Atomization characteristic test device capable of replacing aviation fuel in low-temperature and low-pressure environment of atomization device

Abstract

The invention provides a device for testing the atomization characteristic of an atomization device capable of replacing aviation fuel in a low-temperature and low-pressure environment, and the device comprises an atomization assembly, the atomization assembly is provided with a constant-volume bomb, the top end of the constant-volume bomb is provided with a nozzle, and a swirler is disposed above the nozzle; the oil supply system is located at one end of the atomization assembly and used for providing aviation fuel. The temperature control assembly and the pressure control assembly are both connected with the atomization assembly; the atomization characteristic detection assemblies are located on the two sides of the atomization assembly. The atomization device can replace an aviation fuel atomization characteristic test device in the low-temperature and low-pressure environment, and high-pressure airflow rotates at a high speed through the swirler, so that efficient atomization of the nozzle is achieved; meanwhile, a constant volume bomb under low-temperature and low-pressure conditions is created through a multi-stage refrigeration and air extraction device, so that actual working conditions are simulated, and atomization characteristic data are obtained.

Description

Technical Field

[0001] The invention relates to the field of aviation fuel testing, in particular to an atomization device capable of replacing an aviation fuel atomization characteristic test device under a low temperature and low pressure environment. Background Art

[0002] With the rapid development of the aviation industry, the demand for aviation fuel that is efficient, environmentally friendly and adaptable to extreme environmental conditions is becoming increasingly urgent. In a high-altitude, low-temperature and low-pressure environment, the atomization and mixing efficiency of traditional aviation fuels will drop significantly, resulting in a decrease in fuel evaporation and chemical reaction rates, which in turn affects the ignition and stable operation of the engine. The swirl atomizer uses a high-speed rotating jet generated by a swirler to refine the fuel sprayed from the nozzle into smaller droplets, increase the contact area between the fuel and the air, and use alternative aviation fuels that are more suitable for high-altitude extreme environments, so that the fuel evaporates and burns faster and more evenly. Therefore, a swirl atomizer that can replace aviation fuel in a low-temperature and low-pressure environment is a hot topic of current research. The swirl atomizer and characteristic test system introduced in the present invention are designed to address this demand, and are intended to solve the atomization problem of alternative aviation fuels in a low-temperature and low-pressure environment, and provide a characteristic test system. Summary of the invention

[0003] The purpose of the present invention is to provide a swirl atomization device and a characteristic test system for alternative aviation fuel in a low-temperature and low-pressure environment. The high-pressure airflow rotates at high speed through the swirler to achieve efficient atomization of the nozzle; at the same time, a constant volume bomb with low-temperature and low-pressure conditions is created through a multi-stage refrigeration and exhaust device to simulate actual working conditions and obtain atomization characteristic data.

[0004] To achieve the above-mentioned object, the present invention provides an atomization device for testing the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, comprising an atomization component, a constant volume bomb is arranged on the atomization component, a nozzle is arranged at the top of the constant volume bomb, and a swirler is also arranged above the nozzle; The fuel supply system is located at one end of the atomizing assembly and is used to provide aviation fuel; The temperature control component and the pressure control component are both connected to the atomization component; The atomization characteristic detection components are located on both sides of the atomization component.

[0005] Preferably, the atomization characteristic detection component is provided with a receiving machine and a transmitter located on both sides of the constant volume bomb, and the atomization characteristic detection component is also provided with an industrial camera located beside the constant volume bomb for photographing the atomization cone angle.

[0006] Preferably, the oil supply system is provided with an oil tank, and an overflow valve, a high-pressure oil pump, an oil filter and an air valve are sequentially arranged between the oil tank and the constant volume bomb, and they are connected by pipelines.

[0007] Preferably, the temperature control component is provided with an expander, a refrigerator and a heat exchanger.

[0008] Preferably, the pressure control assembly is provided with a vacuum machine and a fuel separator connected to a constant volume bomb.

[0009] Preferably, the compressor is directly connected to the constant volume bomb to provide high-pressure gas to drive the cyclone to rotate.

[0010] Therefore, the present invention adopts the above-mentioned atomization device to replace the aviation fuel atomization characteristics test device under low temperature and low pressure environment. The high-pressure airflow rotates at high speed through the cyclone to achieve efficient atomization of the nozzle; at the same time, a constant volume bomb with low temperature and low pressure conditions is created through a multi-stage refrigeration and exhaust device to simulate the actual working conditions and obtain atomization characteristics data. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a test device for atomization characteristics of alternative aviation fuels under low temperature and low pressure environment of an atomization device of the present invention.

[0012] Reference numerals 1. Atomizing assembly; 11. Constant volume bomb; 12. Nozzle; 13. Cyclone; 14. Compressor; 2. Oil supply system; 21. Oil tank; 22. Overflow valve; 23. High pressure oil pump; 24. Oil filter; 25. Air valve; 3. Temperature control component; 31. Expander; 32. Refrigerator; 33. Heat exchanger; 4. Pressure control component; 41. Vacuum machine; 42. Fuel separator; 5. Atomization characteristic detection component; 51. Receiving machine; 52. Transmitter; 53. Industrial camera. DETAILED DESCRIPTION

[0013] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0014] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0015] Embodiment 1 The present invention provides an atomization device under low temperature and low pressure environment, which can replace the atomization characteristics of aviation fuel. The atomization device comprises an atomization component 1, a fuel supply system 2 is located at one end of the atomization component 1 for providing aviation fuel; a temperature control component 3 and a pressure control component 4 are both connected to the atomization component 1; and an atomization characteristic detection component 5 is located on both sides of the atomization component 1.

[0016] The atomization characteristic detection component 5 is provided with a receiving machine 51 and a transmitter 52 (laser particle size analyzer) located on both sides of the constant volume bomb 11. The atomization characteristic detection component 5 is also provided with an industrial camera 53 located beside the constant volume bomb 11 for photographing the atomization cone angle.

[0017] The fuel supply system 2 is provided with a fuel tank 21, and an overflow valve 22, a high-pressure fuel pump 23, an oil filter 24 and an air valve 25 are sequentially provided between the fuel tank 21 and the constant volume bomb 11, and they are connected by pipelines. The fuel tank 21 is used to store the fuel used in the experiment, and the high-pressure fuel pump 23 provides stable high-pressure fuel to ensure that the fuel can enter the nozzle 12 at high pressure. The oil filter 24 is used to filter impurities in the fuel to ensure the purity of the fuel. The air valve (ball valve) 25 controls the flow direction and flow of the fuel to ensure the safety of the system.

[0018] The temperature control component 3 is provided with an expander 31, a refrigerator 32 and a heat exchanger 33. In order to achieve a low temperature environment in the experimental system, the system adopts a multi-stage refrigeration solution. The specific implementation method is as follows: Precooling treatment of the expander 31: The cold air generated at the outlet of the expander 31 is used as a precooling air source to preliminarily reduce the temperature of the air flowing into the constant volume bomb 11.

[0019] Cooling by heat exchanger 33: The cold air at the outlet of expander 31 enters heat exchanger 33 and exchanges heat with the outside air to further reduce the air temperature. This process ensures a stable supply of cold air and creates conditions for subsequent deep cooling.

[0020] Secondary cooling of refrigerator 32: A refrigerator 32 is installed above the heat exchanger. Through the secondary refrigeration system, the air temperature can be reduced to 50°C, ensuring that the constant volume bomb 11 reaches the ultra-low temperature environment required for the experiment.

[0021] Cold air injection: The cooled air is injected from the cold air inlet above the constant volume bomb 11, and the interior of the constant volume bomb 11 is kept at a low temperature. The air flow rate and the cooling effect are monitored and adjusted in real time by a thermometer to ensure temperature stability.

[0022] The pressure control assembly 4 is provided with a vacuum machine 41 and a fuel separator 42 connected to the constant volume bomb 11. The system realizes a low pressure environment through the vacuum machine 41 and the fuel separator 42. The specific operation steps are as follows: Vacuum exhaust: The vacuum port below the constant volume bomb 11 is connected to the vacuum machine 41, and the air pressure inside the constant volume bomb 11 is reduced by exhausting air to gradually reach the required low pressure level.

[0023] Oil-gas separation: Since a certain amount of fuel gas is generated during the atomization process, a fuel separator 42 is connected to the outlet of the vacuum machine 41 to separate the oil-gas mixture in the constant volume bomb 11 to prevent the fuel gas from flowing back and affecting the experimental data.

[0024] Pressure control: The pressure sensor in the constant volume bomb 11 monitors the air pressure in the constant volume bomb 11 in real time to ensure that the pressure is maintained within the set range, simulating low pressure conditions.

[0025] The atomizing assembly 1 is provided with a constant volume bomb 11, a nozzle 12 is provided at the top of the constant volume bomb 11, and a cyclone 13 is provided above the nozzle 12; it also includes a compressor 14 directly connected to the constant volume bomb 11 to provide high-pressure gas to rotate through the cyclone 13 and optimize the atomization effect of the nozzle 12.

[0026] In order to optimize the atomization effect of the cyclone 13, the system design is controlled and adjusted through the following aspects: High-pressure gas drives the cyclone 13: The upper end of the cyclone 13 is connected to the compressor 14, and the high-pressure gas generated by the compressor 14 enters the cyclone 13 through a pipeline, causing the cyclone 13 to rotate at a high speed. By adjusting the air pressure and flow rate of the compressor 14, the speed of the cyclone 13 can be controlled, affecting the flow state of the fuel in the constant volume bomb 11, and further affecting the atomization effect.

[0027] Design of nozzle 12: The high-speed rotating airflow through the swirler 13 makes the fuel coming out of the nozzle 12 fully atomized under the action of centrifugal force. The structural design of the nozzle 12 is crucial to the atomization effect of the fuel. By adjusting the diameter, shape and injection angle of the nozzle 12, the cone angle and particle size distribution of the fuel atomization can be optimized.

[0028] Cyclone stability: In order to ensure the stability of the cyclone 13 under high-pressure airflow, the experimental system is designed with a support and shock-absorbing device to prevent vibration or deviation at high speeds and ensure the consistency of the atomization effect.

[0029] Experimental data collection and analysis: The industrial camera 53 in front of the constant volume bomb 11 is used to shoot the atomization process and record the atomization cone angle of the nozzle 12. Laser particle size analyzers are installed on the left and right sides of the constant volume bomb 11 to measure the SMD of the sprayed particles, and the data is analyzed by post-processing software to determine the particle size distribution and spray effect of the swirl atomization.

[0030] How it works (1) Fuel filling: Add alternative fuel into the fuel tank 21 and start the high-pressure fuel pump 23.

[0031] (2) System startup: Turn on the high-pressure oil pump 23, compressor 14 and cyclone 13. The fuel enters the nozzle 12 through the oil filter 24 and the air valve 25. The high-pressure gas rotates at high speed through the cyclone 13. The air interacts with the fuel at the nozzle 12 to achieve efficient atomization.

[0032] (3) Low temperature and low pressure environment setting: The expander 31 and the refrigerator 32 cool down, and the vacuum machine 41 evacuates air to ensure that the constant volume bomb 11 reaches low temperature and low pressure conditions.

[0033] (4) Cyclone atomization: The atomization process of nozzle 12 is measured by a laser particle size analyzer, and the industrial camera 53 captures the atomization cone angle.

[0034] (5) Data processing: The experimental data is collected and analyzed by computer to obtain the atomized particle size distribution and atomization characteristics of the fuel.

[0035] (6) End of the experiment: shut down the system and record the experimental data.

[0036] Therefore, the present invention adopts the above-mentioned atomization device to replace the aviation fuel atomization characteristics test device under low temperature and low pressure environment. The high-pressure airflow rotates at high speed through the cyclone to achieve efficient atomization of the nozzle; at the same time, a constant volume bomb with low temperature and low pressure conditions is created through a multi-stage refrigeration and exhaust device to simulate the actual working conditions and obtain atomization characteristics data.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A test device for the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, characterized in that: It comprises an atomizing assembly, on which a constant volume bomb is arranged, a nozzle is arranged at the top of the constant volume bomb, and a cyclone is also arranged above the nozzle; The fuel supply system is located at one end of the atomizing assembly and is used to provide aviation fuel; The temperature control component and the pressure control component are both connected to the atomization component; The atomization characteristic detection components are located on both sides of the atomization component.

2. According to claim 1, a test device for the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, characterized in that: The atomization characteristic detection component is provided with a receiver and a transmitter, which are located on both sides of the constant volume bomb. The atomization characteristic detection component is also provided with an industrial camera, which is located beside the constant volume bomb and is used to shoot the atomization cone angle.

3. The atomization device according to claim 1 is a test device for the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, characterized in that: The oil supply system is provided with an oil tank, and an overflow valve, a high-pressure oil pump, an oil filter and an air valve are sequentially arranged between the oil tank and the constant volume bomb, and they are connected by pipelines.

4. The atomization device according to claim 1 is a test device for the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, characterized in that: The temperature control component is provided with an expander, a refrigerator and a heat exchanger.

5. The atomization device according to claim 1, wherein the atomization device can be used to test the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, characterized in that: The pressure control component is provided with a vacuum machine and a fuel separator connected with a constant volume bomb.

6. The atomization device according to claim 1, wherein the atomization device can be used to test the atomization characteristics of alternative aviation fuels under low temperature and low pressure environment, characterized in that: It also includes a compressor that is directly connected to a constant volume bomb to provide high-pressure gas, which rotates after passing through a cyclone to promote fuel atomization.

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