CN108871060B - Emission system with functions of inhibiting peripheral and high-order jet flow noise by water spraying - Google Patents
Emission system with functions of inhibiting peripheral and high-order jet flow noise by water spraying Download PDFInfo
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- CN108871060B CN108871060B CN201810697636.4A CN201810697636A CN108871060B CN 108871060 B CN108871060 B CN 108871060B CN 201810697636 A CN201810697636 A CN 201810697636A CN 108871060 B CN108871060 B CN 108871060B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F3/00—Rocket or torpedo launchers
- F41F3/04—Rocket or torpedo launchers for rockets
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Abstract
A launching system with functions of water spray inhibition of periphery and high-order jet flow noise comprises a primary periphery water spray noise reduction system and a secondary high-order water spray noise reduction system; the primary peripheral water spraying and noise reducing system can spray water from the circumferential side wall of the emission platform body to the periphery, and inhibit the high-sound strong jet flow noise of the back splash which flows downwards through the guide groove of the emission platform body; the second-level high-level water spraying and noise reducing system is arranged at the periphery of the launching platform body, is in a high-level water spraying mode, and can spray water to the outlet of the diversion trench from the outer side to form a second-level peripheral water spraying water curtain to inhibit high-sound strong jet flow noise reflected by the outlet of the diversion trench; and meanwhile, the secondary high-level water spraying noise reduction system can spray water to the central area of the platform body of the launching platform to form a secondary internal water spraying water curtain. The invention can effectively reduce the strength of rocket launching jet flow noise, and inhibit high-sound strong jet flow noise reflected upwards by an open space between the lower part of the launching platform body and the inlet of the diversion trench and peripheral noise formed by gas flow ejected from the outlet of the diversion trench.
Description
Technical Field
The invention relates to an emission system with functions of inhibiting peripheral and high-order jet flow noise by water spraying, and belongs to the technical field of aerospace emission heat protection.
Background
The water spraying technology is adopted in the rocket launching process, so that jet flow noise can be effectively controlled, and a launching platform and a diversion facility can be effectively protected.
At present, a water spraying, cooling and noise reducing system is built by using a truss at the periphery of a launching platform mainly depending on a launching platform structure, a rocket sprays water to the surface of a platform body by using a nozzle after taking off, the circumferential cooling and noise reducing functions of the platform body and the platform body are realized, but the cooling and noise reducing effect cannot radiate to the peripheral space of the platform body. In the large rocket launching process, even if the structure is adopted for noise reduction, the flow velocity and the sound pressure of the fuel gas flow which flows downwards through the launching platform guide hole and flows in the guide groove are still high, the peripheral noise formed by the fuel gas flow which is sprayed out from the guide groove outlet is still strong, and strong influence is continuously exerted on the rocket and the launching system.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the launching system with the function of spraying water to inhibit peripheral and high-level jet flow noise is provided, the strength of rocket launching jet flow noise is reduced, and high-sound-intensity jet flow noise reflected upwards through an open space between the lower part of a launching platform body and an inlet of a diversion trench and peripheral noise formed by gas flow ejected from an outlet of the diversion trench are inhibited.
The technical solution of the invention is as follows: the launching system with the functions of spraying water and inhibiting periphery and high-level jet noise comprises a primary periphery water spraying noise reduction system and a secondary high-level water spraying noise reduction system; the primary peripheral water spraying and noise reducing system can spray water from the circumferential side wall of the emission platform body to the periphery, and high-sound strong jet flow noise of back splashing flowing downwards through the emission platform body diversion trench is inhibited; the second-level high-level water spraying and noise reducing system is arranged at the periphery of the launching platform body, is in a high-level water spraying mode, and can spray water to the outlet of the diversion trench from the outside to form a second-level peripheral water spraying water curtain so as to inhibit high-sound strong jet flow noise reflected by the outlet of the diversion trench; and meanwhile, the secondary high-level water spraying noise reduction system can spray water to the central area of the platform body of the launching platform to form a secondary internal water spraying water curtain.
The peripheral frame of the launching platform body is of a hollow structure, the hollow structure is communicated with an external water supply pipeline to form a built-in water spray pipeline, a primary peripheral nozzle array is processed on the peripheral side wall of the launching platform body, and nozzles in the primary peripheral nozzle array are communicated with the built-in water spray pipeline to form a primary peripheral water spray noise reduction system.
And externally hanging water spraying pipelines on the peripheral side wall of the launching platform body, wherein the water spraying pipelines are communicated with an external water supply pipeline, a primary peripheral nozzle array is processed at the periphery of each water spraying pipeline, and nozzles in the primary peripheral nozzle array are communicated with the externally hanging water spraying pipelines to form a primary peripheral water spraying noise reduction system.
The nozzle opening is downward, and the contained angle of water flow direction and horizontal direction in the nozzle is 0 ~ 90.
The nozzle is a non-convex structure or a convex structure.
The second-level water spraying and noise reducing system comprises a main water pipe, a water feeding pipe, a second-level water reservoir, a second-level inner side nozzle array and a second-level outer side nozzle array;
the water flow from the external water supply pipeline enters from the main water pipe, sequentially passes through the water supply pipe and the secondary water storage device, and is sprayed out from the secondary inner side nozzle array and the secondary outer side nozzle array;
the secondary inner side nozzle array sprays water to the central area of the platform body of the launching platform to form a secondary inner water spraying water curtain; the second-stage outer side nozzle array sprays water to the outlet of the flow guide groove to form a second-stage peripheral water spraying water curtain.
The nozzles in the second-stage inner nozzle array and the second-stage outer nozzle array are designed together, and the structural types of the nozzles are communicated double-side nozzles, T-shaped double-side nozzles or staggered double-row double-side nozzles.
The distance between the secondary inner side nozzle array and the secondary outer side nozzle array is 3-15m from the upper surface of the launching platform body.
The launching platform body is provided with a supporting frame and a flow guide hole for discharging and guiding gas flow, the supporting frame is processed into a hollow structure which is communicated with each other to form a built-in flow passage, and the built-in flow passage is communicated with an external water supply pipeline and is used as a cooling water flow passage and a water supply channel of the launching platform; the upper surface of the supporting frame and the side wall facing the diversion hole are provided with a water spray hole array communicated with the built-in flow channel;
the peripheral frame of the launching platform body is of a hollow structure and is communicated with the built-in runner, and a water spraying device array communicated with the built-in runner is processed on the upper surface of the peripheral frame of the launching platform body.
The water spray hole array on the upper surface of the supporting frame is composed of a plurality of built-in non-convex water spray holes; the supporting frame is provided with a plurality of built-in water spraying holes facing the side wall of the diversion hole, and each built-in water spraying hole is in a convex form or a non-convex form;
the water spraying device arrays on the upper surfaces of the peripheral frames of the launching platform body adopt a high-position water spraying mode to spray water to the upper surface of the launching platform body.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention forms a primary peripheral water spraying and noise reducing system on the circumferential side wall of the transmitting platform body, which is used for spraying water to the periphery, and effectively inhibits the high-sound strong jet flow noise which is reflected upwards by the open space between the lower part of the transmitting platform body and the inlet of the diversion trench.
(2) According to the invention, the secondary high-level water spraying and noise reducing system is arranged on the periphery of the launching platform body, water can be sprayed from the outer side to the outlet of the diversion trench, and a secondary peripheral water spraying water curtain is formed, so that peripheral noise formed by gas flow sprayed from the outlet of the diversion trench is effectively inhibited.
(3) The second-level water spraying noise reduction system is in a high-level water spraying mode, the height of a nozzle is 3-15m away from the upper surface of the launching platform body, and the high-level noise generated by the rocket body gas flow which moves upwards continuously can be effectively inhibited.
Drawings
FIG. 1 is a front view of a launching system of the present invention;
FIG. 2 is a top view of the launching system of the present invention;
FIG. 3 is a schematic diagram of the peripheral pipes and the inner flow channels of the nozzles in the primary peripheral water spray noise reduction system;
FIG. 4 is a schematic cross-sectional view of a water spray pipe and a nozzle of the water spray noise reduction system, wherein (a) is a schematic view of a built-in water spray pipe and a protruding nozzle, (b) is a schematic view of an external water spray pipe and a protruding nozzle, (c) is a schematic view of a built-in water spray pipe and a non-protruding nozzle, and (d) is a schematic view of a built-in water spray pipe and a non-protruding nozzle;
FIG. 5 is a schematic view of the nozzle pattern in the secondary inboard nozzle array and the secondary outboard nozzle array;
fig. 6 is a schematic view of the upper surface of the launch pad.
Detailed Description
The invention aims to develop a launching system with a function of inhibiting peripheral high-order jet flow noise by spraying water. A primary peripheral water spraying and noise reducing system for spraying water to the periphery is designed on a platform body of the launching platform, and a secondary high-level water spraying and noise reducing system is designed around the launching platform, so that the noise intensity of the rocket launching jet flow is reduced, and the jet flow noise source area which is discharged and splashed downwards through a diversion hole of the launching platform and the peripheral noise influence range formed by the gas flow sprayed out of a diversion trench outlet are inhibited.
As shown in fig. 1 and 2, the primary peripheral water spray noise reduction system can spray water from the circumferential side wall of the launching platform body 1 to the periphery, and suppress the high-sound strong jet flow noise of the downward-flowing back splash through the diversion trench 3 of the launching platform body 1.
The primary peripheral water spray noise reduction system has two realization modes. One implementation is as follows: the peripheral frame of the launching platform body 1 is a hollow structure, the hollow structure is communicated with an external water supply pipeline to form a built-in water spray pipeline 15, a primary peripheral nozzle array 4 is processed on the peripheral side wall of the launching platform body 1, and nozzles in the primary peripheral nozzle array 4 are communicated with the built-in water spray pipeline 15 to form a primary peripheral water spray noise reduction system. FIG. 3 is a schematic diagram of the peripheral pipes and the inner flow channels of the nozzles in the primary peripheral water spray noise reduction system.
The other realization mode is that an external water spraying pipeline 16 is arranged on the peripheral side wall of the launching platform body 1, the external water spraying pipeline 16 is communicated with an external water supply pipeline, a primary peripheral nozzle array 4 is processed on the periphery of the external water spraying pipeline 16, and nozzles in the primary peripheral nozzle array 4 are communicated with the external water spraying pipeline 16 to form a primary peripheral water spraying noise reduction system.
In two kinds of realization, the nozzle opening is downward, and the contained angle a of water flow direction and horizontal direction in the nozzle is 0 ~ 90. The nozzle is a non-convex structure or a convex structure.
Fig. 4 is a schematic cross-sectional view of a water spraying pipe and a nozzle of the water spray noise reduction system, wherein (a) is a schematic view of an embedded water spraying pipe and a protruding nozzle, (b) is a schematic view of an external water spraying pipe and a protruding nozzle, (c) is a schematic view of an embedded water spraying pipe and a non-protruding nozzle, and (d) is a schematic view of an external water spraying pipe and a non-protruding nozzle.
The built-in water spraying pipe 15 can be used as a part of the platform body for carrying and conveying cooling water. The external water spraying pipeline needs to build a supporting structure around the platform body for bearing the pipeline and water. The water sprayed out by the nozzles of the primary peripheral water spraying and noise reducing system forms a primary peripheral water spraying water curtain 5 of the platform body.
The high-sound strong jet flow noise reflected upwards through the open space 2 between the lower part of the table body and the inlet of the diversion trench is suppressed by the water curtain 5 sprayed at the first-level periphery of the table body.
The secondary high-level water spraying and noise reducing system is arranged at the periphery of the launching platform body 1 and is in a high-level water spraying mode, the height of a nozzle is 3-15m away from the upper surface of the launching platform body, water can be sprayed from the outer side to the outlet 10 of the diversion trench, a secondary peripheral water spraying water curtain 9 is formed, and high-sound strong jet flow noise reflected by the outlet of the diversion trench is inhibited; meanwhile, the second-level water spraying noise reduction system can spray water to the central area of the launching platform body 1 to form a second-level internal water spraying water curtain.
The second-level high-level water spraying and noise reducing system comprises a main water pipe 12, a water feeding pipe 11, a second-level water storage device 6, a second-level inner side nozzle array 7 and a second-level outer side nozzle array 8.
Water from an external water supply pipeline enters from an inlet 13 of a main water pipe 12, sequentially passes through an upper water pipe 11 and a secondary water storage device 6, and is sprayed out from a secondary inner nozzle array 7 and a secondary outer nozzle array 8. The main water pipe, the water supply pipe and the secondary water storage device are communicated with the inner cavities of the nozzles in all the secondary inner side nozzle arrays 7 and the secondary outer side nozzle arrays 8, so that cooling water can smoothly flow out of the secondary nozzles.
The secondary inner side nozzle array 7 sprays water to the central area of the launching platform body 1 to form a secondary inner water spraying water curtain; the secondary outer nozzle array 8 sprays water to the outlet of the flow guide groove to form a secondary peripheral water spraying water curtain 9.
The nozzles in the secondary inner nozzle array 7 and the secondary outer nozzle array 8 are designed together, and the structural types are a communication type double-side nozzle 17, a T-shaped double-side nozzle 18 or a staggered double-row double-side nozzle 19. As shown in fig. 5.
The second-level water spraying noise reduction system not only can spray water to the gas flow of the launching center area in sequence by means of a time sequence and a rocket launching height to inhibit high-sound strong jet flow noise, but also can inhibit the high-sound strong jet flow noise reflected by the outlets of the diversion trenches by additionally arranging a certain number of nozzle arrays which spray water to the outlets of the diversion trenches on the periphery in a reverse direction.
In addition, a series of water spray holes are arranged on the launching platform body while peripheral and high-position jet flow noise is suppressed, so that the launching platform is cooled and denoised. The specific design is as follows: as shown in fig. 6, a supporting frame 20 and a guiding hole 21 for guiding the gas flow are disposed on the launching platform body 1, the supporting frame 20 is processed into a hollow structure which is communicated with each other to form a built-in flow passage, and the built-in flow passage is communicated with an external water supply pipeline and is used as a cooling water flow passage and a water supply passage of the launching platform; the upper surface of the supporting frame 20 and the side wall facing the diversion hole 21 are provided with a water spray hole array communicated with the built-in flow channel. The peripheral frame 23 of the launching platform body 1 is of a hollow structure and is communicated with the built-in runner, and the upper surface of the peripheral frame 23 of the launching platform body 1 is provided with a water spraying device array 24 communicated with the built-in runner.
The water spray hole array on the upper surface of the supporting frame 20 is composed of a plurality of built-in water spray holes in a non-convex mode; the side wall of the support frame 20 facing the diversion holes 21 is provided with a water spray hole array which is composed of a plurality of built-in water spray holes, and each built-in water spray hole is in a convex form or a non-convex form. The water spraying device arrays 24 on the upper surface of the peripheral frame of the launching platform body 1 spray water to the upper surface of the launching platform body 1 in a high-position (0.5-2 m away from the launching platform body) water spraying mode. The water spraying direction of the water spraying device array 24 on the upper surface of the peripheral frame of the launching platform body 1 is inclined downwards, and the included angle between the water spraying direction and the horizontal direction is 0-45 degrees. The design makes full use of the interior of the platform body and the peripheral space structure thereof, the integrated function of the self frame structure of the launching platform is exerted, and the cooling and noise reduction of the platform body are realized through the multi-stage water spraying design.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (7)
1. Take emission system of water spray suppression periphery, high-order jet flow noise function, its characterized in that: comprises a primary peripheral water spray noise reduction system and a secondary high-level water spray noise reduction system; the primary peripheral water spraying and noise reducing system can spray water from the circumferential side wall of the launching platform body (1) to the periphery, and inhibit the high-sound strong jet flow noise of the back splash which is discharged through the diversion trench of the launching platform body (1); the secondary high-level water spraying noise reduction system is arranged at the periphery of the launching platform body (1), is in a high-level water spraying mode, and can spray water to the outlet of the diversion trench from the outside to form a secondary peripheral water spraying water curtain to inhibit high-sound strong jet flow noise reflected by the outlet of the diversion trench; meanwhile, the secondary high-level water spraying noise reduction system can spray water to the central area of the launching platform body (1) to form a secondary internal water spraying water curtain;
the second-level high-level water spraying and noise reducing system comprises a main water pipe (12), a water feeding pipe (11), a second-level water storage device (6), a second-level inner side nozzle array (7) and a second-level outer side nozzle array (8);
the water flow from the external water supply pipeline enters from a main water pipe (12), sequentially passes through a water supply pipe (11) and a secondary water storage device (6), and is sprayed out from a secondary inner side nozzle array (7) and a secondary outer side nozzle array (8);
the secondary inner side nozzle array (7) sprays water to the central area of the launching platform body (1) to form a secondary inner water spraying water curtain; the secondary outer side nozzle array (8) sprays water to the outlet of the guide chute to form a secondary peripheral water spraying water curtain;
the nozzles in the secondary inner nozzle array (7) and the secondary outer nozzle array (8) are designed together, and the structural types are communicated double-side nozzles, T-shaped double-side nozzles or staggered double-row double-side nozzles;
the distance between the secondary inner side nozzle array (7) and the secondary outer side nozzle array (8) and the upper surface of the launching platform body is 3-15 m.
2. The launching system with water spray suppression peripheral, high-level jet noise function as claimed in claim 1, wherein: the peripheral frame of the launching platform body (1) is of a hollow structure, the hollow structure is communicated with an external water supply pipeline to form a built-in water spraying pipeline (15), a primary peripheral nozzle array (4) is processed on the peripheral side wall of the launching platform body (1), and nozzles in the primary peripheral nozzle array (4) are communicated with the built-in water spraying pipeline (15) to form a primary peripheral water spraying noise reduction system.
3. The launching system with water spray suppression peripheral, high-level jet noise function as claimed in claim 1, wherein: external water spraying pipelines are arranged on the peripheral side wall of the launching platform body (1) and communicated with an external water supply pipeline, a primary peripheral nozzle array (4) is machined on the periphery of each water spraying pipeline, and nozzles in the primary peripheral nozzle array (4) are communicated with the external water spraying pipelines to form a primary peripheral water spraying noise reduction system.
4. The launching system with water spray suppression peripheral, high-level jet noise function as claimed in claim 2 or 3, wherein: the nozzle opening is downward, and the contained angle of water flow direction and horizontal direction in the nozzle is 0 ~ 90.
5. The launching system with water jet suppression peripheral, high-level jet noise function as claimed in claim 4, wherein: the nozzle is a non-convex structure or a convex structure.
6. The launching system with water spray suppression peripheral, high-level jet noise function as claimed in claim 1, wherein: the launching platform is characterized in that a supporting frame (20) and a guide hole (21) for discharging and guiding fuel gas flow are arranged on a platform body (1) of the launching platform, the supporting frame (20) is processed into a hollow structure which is communicated with each other to form a built-in flow passage, and the built-in flow passage is communicated with an external water supply pipeline and is used as a cooling water flow passage and a water supply passage of the launching platform; a water spray hole array communicated with the built-in flow channel is arranged on the upper surface of the supporting frame (20) and the side wall facing the diversion hole (21);
the periphery of the launching platform body (1) is of a hollow structure and is communicated with the built-in runner, and the upper surface of the periphery of the launching platform body (1) is provided with a water spraying device array communicated with the built-in runner.
7. The launching system with water jet suppression peripheral, high-level jet noise function as claimed in claim 6, wherein: the water spray hole array on the upper surface of the supporting frame (20) is composed of a plurality of built-in non-convex water spray holes; the water spray hole array arranged on the side wall of the support frame (20) facing the diversion hole (21) is composed of a plurality of built-in water spray holes, and each built-in water spray hole is in a convex form or a non-convex form;
the water spraying device arrays on the upper surfaces of the peripheral frames of the launching platform body (1) adopt a high-position water spraying mode to spray water to the upper surface of the launching platform body (1).
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| CN201810697636.4A CN108871060B (en) | 2018-06-29 | 2018-06-29 | Emission system with functions of inhibiting peripheral and high-order jet flow noise by water spraying |
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| CN201810697636.4A CN108871060B (en) | 2018-06-29 | 2018-06-29 | Emission system with functions of inhibiting peripheral and high-order jet flow noise by water spraying |
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| CN108871060B true CN108871060B (en) | 2021-03-26 |
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| CN110081580B (en) * | 2019-04-19 | 2020-09-22 | 西北工业大学 | Ventilation pipeline device with humidifying and silencing functions |
| CN110307751A (en) * | 2019-06-28 | 2019-10-08 | 南京理工大学 | A kind of tapered guiding device for multi nozzle Launch Vehicle Platform |
| CN111810315B (en) * | 2020-06-30 | 2021-08-17 | 西安航天动力试验技术研究所 | Noise absorption guiding device based on flexible water curtain |
| CN113188819B (en) * | 2021-04-12 | 2022-08-23 | 北京航天发射技术研究所 | Rocket launching water spraying noise reduction effect evaluation method |
| CN113606990B (en) * | 2021-06-29 | 2023-04-21 | 中国人民解放军63921部队 | High-level automatic water spraying and noise reducing system following rocket tail flame |
| CN114046874B (en) * | 2022-01-11 | 2022-03-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Test device for measuring supersonic jet near-field noise |
| CN114703985B (en) * | 2022-04-01 | 2023-10-31 | 广州协安建设工程有限公司 | Herringbone sound-absorbing wall structure and construction method thereof |
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| US5191162A (en) * | 1991-09-05 | 1993-03-02 | Newport News Shipbuilding And Dry Dock Company | Method and apparatus for a ship-based rocket launching structure |
| CN103090723B (en) * | 2011-10-27 | 2015-09-09 | 北京航天发射技术研究所 | Rocket launching spray cooling noise reduction system |
| CN103712522B (en) * | 2012-09-29 | 2016-03-30 | 北京航天发射技术研究所 | A kind of rocket-firing system possessing spray cooling decrease of noise functions |
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