Atomization characteristic testing device for aviation fuel at low temperature

Abstract

The invention provides a device for testing atomization characteristics of aviation fuel at low temperature. The device comprises an oil tank, the oil tank is arranged in a low-temperature environment, a buffer tank is arranged on one side of the oil tank, a nozzle is arranged on the buffer tank, a circumferential distributor is arranged below the nozzle, and a high-speed camera is arranged on the outer side of the circumferential distributor; and high-pressure nitrogen is arranged on the other side of the oil tank. The device for testing the atomization characteristic of the aviation fuel at the low temperature is a tool for accurately simulating an actual flight environment under a low-temperature condition, so that the atomization characteristic of the aviation fuel is better evaluated and improved, and the combustion efficiency, the thrust output and the flight performance of an engine are improved.

Description

Technical Field

[0001] The invention relates to the field of aerospace engineering, and in particular to a device for testing the atomization characteristics of aviation fuel at low temperatures. Background Art

[0002] With the rapid development of the global aviation industry, the demand for efficient, environmentally friendly aviation fuels that can adapt to extreme environmental conditions is becoming increasingly urgent. The atomization performance of traditional aviation fuels in low-temperature environments is limited, which not only affects the starting performance of the engine, but may also pose a threat to flight safety. The quality and uniformity of fuel atomization will affect combustion efficiency, thrust output and other aspects of performance. Therefore, the development and testing of new alternative fuels that can maintain good atomization characteristics at low temperatures has become a hot topic in current research. The test device and system introduced in the present invention are carefully designed to meet this demand, aiming to provide researchers with a comprehensive and reliable test platform. Summary of the invention

[0003] The purpose of the present invention is to provide a device for testing the atomization characteristics of aviation fuel at low temperatures, a tool that accurately simulates the actual flight environment under low temperature conditions, so as to better evaluate and improve the atomization characteristics of aviation fuel, thereby improving engine combustion efficiency, thrust output and flight performance.

[0004] To achieve the above object, the present invention provides a device for testing the atomization characteristics of aviation fuel at low temperature, comprising a fuel tank, the fuel tank being placed in a low temperature environment, a buffer box being arranged on one side of the fuel tank, a nozzle being arranged on the buffer box, a circumferential distributor being arranged below the nozzle, and a high-speed camera being arranged on the outer side of the circumferential distributor; High-pressure nitrogen is arranged on the other side of the oil tank.

[0005] Preferably, the low temperature environment can adopt cooling measures such as industrial refrigerators and freezers.

[0006] Preferably, a pressure gauge, a flow meter, a thermometer and a one-way solenoid valve are sequentially arranged between the oil tank and the buffer tank.

[0007] Preferably, a collecting box is provided below the circumferential distributor, the high-speed camera is located outside the collecting box, and the collecting box is made of transparent material.

[0008] Preferably, an overflow valve is provided between the collecting box and the oil tank.

[0009] Preferably, a first fixing plate is provided on the buffer box, a second fixing plate is provided below the first fixing plate and connected to the centrifugal nozzle, and the second fixing plate is an L-shaped plate.

[0010] Therefore, the present invention adopts the above-mentioned low-temperature atomization characteristic test device of aviation fuel, which is a tool that accurately simulates the actual flight environment under low-temperature conditions, so as to better evaluate and improve the atomization characteristics of aviation fuel, thereby improving engine combustion efficiency, thrust output and flight performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a schematic diagram of a device for testing the atomization characteristics of aviation fuel at low temperature according to the present invention.

[0012] Reference numerals 1. Oil tank; 2. Industrial refrigerator; 3. Buffer tank; 4. Nozzle; 5. Circumferential distributor; 6. High-speed camera; 7. High-pressure nitrogen; 8. Collection box; 9. Pressure gauge; 10. Flow meter; 11. Thermometer; 12. One-way solenoid valve; 13. Overflow valve; 14. First fixed plate; 15. First fixed plate. 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 A device for testing the atomization characteristics of aviation fuel at low temperatures includes a fuel tank 1, which is placed in a low-temperature environment. The low-temperature environment can be cooled by an industrial refrigerator 2 or a refrigerator. The cooling measure in this embodiment is to use an industrial refrigerator 2 for cooling to ensure that the inside of the fuel tank 1 can be stably maintained under a preset low-temperature environment. The industrial refrigerator 2 uses a high-efficiency refrigeration compressor, which can achieve a temperature drop from -20°C to -40°C in just 17 minutes under no-load conditions.

[0016] At the same time, in order to achieve high-efficiency cooling of the industrial refrigerator 2, the upper and lower sides of the industrial refrigerator 2 are opened φThe 18mm threaded hole can be conveniently connected to the high-pressure nitrogen 7 at the upper end, and the thermometer 11, pressure gauge 9, and flow meter 10 at the lower end. At the same time, the openings on both sides of the industrial refrigerator 2 are blocked with insulation cotton, which has almost no effect on the refrigeration effect in the industrial refrigerator 2. The fuel tank 1 is made of high-strength, corrosion-resistant stainless steel and is equipped with an insulation layer to reduce the interference of external temperature and ensure the accuracy of the test results. The fuel tank 1 is loaded with the alternative aviation fuel to be tested and is also equipped with a high-precision thermocouple for measuring temperature. The output signal is a PT100 signal. The temperature of the alternative aviation fuel is displayed on the intelligent temperature control meter display. It is connected to the thermometer 11, pressure gauge 9, and flow meter 10 through a specially designed pipeline to achieve the flow control and transportation of the fuel in the fuel tank 1. This design and configuration is intended to provide a reliable platform for testing fuel atomization characteristics in a low-temperature environment for laboratory or industrial applications to promote the research and improvement of aviation fuel technology.

[0017] A thermometer 11, a pressure gauge 9, a flow meter 10 and a one-way solenoid valve 12 are arranged in sequence between the oil tank 1 and the buffer tank 3.

[0018] The manual control valve can provide instant switch control for testing alternative aviation fuel, which is convenient for experimental operation; the flow meter 10 is used to accurately measure the flow of alternative aviation fuel to ensure the accuracy of experimental data; the thermometer 11 and the pressure gauge 9 are responsible for real-time monitoring of the temperature and pressure state of the fuel and providing necessary experimental parameter information. The thermometer 11 is a high-precision thermocouple with an output model of PT100. The temperature of the alternative aviation fuel at the nozzle is displayed through the intelligent temperature control meter display, making the experiment more accurate. The pressure gauge 9 uses a pressure gauge with low temperature resistance, corrosion resistance, and rust resistance, and the range is selected to be 1.6MPa, making the experiment more accurate; the function of the one-way solenoid valve 12 is to accurately control the atomization timing of the fuel and reduce the pipeline pressure to reduce the adverse effects on the atomization effect. These key components ensure that the experimental system can efficiently and accurately simulate the atomization characteristics of sustainable aviation fuel in a low temperature environment.

[0019] A buffer box 3 is provided on one side of the oil tank 1, a nozzle 4 is provided on the buffer box 3, a circumferential distributor 5 is provided below the nozzle 4, and a high-speed camera 6 is provided on the outer side of the circumferential distributor 5; A collecting box 8 is provided below the circumferential distributor 5 , and a high-speed camera 6 is located outside the collecting box 8 . The collecting box 8 is made of transparent material, so that the high-speed camera 6 can capture the atomization cone angle.

[0020] The buffer box 3 is provided with a first fixing plate 14, and a second fixing plate 15 is provided below the first fixing plate 14 and connected to the centrifugal nozzle 4. The second fixing plate 15 is an L-shaped plate. The first fixing plate 14 and the second fixing plate 15 form a stainless steel atomization frame. Nozzle 4 is mounted on the atomization rack and receives sustainable aviation fuel from the flow thermometer 11, pressure gauge 9, and flowmeter 10 through a 6mm copper tube. The design of the atomization rack takes into account the stable injection and effective collection of the fluid, and sufficient collection space is reserved inside to collect the sprayed atomized particles for subsequent analysis and detection. Nozzle 4 is the key actuator of the atomization test. It is mounted on the atomization rack and connected to the thermometer 11, pressure gauge 9, and flowmeter 10 through a 6mm copper tube to receive sustainable aviation fuel. Nozzle 4 adopts a special design, and the injection aperture is precisely controlled to ensure the uniformity and stability of fuel injection. The position of nozzle 4 is the core component to achieve test flexibility and accuracy. A drive structure (integrated with precision motion control motors and sensors, the specific structure is not drawn) is set on the atomization test device, which can realize the precise movement of the nozzle in the three directions of X, Y, and Z on the atomization rack, as well as the rotation control in the axial direction. Through the preset control program, the tester can flexibly adjust the angle of the nozzle, simulate the atomization state of the nozzle 4 under different working conditions, and comprehensively evaluate the atomization performance of the nozzle 4 at different angles to ensure the accuracy and comprehensiveness of the test results. The circumferential distributor 5 is installed at the bottom of the atomization frame. Its function is to evenly distribute the atomized particles to avoid the accumulation of particles in local areas and affect the test results.

[0021] The data acquisition and analysis unit is an indispensable part of modern atomization technology research, and undertakes important experimental measurement and data processing functions. In this unit, the main equipment includes industrial cameras, circumferential distributors, and a variety of high-performance data analysis software. The combination of these devices and software can achieve a comprehensive and accurate analysis of atomization characteristics, providing a scientific basis for optimizing atomization performance.

[0022] At the same time, a high-speed camera 6 is set in front of the nozzle 4 to record the process of spray formation and its characteristics. Through high-resolution shooting, the high-speed camera 6 can obtain clear images of the atomization cone angle. The researchers used image processing technology to analyze these images to calculate the size of the spray cone angle. The cone angle is an important parameter to characterize the spray morphology, which is directly related to the distribution uniformity and atomization efficiency of the spray. Through precise cone angle measurement, the researchers can evaluate the spray performance of the nozzle 4 and optimize the design.

[0023] Commercial data analysis software plays an important role in further processing and analyzing the data acquired by high-speed cameras 6. These software have powerful data processing and visualization functions, which can transform complex data into intuitive charts and graphs, making it easier for researchers to identify patterns and trends in the data.

[0024] An overflow valve 13 is provided between the collecting box 8 and the oil tank 1, and the oil collected in the collecting box 8 flows through the overflow valve 13 and is recovered into the oil tank for recycling.

[0025] Therefore, the present invention adopts the above-mentioned aviation fuel atomization characteristics testing device at low temperature, which is a tool that accurately simulates the actual flight environment under low temperature conditions, so as to better evaluate and improve the atomization characteristics of aviation fuel, thereby improving engine combustion efficiency, thrust output and flight performance.

[0026] 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 device for testing the atomization characteristics of aviation fuel at low temperatures, characterized in that: It comprises an oil tank, the oil tank is placed in a low temperature environment, a buffer box is arranged on one side of the oil tank, a nozzle is arranged on the buffer box, a circumferential distributor is arranged below the nozzle, and a high-speed camera is arranged on the outer side of the circumferential distributor; High-pressure nitrogen is arranged on the other side of the oil tank.

2. The device for testing the atomization characteristics of aviation fuel at low temperature according to claim 1, characterized in that: The low temperature environment can be cooled by industrial refrigerators and freezers.

3. The device for testing the atomization characteristics of aviation fuel at low temperature according to claim 1, characterized in that: A pressure gauge, a flow meter, a thermometer and a one-way solenoid valve are arranged in sequence between the oil tank and the buffer tank.

4. The device for testing the atomization characteristics of aviation fuel at low temperature according to claim 1, characterized in that: A collecting box is arranged below the circumferential distributor, the high-speed camera is located outside the collecting box, and the collecting box is made of transparent material.

5. The device for testing the atomization characteristics of aviation fuel at low temperature according to claim 4, characterized in that: An overflow valve is arranged between the collecting box and the oil tank.

6. The device for testing the atomization characteristics of aviation fuel at low temperature according to claim 1, characterized in that: The buffer box is provided with a first fixing plate, a second fixing plate is provided below the first fixing plate and connected with the centrifugal nozzle, and the second fixing plate is an L-shaped plate.

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