagram of the structure of a flow channel controller provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the flow channel controller 5 is located above the visualization window 7. The flow channel controller 5 is composed of an annular column. The central cavity of the annular column is a central flow channel 51, and the wall of the annular column is composed of a plurality of flow channel controller concave portions 52 and flow channel controller convex portions 53 which are alternately arranged in sequence.

[0090] A plurality of concave portions 52 of the flow channel controller form a circulation return flow channel, and each circulation return flow channel is connected to the central circulation channel 51. The convex portion 53 of the flow channel controller is used to change the flow direction of the internal circulation gas. The inside of the convex portion 53 of the flow channel controller is a hollow slot body 54 for reducing weight. The hollow slot body 54 inside reduces the weight of the flow channel controller. The bottom of the convex portion 53 of the flow channel controller has a recess 55 for making way for the visualization window 7. The axis of the recess 55 corresponds to the axis of each visualization window 7 to prevent the particles entrained by the airflow in the circulation channel from affecting the observation.

[0091] The combustion chamber cavity 13 has an air inlet and an air outlet at the lower part.

[0092] A combustion chamber air inlet solenoid valve controller 132 is installed at the air inlet.

[0093] A combustion chamber air outlet solenoid valve controller 133 is installed at the air outlet.

[0094] A reserved opening for the fan motor connection line is left in a direction perpendicular to the axis of the air inlet and the air outlet.

[0095] A temperature sensor 111 and a pressure sensor 112 are provided on the upper portion of the combustion chamber upper flange end cover 11 .

[0096] A small hole is reserved on the lower flange end cover 12 for installing the heating wire ignition electrode 22 .

[0097] The support rods 415 of the three adjustable speed fan system support platforms are evenly welded on the lower flange end cover 12 in a 120° direction.

[0098] The above is the structure of the visualized solid propellant high-pressure combustion turbulence device of the present invention, and the following is the use process of the visualized solid propellant high-pressure combustion turbulence device.

[0099] Place the visualized high-pressure combustion chamber 1 on the experimental platform and fix it, connect the ignition electrode terminal 23 to an external power source, and connect the wires to the reserved opening of the fan motor connection line and seal it. The electromagnetic control valve at the combustion chamber outlet is in the open state, and the electromagnetic control valve at the combustion chamber inlet is in the closed state. Open the upper flange end cover 11 of the visualized high-pressure combustion chamber 1, and the sealed high-pressure combustion chamber is in the open state.

[0100] Place the adjustable speed fan system 43 into the adjustable speed fan system placement platform 41, so that the small cylinder 421 of the porous air distribution plate 42 is at the top for installation, and then rotate the porous air distribution plate 42 slightly counterclockwise so that the protruding bosses 423 on both sides can enter the pits in the adjustable speed fan system placement platform 41 to achieve cooperation, thereby preventing the airflow generated by the adjustable speed fan system 43 from causing fluctuations in the porous air distribution plate 42.

[0101] The high temperature resistant activated carbon filter cotton cylinder layer 31 is inserted into the punched filter mesh tube 32 to form the particle filter device 3 , and the particle filter device 3 is placed in the middle position of the lower flange end cover 12 .

[0102] The combustion turbulence device 4 is placed above the particle filter device 3, and the lower end surface of the adjustable speed fan system placement platform 41 has a boss structure, namely, an annular positioning boss 412, which ensures that the adjustable speed fan system placement platform 41 can closely cooperate with the punching filter mesh tube 32. The adjustable speed fan system placement platform 41 is installed on the support rod 415 of the adjustable speed fan system support platform, and then the platform fixing nut is tightened to ensure that the lower end surface of the adjustable speed fan system support platform 41 is in close contact with the upper end surface of the high temperature resistant activated carbon filter cotton cylinder layer 31 and the lower end surface of the high temperature resistant activated carbon filter cotton cylinder layer 31 is in close contact with the lower flange end cover 12, so as to prevent the condensed phase particles generated by the combustion of the solid propellant powder from flowing in the gap of the contact surface.

[0103] Cut the solid propellant strip 64 into a strip shape with a thickness of 3 mm, a width of 10 mm, and a length of 40 mm, pass the propellant ignition wire 21 through the upper end of the solid propellant strip 64, so that the solid propellant strip 64 is in the middle of the propellant ignition wire 21, place the solid propellant strip 64 on the clamp platform 61, and clamp the solid propellant strip 64 with the strip fastening bolt and the movable clamp 63. Place the solid propellant strip 64 and the clamp with the clamped solid propellant strip in the small cylinder 421 above the porous air distribution plate 42 in the combustion turbulence device 4, and adjust the position of the strip and the clamp so that the largest surface of the solid propellant strip is aligned with the observation view.

[0104] The two ends of the propellant ignition wire 21 are respectively wound around the electric heating wire ignition electrode 22. The flow channel controller 5 is placed on the flow channel controller placement boss 131, and the flow channel controller 5 is rotated and adjusted so that it does not affect the observation field of view. The upper flange end cover bolts and upper flange end cover nuts are used to make the combustion chamber upper flange end cover 11 and the combustion chamber cavity 13 in close contact. During the installation process, the upper flange end cover handle 113 is outside the high-pressure combustion chamber.

[0105] Close the electromagnetic control valve at the combustion chamber outlet, open the electromagnetic control valve at the combustion chamber inlet, introduce high-pressure gas into the visualized high-pressure combustion chamber 1, monitor the pressure inside the combustion chamber using the pressure sensor 112 until the set pressure value is reached, close the electromagnetic control valve at the combustion chamber inlet, and maintain no gas leakage for 30 seconds. Turn on the adjustable speed fan system 43 and set the required speed. Power on the propellant ignition wire 21 to ignite the solid propellant strip 64, and use external instruments and equipment to observe the phenomena accompanying the combustion process of the solid propellant strip 64.

[0106] After the solid propellant strips 64 are burned, the adjustable speed fan system 43 is continuously operated for 3 minutes so that all the condensed phase particles generated by the combustion of the solid propellant strips 64 are adsorbed on the high temperature resistant activated carbon filter cotton cylinder layer 31, and the adjustable speed fan system 43 is shut down, and the electromagnetic control valve at the combustion chamber outlet is opened to discharge the high pressure gas in the combustion chamber.

[0107] When the gas pressure in the combustion chamber is consistent with the external environmental pressure, open the upper flange end cover 11 of the visualized high-pressure combustion chamber 1, take out the flow channel controller 5, then take out the fixture platform 61 of the solid propellant strip, and clamp it again to prepare a new solid propellant strip 64 sample, and repeat the measurement. To measure multiple solid propellant strip 64 combustion experiments, it is necessary to replace the high-temperature resistant activated carbon filter cotton cylinder layer 31, take out the flow channel controller 5, then take out the fixture platform 61 of the solid propellant strip, remove the platform fixing nut, then take out the combustion turbulence device 4, and finally take out the particle filter device 3, replace the new high-temperature resistant activated carbon filter cotton cylinder layer 31, and re-install it in order to complete multiple solid propellant strip 64 combustion phenomenon observation experiments.

[0108] The visualized solid propellant high-pressure combustion turbulence device provided by the present invention comprises a visualized high-pressure combustion chamber, a particle filtering device, an electric heating wire ignition system, a combustion turbulence device, a flow channel controller and a medicine strip clamp. The medicine strip clamp is used to fix the solid propellant medicine strip and reduce the shaking of the solid propellant medicine strip. Gas is introduced into the high-pressure combustion chamber to create different environmental pressures. After the electric heating wire ignites the solid propellant, the combustion phenomenon is observed through four mutually perpendicular visualization windows. The flow channel controller can prevent the combustion condensed phase particles carried by the airflow generated by the adjustable speed fan from affecting the window observation range, and finally the condensed phase particles are filtered through the particle filtering device to purify the internal circulating flow gas. The device of the present invention has a reasonable structure and is stable and reliable, which can effectively solve the problem that smoke particles are not conducive to the observation of combustion phenomena when solid propellants are burned.

[0109] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A device for visualizing high-pressure combustion turbulence of solid propellant, characterized in that: The invention comprises: a visualized high-pressure combustion chamber (1), an electric heating wire ignition system (2) for igniting a solid propellant powder strip (64), a particle filtering device (3), a combustion turbulence device (4), a flow channel controller (5) and a powder strip clamp (6); The visualized high-pressure combustion chamber (1) comprises: an upper flange end cover (11), a lower flange end cover (12), and a combustion chamber cavity (13) sealed between the upper flange end cover (11) and the lower flange end cover (12); The particle filtering device (3), the combustion turbulence device (4), the flow channel controller (5), the electric heating wire ignition system (2) and the medicine strip clamp (6) are respectively arranged inside the combustion chamber cavity (13); The combustion chamber cavity (13) is used as a combustion space for the solid propellant strip (64); the strip clamp (6) is used to clamp the solid propellant strip (64); the electric heating wire ignition system (2) is used to ignite the solid propellant strip (64); the particle filter device (3) is used to filter the condensed phase particle gas generated by the combustion of the solid propellant strip (64); the combustion turbulence device (4) is used to drive the airflow in the visualized high-pressure combustion chamber (1); and the flow channel controller (5) is used to provide a flow channel for the circulating gas in the combustion chamber cavity (13).

2. The visualized solid propellant high-pressure combustion turbulence device according to claim 1, characterized in that: The electric heating wire ignition system (2) comprises: a propellant ignition wire (21), an electric heating wire ignition electrode (22) and an ignition electrode terminal (23); The middle of the propellant ignition wire (21) passes through the upper end of the solid propellant strip (64), and the two ends of the propellant ignition wire (21) are respectively wound on the heating wire ignition electrode (22), and the heating wire ignition electrode (22) is fixed and passes through the lower flange end cover (12) and then connected to the ignition electrode terminal (23), and the ignition electrode terminal (23) is connected to an external power supply.

3. The visualized solid propellant high-pressure combustion turbulence device according to claim 1, characterized in that: The combustion turbulence device (4) comprises: an adjustable speed fan system (43), an adjustable speed fan system placement platform (41) and a porous air distribution plate (42); The adjustable speed fan system (43) and the porous air distribution plate (42) are fixed on the adjustable speed fan system placement platform (41); The adjustable speed fan system placement platform (41) comprises: a mounting plate (411), an annular positioning boss (412) for positioning the adjustable speed fan system (43) and the particle filtering device (3), a cylinder (413) and a groove (414) for positioning a porous air distribution plate (42); The groove (414) is arranged at the upper end of the cylinder (413); The annular positioning boss (412) is arranged at the lower end of the cylinder (413); The mounting plate (411) is mounted on the lower flange end cover (12) via a support rod (415) and a platform fixing nut; the mounting plate (411) extending radially outward is fixed to the outer wall of the lower end of the cylinder (413); The porous air distribution plate (42) comprises: a medicine strip clamp small cylinder (424), a boss (421), a porous disc (422) and gas uniform circulation holes (423); The upper part of the porous disc (422) is provided with a small medicine strip clamp cylinder (424) extending axially for placing a clamp platform, and the lower edge of the porous disc (422) is provided with at least two bosses (421) that cooperate with the groove (414); and the porous disc (422) is distributed with a plurality of gas uniform circulation holes (423).

4. The visualized solid propellant high-pressure combustion turbulence device according to claim 3 is characterized in that: The medicine strip clamp (6) comprises: a clamp platform (61), a fixed clamp (62) and a movable clamp (63); The solid propellant strip (64) is clamped between the fixed clamp (62) and the movable clamp (63) on the clamp platform (61) using a strip fastening bolt; The clamp platform (61) is placed in the medicine strip clamp small cylinder (424); the flange at the upper end of the clamp platform (61) is positioned at the barrel mouth of the medicine strip clamp small cylinder (424).

5. The device for visualizing high-pressure combustion turbulence of solid propellant according to claim 3, characterized in that: The adjustable speed fan system (43) comprises: a fan motor (431), adjustable speed fan blades (432) and blade supporting parts (433); The adjustable speed fan blades (432) are placed in the blade support parts (433), and the fan motor (431) is placed at the bottom of the blade support parts (433); the upper surface of the annular positioning boss (412) is used to position the blade support parts (433) of the adjustable speed fan system (43); the fan motor (431) extends into the particle filtering device (3); and a reserved opening for the fan motor connection line is reserved on the lower side of the combustion chamber cavity (13).

6. The device for visualizing high-pressure combustion turbulence of solid propellant according to claim 3, characterized in that: The particle filtering device (3) comprises: a perforated filter mesh tube (32) and a high temperature resistant activated carbon filter cotton cylinder layer (31); The high temperature resistant activated carbon filter cotton cylinder layer (31) is sleeved on the outside of the punched filter mesh tube (32) having a supporting function; the outer ring surface of the annular positioning boss (412) cooperates with the inner ring of the punched filter mesh tube (32) for positioning.

7. The device for visualizing high-pressure combustion turbulence of solid propellant according to claim 1, characterized in that: The middle part of the inner wall of the combustion chamber cavity (13) includes a flow channel controller placement boss (131); The flow channel controller placement boss (131) is an annular structure composed of a plurality of arc-shaped boss segments arranged in an annular pattern, and a clearance space for accommodating the visualization window (7) is provided between two adjacent arc-shaped boss segments.

8. The device for visualizing high-pressure combustion turbulence of solid propellant according to claim 7, characterized in that: The visualization window (7) comprises: an observation transparent window sheet (71), an observation window cover plate (72), an observation window bolt (111) and an observation window nut (112); The transparent observation window sheet (71) is pressed by the observation window cover plate (72) under the connection and tightening action of the observation window bolt (111) and the observation window nut (112).

9. The device for visualizing high-pressure combustion turbulence of solid propellant according to claim 7, characterized in that: The flow channel controller (5) is located above the visualization window (7); The flow channel controller (5) is composed of an annular column; the central cavity of the annular column is a central flow channel (51); the wall of the annular column is composed of a plurality of flow channel controller concave portions (52) and flow channel controller convex portions (53) which are alternately arranged in a circular pattern; A plurality of the flow channel controller recesses (52) form a circulation recirculation flow channel, and each of the circulation recirculation flow channels is connected to the central circulation channel (51); the flow channel controller protrusion (53) is used to change the flow direction of the internal circulation gas, and the interior of the flow channel controller protrusion (53) is a hollow groove body (54) for reducing weight, and the bottom of the flow channel controller protrusion (53) is provided with a recess (55) for making way for the visualization window (7), and the axis of the recess (55) corresponds to the axis of each of the visualization windows (7).

10. The device for visualizing high-pressure combustion turbulence of solid propellant according to claim 1, characterized in that: The combustion chamber cavity (13) has an air inlet and an air outlet at the lower part; A combustion chamber air inlet solenoid valve controller (132) is installed at the air inlet; A combustion chamber air outlet solenoid valve controller (133) is installed at the air outlet; A reserved opening for the fan motor connection line is left in a direction perpendicular to the axis of the air inlet and the air outlet; A temperature sensor (111) and a pressure sensor (112) are arranged on the upper portion of the combustion chamber upper flange end cover (11); A small hole is reserved on the lower flange end cover (12) for installing the electric heating wire ignition electrode (22); The support rods (415) of the three speed-adjustable fan system support platforms are evenly welded on the lower flange end cover (12) in a 120° direction.

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