JP2729874B2 - Ignition method and ignition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniting method and an igniting device for a projectile launching device. The present invention relates to an ignition method and an ignition device for supplying to a combustion chamber.

[0002]

2. Description of the Related Art An ignition operation in a projectile launching apparatus is generally performed by supplying ignition combustion gas to a combustion chamber of a gun, and is shown in FIG. 4 or JP-A-3-24799.
As disclosed in Japanese Patent Publication No. 6 (1994), an ignition combustion gas generated in an ignition chamber having a nozzle is introduced into a gas diffusion space such as a gas passage and a sub-combustion chamber, and after diffusion and mixing, is supplied to a combustion chamber of a gun. Various proposals have been made. For example, for the flying object launching device 21 shown in FIG.
Wall of the combustion chamber 23 and ignition device 24 is connected, at the time of ignition operation filled by injecting ignition fuel F ₁ to the ignition chamber 25, ignition chamber 25 and the rod-shaped electrode 27 the power circuit 26 is turned on actuation A high voltage is applied in between. Thus, burning ignition fuel F _1, to generate the ignition combustion gases. The ignition combustion gas is ejected from the ignition chamber nozzle 28, flows into the ignition combustion gas passage 29, and flows into the combustion chamber 23 of the gun after diffusion and mixing.

[0003]

According to the above conventional ignition technique, the ignition combustion gas supplied to the combustion chamber of the gun tends to have a shortage of energy, and it is difficult to reliably perform the ignition operation. . That is, although the ignition combustion gas generated in the ignition chamber has a high temperature and a high pressure, it contains an incomplete combustion component, and after being ejected from the ignition chamber nozzle, diffuses and mixes in a gas diffusion space such as a gas passage, a sub-combustion chamber, etc. I do. By the way, in the gas diffusion space, spontaneous circulation occurs due to the ignition combustion gas being ejected from the nozzles, whereby the gas is diffused and mixed. However, since the natural circulation is extremely weak and cannot sufficiently diffuse and mix, some of the incompletely burned components burn, but most of them flow into the combustion chamber of the gun in an unburned state. . On the other hand, the amount of ignition fuel is set so as to generate ignition combustion gas having a predetermined ignition energy when completely burned. Therefore,
Since the ignition combustion gas flowing into the combustion chamber of the gun contains incomplete combustion components, the amount of generated energy is reduced accordingly, and the predetermined ignition energy cannot be supplied.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. An object of the present invention is to increase ignition energy by sufficiently diffusing and mixing ignition combustion gas in a gas diffusion space to increase ignition energy. An object of the present invention is to provide an ignition method and an ignition device capable of stably performing an operation.

[0005]

According to the present invention, a spiral groove or projection is provided on an inner wall of a gas diffusion space such as a gas passage or a sub-combustion chamber.
Circulation or turbulence is forcibly generated in the ignited combustion gas, so that it is sufficiently diffused and mixed.

That is, according to the ignition method of the present invention, an ignition combustion gas is generated in an ignition chamber having a nozzle, and the ignition combustion gas is introduced into a gas diffusion space to be diffused and mixed, and then supplied to a combustion chamber of a gun. In the method, a spiral groove is provided in the inner wall of the gas diffusion space so that a circulation is generated in the ignition combustion gas for diffusion mixing. Protrusions may be provided on the inner wall of the gas diffusion space to generate turbulence in the ignition combustion gas. Further, a projection may be provided around the spiral groove so as to forcibly generate circulation and turbulence in the ignition combustion gas.

Further, the ignition device of the present invention generates an ignition combustion gas in an ignition chamber having a nozzle, introduces the ignition combustion gas into a gas diffusion space, diffuses and mixes the ignition combustion gas, and supplies the mixture to a combustion chamber of a gun. In the apparatus, the gas diffusion space is provided with a spiral groove on an inner wall thereof. The gas diffusion space may have a projection provided on the inner wall thereof, or may have a projection provided around the spiral groove.

[0008]

The ignition combustion gas generated in the ignition chamber is ejected from the nozzle of the ignition chamber and then flows into the combustion chamber of the gun through the gas diffusion space. When the spiral groove is provided on the inner wall of the gas diffusion space, a part of the ignition combustion gas moves along the spiral groove, whereby centrifugal force acts on the ignition combustion gas, and the circulation is forcibly performed. Occur. In addition, the spiral groove extends the movement path of the ignition combustion gas, and accordingly, the section in which turbulence is generated becomes longer. Therefore, the ignition combustion gas is sufficiently diffused and mixed by the circulating flow and the turbulent flow, and most of the incompletely burned components are burned to increase the energy.
When a projection is provided on the inner wall of the gas diffusion space, the ignited combustion gas violently collides with the projection to increase turbulence, thereby sufficiently diffusing and mixing, and increasing energy in the same manner as described above. .

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. A projectile launching device 1 shown in FIG. 1 has a combustion chamber 4 and a fuel chamber 5 formed by partitioning a rear interior of a gun 2 with a regeneration piston 3.
An ignition device 6 is connected to the combustion chamber 4 to supply ignition combustion gas at the time of ignition operation.

The ignition device 6 is a nozzle ignition device with a sub combustion chamber in which an ignition chamber 8 is provided in an ignition device main body 7 and a sub combustion chamber 9 which is a gas diffusion space is provided above the ignition chamber 8. The lower part of the ignition chamber 8 is formed of an insulator 10.
A power supply circuit 12 is connected between the rod-shaped electrode 11 and the ignition device main body 7. When the power supply circuit 12 is turned on, the upper part of the ignition chamber 8 is used as a cylindrical electrode to apply a high voltage to the rod-shaped electrode 11. Thus, burning ignition fuel F ₁ of the ignition chamber 8, and summer to generate ignition combustion gases. An ignition chamber nozzle 13 is formed in the upper part of the ignition chamber 8, communicates the ignition chamber 8 with the auxiliary combustion chamber 9, and discharges the ignition combustion gas generated in the ignition chamber 8 into the auxiliary combustion chamber 9. I'm sorry. The sub-combustion chamber 9 is formed in a tubular shape by fitting a booster 14 to the ignition device main body 7. As shown in FIGS. 2 and 3, the booster 14 has a sub-combustion chamber nozzle 15 for ejecting ignition combustion gas into the combustion chamber 4 at one end, and a plurality of spiral grooves 16 formed on an inner wall. A projection 17 is formed around the spiral groove 16. As a result, in the sub-combustion chamber 9, a part of the ignition combustion gas moves along each spiral groove 16 to generate centrifugal force, and the centrifugal force forcibly generates a circulation. Further, it collides violently with the projection 17 and generates a turbulent flow. The spiral groove 16 only needs to be formed in a concave cross-sectional shape, and may be trapezoidal, semicircular, or the like. The projections 17 need not be regularly arranged, and their cross-sectional shape may be any of a trapezoidal shape, a semicircular shape, and the like.

This embodiment is configured as described above.
The operation will be described below. When ignition preparation is completed,
As shown in FIG. 1, is injected for ignition fuel F ₁ as air or the like does not enter the ignition chamber 8 to the upper end of the ignition chamber nozzle 13 filled. Is turned on activating the power supply circuit 12 in this state, the upper portion of the ignition chamber 8 as cylindrical electrode a high voltage is applied between the rod electrode 11, current flows through the ignition fuel F _1, of the ignition fuel F ₁ Some react chemically to form bubbles. Thus, since the pressure in the ignition fuel F ₁ is although be extruded from the ignition chamber 8 acts, that is blocked by the ignition chamber nozzles 13 provided in the upper portion of the ignition chamber 89, the pressure in the ignition chamber 8 Rises sharply. When the pressure in the ignition chamber 8 reaches a predetermined pressure, the other of the ignition fuel F ₁ is a chain reaction manner and burned to generate high-temperature, high-pressure ignition combustion gases. This ignition combustion gas is ejected from the ignition chamber nozzle 13 into the sub combustion chamber 9.

The ignited combustion gas from the ignition chamber 8 flows into the sub-combustion chamber 9 while containing incomplete combustion gas, but is prevented from flowing out of the sub-combustion chamber 9 by the sub-combustion chamber nozzle 15.
It stays in the sub-combustion chamber 9 and diffuses and mixes. At that time, a part of the ignition combustion gas moves along the spiral groove 16 on the inner wall of the booster 14, thereby generating a centrifugal force. Due to this centrifugal force, a circulation is forcibly generated, and the ignition combustion gas is actively diffused and mixed. Further, the violent collision with the projections 17 increases turbulence, and further causes diffusion and mixing. Therefore, the ignition combustion gas is sufficiently diffused and mixed, and the incomplete combustion component is burned, and the combustion gas is almost completely burned. That is, the temperature and pressure increase, and the energy increases. Then, after the energy is increased in the sub-combustion chamber 9, the fuel is jetted from the sub-combustion chamber nozzle 15 to the combustion chamber 4 to supply energy required for ignition.

As described above, according to the present embodiment, the spiral combustion gas flowing from the ignition chamber 8 is forcibly formed by providing the spiral groove 16 and the projection 17 on the inner wall of the sub-combustion chamber 9. In order to generate turbulence and increase turbulence,
Diffusion mixing can be promoted. Thereby, the combustion rate of the incomplete combustion component contained in the ignition combustion gas can be increased, and the energy of the ignition combustion gas can be increased. Therefore, the energy required for ignition can be sufficiently supplied to the combustion chamber 4, and the ignition operation can be stably performed.

The present invention is not limited to this embodiment alone. For example, the auxiliary combustion fuel may be burned in the auxiliary combustion chamber. A structure in which only one of the spiral groove and the projection is provided on the inner wall of the sub-combustion chamber may be used. A gas passage may be provided instead of the sub-combustion chamber.

[0015]

According to the present invention, by providing spiral grooves or projections on the inner wall of the gas diffusion space, diffusion mixing of the ignition combustion gas in the gas diffusion space is promoted, and incomplete combustion in the ignition combustion gas is performed. The burning rate of the components could be increased. This increases the energy of the ignition combustion gas,
A predetermined ignition energy can be supplied to the combustion chamber of the gun, and the ignition operation can be performed much more stably than before.

[Brief description of the drawings]

FIG. 1 is a conceptual explanatory diagram of an embodiment of the present invention, showing a state in which ignition preparation is completed.

FIG. 2 is an enlarged vertical sectional view of a booster which is a main part of the embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a conceptual explanatory diagram of a conventional example.

[Explanation of symbols]

2 Cannon 4 Combustion chamber 6 Ignition device 8 Ignition chamber 9 Secondary combustion chamber 13 Ignition chamber nozzle 14 Booster 16 Spiral groove 17 Projection F ₁ Fuel for ignition

Claims (6)

(57) [Claims] 1. An ignition method for generating ignition combustion gas in an ignition chamber having a nozzle, introducing the ignition combustion gas into a gas diffusion space, diffusing and mixing the gas, and then supplying the gas to a combustion chamber of a gun. An ignition method, wherein a spiral groove is provided in an inner wall of a space to forcibly generate a circulation in an ignition combustion gas to diffuse and mix. 2. An ignition method for generating ignition combustion gas in an ignition chamber having a nozzle, introducing the ignition combustion gas into a gas diffusion space, diffusing and mixing the gas, and supplying the mixture to a combustion chamber of a gun. An ignition method, wherein a projection is provided on an inner wall of a space, and turbulence is forcibly generated in an ignition combustion gas to cause diffusion and mixing. 3. An ignition method for generating an ignition combustion gas in an ignition chamber having a nozzle, introducing the ignition combustion gas into a gas diffusion space, diffusing and mixing the gas, and then supplying the gas to a combustion chamber of a gun. An ignition method, wherein a spiral groove is provided on an inner wall of a space, and a projection is provided around the spiral groove to forcibly generate a circulating flow and a turbulent flow in an ignition combustion gas to diffuse and mix. 4. An ignition device for generating an ignition combustion gas in an ignition chamber having a nozzle, introducing the ignition combustion gas into a gas diffusion space, diffusing and mixing the gas, and supplying the mixture to a combustion chamber of a gun. An ignition device characterized in that the space is provided with a spiral groove on an inner wall thereof. 5. An ignition device for generating ignition combustion gas in an ignition chamber having a nozzle, introducing the ignition combustion gas into a gas diffusion space, diffusing and mixing the gas, and supplying the mixture to a combustion chamber of a gun. An ignition device characterized in that the space has a projection provided on an inner wall thereof. 6. An ignition device for generating an ignition combustion gas in an ignition chamber having a nozzle, introducing the ignition combustion gas into a gas diffusion space, diffusing and mixing the gas, and supplying the mixture to a combustion chamber of a gun. An ignition device, wherein a spiral groove is provided on an inner wall of the space, and a projection is provided around the spiral groove.