An ignition device for ultra-high speed wind tunnel

Abstract

The present invention discloses an ignition device for an ultra-high-speed wind tunnel. The ignition device includes a gas tank and an ignition tube; the ignition tube includes a secondary ignition tube, a one-way valve, a primary ignition tube and an ignition probe connected in sequence, and the secondary ignition tube is connected to the gas tank through a pipeline. The ignition device uses the ignition probe to ignite the low-pressure gas in the primary ignition tube, and the high-pressure and high-temperature gas product after combustion enters the secondary ignition tube through the one-way valve, and further ignites the ultra-high-pressure gas in the secondary ignition tube; the ultra-high-temperature and high-pressure gas product after combustion in the secondary ignition tube finally enters the gas tank and ignites the ultra-high-pressure gas in the gas tank. The ignition device for an ultra-high-speed wind tunnel of the present invention solves the problem of safe repeated ignition of ultra-high-pressure gas in an ultra-high-speed wind tunnel, and has the advantages of simple structure, reusability, high and low pressure separation, safety assurance, multi-stage connection, and wide applicable pressure range.

Description

Technical Field

[0001] The invention belongs to the technical field of ultra-high speed wind tunnels, and in particular relates to an ignition device for an ultra-high speed wind tunnel. Background Art

[0002] In ultra-high-speed wind tunnel tests, ultra-high-pressure gas needs to be ignited. After the ultra-high-pressure gas burns, the temperature and pressure will increase sharply, which will bring great safety hazards to the ignition device. At present, most ignition devices use electronic components to control ignition, and the ignition device body and the ignition components are connected by insulation. This connection is a weak point in structural strength, which will limit the operating pressure of the ultra-high-speed wind tunnel and ultimately cause the ultra-high-speed wind tunnel to operate in a low-pressure range. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an ignition device for an ultra-high speed wind tunnel.

[0004] The ignition device for an ultra-high-speed wind tunnel of the present invention is characterized in that the ignition device comprises a gas tank and an ignition tube; the ignition tube comprises a secondary ignition tube, a one-way valve, a primary ignition tube and an ignition probe connected in sequence, and the secondary ignition tube is connected to the gas tank through a pipeline;

[0005] Gas tank: used to store ultra-high pressure gas that needs to be ignited;

[0006] Secondary ignition tube: connected to the gas tank, contains the same ultra-high pressure gas as the gas tank, and is used to ignite the ultra-high pressure gas in the gas tank;

[0007] First-stage ignition tube: initially filled with low-pressure gas, the combustion products of the low-pressure gas are used to ignite the ultra-high-pressure gas in the second-stage ignition tube;

[0008] One-way valve: controls the one-way flow of low-pressure gas to ultra-high-pressure gas;

[0009] Ignition probe: used to ignite the low-pressure gas in the first-stage ignition tube.

[0010] The maximum working pressure of the gas tank is 1000MPa.

[0011] The maximum working pressure of the one-way valve is 1000MPa.

[0012] The working pressure limit of the secondary ignition tube is 1000MPa.

[0013] The ignition probe is an electric explosion wire or a spark plug.

[0014] The first-level ignition tube and the ignition probe are insulated.

[0015] The gas pressure in the secondary ignition tube is higher than the gas pressure in the primary ignition tube, and the pressure ratio is less than or equal to 20.

[0016] The ignition device for an ultra-high-speed wind tunnel of the present invention utilizes an ignition probe for ignition to ignite the low-pressure fuel gas in a primary ignition tube, and the high-pressure and high-temperature gas product after combustion enters a secondary ignition tube through a one-way valve, and further ignites the ultra-high-pressure fuel gas in the secondary ignition tube; the ultra-high-temperature and high-pressure gas product after combustion in the secondary ignition tube eventually enters a fuel tank, and ignites the ultra-high-pressure fuel gas in the fuel tank.

[0017] The ignition device for an ultra-high-speed wind tunnel of the present invention solves the problem of safe repeated ignition of ultra-high-pressure fuel gas in an ultra-high-speed wind tunnel, and has the advantages of simple structure, reusability, separation of high and low pressures, safety assurance, multi-stage connection, and wide applicable pressure range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic structural diagram of an ignition device for an ultra-high-speed wind tunnel according to the present invention.

[0019] In the figure, 1. gas tank, 2. secondary ignition tube, 3. one-way valve, 4. primary ignition tube, 5. ignition probe, 6. ignition tube. Specific implementation plan

[0020] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, the ignition device for an ultra-high-speed wind tunnel of the present invention comprises a gas tank 1 and an ignition tube 6; the ignition tube 6 comprises a secondary ignition tube 2, a one-way valve 3, a primary ignition tube 4 and an ignition probe 5 connected in sequence, and the secondary ignition tube 2 is connected to the gas tank 1 through a pipeline;

[0022] Gas tank 1: used to store ultra-high pressure gas that needs to be ignited;

[0023] Secondary ignition tube 2: connected to gas tank 1, containing the same ultra-high pressure gas as gas tank 1, used to ignite the ultra-high pressure gas in gas tank 1;

[0024] The first-stage ignition tube 4 is initially filled with low-pressure gas, and the combustion products of the low-pressure gas are used to ignite the ultra-high-pressure gas in the second-stage ignition tube 2;

[0025] One-way valve 3: controls the one-way flow of low-pressure gas to ultra-high-pressure gas;

[0026] Ignition probe 5: used to ignite the low-pressure fuel gas in the first-stage ignition tube 4.

[0027] The maximum working pressure of the gas tank 1 is 1000 MPa.

[0028] The maximum working pressure of the one-way valve 3 is 1000 MPa.

[0029] The maximum working pressure of the secondary ignition tube 2 is 1000 MPa.

[0030] The ignition probe 5 is an electric explosion wire or a spark plug.

[0031] The first-level ignition tube 4 and the ignition probe 5 are insulated from each other.

[0032] The gas pressure in the secondary ignition tube 2 is higher than the gas pressure in the primary ignition tube 4, and the pressure ratio is less than or equal to 20.

[0033] Example 1

[0034] The operation process of the ignition device for the ultra-high speed wind tunnel of the present invention is as follows:

[0035] a. Fill the gas tank 1 and the secondary ignition tube 2 with the ultra-high pressure gas required for the test;

[0036] b. Fill the first-level ignition tube 4 with low-pressure gas;

[0037] c. Use the ignition probe 5 to ignite the low-pressure fuel gas in the primary ignition tube 4, and the high-pressure and high-temperature gas product after combustion enters the secondary ignition tube 2 through the one-way valve 3, and further ignites the ultra-high-pressure fuel gas in the secondary ignition tube 2; the ultra-high-temperature and high-pressure gas product after combustion in the secondary ignition tube 2 eventually enters the gas tank 1, and ignites the ultra-high-pressure fuel gas in the gas tank 1.

Claims

1. An ignition device for an ultra-high speed wind tunnel, characterized in that: The ignition device comprises a gas tank (1) and an ignition tube (6); the ignition tube (6) comprises a secondary ignition tube (2), a one-way valve (3), a primary ignition tube (4) and an ignition probe (5) connected in sequence, and the secondary ignition tube (2) is connected to the gas tank (1) through a pipeline; Gas tank (1): used to store ultra-high pressure gas to be ignited; Secondary ignition tube (2): connected to the gas tank (1), containing the same ultra-high pressure gas as the gas tank (1), and used to ignite the ultra-high pressure gas in the gas tank (1); The first-stage ignition tube (4) is initially filled with low-pressure gas, and the combustion products of the low-pressure gas are used to ignite the ultra-high-pressure gas in the second-stage ignition tube (2); One-way valve (3): controls the one-way flow of low-pressure gas to ultra-high-pressure gas; Ignition probe (5): used to ignite the low-pressure gas in the first-stage ignition tube (4); The ignition device utilizes an ignition probe (5) to ignite the low-pressure gas in the primary ignition tube (4); the high-pressure and high-temperature gas product after combustion enters the secondary ignition tube (2) through a one-way valve (3) and further ignites the ultra-high-pressure gas in the secondary ignition tube (2); the ultra-high-temperature and high-pressure gas product after combustion in the secondary ignition tube (2) finally enters the gas tank (1) and ignites the ultra-high-pressure gas in the gas tank (1).

2. The ignition device for an ultra-high speed wind tunnel according to claim 1, characterized in that: The maximum working pressure of the gas tank (1) is 1000 MPa.

3. The ignition device for an ultra-high speed wind tunnel according to claim 1, characterized in that: The maximum working pressure of the one-way valve (3) is 1000 MPa.

4. The ignition device for an ultra-high speed wind tunnel according to claim 1, characterized in that: The maximum working pressure of the secondary ignition tube (2) is 1000 MPa.

5. The ignition device for an ultra-high speed wind tunnel according to claim 1, characterized in that: The ignition probe (5) is an electric explosion wire or a spark plug.

6. The ignition device for an ultra-high speed wind tunnel according to claim 1, characterized in that: The primary ignition tube (4) and the ignition probe (5) are insulated from each other.

7. The ignition device for an ultra-high speed wind tunnel according to claim 1, characterized in that: The gas pressure in the secondary ignition tube (2) is higher than the gas pressure in the primary ignition tube (4), and the pressure ratio is less than or equal to 20.

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