JP2915364B2 - Gas generating method and gas generating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a gas generating method and a gas generating apparatus. More specifically, the present invention relates to a gas generating method and a gas generating apparatus using low-concentration hydrogen peroxide having a concentration of about 50 to 60% as a gas generating agent.

[0002]

2. Description of the Related Art Conventionally, as a gas generating agent for an air turbo ram jet engine, a low-concentration peroxide having a low freezing point and a concentration of 60%, which has a low freezing point and has desirable characteristics for use in aviation, has been obtained. So-called two-liquid gas generators using a combination of hydrogen water and a jet fuel (for example, JP-4) have been studied (for example, Tsujikaku et al., "Low Concentration Hydrogen Peroxide / JP-4"). Research on Gas Generator (III) "(33rd Combustion Symposium, Preprints, p. 129, 1995)). It has been confirmed that when the gas generated by the gas generator is burned in a test engine, a reasonable performance can be obtained in the combustion on the fuel lean side in which the environmental friendliness of exhaust gas is strongly considered. .

However, in the decomposition section of the conventional gas generator, a catalyst having a honeycomb-shaped lattice having a catalyst layer formed on the inner surface as shown in FIG. Since gasification is achieved by flowing a low-concentration hydrogen peroxide solution inside the support, there is little opportunity for contact with the catalyst and it is necessary to lengthen the decomposition section in order to complete the decomposition completely. This has led to an increase in the overall length of the engine.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to be more compact and to use a low-concentration hydrogen peroxide solution having a concentration of about 50 to 60%. It is an object of the present invention to provide a gas generating method and a gas generating device capable of stably performing gasification.

[0005]

The gas generating method according to the present invention is a gas generating method using a low-concentration hydrogen peroxide solution, wherein the low-concentration hydrogen peroxide solution is divided into an ignition supply section and a main supply section. And then the ignition supply section and the main supply section
With low-concentration hydrogen peroxide solution supplied to each of
It is characterized by more gasification.

In the gas generating method of the present invention, a part of the low-concentration hydrogen peroxide solution may be gasified by pyrolysis with the heat of reaction of the fuel.

In the gas generating method of the present invention,
It is preferable to gasify the low-concentration hydrogen peroxide solution by setting the differential pressure of the low-concentration hydrogen peroxide solution in the supply section for ignition to a value that is not affected by the pressure fluctuation of the reaction section.

On the other hand, a gas generator according to the present invention is a gas generator that generates a gas from a low-concentration hydrogen peroxide solution and includes a decomposition section for gasifying the low-concentration hydrogen peroxide solution and a reaction section for reacting fuel. there are, the a decomposition unit ignition supply unit, and a main supply portion disposed around the ignition supply unit
Comprising characterized by comprising.

[0009] In the gas generating apparatus of the present invention, the main body of the decomposing section, which gasifies the low-concentration hydrogen peroxide solution in the decomposing section, is formed of a honeycomb structure having a catalyst layer formed on an inner surface thereof. In addition, it is preferable that the divided members are not filled in the storage member for accommodating the disassembled portion main body so that the respective rooms constituting the honeycomb structure do not coincide with each other in the axial direction.

[0010] In the gas generator of the present invention,
A bypass line for supplying a low-concentration hydrogen peroxide solution to the reaction section may be provided.

Further, in the gas generating apparatus according to the present invention, the pressure difference in the supply member and / or the dispersion member relating to the ignition supply portion is set to a value such that the pressure difference is not affected by the pressure fluctuation in the reaction portion. Is preferred.

[0012]

Since the present invention is constituted as described above, the length of the decomposition section provided with the catalyst for gasifying the low-concentration hydrogen peroxide solution can be shortened, thereby shortening the entire engine length. I can do it.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments with reference to the accompanying drawings, but the present invention is not limited to only such embodiments.

FIG. 1 shows a schematic configuration diagram of a gas generator A to which the gas generation method of the present invention is applied. This gas generation method is a two-liquid type gas generation method using a low-concentration hydrogen peroxide solution having a concentration of about 50 to 60% and a jet fuel (for example, JP-4). Using a gas generator G provided with a unit 2, a predetermined amount of aqueous hydrogen peroxide reacts with a catalyst in an ignition supply unit 10 of a decomposition unit 1 to gasify the gas, and the gasified hydrogen peroxide is used as a fuel for ignition. The fuel is supplied to the vicinity of the ignition fuel injection nozzle 31 for supply to stably ignite the jet fuel, and then a predetermined amount of aqueous hydrogen peroxide reacts with a catalyst in the main supply unit 20 to gasify the gas. The hydrogen peroxide solution is caused to flow to a swirler section 33 provided with a swirler near the main fuel injection nozzle 32 to promote atomization of the jet fuel from the main fuel injection nozzle 32, and the hydrogen peroxide solution is supplied to the reaction section 2. Bypass line 4 The hydrogen peroxide solution is supplied directly from is it intended to gasified by thermal decomposition due to the heat from the combustion of the fuel. Also,
Part of the hydrogen peroxide solution gasified in the main supply section 20 is also supplied directly to the reaction section 2.

In this gas generation method, the flow rate of the hydrogen peroxide solution supplied from the ignition supply unit 10 does not fluctuate due to the pressure fluctuation generated in the reaction unit 2 when the jet fuel is ignited. In the main supply section 20, the hydrogen peroxide solution is evenly distributed to the catalyst.

Next, the configuration of the gas generator A will be described in detail with reference to FIGS.

As shown in FIG. 1, the gas generator A includes a hydrogen peroxide solution tank T storing hydrogen peroxide solution.
And a jet fuel tank (not shown) storing jet fuel, and a gas generator G as main components. The hydrogen peroxide water tank T and a predetermined portion of the gas generator G are Connected by a water supply pipe 40,
The jet fuel tank and a predetermined portion of the gas generator G are connected by a fuel pipe 50.

The gas generator G includes a decomposing section 1 for reacting hydrogen peroxide solution with a catalyst to decompose into gas, and a gas generator G coupled to the downstream side of the decomposing section 1 and contained in the gas generated in the decomposing section 1. And a reaction unit 2 for causing a combustion reaction between the oxygen and the jet fuel.

In the example shown in FIG. 2, the disassembly section 1 is disposed on a front surface of the disassembly section main body 3, a cylindrical casing 4 accommodating the disassembly section main body 3, and a cylindrical casing 4 accommodating the disassembly section main body 3. Member 5 composed of a sintered metal plate for uniformly supplying hydrogen peroxide water to the decomposition section main body, and formed in a plate shape arranged on the front surface of the dispersion member 5 and supplying hydrogen peroxide water to the dispersion member 5 And a lid member 7 joined to the front surface of the cylindrical casing 4 that covers the supply member 6 from the front.

The disassembly section main body 3 is a fan-shaped piece 3a having a predetermined thickness.
Are combined with a required number (eight in the example shown in FIG. 3) to form a circular divided body 3A, and the required number of divided bodies 3A (FIG.
(7 in the example shown in FIG. 4) are joined in series to form a columnar shape (see FIG. 4). Also, this fan-shaped piece 3a
As shown in FIG. 5, a ceramic, for example, cordierite is formed in a honeycomb shape, and a catalyst layer 3b containing a noble metal such as platinum or palladium as a catalyst component is formed on the inner surface thereof. Is done. in this case,
In each of the honeycomb-shaped chambers, the contact between the hydrogen peroxide solution and the catalyst is made good and the decomposition reaction is promoted, so that the decomposition section main body 3 is prevented from being lengthened. Fan-shaped piece 3 so that it comes to the shifted position
a, 3a, 3a,... are arranged (see FIGS. 5A and 5B). In other words, the rooms of the front and rear divided bodies 3A, 3A are joined with their phases shifted so that they do not coincide in the front and rear directions in the axial direction. As the catalyst in this case, for example, a three-way catalyst used in exhaust gas treatment of automobiles can be sufficiently used.

In the illustrated example, after the disassembly portion main body 3 is mounted on the cylindrical casing 4, a through hole for inserting a fuel injection nozzle, for example, an ignition fuel injection nozzle 31 is formed in the center thereof. You. The through-hole may be formed in the center by combining fan-shaped pieces whose center is cut off in a predetermined range.

The dispersion member 5 includes a ring-shaped inner dispersion member 5a provided on the inside and a relatively small diameter, and a ring-shaped outer dispersion member 5 provided outside the inner dispersion member 5a.
b. In this case, the grain of the sintered metal used for the inner dispersing member 5a is made fine so as to obtain a large differential pressure, while the grain of the sintered metal used for the outer dispersing member 5b is made coarse. .

Here, the disassembly unit 1 having such a configuration is used.
To explain the function, the portion of the decomposition unit main body 3 to which the hydrogen peroxide water is supplied by the inner dispersion member 5a functions as the ignition supply unit 10, and the part of the decomposition unit main body 3 that is supplied by the outer dispersion member 5b. The part to which the hydrogen oxide water is supplied functions as the main supply part 20. Therefore, the differential pressure of the portion of the supply member 6 relating to the ignition supply section 10 is also increased for the above-described reason. In other words, the reaction part 2
Even if the pressure fluctuates, the flame is not blown out. The differential pressure at that point is appropriately selected according to the characteristics of the gas generator G to be applied. Also,
The differential pressure may be obtained only by the inner dispersion member 5a.

The reaction section 2 comprises a cylindrical liner 8 having a flange at the tip end forming a reaction chamber R, and a cylindrical casing 9 covering the outer periphery of the cylindrical liner 8 at a predetermined interval. And a lid member 9a joined to the rear end of the cylindrical casing. A fuel injection nozzle 30 is mounted on the inlet side of the reaction section 2, and a swirler section 33 having a swirler is formed therearound. In this case, the fuel injection nozzle 30 may be configured such that the ignition fuel injection nozzle 31 and the main fuel injection nozzle 32 are integrally formed, and the ignition fuel injection nozzle 31 and the main fuel injection nozzle 32 are separately provided. May be configured. In FIG. 2, reference numeral 34 denotes a spark plug.

As described above, according to this embodiment, at the time of ignition, fuel and hydrogen peroxide are supplied by the ignition supply unit 10 and the ignition fuel injection nozzle 31 in a predetermined amount (small amount) to ignite the fuel. Then, a predetermined amount (a large amount) of hydrogen peroxide water and fuel is supplied by the main supply unit 20 and the main fuel injection nozzle 32 to burn the fuel, and furthermore, the bypass line 41 is kept in a state where the combustion of the main fuel is stable. Since the hydrogen peroxide solution is sprayed and gasified into the reaction chamber R of the reaction unit 2, the gasification of the hydrogen peroxide solution exceeding the capacity of the decomposition unit 1 can be surely achieved.
The required gasification can be achieved without increasing the axial length of.

In the gasification of the hydrogen peroxide solution in the decomposition section 1, the decomposition section main body 3 having the catalyst layer 3b is constituted by the divided body 3A, and each of the honeycomb-shaped sections as shown in FIGS. Since the divided bodies 3A, 3A, 3A,... Are joined so as to be out of phase with each other so that the room is shifted, gasification of the hydrogen peroxide solution in the decomposition section 1 is promoted. Accordingly, the length of the decomposition section main body 3 for performing the predetermined gasification is significantly reduced as compared with the conventional one.

Although the present invention has been described based on the embodiments, the present invention is not limited to only such embodiments. For example, in this embodiment, a part of the hydrogen peroxide solution is directly sprayed to the reaction part by the bypass line, but the position where the hydrogen peroxide solution is sprayed by the bypass line is not limited to the above. not,
Another location, for example, near the fuel injection nozzle may be used.
Further, the application range of the present invention is not limited to the air turbo ramjet engine, but can be applied to gas generation of other propulsion engines. For example, it can be applied to a torpedo propulsion organization.

[0028]

As described above in detail, in the present invention, the gasification of the low-concentration hydrogen peroxide solution is divided into the ignition supply section and the main supply section, so that the ignition of the fuel is stabilized. In addition to this, an excellent effect of shortening the length of the decomposition section having a catalyst for gasifying the low-concentration hydrogen peroxide solution and shortening the entire length of the engine can be obtained.

According to a preferred embodiment of the present invention, the decomposition section main body is a honeycomb-shaped divided body, and the divided bodies are joined so that the positions of the respective honeycomb-shaped rooms are shifted. Since the gasification efficiency is improved, an excellent effect that the length of the decomposed portion can be significantly reduced as compared with the conventional case can be obtained.

According to another preferred embodiment of the present invention, a part of the hydrogen peroxide solution is supplied to the reaction section by the bypass line and gasified by thermal decomposition, so that the length of the decomposition section is further reduced. The effect that the conversion can be achieved is also obtained.

Further, according to another preferred embodiment of the present invention, since the differential pressure of the ignition supply section is increased, the effect of stabilizing combustion at the time of ignition can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a gas generator to which a gas generation method of the present invention is applied.

FIG. 2 is a sectional view of a main part of the gas generator.

FIG. 3 is a front view of a decomposition unit main body used in the gas generator.

FIG. 4 is a side view of the disassembly section main body.

FIG. 5 is a partially enlarged view of a divided body of the disassembly section main body,
(A) shows the first stage, and (b) shows the second stage.

FIG. 6 is a schematic view of a decomposition section main body used in a conventional gas generator, wherein FIG. 6 (a) shows a front view and FIG.
Shows a side view with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decomposition part 2 Reaction part 3 Decomposition part main body 3A Division body 3a Fan-shaped piece 3b Catalyst layer 4 Cylindrical casing 5 Dispersion member 6 Supply member 7 Cover member 8 Cylindrical liner 9 Cylindrical casing 10 Ignition supply part 20 Main supply part 30 Fuel Injection nozzle 31 Ignition fuel injection nozzle 32 Main fuel injection nozzle 33 Swirler part 34 Spark plug 40 Hydrogen peroxide water pipe 41 Bypass line 50 Fuel pipe A Gas generator G Gas generator T Hydrogen peroxide water tank R Reaction chamber

Claims (7)

(57) [Claims] 1. A gas generating method using a low concentration aqueous hydrogen peroxide, fed separately low concentration aqueous hydrogen peroxide and the main supply portion ignition supply unit, then the said ignition supply unit
Low-concentration hydrogen peroxide water supplied to each of the main supply unit
Gasification with a catalyst . 2. The gas generation method according to claim 1, wherein a part of the low-concentration hydrogen peroxide solution is thermally decomposed and gasified by the reaction heat of the fuel. 3. A method for stably gasifying a low-concentration hydrogen peroxide solution by setting the pressure difference of the hydrogen peroxide solution in the supply portion for ignition to a value not influenced by the pressure fluctuation of the reaction portion. Item 2. The gas generation method according to Item 1. 4. A gas generator for generating gas from a low-concentration hydrogen peroxide solution, comprising a decomposition unit for gasifying the low-concentration hydrogen peroxide solution and a reaction unit for reacting fuel, wherein the decomposition unit is ignited. Supply section and the ignition supply section.
Gas generating apparatus characterized by comprising a main supply section, which is. 5. A decomposing part body which gasifies the low-concentration hydrogen peroxide solution of the decomposing part is a divided body composed of a honeycomb-shaped structure having a catalyst layer formed on an inner surface thereof.
5. The gas generator according to claim 4, wherein the divided members are not filled in a storage member for accommodating the disassembled portion main body so that the respective rooms constituting the honeycomb structure do not coincide with each other in the axial direction. 6. The gas generator according to claim 4, wherein a bypass line for supplying a low-concentration hydrogen peroxide solution to the reaction section is provided. 7. The low-concentration hydrogen peroxide aqueous pressure difference in the supply member and / or the dispersion member for the ignition supply portion is set to a magnitude that is not affected by pressure fluctuations in the reaction portion. The gas generator according to claim 4, characterized in that: