JP3044576B2 - Ram rocket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ram rocket used for obtaining a flying thrust of a flying object.

[0002]

2. Description of the Related Art Conventionally, as a ram rocket used for obtaining a flying thrust of a flying object, there is, for example, one having a structure as shown in FIG.

A ram rocket 51 shown in FIG. 4 has a ram combustor 53 provided with a booster propellant 52, and a sustainer propellant which generates a combustible gas excessively combustible following the combustion of the booster propellant 52. 54, a gas nozzle 56 for injecting the fuel-rich combustible gas into the ram combustor 53, and a port 53a provided in the ram combustor 53 to burn the combustible gas. An air inlet 57 for taking air to be taken into the ram combustor 53, and the port 53a is closed when the booster propellant 52 burns, and the port 53a is opened in accordance with the end of the booster propellant 52 combustion. A port cover 58 and a booster nozzle 6 functioning as a nozzle when the booster propellant 52 burns
1 and a ram nozzle 62 which functions as a nozzle when combustible gas generated by the ignition of the sustainer propellant 54 is fired. The port cover 58 is restrained by a port cover release mechanism (not shown). Is to be released.

The port cover 58 is made of a glass plate, an aluminum plate or the like having an integral structure or a split structure. (For example, Japanese Utility Model Application Laid-Open No. 62-126544 is known.)

[0005]

However, in such a conventional ram rocket 51, the port cover 58 is made of a glass plate, an aluminum plate or the like having an integral structure or a split structure, and is provided with a booster. The port cover 58 is removed and air is introduced from the port 53a when the combustion of the propellant 52 for combustion proceeds to the ignition of the propellant for sustainer 54, so that the removed port cover 58 is provided by the ram combustor. Since it is discharged outside from the ram nozzle 62 as a large lump without burning out in the 53, the lump-shaped port cover (58) collides with the ram nozzle and breaks it, thereby obtaining a predetermined lump. There was a problem that thrust could not be obtained in some cases.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has sufficient rigidity to close a port at the time of combustion of a booster propellant. It is an object of the present invention to provide a ram rocket equipped with a port cover that opens a port in a short time without being formed as a lump from a nozzle portion immediately after completion and discharged to the outside.

[0007]

SUMMARY OF THE INVENTION The present invention provides a ram combustor having a booster propellant and a gas generator having a sustainer propellant which generates flammable gas following combustion of the booster propellant. Having an air intake port connected to a port provided in the ram combustor to take in air into the ram combustor, closing the port during combustion of the booster propellant, in ram rocket provided with a port cover to open the port in accordance with the combustion end, said Potokaba over the
Rotatably set vignetting via the hinge is formed of a material having a burn out properties, meet the combustion end of the booster for propellant
And rotate it around the hinge to open the port.
To form a frame holder in the ram combustor before the burnout
The structure of such a ram rocket is a means for solving the above-mentioned conventional problems.

[0008]

[0009] The port Toka <br/> bar ram rocket according to the present invention, a material having a burn out properties, for example, it is preferable to employ a thermoplastic polymer such as polymethyl methacrylate (PMMA).

[0010]

Since the ram rocket according to the present invention has the above-described structure, the port is closed when the booster propellant is burned, and the port cover is closed for a short time in accordance with the end of the booster propellant combustion. from opening the port by rotating around the hinge of the port cover component as in the prior art is not able, as discharged to the outside while the bulk. Ports with open ports
Cover may be caused by the combustion of the Sustainer propellant.
Flammable gas and introduced through air intake and port
Exposed to the flame when the compressed air mixes and burns
While burning, gradually burns and functions as a frame holder
The flame in the ram combustor blows out
Will be avoided.

[0011]

FIG. 1 shows an embodiment of a ram rocket according to the present invention. The ram rocket 1 shown in FIG.
A ram combustor 3 having a booster propellant 2, a gas generator 5 having a sustainer propellant 4 for generating a fuel-rich combustible gas following combustion of the booster propellant 2, A gas nozzle 6 for injecting gas into the ram combustor 3; an air inlet 7 connected to a port 3a provided in the ram combustor 3 to take in air for burning the combustible gas into the ram combustor 3; A port cover 8 that closes the port 3a when the booster propellant 2 burns and opens the port 3a in accordance with the end of the combustion of the booster propellant 2; A booster nozzle 11 that functions as a nozzle, and a ram nozzle 12 that functions as a nozzle when combustible gas generated by the ignition of the sustainer propellant 4 is burned. Those forming the provided structure.

FIG. 2 is an enlarged view showing a portion of the air inlet 7, the port 3a and the port cover 8 of FIG. 1. The ram combustor 3 is provided inside the metal outer shell 13 through the insulation 14. A booster propellant 2 is provided. The port 3a has a stepped flange portion 13a such that the opening area on the outer peripheral side is smaller than the opening area on the inner peripheral side.
And the stepped flange 13a
Flange portion 1 on the periphery of port 3a formed by
A port cover 8 is provided on 3a via a seal ring 15.

The port cover 8 in this embodiment is made of a molded body of burnable polymethyl methacrylate (PMMA), and has an insulation 16 on the inner surface side. And this port cover 8
Closes the port 3a by pivotally connecting to the metal outer shell 13 via a hinge 17 provided on a part of the metal outer shell 13 located on the rear side (right side in the figure) of the port 3a.
When the internal pressure of the ram combustor 3 becomes lower than the ram pressure on the side of the air intake 7 when the combustion of the booster propellant 2 ends and the booster propellant 2 finishes burning, the pressure difference causes As shown in FIG. 3, by turning around the hinge 17 and facing in the radial direction of the ram combustor 3,
The port 3a is opened.

In this case, as shown in FIG.
The port cover 8 that has opened the a is exposed to the flame when the combustible gas injected from the gas nozzle 6 mixes with the compressed air introduced through the air inlet 7 and the port 3a and burns. Yes gradually to function as a frame holder by continue to burn, so as to prevent the disappeared can blow the flame in the ram combustor 3 occurs.

In the ram rocket 1 having such a configuration, first, the propellant 2 for the booster of the ram combustor 3 is ignited to start by obtaining a thrust, and reaches a set Mach number necessary for operation by the ram pressure. Accelerate until you do. And
When the booster nozzle 11 is removed and becomes the ram nozzle 12 at the stage where the set Mach number is reached and the combustion of the booster propellant 2 ends, when the internal pressure of the ram combustor 3 rapidly decreases, Due to the pressure difference between the internal pressure and the ram pressure on the side of the air inlet 7, the port cover 8 rotates counterclockwise in FIG. 2 around the hinge 17, thereby causing the port 3 a to move as shown in FIG. Be released.

At the same time, a flammable gas generated by igniting the sustainer propellant 4 is injected from the gas nozzle 6 and enters the ram combustor 3, and the flammable gas and the air inlet 7 and the port Combustion reaction occurs continuously with the compressed air introduced through 3a, and the resulting high-temperature combustion gas is ejected from the ram nozzle 12 to generate thrust.

At this time, as shown in FIG.
The port cover 8 with the opening a functions as a frame holder by gradually burning as the combustible gas burns, so that the flame in the ram combustor 3 may blow out. Sex is less.

As described above, the port cover 8 is attached to the hinge 1.
7 so as to be rotatable, and to close the port 3a.
Since the port 3a can be opened, the port 3a is surely closed when the booster propellant 2 is burning, and at the end stage of the combustion of the booster propellant 2, the internal pressure of the ram combustor 3 and the air intake port 7 are lowered. The port 3a is opened by pivoting about the hinge 17 due to the pressure difference from the ram pressure on the side, so that the components of the port cover 8 are discharged to the outside in a lump as in the related art. No more.

[0019]

According to the present invention , the port is reliably closed during the combustion of the booster propellant, and the port cover is quickly closed in accordance with the termination of the booster propellant combustion. Since the port is opened by pivoting about the hinge, the port cover components are not discharged to the outside in a lump as in the prior art, and the nozzle of the ram rocket is damaged. Will be avoided and, in addition,
After opening, the port cover itself gradually burns and flashes.
Function as a ram holder,
A remarkably excellent effect is obtained in that it is possible to reliably prevent the flame from blowing out.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view showing a schematic configuration of a ram rocket according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional explanatory view showing an air intake port, a port, and a port cover of the ram rocket shown in FIG. 1;

FIG. 3 is an explanatory cross-sectional view showing a state where a port cover is rotated.

FIG. 4 is an explanatory longitudinal sectional view showing a schematic configuration of a conventional ram rocket.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 ram rocket 2 booster propellant 3 ram combustor 3a port 4 sustainer propellant 5 gas generator 7 air intake 8 port cover 17 hinge

Continued on the front page (72) Inventor Takuo Kuwahara 2 Nissan Motor Co., Ltd., Nissan Motor Co., Ltd. 2 Nissan Motor Co., Ltd. Nissan Motor Co., Ltd. (72) Inventor Minoru Mitsuno 2 Takaracho 2 Kanagawa City, Yokohama City, Kanagawa Prefecture (72) Inventor Ichiro Nakagawa 2 Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-4-148051 (JP, A) JP-A-60-142033 (JP) , A) JP-A-4-148047 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02K 7/18 F02K 9/78

Claims (1)

(57) [Claims] 1. A ram combustor provided with a booster propellant, a gas generator provided with a sustainer propellant that generates flammable gas following combustion of the booster propellant, and a ram combustor provided in the ram combustor. The ram combustor has an air intake which is connected to the port, which closes the port when the booster propellant burns, and closes the port in accordance with the end of the booster propellant combustion. in ram rocket provided with a port cover to be opened, the Potokaba over the form of a material having a burn out properties
It made that it rotatably set via a hinge vignetting, booster
Pivot around the hinge in accordance with the end of propellant combustion
Ram combustor before burnout with port open
Ram rocket characterized by the formation child frame holder within.