Experimental system for researching plasma ice prevention and removal

Abstract

The utility model discloses an experimental system for researching plasma ice prevention and removal, which comprises a plasma exciter, a refrigeration platform, a micropipettor, a high-speed camera, a thermal infrared imager and a plasma excitation power supply, the plasma exciter is mounted on the top surface of the refrigeration platform, and the refrigeration platform is used for providing a low-temperature environment for the plasma exciter. The plasma exciter is electrically connected with the excitation power supply, the micropipettor is aligned with the plasma exciter and used for dripping liquid drops on the surface of the plasma exciter, and the high-speed camera is aligned with the plasma exciter and used for observing the freezing process of the liquid drops. And the thermal infrared imager is aligned with the plasma exciter and is used for observing the temperature indexing change and the ice shape change on the surface of the plasma exciter. The system integrates a plurality of components to form a complete plasma anti-icing and deicing experiment platform, so that the whole process research from liquid drop icing to plasma deicing is realized, and the experiment comprehensiveness and efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the field of physical experiment research, and in particular relates to a plasma anti-icing experimental system. Background Art

[0002] With the development and utilization of polar routes and polar resources, the icing problem of polar scientific research, navigation ships, marine engineering equipment and various equipment has become a hot topic of research. The impact of icing on ships is comprehensive, including personnel safety, equipment operation and driving stability. For example, icing on superstructures will reduce structural stability, change structural stress, and reduce structural reliability. In addition, icing will also affect aircraft such as drones and carrier-based aircraft. In high-latitude areas, when there are strong winds and low air temperatures, the flight safety of aircraft will be affected by icing on the aircraft. Ice on the wings of aircraft will affect the aerodynamic shape, causing the aircraft's lift and rudder effect to decrease sharply, resulting in the aircraft losing control and crashing; and the icing of aircraft instruments and sensors will affect the pilot's accurate judgment of the flight status, resulting in serious safety accidents. Therefore, long-term and stable anti-icing technology is crucial to promoting the development of key technologies for my country's polar equipment.

[0003] Traditional anti-icing technologies mainly include coating materials, gas-heat anti-icing, and electric-heat anti-icing. However, the temperature difference caused by seasonal changes in the polar regions leads to cyclic changes in thermal stress of coating materials and substrates. A series of polar factors such as seawater corrosion, marine atmospheric corrosion, wear corrosion, and hydrogen embrittlement can cause the coating materials to be damaged and fail. Strong radiation environments can easily reduce the toughness and ductility of materials, causing brittle cracks and accelerated aging; the impact and friction between the hull and ice and floating ice can destroy the coating structure, thereby losing its protective function. Gas-heat anti-icing requires air to be drawn from the engine, which will reduce the engine's air intake, thereby affecting engine performance and reducing combat capabilities. In addition, complex pipeline equipment also brings many inconveniences to aircraft maintenance. Since electric-heat anti-icing technology needs to transfer heat through the skin, the heat transfer efficiency is relatively low, and it has high requirements for the performance of the skin. Obviously, mainstream anti-icing methods have their own problems, and new and efficient anti-icing technologies need to be studied and explored urgently.

[0004] With the development of integrated power systems for ships and the complete elimination of engine bleed systems in pure electric aircraft, anti-icing systems based on electric drive are bound to represent the development direction of future anti-icing technology. Since the air and insulating medium around the actuator electrode can be quickly heated during plasma discharge, it is expected to become a new type of electric-driven and efficient anti-icing technology. Among them, the surface dielectric barrier discharge (SDBD) can stably generate plasma, has the advantages of fast response speed, simple structure, and wide bandwidth, and has aroused great research interest in the scientific community in recent years. At present, although researchers have conducted a lot of research on anti-icing on plasma excitation, more work is focused on the thermal effect and flow control of plasma, and whether it is useful for anti-icing. This application establishes a basic physical model and experimentally explores the interaction between water droplets and plasma. It is hoped that the law can be explored from the perspective of basic research, and a reference can be provided for explaining plasma anti-icing from a physical mechanism. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model innovatively proposes a plasma anti-icing experimental system. The system integrates multiple components such as a plasma actuator, a refrigeration platform, a micropipette, a high-speed camera, an infrared thermal imager, and a special plasma excitation power supply to form a complete plasma anti-icing experimental platform, realizing the study of the entire process from droplet freezing to plasma deicing, and improving the comprehensiveness and efficiency of the experiment.

[0006] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0007] A plasma anti-icing experimental system is provided, comprising a plasma actuator, a refrigeration platform, a micropipette, a high-speed camera, an infrared thermal imager and a plasma excitation power supply, wherein the plasma actuator is installed on the top surface of the refrigeration platform, the refrigeration platform is used to provide a low-temperature environment for the plasma actuator, the plasma actuator is electrically connected to the excitation power supply, the micropipette is aimed at the plasma actuator and is used to drop liquid droplets on the surface of the plasma actuator, the high-speed camera is aimed at the plasma actuator and is used to observe the freezing process of the liquid droplets, and the infrared thermal imager is aimed at the plasma actuator and is used to observe the temperature gradient change and the shape change of ice on the surface of the plasma actuator.

[0008] Preferably, the plasma actuator is an asymmetric structure, which includes a high-voltage electrode, a low-voltage electrode and a dielectric layer, and the high-voltage electrode and the low-voltage electrode are respectively located on the upper and lower surfaces of the dielectric layer.

[0009] Preferably, the high voltage electrode and the low voltage electrode have the same thickness, the width of the high voltage electrode is smaller than the width of the low voltage electrode, and the widths of the high voltage electrode and the low voltage electrode are both smaller than the width of the dielectric layer.

[0010] Preferably, the dielectric layer is made of polyimide material.

[0011] Preferably, an acrylic plate is installed between the plasma actuator and the refrigeration platform, and the plasma actuator is installed at the center of the top surface of the acrylic plate.

[0012] Preferably, the refrigeration platform is a semiconductor refrigeration platform, which includes a semiconductor thermoelectric module, a heat sink, a DC power supply, a control circuit, a cold end and a hot end, the cold end is in contact with the aluminum plate, and the plasma actuator is installed on the top surface of the aluminum plate through an acrylic plate.

[0013] Preferably, the temperature of the aluminum plate is controlled between -35°C and 20°C.

[0014] Preferably, the micropipette, high-speed camera and infrared thermal imager can all be aligned with the plasma actuator via an adjustable lifting platform.

[0015] Compared with the prior art, the utility model has the following significant advantages:

[0016] (1) The experimental device is flexible to use. Each module can be disassembled and assembled. An infrared thermal imager, micropipette or high-speed camera can be installed on the lifting platform according to different experimental projects.

[0017] (2) The plasma generated by the plasma actuator configuration used in the experimental device is relatively stable, which is convenient for observing and studying the interaction between plasma and water droplets, and can also observe the dynamic changes of ice shape and surface temperature during the plasma deicing process.

[0018] (3) The experimental system can not only carry out plasma anti-icing experiments, but also observe the interaction between plasma and droplets with the help of high-speed cameras, which is convenient for studying the microscopic process of plasma anti-icing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the anti-icing experimental platform of the utility model.

[0020] Figure 2 It is a schematic diagram of the deicing experimental platform of the utility model.

[0021] Figure numerals: 1. plasma actuator; 11. high voltage electrode; 12. low voltage electrode; 13. dielectric layer; 2. cooling platform; 21. aluminum plate; 3. micropipette; 4. high-speed camera; 5. infrared thermal imager; 6. plasma excitation power supply; 7. acrylic plate. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, the omission of some well-known structures and their descriptions in the drawings is understandable. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0023] like Figure 1-2 As shown, the utility model provides a plasma anti-icing experimental system, comprising a plasma actuator 1, a refrigeration platform 2, a micropipette 3, a high-speed camera 4, an infrared thermal imager 5 and a plasma excitation power supply 6. The plasma actuator 1 is installed on the top surface of the refrigeration platform 2, the refrigeration platform 2 is used to provide a low-temperature environment for the plasma actuator 1, the plasma actuator 1 is electrically connected to the excitation power supply, the micropipette 3 is aimed at the plasma actuator 1 and is used to drop a droplet on the surface of the plasma actuator 1, the high-speed camera 4 is aimed at the plasma actuator 1 and is used to observe the freezing process of the droplet, and the infrared thermal imager 5 is aimed at the plasma actuator 1 and is used to observe the temperature gradient change and the shape change of ice on the surface of the plasma actuator 1.

[0024] The plasma actuator 1 is of an asymmetric configuration, and is composed of a high-voltage electrode 11, a low-voltage electrode 12 and a dielectric layer 13, wherein the high-voltage electrode 11 and the low-voltage electrode 12 are respectively located on the upper and lower surfaces of the dielectric layer 13. The high-voltage electrode 11 and the low-voltage electrode 12 are copper foils with a width of 3 mm and 5 mm, respectively, and a thickness of 0.027 mm; a polyimide material with a relative dielectric constant of 3.4 is used as the dielectric layer 13, and the thickness is 0.18 mm. The length of the discharge region of the plasma actuator 1 is fixed at 100 mm. An acrylic plate 7 with a length of 200 mm and a width of 100 mm is used as the bottom plate, and the plasma actuator 1 is arranged in the center of the acrylic plate 7. This design may help optimize the generation and distribution of plasma, improve the interaction efficiency between plasma and ice layer, and thus achieve better performance in the deicing process.

[0025] The refrigeration platform 2 is a semiconductor refrigeration platform, which includes a semiconductor thermoelectric module, a radiator, a DC power supply, a control circuit, a cold end and a hot end. It uses the semiconductor Peltier effect and is driven by a DC regulated power supply. Its cold end is in contact with an aluminum plate 21 with a size of 200mm×100mm×5mm, and its hot end is connected to a water-cooled radiator. By adjusting the input voltage and current, the temperature of the aluminum plate 21 can be changed between -35℃ and 20℃. By using a semiconductor refrigeration platform, by adjusting the input voltage and current of the DC power supply, the temperature of the aluminum plate 21 can be accurately controlled within a wide temperature range (-35℃ to 20℃), providing a stable low-temperature environment for the experiment, which is conducive to more accurately simulating actual anti-icing conditions.

[0026] The effective adjustable height of the adjustable lifting platform is 200 mm. The micropipette 3 is installed on the working surface of the lifting platform to control the drop height. The adjustable lifting platform can accurately control the drop height of the drop, which not only increases the repeatability of the experiment, but also makes the experimental conditions more controllable, which is conducive to in-depth exploration of the influence of different parameters on icing and deicing effects.

[0027] The infrared thermal imager 5, model testo 871, can take infrared thermal images and photos at the same time, and can observe the temperature changes and ice shape changes on the surface of the plasma actuator 1. The infrared thermal imager 5 can not only monitor the temperature distribution and ice shape changes on the surface of the plasma actuator 1 in real time, but also has the ability to take infrared thermal images and photos at the same time, which greatly enhances the ability to obtain and analyze experimental data.

[0028] The high-speed camera 4, in combination with a macro lens, can capture the dynamic process of tiny droplet freezing and plasma deicing, providing technical support for the study of plasma anti-icing process. The combination of the high-speed camera 4 and the macro lens can capture the dynamic details of tiny droplet freezing and deicing.

[0029] The infrared thermal imager 5 and high-speed camera 4 used in the experimental system have corresponding supporting software. Combining experimental observation with the supporting software of the infrared thermal imager 5, the temperature change and deicing efficiency under the action of plasma can be recorded and analyzed in detail, providing a scientific basis for theoretical research and practical application, and accelerating the research and development process of plasma anti-icing technology.

[0030] Plasma excitation power supply 6, the model of the excitation power supply is CS2671AX withstand voltage tester, and the specific parameters are: the input voltage is 220V, the frequency is 4763Hz AC; the output waveform is a sine wave, and the output voltage is a continuously adjustable value: 0.0010.00kV. The withstand voltage tester used as an excitation power supply has the ability to continuously adjust the voltage output, and can conduct experiments within a wide range of excitation parameters, providing hardware support for exploring the optimal plasma excitation conditions.

[0031] Here’s how to use it:

[0032] 1. Plasma anti-icing experiment

[0033] Turn on the power of the refrigeration device, lower the surface temperature of the plasma actuator 1 to below -20°C, use the micropipette 3 to generate tiny droplets, drop them on the surface of the plasma actuator 1, and use a high-speed camera to observe the freezing process of the droplets. Then turn on the power of the plasma actuator 1, wait for the surface temperature of the plasma actuator 1 to stabilize, drop the droplets on the actuator surface again, and use a high-speed camera to observe the freezing process of the droplets. By comparing the freezing time of the droplets in the two freezing processes, the feasibility of plasma anti-icing can be proved.

[0034] 2. Plasma deicing experiment

[0035] Turn on the power of the refrigeration device, wait for frost to appear on the surface of the plasma actuator 1 and stabilize, then turn on the power of the plasma actuator 1, and use the infrared thermal imager 5 to observe the temperature gradient change of the plasma surface and the shape change of the ice (the infrared thermal imager 5 has the function of taking infrared pictures and taking pictures at the same time). Then, with the help of the supporting software of the infrared thermal imager 5, the temperature change of the plasma generation area at different times and the temperature change curve of any point on the plasma actuator 1 over time can be plotted. By analyzing the data obtained from the experiment, the efficiency of plasma deicing under different excitation parameters can be compared, providing a reliable and ideal experimental basis for the practical application of plasma deicing.

[0036] In summary, this technical solution has significantly improved the efficiency and accuracy of plasma anti-icing experiments through highly integrated design, precise temperature control, advanced observation methods and flexible experimental settings, laying a solid foundation for research and application development in related fields.

[0037] According to the description and drawings of the utility model, those skilled in the art can easily manufacture or use the utility model for studying a plasma anti-icing experimental system, and can produce the positive effects recorded in the utility model.

[0038] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0039] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A plasma anti-icing experimental system, characterized in that: The invention comprises a plasma actuator (1), a refrigeration platform (2), a micropipette (3), a high-speed camera (4), an infrared thermal imager (5) and a plasma excitation power supply (6), wherein the plasma actuator (1) is mounted on the top surface of the refrigeration platform (2), the refrigeration platform (2) is used to provide a low-temperature environment for the plasma actuator (1), the plasma actuator (1) is electrically connected to the excitation power supply, the micropipette (3) is aimed at the plasma actuator (1) and is used to drop liquid droplets on the surface of the plasma actuator (1), the high-speed camera (4) is aimed at the plasma actuator (1) and is used to observe the freezing process of the liquid droplets, and the infrared thermal imager (5) is aimed at the plasma actuator (1) and is used to observe the temperature gradient change and the shape change of ice on the surface of the plasma actuator (1).

2. The plasma anti-icing experimental system according to claim 1, characterized in that: The plasma actuator (1) is an asymmetric structure, comprising a high-voltage electrode (11), a low-voltage electrode (12) and a dielectric layer (13), wherein the high-voltage electrode (11) and the low-voltage electrode (12) are respectively located on the upper and lower surfaces of the dielectric layer (13).

3. The plasma anti-icing experimental system according to claim 2 is characterized in that: The high-voltage electrode (11) and the low-voltage electrode (12) have the same thickness, the width of the high-voltage electrode (11) is smaller than the width of the low-voltage electrode (12), and the widths of the high-voltage electrode (11) and the low-voltage electrode (12) are both smaller than the width of the dielectric layer (13).

4. The plasma anti-icing experimental system according to claim 2 is characterized in that: The material of the dielectric layer (13) is polyimide material.

5. The plasma anti-icing experimental system according to claim 1 is characterized in that: An acrylic plate (7) is installed between the plasma actuator (1) and the refrigeration platform (2), and the plasma actuator (1) is installed at the center of the top surface of the acrylic plate (7).

6. The plasma anti-icing experimental system according to claim 1, characterized in that: The refrigeration platform (2) is a semiconductor refrigeration platform (2), comprising a semiconductor thermoelectric module, a heat sink, a DC power supply, a control circuit, a cold end and a hot end, the cold end is in contact with an aluminum plate (21), and the plasma actuator (1) is mounted on the top surface of the aluminum plate (21) via an acrylic plate (7).

7. The plasma anti-icing experimental system according to claim 6 is characterized in that: The temperature of the aluminum plate (21) is controlled between -35°C and 20°C.

8. The plasma anti-icing experimental system according to claim 1 is characterized in that: The micropipette (3), high-speed camera (4) and infrared thermal imager (5) can all be aligned with the plasma actuator (1) via an adjustable lifting platform.

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