Injection device of ramjet

Abstract

The utility model discloses an injection 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 utility model relates to the technical field of ramjet generators, in particular to a ramjet engine injection device. Background Art

[0002] With the advancement of naval navigation technology, conventional underwater vehicles such as torpedoes have lost increasingly smaller speed advantages over ships, their combat effectiveness has been weakened, and this has severely restricted their further development. Therefore, future naval battles will place higher demands on the speed and range of torpedoes, and there is an urgent need to significantly improve the performance of torpedo propulsion systems. In existing technologies, using a water ramjet as a propulsion device for torpedoes can effectively improve propulsion. A water ramjet is an engine that uses an environmental substance such as water as an oxidant, and the capture of the oxidant is achieved through high-speed ramjet action. Since there is no need to carry a large amount of oxidant, this power system greatly improves the engine's energy density.

[0003] There are two main types of water ramjets: the powder-type water ramjets and the powder-type water ramjets. Powder-type water ramjets carry metal powder as fuel and use water introduced into the engine as an oxidizer, resulting in a higher energy density. However, starting and sustaining the reaction between the metal powder and water presents significant difficulties. Taking aluminum powder as an example, during the combustion process, aluminum powder particles agglomerate, and the burned surface generates aluminum oxide particles that further encapsulate the aluminum powder, resulting in incomplete combustion. Furthermore, key issues remain regarding how to regulate the flame generated by the aluminum-water reaction to achieve a reasonable distribution of high-temperature areas and avoid damage to the engine injectors and combustion chamber. In practice, high-performance injectors are urgently needed to ensure the long-life, efficient, and stable operation of water ramjets. Utility Model Content

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

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model 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 outside of the gas injection port. The liquid injector includes a plurality of nozzles, and the nozzles are used to inject a liquid capable of reacting with the reactants into the combustion chamber.

[0007] In this solution, a gas jet and a liquid injector are provided at the end of the combustion chamber away from the nozzle. The gas jet is used to inject reactants, which are high-energy particles and combustible gas, into the combustion chamber. The liquid injector is located circumferentially outside the gas jet and includes multiple nozzles. These nozzles are used to inject a liquid capable of reacting with the reactants into the combustion chamber. The reactants and liquid react in the combustion chamber before being ejected from the nozzle connected to the combustion chamber, generating thrust. The multiple nozzles provide a more dispersed injection of the liquid, resulting in a more complete reaction within the combustion chamber, preventing high-energy particle agglomeration and ensuring full combustion. This improves the injection efficiency of the ramjet's injection device and rationally distributes the high-temperature areas generated by the reaction, preventing damage to the equipment and increasing its service life.

[0008] Preferably, the nozzle includes an ignition nozzle, a reaction nozzle and a protection nozzle, and the ignition nozzle, the reaction nozzle and the protection nozzle are arranged in a staggered manner.

[0009] In this solution, 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 start-up time. The reaction nozzle serves as the main channel for the reaction raw materials. The protection nozzle can regulate the reaction temperature and 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, thereby making the reaction in the combustion chamber more sufficient, further improving the propulsion effect of the ramjet engine injection device, and also 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 solution, the reaction nozzle serves as the primary channel for the reactants. Therefore, its diameter is relatively large to allow for the majority of the material to pass through. The ignition nozzle, with its smaller diameter, facilitates rapid mixing of the materials. The shield nozzle, with its smallest diameter, minimizes the atomized particle size, facilitating heat absorption and temperature control during liquid evaporation. By sequentially reducing the diameters of the reaction, ignition, and shield nozzles, the reaction within the combustion chamber is more complete, further enhancing the propulsion efficiency of the ramjet injection system and extending the service life of the equipment.

[0012] Preferably, angles between the ignition nozzle, the reaction nozzle, 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, and 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 becomes more sufficient, further improving the propulsion effect of the ramjet injection device and also increasing 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 acceleration of 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, making it 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 becomes more sufficient, further improving the propulsion effect of the ramjet injection device and also increasing 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 the 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 increasing 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 increasing 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's injection velocity 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 progress effect of this utility model is:

[0027] The utility model provides a ramjet injection device, comprising 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, which are high-energy particles and combustible gas, into the combustion chamber. The liquid injector is provided circumferentially outside the gas injection port. The liquid injector includes multiple nozzles, which are used to inject a liquid capable of reacting with the reactants into the combustion chamber. The reactants and the liquid react in the combustion chamber and are then ejected from the nozzle connected to the combustion chamber, thereby generating thrust. By providing multiple nozzles, the injected liquid is more dispersed, thereby ensuring a more complete reaction in the combustion chamber, preventing agglomeration of high-energy particles, and ensuring complete combustion of the high-energy particles. This improves the injection efficiency of the ramjet injection device and also rationally distributes the high-temperature areas generated by the reaction, thereby preventing equipment damage and increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of a ramjet injection device according to one embodiment of the present utility model.

[0029] Figure 2 It is a side view of a ramjet injection device according to one 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 4 4 is a cross-sectional view of a reaction nozzle according to an embodiment of the present invention.

[0032] Figure 5 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 portion 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 mainly consists of hydrogen, carbon monoxide and a small amount of inert gas. The high-energy particles mainly consist of one or more of aluminum, magnesium, boron, potassium, iron, carbon or its hydride.

[0049] The liquid injector 500 is disposed circumferentially outside the gas injection port 400 and includes multiple nozzles 510. The nozzles 510 are used to inject a liquid capable of reacting with the reactants into the combustion chamber 200. The reactants and liquid react within the combustion chamber 200 before being ejected from the nozzle 300 connected to the combustion chamber 200, thereby generating thrust. The provision of multiple nozzles 510 allows for greater dispersion of the injected liquid, resulting in a more complete reaction within the combustion chamber 200 and preventing high-energy particle agglomeration, allowing for full combustion of the high-energy particles. This improves the injection efficiency of the ramjet injection device 100 and rationally distributes the high-temperature regions generated by the reaction, preventing equipment damage and increasing service life.

[0050] In this embodiment, multiple 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 circumference of 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, which are arranged in a staggered manner. The ignition nozzle 520 can achieve rapid mixing of raw materials, shortening engine startup time. The reaction nozzle 530 serves as the main channel for the reaction raw materials, and the protection nozzle 540 can regulate the reaction temperature to prevent ablation. By providing the ignition nozzle 520, the reaction nozzle 530, and the protection nozzle 540, and staggering the three nozzles 510, the injected liquid is more dispersed, thereby ensuring a more complete reaction in the combustion chamber 200, further improving the propulsion effect of the ramjet injection device 100 and extending 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 include only at least one of the ignition nozzle 520, the reaction nozzle 530, and the protection nozzle 540. Those skilled in the art may select the nozzle 510 according to actual needs.

[0053] The nozzle 510 includes a nozzle inlet 511, a nozzle outlet 512 and a nozzle sidewall 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 nozzle sidewall 513 of the protective nozzle 540 gradually increases in diameter near the nozzle outlet 512, thereby making the liquid sprayed from the protective nozzle 540 more dispersed, allowing the liquid to evaporate more easily and absorb heat to control temperature, thereby better protecting the device. This further enhances the propulsion efficiency of the ramjet injection device 100 and increases the service life of the device. In other embodiments, those skilled in the art may select an appropriate shape of the nozzle sidewall 513 according to actual needs.

[0054] The diameters of the reaction nozzle 530, ignition nozzle 520, and shield nozzle 540 decrease in sequence. The reaction nozzle 530 serves as the primary channel for the reactants, so its diameter is larger to allow for the majority of the reactants to pass through. The ignition nozzle 520 has a smaller diameter, facilitating rapid mixing of the reactants. The shield nozzle 540 has the smallest diameter, resulting in the smallest atomized particle size, facilitating heat absorption and temperature control during liquid evaporation. By sequentially decreasing the diameters of the reaction nozzle 530, ignition nozzle 520, and shield nozzle 540, the reaction within the combustion chamber 200 is more complete, further enhancing the propulsion efficiency of the ramjet injection device 100 and increasing the service life of the equipment.

[0055] The injection angles of the ignition nozzle 520, reaction nozzle 530, and shield nozzle 540 relative to the gas injection port 400 decrease in sequence. The ignition nozzle 520 has the largest injection angle relative to the gas injection port 400, facilitating rapid contact, mixing, and reaction between the reactants and the liquid, thereby igniting as quickly as possible. The reaction nozzle 530 is the main nozzle 510, from which the largest amount of raw materials is ejected. The injection angle between the reaction nozzle 530 and the gas injection port 400 is the second largest, thus facilitating raw material reaction. The shield nozzle 540 has the smallest injection angle relative to the gas injection port 400, allowing the reactants to react with the liquid for the longest time. This position allows the shield nozzle 540 to be positioned at the periphery of the reaction zone, achieving a cooling effect and preventing ablation. By sequentially decreasing the injection angles of the reaction nozzle 530, ignition nozzle 520, and shield nozzle 540 relative to the gas injection port 400, the reaction within the combustion chamber 200 is more complete, further enhancing the propulsion efficiency of the ramjet injection device 100 and increasing 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, which is conducive to the reaction of most raw materials. The injection speed of the protection nozzle 540 is the smallest, prolonging the reaction time, thereby being more conducive to achieving the 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, thereby 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 should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship of the device or component during normal use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation at any time. Therefore, they should not be understood as limiting the present invention in this regard.

[0062] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection 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, and such changes and modifications are intended to fall within the scope of protection 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 provided on the circumferential outside of the gas injection port. The liquid injector includes a plurality of nozzles, and the nozzles are used to inject a liquid capable of reacting 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, wherein: 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, wherein: 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, wherein: 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, 4 <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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