CN110530605B

CN110530605B - Underwater vehicle exhaust experimental device

Info

Publication number: CN110530605B
Application number: CN201910784718.7A
Authority: CN
Inventors: 韩玉阁; 朱寰宇; 朱晨光; 宣益民; 林群青
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2021-07-13
Anticipated expiration: 2039-08-23
Also published as: CN110530605A

Abstract

The invention discloses an exhaust experimental device of an underwater vehicle, which comprises a boat body, a smoke generating device bearing structure and a smoke generating device. Flue gas generating device installs in flue gas generating device bearing structure, and flue gas generating device bearing structure is located hull command tower anterior segment, and command tower and hull are run through perpendicularly to its cavity, contain in hull structure. The electric ignition head of the smoke generator ignites the ignition powder underwater, so that the ignition powder can generate a large amount of gas with higher temperature and controllable temperature, and meanwhile, the electric ignition head is quickly separated from the smoke generator, so that the thermal wake characteristic of the submarine underwater vent pipe in a sailing state can be simulated. The invention initiates the application of pyrotechnic composition in submarine thermal wake experiment, realizes the stable high-temperature exhaust of the submarine model under water by simple design, and avoids the influence of the air vent pipeline entering water in the traditional design on the flow field.

Description

Underwater vehicle exhaust experimental device

Technical Field

The invention belongs to the technical field of submarines, and particularly relates to an exhaust experimental device of an underwater vehicle.

Background

When the conventional submarine sails underwater, the power device of the diesel generator must charge the storage battery in a state of the vent pipe, and the discharged large amount of high-temperature waste gas raises the temperature of the seawater around the submarine. Meanwhile, a large amount of bubbles with gas with higher temperature and controllable temperature can carry seawater to flow to the sea surface, so that the infrared thermal characteristics of the seawater and the background of the sea surface generate obvious infrared radiation difference. At present, infrared detectors with high sensitivity on many carrier-borne aircrafts and airborne aircrafts can obviously capture infrared radiation difference. The concealment of the submarine is greatly reduced, and the submarine is easy to find and attack, so that the survival of the submarine is threatened. Therefore, the influence of submarine exhaust on the infrared target characteristics is researched, and the submarine has important significance on investigation, detection and attack of enemy submarines and improvement of stealth and survival capacity of submarines.

For submarine wake research, the cost of real submarine wake research in a real environment is huge and the experiment difficulty is high, so that submarine wake research at home and abroad is carried out by utilizing submarine models in large water tanks in laboratories more. According to the similarity criterion, the submarine model after scaling the real submarine can better reflect the characteristics of the real submarine, which is the theoretical basis for developing experimental simulation research. Foreign related research starts earlier, and from the cold war, the America and the Su nations develop a large amount of systematic experimental work on the wake flow of the naval vessels. The experimental conditions and experimental scheme design are much ahead of our country. Therefore, the innovative experimental design has important significance for the development of the ship wake flow experiment in China.

In the related experiment of the submarine wake at present, the submarine thermal wake simulation mode is mainly to heat air or water outside a water tank, and heat gas or water is introduced into the water tank from a pipeline by taking a pump as a power source so as to simulate the submarine thermal wake generated underwater. The methods in the comparison literature (wu manhor, hebey, zhangfeng, et al. thermal characteristic experiment of wake flow water surface of underwater vehicle in temperature stratification water tank [ J ]. infrared and laser engineering, 2011,40 (8).): 1. the experimental device is complex and comprises a heating device, a pump and related pipelines, and if the model of the submarine is considered to simulate the navigation of a real submarine, the design of the pipelines is more complex. 2. The part of the pipeline in the water tank is immersed in water, so that heat loss is large, and the temperature of the air outlet part is lower than the designed temperature. 3. Because the submarine model is provided with the external pipeline, when the model moves, the pipeline tends to follow the model to move to influence the original submarine wake flow field, thereby influencing the situation of simulating the real submarine motion.

Disclosure of Invention

The invention aims to provide an underwater navigation exhaust experimental device.

The technical scheme for realizing the invention is as follows: the utility model provides an underwater vehicle exhaust experimental apparatus, includes flue gas generating device bearing structure and flue gas generating device, flue gas generating device bearing structure sets up at hull command tower anterior segment, and runs through command tower and hull perpendicularly, flue gas generating device loads in flue gas generating device bearing structure, wherein, flue gas generating device includes cavity, pyrotechnic composition, ignition powder, electric spark ignition head, pyrotechnic composition, ignition powder fill in proper order in the cavity, and electric spark ignition head contacts with ignition powder.

Preferably, the bearing structure of the smoke generating device comprises a cavity, an exhaust hole and a filling hole, wherein the exhaust hole and the filling hole are respectively positioned at two ends of the cavity, the diameter of the exhaust hole is smaller than that of the cavity, and the exhaust hole and the filling hole are both provided with sealing structures, so that the cavity forms a sealed cavity structure.

Preferably, the electric spark ignition head ignites the ignition charge through the electric ignition head connected to the electric lead using an external power source.

Preferably, the electric spark ignition head is provided with a remote control electric ignition head for igniting the ignition powder.

Preferably, the pyrotechnic formulation oxidant is: any one or combination of potassium nitrate, strontium nitrate or sodium nitrate; the combustible agent is: any one or combination of magnesium powder, aluminum powder, magnesium aluminum alloy powder, silicon powder or boron powder.

Compared with the prior art, the invention has the following remarkable advantages: 1) the structure of the invention is simpler, the main structure is a command tower smoke generating device bearing structure and a smoke generating device, and other external accessory equipment is not provided; 2) the temperature of the exhaust outlet is the designed temperature, so that heat loss caused by the fact that the exhaust pipeline is immersed in water in the traditional design is avoided; 3) the invention eliminates the interference of the exhaust pipe which is connected with the submarine model and extends into the water in the traditional design to the model wake flow field in the wake flow experiment.

The present invention is described in further detail below with reference to the attached drawing figures.

Drawings

FIG. 1 is a schematic view of the overall structure of the submarine model underwater high-temperature exhaust device of the invention.

FIG. 2 is an enlarged view of a portion of the load bearing structure of the smoke generator.

Fig. 3 is a partially enlarged view of the smoke generating device.

Detailed Description

An exhaust experimental device of an underwater vehicle simulates high-temperature exhaust of an underwater submarine by utilizing a controllable gas process with higher combustion release temperature of pyrotechnic composition placed in a submarine model, and comprises a smoke generating device bearing structure and a smoke generating device, wherein the smoke generating device bearing structure is arranged at the front section of a submarine body commanding tower and vertically penetrates through a commanding tower and a submarine body, and the smoke generating device is filled in the smoke generating device bearing structure;

the smoke generating device comprises a cavity 7, pyrotechnic composition 8, ignition powder 9 and an electric spark ignition head 10, wherein the pyrotechnic composition 8 and the ignition powder 9 are sequentially filled in the cavity 7, and the electric spark ignition head 10 is in contact with the ignition powder 9.

In a further embodiment, the bearing structure of the smoke generating device comprises a cavity 2, an exhaust hole 3 and a filling hole 4, wherein the exhaust hole 3 and the filling hole 4 are respectively positioned at two ends of the cavity 2, the diameter of the exhaust hole 3 is smaller than that of the cavity 7, and sealing structures are arranged on the exhaust hole 3 and the filling hole 4 to enable the cavity 2 to form a sealed cavity structure.

In a further embodiment, the spark ignition head 10 uses an external power source to ignite the ignition charge through the spark ignition head connected to an electrical lead.

In a further embodiment, the spark ignition head 10 is a remote controlled electric ignition head.

In a further embodiment, the pyrotechnic composition 8 formulation oxidant is any one of potassium nitrate, strontium nitrate or sodium nitrate; the combustible agent is any one of magnesium powder, aluminum powder, magnesium aluminum alloy powder, silicon powder or boron powder.

The invention applies the pyrotechnic composition to the submarine model, and simulates the submarine heat exhaust by a large amount of gas with higher temperature and controllable temperature generated after the pyrotechnic composition is ignited.

The shell of the smoke generating device can bear the high temperature of the pyrotechnic composition during combustion. The pyrotechnic composition is filled in the metal cylindrical container by taking strontium nitrate and magnesium as main components, and generates a large amount of heat and gas during combustion. The ignition powder mainly comprises magnesium powder and barium nitrate, and is covered on the pyrotechnic composition. The electric ignition head is embedded into the ignition powder, an external power supply can be used for being connected with the electric ignition head through an electric lead for ignition or the remote control electric ignition head is used for ignition, and the electric ignition head is quickly separated from the smoke generator when the pyrotechnic composition is ignited.

Examples

And (4) scaling the SUBOOFF model according to a similar criterion, determining the external geometric dimension of the submarine model, and determining the size of an exhaust hole and the exhaust flow.

As shown in fig. 1, an underwater high-temperature exhaust device for a submarine model comprises a submarine body 1, a smoke generating device bearing structure and a smoke generating device.

As shown in fig. 2, the flue gas generator carrying structure is arranged at the position of a command tower of the submarine body 1, the cavity 2 penetrates from the top to the bottom of the command tower, and the cavity is just sized to be placed into the flue gas generator cavity 7. The top of the cavity 2 is provided with an exhaust hole 3, the size of the exhaust hole 3 is slightly smaller than that of the cavity 2, so that the cavity 7 of the smoke generator can be just clamped, and meanwhile, smoke exhausted from the opening of the smoke generator can be exhausted from the exhaust hole 3. The filling hole 4 at the bottom of the cavity 2 is provided with a thread design for cooperating connection with a sealing member 5. One end of the sealing component 5 is provided with a groove 6, so that a screwdriver is convenient to use and screw down.

As shown in fig. 3, the smoke generating device comprises a cavity 7, pyrotechnic composition 8, ignition charge 9 and an electric spark ignition head 10, wherein the pyrotechnic composition 8 generates a large amount of high-temperature smoke, the ignition charge 9 is easy to be ignited by the electric ignition head and ignites the pyrotechnic composition, and the electric spark ignition head 10 can be rapidly separated from the smoke generator under the action of internal pressure under the condition of igniting the pyrotechnic composition. The smoke generator takes the electric ignition head end as the positive direction, the whole smoke generator comprises an electric lead from the positive direction and is placed into the cavity 2 from the bottom of the cavity, the electric lead penetrates out of the exhaust hole 3 and seals the exhaust hole 3 with sealant, the sealing part 5 is screwed into the bottom, the position of the sealing part is adjusted through threaded connection, and the fixing effect on the smoke generator is achieved.

The specific working process of the device is as follows: after the submarine model is assembled according to the above embodiment, the submarine model is placed in an experimental water tank and fixed on a towing device. The electric igniter is ignited by means of an external lead or remote ignition. After the ignition powder and the pyrotechnic composition are ignited, the electric ignition head is quickly separated from the exhaust hole due to the increase of the internal pressure of the smoke generator. After the electric ignition head and the lead are separated, high-temperature bubbles continuously emerge from the exhaust hole, meanwhile, the water tank towing device is started, and the submarine model moves in the water tank to simulate the exhaust navigation state of the air pipe of the submarine.

Claims

1. The exhaust experimental device of the underwater vehicle is characterized by comprising a smoke generating device bearing structure and a smoke generating device, wherein the smoke generating device bearing structure is arranged at the front section of a hull commanding tower and vertically penetrates through the commanding tower and a hull, the smoke generating device is filled in the smoke generating device bearing structure, the smoke generating device comprises a cavity (7), pyrotechnic compositions (8), ignition powders (9) and an electric spark ignition head (10), the pyrotechnic compositions (8) and the ignition powders (9) are sequentially filled in the cavity (7), and the electric spark ignition head (10) is in contact with the ignition compositions (9);

the bearing structure of the smoke generating device comprises a cavity (2), exhaust holes (3) and a filling hole (4), wherein the exhaust holes (3) and the filling hole (4) are respectively located at two ends of the cavity (2), the diameter of each exhaust hole (3) is smaller than that of the cavity (7), and sealing structures are arranged on the exhaust holes (3) and the filling hole (4) to enable the cavity (2) to form a sealing cavity structure.

2. The underwater vehicle exhaust gas experimental apparatus according to claim 1, wherein the electric spark ignition head (10) ignites the ignition charge through the electric ignition head connected with an electric lead using an external power source.

3. The underwater vehicle exhaust gas experimental device according to claim 1, wherein the electric spark ignition head (10) is provided with a remote control electric ignition head for igniting the ignition charge.

4. The underwater vehicle exhaust gas experimental apparatus according to claim 1, wherein the pyrotechnic charge (8) formulation oxidant is: any one or combination of potassium nitrate, strontium nitrate or sodium nitrate; the ignition powder (9) is: any one or combination of magnesium powder, aluminum powder, magnesium aluminum alloy powder, silicon powder or boron powder.