CN114408145A - Preheating type water inlet ramjet engine structure and control method - Google Patents
Preheating type water inlet ramjet engine structure and control method Download PDFInfo
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- CN114408145A CN114408145A CN202111498009.6A CN202111498009A CN114408145A CN 114408145 A CN114408145 A CN 114408145A CN 202111498009 A CN202111498009 A CN 202111498009A CN 114408145 A CN114408145 A CN 114408145A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/12—Marine propulsion by water jets the propulsive medium being steam or other gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention provides a preheating type water inlet ramjet engine structure and a control method, wherein a shell is formed by connecting sections, the rear end of a head charge section is sequentially connected with at least one combined section, and the combined section consists of a combustion chamber section and a water inlet section connected with the rear end; the shell of the engine is hollow, and the stamping inlet water is preheated through the shell before entering the combustion chamber, so that atomization and evaporation are facilitated; the control of the power of the engine can be realized by adjusting the water inflow and the water inflow mode, so that the control of the navigational speed is realized; the engine provided by the invention can realize two typical motion states of low-speed cruising and high-speed striking in the same engine combustion chamber structure without other additional devices, effectively saves the space of an underwater vehicle, realizes integration of multiple complex functions in a small space, and improves the fighting performance and flexibility of an underwater weapon system.
Description
Technical Field
The invention belongs to the technical field of underwater vehicle power, and particularly relates to a preheating type water inlet ramjet engine structure and a control method.
Background
At present, the naval of all countries make great progress in the aspects of surface ships, submarine equipment, new concept and technology and the like. Under the current situation, the role of an underwater high-efficiency offensive weapon in a modern battlefield is increasingly important. According to the requirement of a combat scheme, an underwater offensive weapon must have the characteristics of remote tracking and short-distance rapid attack at the same time, which puts higher requirements on a power propulsion system of the underwater weapon: it is imperative to have a high energy density; long-time working capacity is required; it is necessary to have a rapid striking capability. In a traditional power system, the working time of an electric propulsion mode is long, the electric propulsion mode can sensitively change the speed of a ship to run, the tracking capability is strong, but the explosive force is insufficient, and the rapid striking task is difficult to complete. The solid fuel propulsion system has strong explosive force, but has single propulsion power, can not be adjusted, has limited fuel carrying amount and is not suitable for remote tracking. Therefore, a new power technology research is urgently needed to meet the current battle requirements.
Among various available energy sources, the high-calorific-value energy of metal fuel is valued by various countries, and particularly, part of oxidant required by the metal combustion process can be served by an aqueous medium introduced in a working environment, so that the feasibility and the convenience of the metal fuel are proved, the metal fuel is utilized in the existing weapon models, and the potential of the metal fuel is worthy of being deeply explored. However, in the existing aircraft power system, the speed is single, the speed conversion is difficult to realize, and the flexibility required by battle operation is lacked.
Disclosure of Invention
In view of the above, the invention aims to provide a structure and a control method of a preheating type water inlet ramjet engine, which combines a water-flushed high-metal content propellant engine with a high-metal content solid rocket engine aiming at different operational guidelines, adjusts the total ram water inlet amount and the water inlet distribution mode by reasonably designing a water inlet method, and meets the requirements of a system on propulsion power at different sailing speeds; meanwhile, the reaction efficiency of the metal water is improved, so that the work doing efficiency of the engine is improved. The back end of a head charge section (1) of an engine shell is sequentially connected with at least one combined section, and the tail part of the last combined section is connected with a tail combustion chamber section and then connected with a nozzle (5); wherein, the combined section consists of a combustion chamber section (2) and a water inlet section (3) connected with the rear end; the shell of the combustion chamber section (2) is of an inner-outer double-layer structure to form an annular cavity (4); the shell of the water inlet section (3) is also of an inner-outer double-layer structure to form an annular cavity with two closed ends; a channel for connecting the annular cavities (4) of the combustion chamber sections (3) at two sides is arranged in the annular cavity of the water inlet section (3), so that the annular cavities (4) at two ends are communicated;
a main water inlet (10) is arranged on the outer shell of at least one combustion chamber section (2), and the main water inlet (10) is connected with an external water inlet (9) through a water inlet control valve (8); the outer shell of the annular cavity of each water inlet section (3) is communicated to a water outlet (11) of the annular cavity (4) of the combustion chamber section (3) at the front end or the rear end through a water inlet control valve (8); a plurality of internal water inlets (12) are uniformly arranged on the inner side shell of each water inlet section (3) along the circumferential direction.
Preferably, the connection parts of the charging section (1), the combined section and the tail combustion chamber section are butted through a flange plate (7) at the end part.
Preferably, the flanges (7) are connected by bolts.
Preferably, the flanges (7) are connected by welding.
Preferably, the number of the combined segments is 1-3.
A control method of a preheated water-intake ramjet engine structure, comprising:
(1) after the water-flushing engine starts working, the explosive column (6) is ignited;
(2) opening a water inlet control valve (8) connected with an external water inlet (9);
(3) opening a water inlet control valve (8) connected to the first water inlet section (3);
(4) after a set time, opening the water inlet control valves (8) of the rear water inlet sections (3) in sequence;
or opening the water inlet control valve (8) of the selected water inlet section (3).
The invention has the following beneficial effects:
the preheating type water inlet ramjet provided by the invention breaks through the limitation of single navigational speed of the traditional underwater vehicle, and can realize the control of the power of the engine by adjusting the water inlet and the water inlet mode, thereby realizing the control of the navigational speed. The water inlet system of the ramjet has ingenious design, enters the ramjet in a preheating mode, utilizes the waste heat of fuel combustion, and improves the water inlet atomization efficiency, thereby improving the combustion efficiency of the fuel. The engine provided by the invention can realize two typical motion states of low-speed cruising and high-speed striking in the same engine combustion chamber structure without other additional devices, effectively saves the space of an underwater vehicle, and realizes integration of multiple complex functions in a small space. The battle ability and the flexibility of the underwater weapon system are improved.
The engine shell designed by the invention is hollow, and the stamped inlet water is preheated by the shell before entering the combustion chamber, so that atomization and evaporation are facilitated.
The water inlet system designed by the invention is provided with a plurality of water inlet openings, the primary water inlet opening is close to the explosive column, and the quantitative combustion reaction of the inlet water and the metal fuel is realized by controlling the opening of the water valve and adjusting the water inflow according to the design scheme. The secondary water inlet is divided into two times of entering, two water inlets are designed in front of the engine nozzle, the water inlet flow of a single nozzle is reduced, the atomization effect is improved, and sufficient combustion is facilitated.
Drawings
FIG. 1 is a schematic view of a preheated water induction ramjet engine of the present invention.
The chemical feeding device comprises a chemical feeding section 1, a combustion chamber section 2, a water inlet section 3, an annular cavity 4, a nozzle 5, a chemical column 6, a connecting flange 7, a water inlet control valve 8, an external water inlet 9, a total water inlet 10, a water outlet 11 and an internal water inlet 12.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, the preheating type water inlet ramjet engine shell is formed by connecting a plurality of sections, the rear end of a head charging section 1 is sequentially connected with at least one combined section, and the tail part of the last combined section is connected with an end combustion chamber section and then connected with a nozzle 5; wherein, the combined section consists of a combustion chamber section 2 and a water inlet section 3 connected with the rear end; the shell of the combustion chamber section 2 is of an inner-outer double-layer structure to form an annular cavity 4; the shell of the water inlet section 3 is also of an inner-outer double-layer structure to form an annular cavity with two closed ends; the annular cavities of the water inlet sections 3 are internally provided with channels for connecting the annular cavities 4 of the combustion chamber sections 3 at two sides, so that the annular cavities 4 at two ends are communicated, finally the annular cavities 4 of all the combustion chamber sections 2 are communicated, external inlet water enters the annular cavities 4 through the water inlet control valve 8 and the total water inlet 10, and can be preheated in the annular cavities 4.
Wherein, a main water inlet 10 is arranged on the outer shell of at least one combustion chamber section 2, and the main water inlet 10 is connected with an external water inlet 9 through a water inlet control valve 8; the outer shell of the annular cavity of each water inlet section 3 is communicated to the water outlet 11 of the annular cavity 4 of the combustion chamber section 3 at the front end or the rear end through a water inlet control valve 8; a plurality of internal water inlets 12 are evenly arranged on the inner side shell of each water inlet section 3 along the circumferential direction.
The sections of the engine shell are connected through the flange plates 7 by the connecting bolts, the combined section can be detached, and the total length of the engine can be changed. The quantity of the water inlet sections 3 (namely the quantity of the combined sections) can be adjusted according to the thrust requirement or the combustion requirement of different grains 6, 1-3 water inlet sections can be arranged, and the length of the combustion chamber section 3 can be changed for matching the combustion characteristics of different grains 6, so that the distance between the inner water inlet 12 and the grains 6 in the water inlet section 3 is changed, and the purpose of controlling the chemical reaction degree of the fuel gas and the inlet water is achieved.
And the water inlet control valve 8 is used for controlling whether the water inlet is opened or not. The external water inlet 9 is filled with water from the outside, and the water enters the hollow shell 1 of the engine and the annular cavity 4 of the whole combustion chamber section 2 through the main water inlet 10 of the cylinder body by the water inlet control electrovalve 8. From the head of the engine, after the water inlet control valve 8 of the first water inlet section 3 is opened, water in the annular cavity 4 of the combustion chamber section 2 enters the annular cavity of the water inlet section 3 through the water outlet 11 and enters the combustion chamber of the engine through the internal water inlet 12 on the inner shell of the water inlet section 3 to participate in combustion reaction. Similarly, the water inlet process of the later water inlet section 3 is the same as that of the first water inlet section 3.
The engine grain 6 can be made into a hollow structure or a solid structure according to the thrust design requirement, and is arranged in the charging section 1 of the head part of the engine, and the total water inlet 10 can be arranged on the shell of the first combustion chamber section 2.
The working principle of the device is as follows:
after the water-jet engine receives a starting instruction, the fuel burning column 6 is firstly ignited to generate fuel gas, then water outside the navigation body enters the annular cavity 4 of the engine shell, and then enters the first water inlet section 3, the second water inlet section 3 and the inner water inlet 12 of the third water inlet section 3 in sequence under the control of the electromagnetic valve 8, and then is mixed with the fuel gas generated by combustion of the fuel column 6 in the engine through the atomization effect of the inner water inlet 12 to generate metal water reaction, release heat and increase working media, and then is subjected to pressure reduction and acceleration by the nozzle 5 to be ejected out of the engine to generate thrust.
Summarizing the operation method of the direct injection type multistage power underwater propeller, the steps are as follows:
(1) after the water-flushing engine starts to work, the explosive column 6 is ignited to generate a small amount of fuel gas, and the temperature of the combustion chamber of the engine rises.
(2) And opening a water inlet control valve 8 connected with an external water inlet 9, introducing water outside the navigation body into the annular cavity 4 of the first combustion chamber section 2, filling all the annular cavities 4 of the combustion chamber sections 2 through a channel arranged in the first water inlet section 3, absorbing heat generated by combustion of the explosive column 6, raising the water temperature and simultaneously generating a cooling effect on the shell.
(3) And opening a water inlet control valve 8 connected to the first water inlet section 3, enabling external inlet water to enter the first combustion chamber section 3 through an internal water inlet 12 on an inner shell of the water inlet section 3, atomizing, reacting with fuel gas generated by combustion of the explosive column 6, further releasing fuel energy, and increasing the temperature in the combustion chamber.
(4) Similarly, the water inlet control valve 8 of the second water inlet section 3 is opened, the preheated external inlet water in the shell annular cavity 4 enters the combustion chamber and is mixed with the internal fuel gas, the vaporization phase change is further generated, and the working medium of the engine is increased.
(5) The fuel gas and the water vapor after the phase change evaporation are sprayed out from the engine nozzle 5 to generate thrust to push the navigation body to move forward.
(6) According to the requirement of thrust, the water inlet control valve 8 of part of the water inlet section 3 can be selectively opened, and the water inlet amount is adjusted along with the water inlet control valve, so that the reaction amount of metal water is adjusted, and the acting power of the engine is controlled.
(7) And part of the combined section can be disassembled according to the space limitation of the navigation body, and the length of the engine is adjusted to adapt to the combat scheme.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A preheating type water inlet ramjet engine structure is characterized in that the rear end of a head charge section (1) of an engine shell is sequentially connected with at least one combined section, and the tail part of the last combined section is connected with a tail combustion chamber section and then connected with a nozzle (5); wherein, the combined section consists of a combustion chamber section (2) and a water inlet section (3) connected with the rear end; the shell of the combustion chamber section (2) is of an inner-outer double-layer structure to form an annular cavity (4); the shell of the water inlet section (3) is also of an inner-outer double-layer structure to form an annular cavity with two closed ends; a channel for connecting the annular cavities (4) of the combustion chamber sections (3) at two sides is arranged in the annular cavity of the water inlet section (3), so that the annular cavities (4) at two ends are communicated;
a main water inlet (10) is arranged on the outer shell of at least one combustion chamber section (2), and the main water inlet (10) is connected with an external water inlet (9) through a water inlet control valve (8); the outer shell of the annular cavity of each water inlet section (3) is communicated to a water outlet (11) of the annular cavity (4) of the combustion chamber section (3) at the front end or the rear end through a water inlet control valve (8); a plurality of internal water inlets (12) are uniformly arranged on the inner side shell of each water inlet section (3) along the circumferential direction.
2. A pre-heated water-fed ramjet engine structure as claimed in claim 1, characterized in that the charge section (1), the combined section and the tail-combustion chamber section are butted by flanges (7) at the ends where they are joined to each other.
3. A pre-heated water-intake ramjet engine structure according to claim 2, characterized in that said flanges (7) are bolted together.
4. A pre-heated water-intake ramjet engine structure according to claim 2, characterized in that said flanges (7) are connected by welding.
5. A pre-heated water-intake ramjet engine structure as set forth in claim 1, wherein said combined segments are 1-3 in number.
6. A control method of a preheating type water-intake ramjet engine structure according to claim 1, characterized by comprising:
(1) after the water-flushing engine starts working, the explosive column (6) is ignited;
(2) opening a water inlet control valve (8) connected with an external water inlet (9);
(3) opening a water inlet control valve (8) connected to the first water inlet section (3);
(4) after a set time, opening the water inlet control valves (8) of the rear water inlet sections (3) in sequence;
or opening the water inlet control valve (8) of the selected water inlet section (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111498009.6A CN114408145B (en) | 2021-12-09 | 2021-12-09 | Preheating type water inlet ramjet engine structure and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111498009.6A CN114408145B (en) | 2021-12-09 | 2021-12-09 | Preheating type water inlet ramjet engine structure and control method |
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| CN114408145A true CN114408145A (en) | 2022-04-29 |
| CN114408145B CN114408145B (en) | 2023-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428075A (en) * | 2023-03-17 | 2023-07-14 | 哈尔滨工程大学 | Water ramjet engine control method based on coupling of combustion chamber pressure and water inflow |
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| CN114408145B (en) | 2023-04-07 |
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