Injection device of ramjet

Abstract

The invention discloses a jet device of a ramjet engine, and relates to the technical field of ramjet generators. The injection device of the ramjet engine comprises a combustion chamber and a spray pipe connected to the combustion chamber, a gas injection opening and a liquid injector are arranged at the end, away from the spray pipe, of the combustion chamber, the gas injection opening is used for injecting reactants to the combustion chamber, and the liquid injector is arranged on the outer side of the gas injection opening in the circumferential direction and comprises a plurality of nozzles. The nozzle is used for spraying liquid capable of reacting with reactants to the combustion chamber, the reactants react with the liquid in the combustion chamber and then are sprayed out from the spraying pipe connected to the combustion chamber, and therefore thrust is generated. According to the injection device of the ramjet engine, the multiple nozzles are arranged, so that injected liquid is more dispersed, reaction in the combustion chamber is more sufficient, high-energy particles are prevented from being agglomerated, the high-energy particles can be fully combusted, the injection efficiency of the injection device of the ramjet engine is improved, high-temperature areas generated by the reaction can be reasonably distributed, equipment damage is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of ramjet generators, and in particular to a ramjet engine injection device. Background Art

[0002] With the advancement of ship navigation technology, the speed advantage of conventional underwater navigation bodies such as torpedoes over ships is getting smaller and smaller, and their combat effectiveness is becoming increasingly weakened, which seriously restricts their further development. Therefore, future naval battles will place higher requirements on the speed and range of torpedoes, and there is an urgent need to significantly improve the performance of torpedo power propulsion systems. In the prior art, using a water ramjet as a propulsion device for a torpedo can effectively improve the propulsion effect. A water ramjet refers to an engine that uses environmental substances such as water as an oxidant, and the capture of the oxidant is achieved by high-speed ramjet action. Since there is no need to carry a large amount of oxidant, this power system greatly improves the energy density of the engine.

[0003] There are two main forms of water ramjets, namely, the powder-type water ramjets and the powder-type water ramjets. The powder-type water ramjets carry metal powder as fuel and use the water introduced into the engine as an oxidant, which has a higher energy density. However, there are great difficulties in starting and continuing the reaction between metal powder and water. Taking aluminum powder as an example, aluminum powder particles will agglomerate during the combustion process, and the surface burned part will generate aluminum oxide particles that further wrap the aluminum powder, resulting in incomplete combustion. At the same time, how to regulate the flame generated by the aluminum-water reaction, achieve a reasonable distribution of high-temperature areas, and avoid damage to the engine injectors and combustion chambers is also one of the key issues. In practice, there is an urgent need for injectors with excellent performance to meet the long-life, efficient and stable operation of water ramjets. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a ramjet engine injection device in order to overcome the defects of low injection efficiency, easy damage of the device itself and short service life of the powder ramjet engine injection device in the prior art.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a ramjet engine injection device, which includes a combustion chamber and a nozzle connected to the combustion chamber. The combustion chamber is provided with a gas injection port and a liquid injector at one end away from the nozzle. The gas injection port is used to inject reactants into the combustion chamber. The liquid injector is arranged on the circumferential outer side of the gas injection port. The liquid injector includes a plurality of nozzles, and the nozzles are used to inject liquid that can react with reactants into the combustion chamber.

[0007] In this scheme, a gas injection port and a liquid injector are provided at one end of the combustion chamber away from the nozzle. The gas injection port is used to inject reactants into the combustion chamber. The reactants are high-energy particles and combustible gas. The liquid injector is provided on the circumferential outer side of the gas injection port. The liquid injector includes a plurality of nozzles. The nozzles are used to inject liquid that can react with the reactants into the combustion chamber. The reactants react with the liquid in the combustion chamber and then are ejected from the nozzle connected to the combustion chamber to generate thrust. By providing a plurality of nozzles, the injected liquid is more dispersed, so that the reaction in the combustion chamber is more complete, the agglomeration of high-energy particles is avoided, and the high-energy particles can be fully burned, thereby improving the injection efficiency of the ramjet engine injection device, and also making the high-temperature area generated by the reaction reasonably distributed, avoiding equipment damage and increasing the service life.

[0008] Preferably, the nozzle comprises an ignition nozzle, a reaction nozzle and a protection nozzle, and the ignition nozzle, the reaction nozzle and the protection nozzle are arranged alternately.

[0009] In this scheme, the nozzle includes an ignition nozzle, a reaction nozzle and a protection nozzle. The ignition nozzle can achieve rapid mixing of raw materials and shorten the engine starting time. The reaction nozzle serves as the main channel for the reaction raw materials. The protection nozzle can adjust the reaction temperature to avoid ablation. By setting three types of nozzles, namely, the ignition nozzle, the reaction nozzle and the protection nozzle, and arranging the three nozzles in an staggered manner, the sprayed liquid can be more dispersed, so that the reaction in the combustion chamber can be more complete, further improving the propulsion effect of the ramjet engine injection device and increasing the service life of the equipment.

[0010] Preferably, the diameters of the reaction nozzle, the ignition nozzle and the protection nozzle decrease in sequence.

[0011] In this scheme, the reaction nozzle is the main channel for the reaction raw materials, so the diameter of the reaction nozzle is relatively large to allow most of the raw materials to pass through, the diameter of the ignition nozzle is second, which is conducive to the rapid mixing of the raw materials, and the diameter of the protection nozzle is the smallest, and the atomization particle size is also the smallest, which is conducive to the liquid evaporation heat absorption and temperature control. By reducing the diameters of the reaction nozzle, ignition nozzle and protection nozzle in sequence, the reaction in the combustion chamber is more complete, further improving the propulsion effect of the ramjet injection device, and also increasing the service life of the equipment.

[0012] Preferably, angles between the ignition nozzle, the reaction nozzle and the protection nozzle and the injection direction of the gas injection port decrease in sequence.

[0013] In this solution, the angle between the ignition nozzle and the injection direction of the gas injection port is the largest, which is conducive to the rapid contact, mixing and reaction of the reactants and the liquid, so as to achieve ignition as soon as possible. The reaction nozzle is the main nozzle, and the largest amount of raw materials are ejected from the reaction nozzle. The angle between the reaction nozzle and the injection direction of the gas injection port is the second largest, which is conducive to the reaction of the raw materials. The angle between the protection nozzle and the injection direction of the gas injection port is the smallest. The reaction time of the reactants and the liquid is the longest. It is located at the periphery of the reaction area to achieve a cooling effect and avoid ablation. By gradually decreasing the angles between the reaction nozzle, the ignition nozzle and the protection nozzle and the injection direction of the gas injection port, the reaction in the combustion chamber is made more sufficient, further improving the propulsion effect of the ramjet injection device and also extending the service life of the equipment in use.

[0014] Preferably, the injection speeds of the ignition nozzle, the reaction nozzle and the protection nozzle decrease in sequence.

[0015] The greater the injection speed, the more conducive it is to the rapid mixing of the reactants and the liquid, and the faster the reaction. The injection speed of the ignition nozzle is the largest, which is conducive to rapid reaction to achieve ignition as soon as possible. The injection speed of the reaction nozzle is the second largest, which is conducive to the reaction of most of the raw materials. The injection speed of the protection nozzle is the smallest, which prolongs the reaction time, thus being more conducive to achieving the cooling effect and avoiding ablation. By gradually decreasing the injection speeds of the ignition nozzle, the reaction nozzle and the protection nozzle, the reaction in the combustion chamber is made more sufficient, further improving the propulsion effect of the ramjet injection device and also extending the service life of the equipment in use.

[0016] Preferably, the diameter of the gas injection port is D, and the diameter of the nozzle is d, where 4 < D / d < 50.

[0017] By setting the diameters of the gas injection port D and the nozzle d within the range of 4 < D / d < 50, the diameter of the gas injection port is more suitable for the injection of reactants, the diameter of the nozzle is more suitable for the injection of liquid, and the ratio of the reactants and the liquid is more appropriate, further improving the propulsion effect of the ramjet injection device and also extending the service life of the equipment in use.

[0018] Preferably, the angle range between the injection direction of the nozzle and the injection direction of the gas injection port is 15 - 75°.

[0019] By setting the angle range between the injection direction of the nozzle and the injection direction of the gas injection port within 15 - 75°, it is more conducive to the reaction of the reactants and the liquid, further improving the propulsion effect of the ramjet injection device and also extending the service life of the equipment in use.

[0020] Preferably, the range of the injection speed of the nozzle is 5 - 200 m / s.

[0021] By setting the nozzle injection speed range to 5-200 m / s, it is more conducive to the reaction between the reactants and the liquid, further improving the propulsion effect of the ramjet engine injection device and increasing the service life of the equipment.

[0022] Preferably, the number of the nozzles ranges from 6 to 32.

[0023] By setting the number of nozzles to a range of 6-32, the number of nozzles is more suitable for the liquid injection requirements, which is more conducive to the reaction between the reactants and the liquid, further improving the propulsion effect of the ramjet engine injection device and increasing the service life of the equipment.

[0024] Preferably, the plurality of nozzles are evenly spaced apart along the circumference of the gas injection port.

[0025] By arranging the nozzles at even intervals along the circumference of the gas injection port, the nozzles can evenly spray liquid around the circumference of the gas injection port, making the reaction more complete and further improving the propulsion effect of the ramjet engine injection device.

[0026] The positive and progressive effects of the present invention are:

[0027] The present invention provides a ramjet injection device, which includes a combustion chamber and a nozzle connected to the combustion chamber, a gas injection port and a liquid injector are provided at one end of the combustion chamber away from the nozzle, the gas injection port is used to inject reactants into the combustion chamber, the reactants are high-energy particles and combustible gas, the liquid injector is arranged on the circumferential outer side of the gas injection port, and the liquid injector includes a plurality of nozzles, the nozzles are used to inject liquid that can react with the reactants into the combustion chamber, the reactants react with the liquid in the combustion chamber, and then are ejected from the nozzle connected to the combustion chamber, thereby generating thrust. By arranging a plurality of nozzles, the injected liquid is more dispersed, so that the reaction in the combustion chamber is more sufficient, the high-energy particles are avoided from agglomerating, and the high-energy particles can be fully burned, thereby improving the injection efficiency of the ramjet injection device, and also making the high-temperature area generated by the reaction reasonably distributed, avoiding equipment damage, and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a ramjet injection device according to an embodiment of the present invention.

[0029] Figure 2 It is a side elevation view of a ramjet injection device according to an embodiment of the present invention.

[0030] Figure 3 FIG. 4 is a cross-sectional view of an ignition nozzle according to an embodiment of the present invention.

[0031] Figure 4FIG. 4 is a cross-sectional view of a reaction nozzle according to an embodiment of the present invention.

[0032] Figure 5 FIG. 4 is a cross-sectional view of a protective nozzle according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] Ramjet injection device 100

[0035] Combustion Chamber 200

[0036] Nozzle 300

[0037] Gas injection port 400

[0038] Liquid Injector 500

[0039] Nozzle 510

[0040] Nozzle inlet 511

[0041] Nozzle outlet 512

[0042] Nozzle side wall 513

[0043] Stabilizing unit 514

[0044] Ignition nozzle 520

[0045] Reaction nozzle 530

[0046] Protective nozzle 540 DETAILED DESCRIPTION

[0047] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0048] like Figure 1 and Figure 2 As shown, the present invention provides a ramjet engine injection device 100, which includes a combustion chamber 200 and a nozzle 300 connected to the combustion chamber 200. A gas injection port 400 and a liquid injector 500 are provided at one end of the combustion chamber 200 away from the nozzle 300. The gas injection port 400 is used to inject reactants into the combustion chamber 200. The reactants are high-energy particles and combustible gas. The combustible gas is mainly composed of hydrogen, carbon monoxide and a small amount of inert gas. The high-energy particles are mainly composed of one or more of aluminum, magnesium, boron, potassium, iron, carbon or its hydride.

[0049] The liquid injector 500 is arranged on the circumferential outer side of the gas injection port 400. The liquid injector 500 includes a plurality of nozzles 510. The nozzles 510 are used to inject liquid that can react with reactants into the combustion chamber 200. The nozzles 510 are used to inject liquid that can react with reactants into the combustion chamber 200. The reactants react with the liquid in the combustion chamber 200 and then are ejected from the nozzle 300 connected to the combustion chamber 200, thereby generating thrust. By providing a plurality of nozzles 510, the injected liquid is more dispersed, so that the reaction in the combustion chamber 200 is more complete, the high-energy particles are prevented from agglomerating, and the high-energy particles can be fully burned, thereby improving the injection efficiency of the ramjet injection device 100, and the high-temperature area generated by the reaction can be reasonably distributed, thereby avoiding equipment damage and increasing the service life.

[0050] In this embodiment, a plurality of nozzles 510 are evenly spaced along the circumference of the gas injection port 400, so that the nozzles 510 can evenly spray liquid around the gas injection port 400, making the reaction more complete and further improving the propulsion effect of the ramjet injection device 100. In other embodiments, those skilled in the art can select the arrangement of the nozzles 510 according to actual needs.

[0051] like Figure 3-Figure 5 As shown, the nozzle 510 includes an ignition nozzle 520, a reaction nozzle 530 and a protection nozzle 540, and the ignition nozzle 520, the reaction nozzle 530 and the protection nozzle 540 are arranged in a staggered manner. The ignition nozzle 520 can achieve rapid mixing of raw materials and shorten the engine start-up time. The reaction nozzle 530 serves as the main channel for the reaction raw materials. The protection nozzle 540 can adjust the reaction temperature to avoid ablation. By setting the three types of nozzles 510, namely, the ignition nozzle 520, the reaction nozzle 530 and the protection nozzle 540, and staggering the three types of nozzles 510, the injected liquid is more dispersed, so that the reaction in the combustion chamber 200 is more sufficient, further improving the propulsion effect of the ramjet injection device 100, and also improving the service life of the equipment.

[0052] In this embodiment, the nozzle 510 includes an ignition nozzle 520, a reaction nozzle 530, and a protection nozzle 540. In other embodiments, the nozzle 510 may also include only at least one of the ignition nozzle 520, the reaction nozzle 530, and the protection nozzle 540, and those skilled in the art may select according to actual needs.

[0053] The nozzle 510 includes a nozzle inlet 511, a nozzle outlet 512, and a nozzle side wall 513. Liquid enters from the nozzle inlet 511 and is ejected from the nozzle outlet 512. Figure 3 As shown, the ignition nozzle 520 is provided with a stabilizing portion 514 on the nozzle side wall 513 near the nozzle outlet 512, so as to make the ejected liquid more stable. Figure 4 As shown, the diameter of the nozzle side wall 513 of the reaction nozzle 530 gradually decreases near the nozzle outlet 512, so that the liquid sprayed from the reaction nozzle 530 is more concentrated, which is more conducive to the reaction. Figure 5 As shown, the diameter of the nozzle side wall 513 of the protection nozzle 540 gradually increases near the nozzle outlet 512, so that the liquid sprayed from the protection nozzle 540 can be more dispersed, and the liquid sprayed from the protection nozzle 540 can be more easily evaporated, heat absorbed and controlled, and better protect the device, further improving the propulsion effect of the ramjet injection device 100, and also improving the service life of the device. In other embodiments, those skilled in the art can select a suitable shape of the nozzle side wall 513 according to actual needs.

[0054] The diameters of the reaction nozzle 530, the ignition nozzle 520 and the protection nozzle 540 decrease in sequence. The reaction nozzle 530 is the main passage for the reaction raw materials, so the diameter of the reaction nozzle 530 is relatively large so that most of the raw materials can pass through. The diameter of the ignition nozzle 520 is second, which is conducive to the rapid mixing of the raw materials. The diameter of the protection nozzle 540 is the smallest, and the atomized particle size is also the smallest, which is conducive to the liquid evaporation heat absorption temperature control. By reducing the diameters of the reaction nozzle 530, the ignition nozzle 520 and the protection nozzle 540 in sequence, the reaction in the combustion chamber 200 is more sufficient, the propulsion effect of the ramjet injection device 100 is further improved, and the service life of the equipment is also improved.

[0055] The angles of the ignition nozzle 520, the reaction nozzle 530 and the protection nozzle 540 with the injection direction of the gas injection port 400 are reduced in sequence. The angle of the injection direction of the ignition nozzle 520 and the gas injection port 400 is the largest, which is conducive to the rapid contact, mixing and reaction of the reactant and the liquid, so as to ignite as soon as possible. The reaction nozzle 530 is the main nozzle 510, and the largest amount of raw materials are ejected from the reaction nozzle 530. The angle of the injection direction of the reaction nozzle 530 and the gas injection port 400 is second, which is conducive to the reaction of the raw materials. The angle of the injection direction of the protection nozzle 540 and the gas injection port 400 is the smallest, and the reactant and the liquid react for the longest time. It is located at the periphery of the reaction area, achieving a cooling effect and avoiding ablation. By reducing the angles of the injection direction of the reaction nozzle 530, the ignition nozzle 520 and the protection nozzle 540 with the gas injection port 400 in sequence, the reaction in the combustion chamber 200 is more sufficient, further improving the propulsion effect of the ramjet injection device 100, and also improving the service life of the equipment.

[0056] The injection speeds of the ignition nozzle 520, the reaction nozzle 530, and the protection nozzle 540 decrease in sequence. The greater the injection speed, the more conducive it is to the rapid mixing of reactants and liquid, accelerating the reaction. The injection speed of the ignition nozzle 520 is the largest, which is conducive to a rapid reaction to enable ignition as soon as possible. The injection speed of the reaction nozzle 530 is the second largest, which is conducive to the reaction of most raw materials. The injection speed of the protection nozzle 540 is the smallest, which prolongs the reaction time, thus being more conducive to achieving a cooling effect and avoiding ablation. By decreasing the injection speeds of the ignition nozzle 520, the reaction nozzle 530, and the protection nozzle 540 in sequence, the reaction in the combustion chamber 200 becomes more sufficient, further enhancing the propulsion effect of the ramjet injection device 100 and also increasing the service life of the equipment in use.

[0057] The diameter of the gas injection port 400 is D, and the diameter of the nozzle 510 is d, where 4 < D / d < 50. By setting the diameters of the gas injection port 400 and the nozzle 510 within the range of 4 < D / d < 50, the diameter of the gas injection port 400 is more suitable for the injection of reactants, the diameter of the nozzle 510 is more suitable for the injection of liquid, the ratio of reactants and liquid is more appropriate, further enhancing the propulsion effect of the ramjet injection device 100 and also increasing the service life of the equipment in use.

[0058] The angle range between the injection direction of the nozzle 510 and the injection direction of the gas injection port 400 is 15 - 75°. By setting the angle range between the injection direction of the nozzle 510 and the injection direction of the gas injection port 400 within 15 - 75°, it is more conducive to the reaction of reactants and liquid, further enhancing the propulsion effect of the ramjet injection device 100 and also increasing the service life of the equipment in use.

[0059] The range of the injection speed of the nozzle 510 is 5 - 200 m / s. By setting the range of the injection speed of the nozzle 510 within 5 - 200 m / s, it is more conducive to the reaction of reactants and liquid, further enhancing the propulsion effect of the ramjet injection device 100 and also increasing the service life of the equipment in use.

[0060] The number range of the nozzles 510 is 6 - 32. By setting the number range of the nozzles 510 to 6 - 32, the number range of the nozzles 510 is more suitable for the injection requirements of the liquid, thus being more conducive to the reaction of reactants and liquid, further enhancing the propulsion effect of the ramjet injection device 100 and also increasing the service life of the equipment in use.

[0061] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship of the device or element in normal use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation at any time, and therefore cannot be understood as a limitation of the present invention in this regard.

[0062] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A ramjet injection device, characterized in that: The ramjet engine injection device includes a combustion chamber and a nozzle connected to the combustion chamber. A gas injection port and a liquid injector are provided at one end of the combustion chamber away from the nozzle. The gas injection port is used to inject reactants into the combustion chamber. The liquid injector is arranged on the circumferential outer side of the gas injection port. The liquid injector includes a plurality of nozzles, and the nozzles are used to inject a liquid that can react with the reactants into the combustion chamber.

2. The ramjet injection device according to claim 1, characterized in that: The nozzles include an ignition nozzle, a reaction nozzle and a protection nozzle, and the ignition nozzle, the reaction nozzle and the protection nozzle are arranged alternately.

3. The ramjet injection device according to claim 2, characterized in that: The diameters of the reaction nozzle, the ignition nozzle and the protection nozzle decrease in sequence.

4. The ramjet injection device according to claim 2, characterized in that: The angles between the ignition nozzle, the reaction nozzle, the protection nozzle and the injection direction of the gas injection port decrease in sequence.

5. The ramjet injection device according to claim 2, characterized in that: The injection speeds of the ignition nozzle, the reaction nozzle and the protection nozzle decrease in sequence.

6. The ramjet injection device according to any one of claims 1 to 5, characterized in that: The diameter of the gas injection port is D, the diameter of the nozzle is d, <D / d<50。 7. The ramjet injection device according to any one of claims 1 to 5, characterized in that: The angle between the injection direction of the nozzle and the injection direction of the gas injection port is in the range of 15-75°.

8. The ramjet injection device according to any one of claims 1 to 5, characterized in that: The spray velocity of the nozzle is in the range of 5-200 m / s.

9. The ramjet injection device according to any one of claims 1 to 5, characterized in that: The number of the nozzles ranges from 6 to 32.

10. The ramjet injection device according to any one of claims 1 to 5, characterized in that: The plurality of nozzles are evenly spaced apart along the circumference of the gas injection port.

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