Combustion testing device

Abstract

The invention relates to a combustion testing device, which comprises a casing and an observation plate, one end of the casing is fixedly connected with a diffuser, the other end of the casing is fixedly connected with one end of a flame tube, the other end of the flame tube is fixedly connected with an oil supply pipe, the flame tube and the oil supply pipe are accommodated in the casing, the surface of the flame tube is provided with a light hole and an air blowing hole, and the observation plate is transparent. The observation plate covers the light hole, one end of the blowing hole is aligned with the surface of the observation plate, and the other end of the blowing hole is communicated with the output end of the air source device. By adopting the technical scheme provided by the invention, when a combustion test is carried out in the flame tube, an operator can observe the combustion state in the flame tube in detail through the transparent observation plate and measure the combustion data in the flame tube, and compressed airflow fed through the blowing hole flows through the surface of the observation plate; and the surface of the observation plate can be prevented from being stained by fluorescent particles, so that an operator can observe a real combustion state, and real related combustion data in the flame tube can be measured and obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engines, and in particular relates to a combustion testing device. Background Art

[0002] The combustion chamber is the core component of an aircraft engine. The structural characteristics of the combustion chamber are closely related to the flow field state within the combustion chamber. Therefore, when designing the structure of the combustion chamber, it is necessary to simulate the combustion state of the combustion chamber specimen and measure and obtain real combustion flow field data as much as possible to provide data support for improving the structural design of the combustion chamber, so as to facilitate designers to improve the design of the combustion chamber structure.

[0003] For example, patent publication number "CN119290314A" discloses a method for simulating and testing the flow field in a low-emission gas turbine combustor. The method is used to conduct experimental tests in a direction perpendicular to the central axis of the swirler to obtain the flow field characteristics at the swirler outlet and the combustor head. The patent's technical solution first utilizes a PIV test system to experimentally test the flow field in the engine's coaxial staged combustor. Second, it couples a simplified natural gas chemical reaction mechanism with a CFD computational model to numerically calculate the flow field characteristics in the engine's coaxial staged combustor. Third, it explores new numerical calculation methods for the engine's combustor flow field. In the prior art, regardless of how a flame tube is tested for combustion, the operator must visually observe the combustion state. Therefore, a corresponding observation window should be provided on the surface of the flame tube. However, when conducting combustion tests inside the flame tube, since the combustion process simulates a real-world scenario, the simulated combustion process generates a large amount of fluorescent particles. As the combustion process continues, the fluorescent particles continuously adhere to the surface of the observation window, causing contamination of the observation window, partially obstructing the operator's line of sight, and affecting the authenticity and reliability of the operator's measured data. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a combustion testing device.

[0005] The present invention provides a combustion testing device, comprising a casing and an observation plate, wherein one end of the casing is fixedly connected to a diffuser, the other end of the casing is fixedly connected to one end of the flame tube, the other end of the flame tube is fixedly connected to an oil supply pipe, and the flame tube and the oil supply pipe are both accommodated in the casing, a light-transmitting hole and an air-blowing hole are provided on the surface of the flame tube, the observation plate is transparent, and the observation plate covers the light-transmitting hole, one end of the air-blowing hole is aligned with the surface of the observation plate, and the other end of the air-blowing hole is connected to the output end of a gas source device.

[0006] The combustion test device further includes a first sealing gasket, which is clamped between the casing and the diffuser, between the casing and the flame tube, and between the flame tube and the oil supply pipe.

[0007] The flame tube is also fixedly connected to the buckle frame, and the edge of the observation plate is clamped between the surface of the flame tube and the buckle frame.

[0008] The material of the observation plate is quartz glass.

[0009] The combustion test device further includes a second sealing gasket, which is sandwiched between the gusset plate and the edge of the observation plate.

[0010] The combustion test device further comprises a light guide plate, both ends of which are fixedly connected to the inner wall surface of the flame tube, and the light guide plate is shielded at each corner of the inner wall surface of the flame tube.

[0011] The light guide plate is made of quartz glass.

[0012] The inner wall surface of the flame tube is also blackened.

[0013] The cross section of the flame tube is fan-shaped.

[0014] The air source equipment is an air compressor.

[0015] The beneficial effect of the present invention is that: by adopting the technical solution provided by the present invention, when conducting a combustion test in a flame tube, the operator can observe the fuel combustion state in the flame tube in detail through the transparent observation plate, and measure the flow field state in the flame tube through an optical measurement method. When observing the combustion situation in the flame tube, the compressed air flow sent in through the blowing hole flows through the surface of the observation plate, which can prevent the dust generated by the combustion from adhering to and blocking the surface of the observation plate, and can also prevent the fluorescent particles generated during the combustion from contaminating the surface of the observation plate, so that the operator can observe the real combustion state and measure the real flow field state in the flame tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of the present invention;

[0017] Figure 2 According to the present invention Figure 1 Sectional view cut along the AA plane;

[0018] Figure 3 This invention Figure 1 B-direction view;

[0019] Figure 4 According to the present invention Figure 3 Sectional view of the CC plane;

[0020] Figure 5 According to the present invention Figure 2 Cross-sectional view taken along the middle DD plane.

[0021] In the figure: 1-casing, 2-observation panel, 3-diffuser, 4-flame tube, 5-fuel supply pipe, 6-air blowing hole, 7-first sealing gasket, 8-buckle frame, 9-second sealing gasket, 10-light guide plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited to the above;

[0023] The present invention provides a combustion test device, such as Figures 1 to 5 As shown, it includes a casing 1 and an observation plate 2, one end of the casing 1 is fixedly connected to the diffuser 3, the other end of the casing 1 is fixedly connected to one end of the flame tube 4, the other end of the flame tube 4 is fixedly connected to the oil supply pipe 5, and the flame tube 4 and the oil supply pipe 5 are both accommodated in the casing 1, and the surface of the flame tube 4 is provided with a light-transmitting hole and an air blowing hole 6, the observation plate 2 is transparent, and the observation plate 2 covers the light-transmitting hole, one end of the air blowing hole 6 is aligned with the surface of the observation plate 2, and the other end of the air blowing hole 6 is connected to the output end of the gas source equipment.

[0024] By adopting the technical solution provided by the present invention, when a combustion test is carried out in a flame tube, the operator can observe the fuel combustion state in the flame tube in detail through the transparent observation plate, and measure the flow field state in the flame tube by an optical measurement method. When observing the combustion situation in the flame tube, the compressed air flow sent in through the blowing hole flows through the surface of the observation plate, which can prevent the dust generated by the combustion from adhering to and blocking the surface of the observation plate, and can also prevent the fluorescent particles generated during the combustion from contaminating the surface of the observation plate, so that the operator can observe the real combustion state and measure the real flow field state in the flame tube.

[0025] Specifically, the combustion test device also includes a first sealing gasket 7, which is clamped between the casing 1 and the diffuser 3, between the casing 1 and the flame tube 4, and between the flame tube 4 and the fuel supply pipe 5. The flame tube 4 is also fixedly connected to the buckle frame 8, and the edge of the observation panel 2 is clamped between the surface of the flame tube 4 and the buckle frame 8.

[0026] In addition, the material of the observation plate 2 is quartz glass, thereby preventing burns to the observation plate during the combustion process. The combustion test device also includes a second sealing gasket 9, which is sandwiched between the gusset plate and the edge of the observation plate 2.

[0027] The combustion test device also includes a light guide plate 10, both ends of which are fixed to the inner wall of the flame tube 4. The light guide plate 10 is made of quartz glass. This allows light to penetrate all corners of the flame tube, avoiding blind spots in these areas and facilitating observation for the operator.

[0028] Specifically, the inner wall of the flame tube 4 is blackened to reduce the impact of other stray light on measurements within the flame tube. The cross-section of the flame tube 4 is fan-shaped. The air source is an air compressor.

Claims

1. A combustion test device, characterized in that: The invention comprises a casing (1) and an observation plate (2), wherein one end of the casing (1) is fixedly connected to a diffuser (3), the other end of the casing (1) is fixedly connected to one end of a flame tube (4), the other end of the flame tube (4) is fixedly connected to an oil supply pipe (5), and the flame tube (4) and the oil supply pipe (5) are both accommodated in the casing (1), and a light-transmitting hole and an air-blowing hole (6) are provided on the surface of the flame tube (4), the observation plate (2) is transparent, and the observation plate (2) covers the light-transmitting hole, one end of the air-blowing hole (6) is aligned with the surface of the observation plate (2), and the other end of the air-blowing hole (6) is connected to the output end of the gas source device.

2. A combustion test device according to claim 1, characterized in that: The combustion test device further comprises a first sealing gasket (7), which is clamped between the casing (1) and the diffuser (3), between the casing (1) and the flame tube (4), and between the flame tube (4) and the oil supply pipe (5).

3. A combustion test device according to claim 1, characterized in that: The flame tube (4) is also fixedly connected to the buckle frame (8), and the edge of the observation plate (2) is clamped between the surface of the flame tube (4) and the buckle frame (8).

4. A combustion test device according to claim 1 or 3, characterized in that: The material of the observation plate (2) is quartz glass.

5. A combustion test device according to claim 3, characterized in that: The combustion test device further comprises a second sealing gasket (9), which is clamped between the gusset plate and the edge of the observation plate (2).

6. A combustion testing device according to claim 1, characterized in that: The combustion test device further comprises a light guide plate (10), both ends of which are fixedly connected to the inner wall surface of the flame tube (4), and the light guide plate (10) is shielded at each corner of the inner wall surface of the flame tube (4).

7. A combustion testing device according to claim 6, characterized in that: The material of the light guide plate (10) is quartz glass.

8. A combustion testing device according to claim 1, 2, 3 or 6, characterized in that: The inner wall surface of the flame tube (4) is also blackened.

9. A combustion testing device according to claim 8, characterized in that: The flame tube (4) is fan-shaped when viewed from above.

10. The combustion test device according to claim 1, characterized in that: The air source equipment is an air compressor.

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