KR102005428B1 - Liquid fuel ignition apparatus - Google Patents

Abstract

A liquid fuel ignition apparatus according to an embodiment includes a fuel tank for containing hydrocarbon fuel in a liquid state; An air tank for containing air; A premixing chamber for receiving and mixing liquid fuel and air from the fuel tank and the air tank; And a fuel injection nozzle connected to the mixing chamber and injecting a mixture of the liquid fuel and air into the interior of the engine.

Description

[0001] LIQUID FUEL IGNITION APPARATUS [0002]

The following description relates to a liquid fuel ignition device.

The air intake engine is a propulsion engine that sucks air and supplies the air to the combustion chamber by separately discharging the air in the air to burn the injected fuel to obtain thrust, and can be used only in an atmosphere where air exists. In the air intake engine, the engine that compresses the air by the ram effect at the supersonic flying speed (Mach number 2 to 4) is called a ramjet engine. The engine is distinguished from the ramjet engine in which the combustion in the subsonic state occurs, (SCRAMJET, Supersonic Combustion RAMJET engine) is a ramjet engine that keeps the combustion state at a supersonic state. Scramjet engines are known to be suitable for hypersonic (at Mach 5 and above).

Hydrogen is used as a fuel for scramjet engines, but hydrocarbon fluids are attracting attention because they are less practical.

When the airplane is flying at supersonic speed, the temperature rises to more than 1500 K, so that the liquid fuel is thermally decomposed into a gaseous state, and the fuel that has been changed to the gaseous state can be injected into the combustion chamber without additional vaporizer.

However, there is a problem that the liquid fuel in the low Mach-Zeh rate is difficult to ignite normally in a supersonic flow without a separate vaporizer.

Therefore, it is necessary to develop a liquid fuel ignition device in which the liquid fuel can be vaporized and injected into the engine irrespective of the speed of the air vehicle.

The background art described above is possessed or acquired by the inventor in the derivation process of the present invention, and can not be said to be a known art disclosed in general public before application of the present invention.

An object of one embodiment is to provide a liquid fuel ignition device.

A liquid fuel ignition apparatus according to an embodiment includes a fuel tank for containing hydrocarbon fuel in a liquid state; An air tank for containing air; A premixing chamber for receiving and mixing liquid fuel and air from the fuel tank and the air tank; And a fuel injection nozzle connected to the mixing chamber and injecting a mixture of the liquid fuel and air into the interior of the engine.

The liquid fuel ignition apparatus according to an embodiment may further include: a speed measuring device for measuring a flying speed of the engine; A first air flow pipe for guiding air from the air tank to the premixing chamber; A first valve installed in the first air flow pipe; And a control unit operable to operate the opening and closing of the first valve on the basis of the flight speed measured by the speed measuring device, wherein when the flight speed is less than the set speed, And the mixture is injected into the engine by supplying air to the premixing chamber, and when the flying speed is equal to or higher than the set speed, the first valve is closed, Only the fuel can be injected.

A liquid fuel ignition apparatus according to an embodiment includes a methane tank for containing methane; An ignition chamber for receiving methane from the methane tank; An ignition plug installed in the ignition chamber for combusting the methane; And an ignition torch for supplying the combusted methane from the ignition chamber to the interior of the engine.

The liquid fuel ignition apparatus according to an embodiment may further include an oxygen tank connected to the ignition chamber to supply oxygen.

The liquid fuel ignition apparatus according to an embodiment may further include a chlorination apparatus installed in the ignition torch.

The liquid fuel ignition apparatus according to an embodiment includes a temperature sensor for measuring a temperature of the ignition chamber; A second air flow pipe for guiding air from the air tank to the ignition chamber; And a second valve installed in the second air flow pipe. When the temperature of the ignition chamber is over a predetermined temperature, the control unit may open the second valve to ignite the air, And if the temperature of the ignition chamber is below the set temperature, the second valve can be closed.

According to the liquid fuel ignition apparatus of one embodiment, when the air vehicle is started or is flying at low Mach number, the vaporization of the liquid fuel can be promoted to facilitate the ignition.

According to an embodiment of the present invention, air can be supplied to prevent the temperature of the ignition chamber from being overheated.

1 is a block diagram of a liquid fuel ignition apparatus according to an embodiment.
2 is a block diagram of a liquid fuel ignition apparatus according to one embodiment.

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

The components included in any one embodiment and the components including common functions will be described using the same names in other embodiments. Unless otherwise stated, the description of any one embodiment may be applied to other embodiments, and a detailed description thereof will be omitted in the overlapping scope.

1 is a block diagram of a liquid fuel ignition apparatus according to one embodiment, and Fig. 2 is a block diagram of a liquid fuel ignition apparatus according to an embodiment.

Referring to Figs. 1 and 2, the liquid fuel ignition apparatus 1 according to one embodiment can inject liquid fuel into the engine 2 of the air vehicle and burn it.

For example, the engine 2 may be a scramjet engine that can be mounted on a vehicle. For example, the engine 2 can be divided into an upper frame 221 and a lower frame 222 on the upper and lower sides with respect to the inner space. For example, the internal space of the engine 2 may include an inlet portion 211 into which external air flows, an ignition portion 212 through which fuel is ignited, and a discharge portion 213 through which the combusted fuel is discharged. have.

For example, the liquid fuel ignition apparatus 1 includes a fuel supply device 12, an air tank 11, an ignition device 13, a control section 14, a speed measurement sensor 151, a first valve 161, A temperature sensing sensor 152 and a second valve 162.

The fuel supply device 12 is installed on the upper part of the upper frame 221 of the engine 2 and is capable of injecting the liquid fuel into the interior of the engine 2. [

For example, the fuel supply device 12 may include a fuel tank 121, a premixing chamber 122, and an injection nozzle 123.

The fuel tank 121 may be a tank for containing the liquid fuel. For example, the liquid fuel may be a liquid hydrocarbon fuel. For example, the liquid fuel contained in the fuel tank 121 may be transferred to the premixing chamber 122 through piping connected between the premixing chambers 122.

The pre-mixing chamber 122 can mix the liquid fuel delivered from the fuel tank 121 with the air received from the air tank 11 to be described later. According to the premixing chamber 122, the liquid fuel can be mixed in advance before being injected into the internal space of the engine 2, so that the vaporizing efficiency of the liquid fuel injected into the internal space of the engine 2 is improved .

The injection nozzle 123 can inject liquid fuel mixed with air in the premixing chamber 122 into the internal space of the engine. For example, the injection nozzle 123 may be installed at the inlet 211 of the engine 2.

The air tank 11 may be a tank for containing air. For example, the air tank 11 can transfer the received air to the premixing chamber 122 and to the ignition chamber 133, which will be described later.

For example, the air tank 11 may include a first air flow pipe 111 connected between the premixing chambers 122 for transferring air, and a second air pipe (not shown) connected between the ignition chambers 133 to transfer air And may include a flow piping 112.

The ignition device 13 can ignite the vaporized liquid fuel injected in the internal space of the engine 2. [

For example, the ignition device 13 may include a methane tank 131, an oxygen tank 132, an ignition chamber 133, an ignition plug 134, an ignition torch 135,

The methane tank 131 may be a tank for containing methane. For example, the methane tank 131 may deliver the received methane to the ignition chamber 133 through a conduit connected between the ignition chambers 133.

The oxygen tank 132 may be a tank for storing oxygen. For example, the oxygen tank 132 may deliver the received oxygen to the ignition chamber 133 through a conduit connected between the ignition chambers 133.

The ignition chamber 133 is capable of receiving methane and oxygen from the methane tank 131 and the oxygen tank 132 and is capable of receiving the methane and oxygen from the methane tank 131 and the oxygen tank 132 before the mixture gas of methane and oxygen is injected into the internal space of the engine 2 Can be burned.

According to the oxygen delivered by the oxygen tank 132, the combustion of methane can be facilitated.

For example, the ignition chamber 133 can receive air from the air tank 11 through the second air flow pipe 112, and the ignition chamber 133 is overheated through the delivered air, It is possible to prevent the peripheral control apparatus including the control unit 133 from failing.

The spark plug 134 may be installed in the ignition chamber 133 to perform ignition of meta gas and oxygen within the ignition chamber 133.

The ignition torch 135 is capable of receiving combustion methane and oxygen gas in the ignition chamber 133 and injecting it into the internal space of the engine 2.

For example, the ignition torch 135 may be installed in the ignition portion 212 of the engine 2. Accordingly, the liquid fuel injected and vaporized in the vicinity of the inflow portion 211 reaches the ignition portion 212 and can be normally burned.

The chlorination apparatus 136 can keep the shape of the flame of methane generated in the ignition torch 135 constant, and can prevent the flame from turning off to ensure the stability of combustion.

The control unit 14 can control the liquid fuel ignition apparatus 1 to adjust the output and efficiency of the engine 2. [ For example, the control unit 14 controls the operation of the first valve 161 and the second valve 162, which will be described later, based on the data measured by the speed measuring sensor 151 and the temperature sensing sensor 152 Can be controlled.

The speed measuring sensor 151 may be a sensor for measuring the speed or Mach number of the air vehicle on which the engine 2 is mounted. For example, the speed measuring sensor 151 may be a sensor for measuring a static pressure pipe built in a flight body.

The first valve 161 may be provided in the first air flow pipe 111 to block or allow the flow of air between the air tank 11 and the premixing chamber 122.

For example, when the speed measured by the speed measuring sensor 151 is lower than the set speed, the controller 14 opens the first valve 161 to supply air to the premixing chamber 122, So that the mixture of the liquid fuel and the air is injected into the internal space of the combustion chamber.

Here, the "set speed" may be a critical speed for determining whether or not the liquid fuel is vaporized smoothly when the liquid fuel is injected into the engine 2 alone, the temperature being very high.

For example, when the speed measured by the speed measuring sensor 151 is equal to or higher than the set speed, the controller 14 may close the first valve 161 to inject only the liquid fuel into the internal space of the engine 2 have.

According to the above structure, when the airplane is flying at a speed higher than a set speed at which the liquid fuel can be smoothly vaporized, only the liquid fuel can be injected into the engine 2,

On the other hand, when the engine 2 is started or when the airplane is flying at a low machining speed of less than the set speed, the air is mixed and injected in advance to facilitate the vaporization of the liquid fuel, .

The temperature sensing sensor 152 can be mounted in the ignition chamber 133 to measure the temperature of the ignition chamber 133.

The second valve 162 may be installed in the second air flow pipe 112 to block or allow the flow of air between the air tank 11 and the ignition chamber 133.

For example, the control unit 14 can open the second valve 162 to supply air to the ignition chamber 133 when the temperature measured at the temperature sensor 152 is equal to or higher than the set temperature, The second valve 162 may be closed and the air supply to the ignition chamber 133 may be blocked.

Here, the "set temperature" may be a temperature at which the temperature of the ignition chamber 133 is overheated, which may cause malfunction and malfunction of the peripheral control device.

According to the above structure, the liquid fuel ignition apparatus 1 can cool the ignition chamber 133 by utilizing air as a cooling fluid when the ignition chamber 133 is overheated, so that the ignition chamber 133 and the periphery It is possible to prevent the control apparatus of Fig.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. For example, it is contemplated that the techniques described may be performed in a different order than the described methods, and / or that components of the described structures, devices, and the like may be combined or combined in other ways than the described methods, Appropriate results can be achieved even if they are replaced or replaced.

Therefore, other implementations, other embodiments and equivalents to the claims are within the scope of the following claims.

Claims (6)

A fuel tank for containing a hydrocarbon fuel in a liquid state;
An air tank for containing air;
A premixing chamber for receiving liquid fuel and air from the fuel tank and the air tank and for mixing the liquid fuel and air;
A fuel injection nozzle connected to the mixing chamber for injecting a mixture of the liquid fuel and air into the interior of the engine;
A speed measuring device for measuring a flying speed of the engine;
A first air flow pipe for guiding air from the air tank to the premixing chamber;
A first valve installed in the first air flow pipe; And
And a control unit for operating the opening and closing of the first valve based on the flying speed measured by the speed measuring device,
Wherein the control unit opens the first valve and supplies air to the premixing chamber when the flight speed is less than the set speed and the mixture of the liquid fuel and air is injected into the engine, , Only the liquid fuel is injected into the engine by closing the first valve.
delete The method according to claim 1,
A methane tank containing methane;
An ignition chamber for receiving methane from the methane tank;
An ignition plug installed in the ignition chamber for igniting the methane in the ignition chamber;
And an ignition torch for supplying the combusted methane from the ignition chamber to the interior of the engine.
The method of claim 3,
And an oxygen tank connected to the ignition chamber for supplying oxygen.
5. The method of claim 4,
Further comprising a chlorination device installed in said ignition torch.
The method of claim 3,
A temperature sensor for measuring the temperature of the ignition chamber;
A second air flow pipe for guiding air from the air tank to the ignition chamber; And
And a second valve installed in the second air flow pipe,
Wherein the control unit opens the second valve to supply air to the ignition chamber when the temperature of the ignition chamber is over the set temperature and if the temperature of the ignition chamber is below the set temperature, Closing the liquid fuel ignition device.

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