An aero-engine icing simulation test device

Abstract

This invention provides an aircraft engine icing simulation test apparatus, comprising: a climate environment chamber for mounting the engine, the climate environment chamber being equipped with a spray device that is positioned to correspond to the engine along the direction of gravity; a spray equipment room connecting the spray device; and a refrigeration device for supplying cold air to the climate environment chamber. It can be seen that, compared with horizontal icing test apparatuses in related technologies, the test apparatus of this application has the following advantages: First, its vertical structure can fully utilize vertical space and save floor space, thereby reducing construction costs; second, the vertical structure can utilize gravity, facilitating the intake of atomized droplets into the engine to complete the icing test; and third, the annular uniform distribution of nozzles on the spray device facilitates the uniform distribution of atomized droplets, thereby improving the uniformity of the distribution of atomized droplets ingested into the engine.

Description

Technical Field

[0001] This invention relates to the field of engine testing equipment, and more specifically to an aircraft engine icing simulation test device. Background Technology

[0002] Under icing weather conditions, icing in aero-engines poses a significant threat to their safe operation: engine icing can lead to reduced engine thrust, increased intake distortion, and mechanical damage caused by ice detachment impacting engine blades. Accident investigations have revealed various forms of aero-engine icing, including icing of intake components caused by supercooled water or large supercooled water droplets, as well as icing inside the engine caused by ice crystals. Therefore, domestic and international airworthiness regulations specify requirements for engine operation under these icing weather conditions, requiring that during the engine development and certification phase, the overall airworthiness compliance of the engine be verified through a combination of computational analysis and experimental verification.

[0003] In related technologies, horizontal icing simulation devices such as open-air platforms and high-altitude platforms are commonly used to conduct engine icing tests to complete relevant verifications. However, horizontal icing simulation devices occupy a large area, and since the engine's intake direction is horizontal, the weight of the atomized droplets will affect their uniformity of distribution at the engine intake. In particular, the gravitational settling effect of supercooled large water droplets makes it even less likely to achieve uniformity at the engine intake. In addition, the aforementioned engine icing platforms do not yet have the ability to simulate ice crystals. Summary of the Invention

[0004] This invention is made to solve the above-mentioned technical problems. Its purpose is to provide an aircraft engine icing simulation test device, which can solve the problems in related technologies such as the large footprint caused by the horizontal setting of the test device, the uneven distribution of supercooled water droplets at the engine inlet, and the lack of ice crystal simulation capabilities.

[0005] This application discloses an aircraft engine icing simulation test apparatus, comprising: a climate environment chamber, a spray equipment room, a refrigeration equipment room, and a fuel room. The climate environment chamber is used to install the engine and is equipped with a spray device. The spray device sprays water directly downwards onto the engine along the direction of gravity. The spray device has multiple nozzles evenly distributed in multiple rings from the inside out, thereby ensuring the uniform distribution of the sprayed atomized droplets within the climate environment chamber. The fuel room is used to supply fuel to the installed engine, ensuring its normal operation during engine testing.

[0006] The spray equipment room is connected to the spray devices, supplying water and air to them. This allows the nozzles on the spray devices to spray atomized droplets onto the engine. The water and air supply pressure in the spray equipment room is adjustable. By adjusting the pressure parameters, the spray devices can spray atomized droplets of different particle sizes, thus creating test scenarios with different particle size distributions in the climate environment chamber. Simultaneously, the spray equipment room is equipped with a liquid nitrogen device, connected to the liquid nitrogen pipeline within the spray devices, to inject nitrogen gas into the atomization core area of ​​the ice crystal nozzles, generating ice crystals.

[0007] The refrigeration equipment room is equipped with a refrigeration device. On the one hand, the refrigeration device is used to cool the air entering the air intake tower, reducing the impact of the outdoor atmosphere on the temperature of the climate environment chamber. On the other hand, it is used to provide cold air to the climate environment chamber to adjust the temperature in the climate environment chamber. In this way, under the refrigeration effect of the refrigeration device, the atomized droplets sprayed by the spray device will be fully subcooled, and under the action of gravity and the suction of the engine, they will be sucked into the engine to complete the icing test.

[0008] It can be seen that, compared with the horizontal icing test devices in related technologies, the test device of this application has the following advantages: First, the vertical structure of the test device can make full use of vertical space and save floor space, thereby reducing construction costs; second, the vertical structure can utilize gravity, which is beneficial for the atomized droplets, especially large water droplets, to be sucked into the engine to complete the icing test; third, the annular uniform distribution of nozzles on the spray device is beneficial for the uniform distribution of atomized droplets, thereby improving the uniformity of the distribution of atomized droplets sucked into the engine; fourth, by replacing some atomizing nozzles of the nozzle device with ice crystal nozzles, combined with a snowmaking machine, artificial simulation of ice crystal clouds can be achieved.

[0009] Optionally, the spray device can be movably mounted in a climate control chamber to adjust the distance between it and the engine, thereby regulating the supercooling of the atomized droplets. Taking large droplets as an example, large droplets require more thorough supercooling than other smaller atomized droplets. This necessitates a longer fall due to gravity. By raising the spray device with a rope, the distance between the spray device and the engine can be increased, ensuring that large droplets have sufficient fall distance to be adequately supercooled before being drawn into the engine.

[0010] Optionally, the climate environment chamber is connected to a refrigeration unit via an air inlet duct and an air outlet duct; the refrigeration unit can provide cold air to the climate environment chamber through the air outlet duct, and also refrigerate the air from the air inlet duct, forming a circulating refrigeration to reduce the temperature in the climate environment chamber.

[0011] Optionally, the heights of the outlet duct and the inlet duct decrease along the direction of gravity. Specifically, the outlet duct is positioned at the top of the climate chamber, close to the spray device, while the inlet duct is positioned on the side wall of the climate chamber, close to the engine. Thus, the outlet duct delivers airflow above the climate chamber, and the inlet duct absorbs airflow below, creating a downward airflow agitation effect within the climate chamber. Firstly, under the combined influence of gravity, airflow agitation, and engine operation, this facilitates the absorption of atomized droplets into the engine. Secondly, the airflow agitation effect promotes the uniform distribution of the atomized liquid within the climate chamber, thereby improving the uniformity of the atomized droplets absorbed into the engine.

[0012] Optionally, the air outlet duct is offset from the engine along the direction of gravity. For example, the air outlet duct is arranged around the top of the climate environment chamber and around the spray device, while the air inlet duct is arranged around the side wall of the climate environment chamber and around the engine. In this way, firstly, it can prevent foreign objects mixed in with the airflow entering the climate environment chamber with the air outlet duct from being sucked into the engine; secondly, it can improve the uniformity of airflow from the air outlet duct and the uniformity of airflow from the air inlet duct, resulting in a more even distribution of airflow agitation in the climate environment chamber.

[0013] Optionally, the central area of ​​the climate environment chamber is used for the layout of the spray device and the engine, while the outer area of ​​the climate environment chamber surrounding the central area is used for the even distribution of air supply ducts and air inlet ducts.

[0014] Optionally, the test apparatus also includes an air intake tower connected to the climate environment chamber. The air intake tower is located at the top of the climate environment chamber, and the air intake tower, spray device, and engine are arranged sequentially along the direction of gravity. Outside air enters the climate environment chamber from the bottom of the air intake tower. A heat exchanger and a first silencer are installed in the air intake tower. The first silencer and the heat exchanger are arranged sequentially along the airflow direction. The first silencer has a noise reduction function to reduce the noise generated during airflow. The heat exchanger can be a plate-fin heat exchanger, and the refrigerant inside the heat exchanger is connected to the refrigeration device through a piping system.

[0015] As can be seen in the first aspect, the refrigeration device, in conjunction with the heat exchanger, cools the air entering the intake tower, i.e., cools the air entering the climate environment chamber. Meanwhile, the refrigeration device, in conjunction with the inlet and outlet ducts, provides internal recirculation cooling for the air within the climate environment chamber. This two-stage cooling improves the temperature adjustment effect within the climate environment chamber, allowing the air to drop to -40°C, thus ensuring the smooth conduct of the icing test. In the second aspect, this device enables two levels of cooling. Specifically, if the engine's operating power is low, after the climate environment chamber reaches the required cooling temperature, the duct system can be shut off, thereby closing the internal recirculation cooling of the climate environment chamber from the refrigeration equipment, or the duct system opening can be reduced to decrease the degree of internal recirculation cooling. Simultaneously, the piping system remains open, relying on the heat exchanger to cool the external air entering the climate environment chamber, thus saving energy. Conversely, if the engine's operating power is high, the duct system and piping system remain open at all times to simultaneously cool the external air entering the climate environment chamber and provide internal recirculation cooling for the air within the climate environment chamber.

[0016] Optionally, the device also includes a cooling chamber. The test apparatus separates the climate environment chamber and the cooling chamber by a partition, and the partition has a passage for installing the engine. Air containing cloud droplets or ice crystals in the climate environment chamber is drawn into the engine intake system and finally discharged into the cooling chamber. During the test, the low-temperature cloud in the climate environment chamber is drawn into the intake manifold by the running engine, and then freezes on the engine intake components. The high-temperature combustion exhaust gas from the engine is discharged into the cooling chamber, where it is cooled by spraying water before being discharged. In this way, the partition isolates the engine inlet and outlet environments, preventing the high-temperature exhaust environment from interfering with the low-temperature intake environment.

[0017] Optionally, it also includes an exhaust tower connected to the cooling chamber. The exhaust gases from the engine will be discharged outwards sequentially through the cooling chamber and the exhaust tower.

[0018] Optionally, an exhaust window is provided on the side of the exhaust tower away from the intake tower, and the exhaust window exhausts air away from the intake tower. This can prevent the exhaust from the exhaust tower from interfering with the intake of the intake tower.

[0019] Optionally, it also includes a snowmaking machine located in the climate environment chamber and situated to the side of the engine. Thus, the device of this application simultaneously sprays atomized droplets and ice crystals through a combination of nozzles using a spraying device, and artificially creates snow in the environment chamber through the snowmaking machine, thereby possessing the ability to simulate ice crystals at multiple concentrations, thus diversifying the methods of ice crystal simulation. Specifically, the test scenarios of the test device of this application include the following:

[0020] The scenario of supercooled water droplets is as follows:

[0021] The particle size of supercooled water droplets is generally 15~50μm. By installing an internal mixing air atomizing nozzle on the spraying device and adjusting the water pressure and air pressure between the spraying devices, supercooled water droplets of the required size can be sprayed out.

[0022] The scenario of supercooled large water droplets is as follows:

[0023] By replacing some of the air atomizing nozzles on the spraying device with different models, or by replacing them with single-fluid nozzles, a combination of these two different nozzles can be used to achieve a bimodal distribution of supercooled large water droplet size. The supercooled large water droplet size varies, ranging from tens of micrometers to thousands of micrometers.

[0024] The ice crystal cloud scene is as follows:

[0025] The spray nozzles are flexibly replaceable. When using a combination of droplet nozzles and ice crystal nozzles, and in conjunction with a snowmaking machine to assist in artificial snowmaking, ice crystal cloud scenes with multiple concentrations can be achieved.

[0026] The beneficial effects of this invention are as follows:

[0027] This application discloses an aircraft engine icing simulation test device, comprising: a climate environment chamber for mounting the engine, the climate environment chamber being equipped with a spray device and a snowmaking machine, wherein the spray device is equipped with nozzles of different configurations to generate atomized droplets or ice crystal particles, which are drawn into the engine intake directly below along the direction of gravity; the snowmaking machine, when used for ice crystal cloud testing, sprays the atomized droplets into the low-temperature environment chamber, which are then rapidly frozen into ice crystal particles; a spray equipment room connecting the spray device; and a refrigeration device for providing cold air to the climate environment chamber. It can be seen that, compared with the horizontal icing test devices in related technologies, the test device of this application has two advantages: firstly, the vertical structure of the test device can fully utilize vertical space and save floor space, thereby reducing construction costs; secondly, in the prior art, the horizontal layout of the icing simulation device, because the engine intake direction is horizontal, means that the weight of the atomized droplets will affect their uniformity of distribution at the engine intake, with the weight of supercooled large droplets having a particularly significant impact. The icing simulation device of this application, being a vertical structure, avoids this problem. The intake direction of the prototype engine is vertical, consistent with the direction of gravity. The self-weight settling effect of the atomized droplets not only does not affect the uniformity of their distribution at the engine intake, but also facilitates the intake of atomized droplets into the engine to complete the icing test by utilizing gravity. Thirdly, the annular uniform distribution of nozzles on the spray device facilitates the uniform distribution of atomized droplets, thereby improving the uniformity of the distribution of atomized droplets in the engine. Fourthly, replacing some atomizing nozzles of the nozzle device with ice crystal nozzles, combined with a snowmaking machine, can achieve the artificial simulation of ice crystal clouds. Attached Figure Description

[0028] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related properties or features may have the same or similar reference numerals.

[0029] Figure 1 This is a top view of the experimental apparatus of the present invention;

[0030] Figure 2 This is an internal structural diagram of the experimental device of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10-Engine,

[0033] 100-Climate environment chamber, 110-Spraying device, 120-Hanging rope, 130-Blocking panel, 140-Snowmaking machine

[0034] 200-Spraying Equipment Room

[0035] 300 - Refrigeration equipment room; 310 - Refrigeration unit; 320 - Air inlet duct; 330 - Air outlet duct; 340 - Air duct system; 350 - Piping system.

[0036] 400 - Intake tower, 420 - First silencer, 410 - Heat exchanger

[0037] 500 - Cooling chamber, 510 - Nozzle

[0038] 600 - Exhaust tower, 610 - Ejector tube, 620 - Exhaust window, 630 - Second silencer, 640 - Deflector,

[0039] 700-Fuel Room. Detailed Implementation

[0040] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0041] It should be noted that these and other accompanying drawings are merely examples and are not drawn to scale, and should not be construed as limiting the scope of protection of the present invention.

[0042] The following is combined Figure 1 and Figure 2 This application is described.

[0043] This application discloses an icing simulation test device for an aircraft engine 10, comprising: a climate environment chamber 100, a spray equipment room 200, a refrigeration equipment room 300, and a fuel room 700. The climate environment chamber 100 is used to install the engine 10 and is equipped with a spray device 110. The spray device 110 is positioned to correspond to the engine 10 along the direction of gravity. The spray device 110 is equipped with multiple nozzles, which are evenly distributed in multiple rings from the inside out, thereby ensuring the uniform distribution of the sprayed atomized droplets in the climate environment chamber 100. The fuel room 700 is used to supply fuel to the installed engine 10, ensuring the normal operation of the engine 10 during the test.

[0044] The spray equipment room 200 is connected to the spray device 110 to supply water and air, thereby causing the nozzles on the spray device 110 to spray atomized droplets onto the engine 10. The water and air supply pressure of the spray equipment room 200 is adjustable. By adjusting the pressure parameters, the spray device 110 can spray atomized droplets of different particle sizes, thus creating a test scenario with different particle size distributions in the climate environment chamber 100. At the same time, the spray equipment room 200 is equipped with a liquid nitrogen device, which is connected to the liquid nitrogen pipeline inside the spray device 110 to spray nitrogen gas into the atomization core area of ​​the ice crystal nozzle of the spray device 110 to generate ice crystals.

[0045] The refrigeration equipment room 300 is equipped with a refrigeration device 310, which is used to provide cold air to the climate environment room 100 to adjust the temperature in the climate environment room 100. Under the refrigeration effect of the refrigeration device 310, the atomized droplets sprayed by the spray device 110 will condense into ice crystals, and under the action of gravity and the suction action of the engine 10, they will be sucked into the engine to complete the icing test.

[0046] It can be seen that, compared with the horizontal icing test devices in related technologies, the test device of this application has the following advantages: First, the vertical structure of the test device of this application can make full use of the height space and save the floor area, thereby reducing the construction cost; Second, in the existing horizontal layout icing simulation device, since the engine intake direction is horizontal, the weight of the atomized droplets will affect the uniformity of their distribution at the engine intake, especially the weight of supercooled large droplets. However, the icing simulation device of this application has a vertical structure, so the engine intake direction is vertical, consistent with the direction of gravity. The settling effect of the atomized droplets' weight will not only not affect their uniformity of distribution at the engine intake, but also the gravity will help the atomized droplets to be drawn into the engine to complete the icing test, especially for supercooled large droplets, which is more conducive to their uniform distribution at the engine inlet; Third, the annular uniform distribution of the nozzles on the spray device 110 is conducive to the uniform distribution of atomized droplets, thereby improving the uniformity of the distribution of atomized droplets drawn into the engine.

[0047] Optionally, the spray device 110 can be movably installed in the climate environment chamber 100, for example, by installing a lifting device such as a hanging rope 120 to connect the top plate of the climate environment chamber 100 and the spray device 110 respectively. This allows the spray device 110 to be raised and lowered, thereby adjusting the distance between the spray device 110 and the engine 10 to regulate the supercooling of the atomized droplets. Taking large droplets as an example, large droplets require more sufficient supercooling than other atomized droplets with smaller particle sizes. This requires large droplets to have a longer stroke during their gravity-induced descent. By raising the spray device 110 by pulling it up with the hanging rope 120, the distance between the spray device 110 and the engine 10 can be increased, thus ensuring that large droplets have sufficient descent stroke to be adequately supercooled before being sucked into the engine 10.

[0048] Optionally, regarding the specific method by which the refrigeration device 310 adjusts the temperature of the climate environment chamber 100, an air inlet duct 320 and an air outlet duct 330 can be installed on the climate environment chamber 100. The refrigeration equipment room 300 is equipped with an air duct system 340. The refrigeration device 310 is connected to the air inlet duct 320 and the air outlet duct 330 through the air duct system 340. In this way, the climate environment chamber 100 is connected to the refrigeration device 310 through the air inlet duct 320 and the air outlet duct 330, thereby enabling the refrigeration device 310 to provide cold air to the climate environment chamber 100 through the air outlet duct 330, and to cool the airflow from the air inlet duct 320, forming a circulating refrigeration and lowering the temperature in the climate environment chamber 100.

[0049] Furthermore, the heights of the outlet duct 330 and the inlet duct 320 decrease along the direction of gravity. Specifically, the outlet duct 330 is located at the top of the climate environment chamber 100, close to the spray device 110, while the inlet duct 320 is located on the side wall of the climate environment chamber 100, close to the engine 10. In this way, the outlet duct 330 delivers airflow above the climate environment chamber 100, and the inlet duct 320 absorbs airflow below the climate environment chamber 100, thereby creating a top-down airflow agitation effect in the climate environment chamber 100. Thus, in the first aspect, under the combined influence of gravity, airflow agitation, and engine 10 operation, it is more conducive to the atomized droplets being drawn into the engine 10. In the second aspect, the airflow agitation effect is conducive to the uniform distribution of the atomized liquid in the climate chamber 100, thereby improving the uniformity of the atomized droplets drawn into the engine. In the third aspect, the airflow agitation brought about by the air inlet pipe 320 and the air outlet pipe 330 is more conducive to the sufficient cooling of each position in the climate chamber 100. In the fourth aspect, based on the airflow agitation effect in the third aspect, it is more conducive to the cooling of the atomized droplets in the climate chamber 100, thereby improving the supercooling of the atomized droplets drawn into the engine.

[0050] Furthermore, the air outlet duct 330 is used to offset the engine 10 along the direction of gravity. For example, the air outlet duct 330 is arranged around the top of the climate environment chamber 100 and around the spray device 110, or the air outlet duct 330 is symmetrically arranged on both sides of the spray device 110; while the air inlet duct 320 is arranged around the side wall of the climate environment chamber 100 and around the engine 10, or symmetrically arranged on both sides of the engine 10. In a first aspect, this prevents foreign objects mixed in with the airflow entering the climate environment chamber 100 through the air outlet 330 from being sucked into the engine 10. In a second aspect, the central area of ​​the climate environment chamber 100 is used for the layout of the spray device 110 and the engine 10, while the outer area of ​​the climate environment chamber 100 surrounding the central area is used for the even distribution of the air outlet 330 and the air inlet 320. This can improve the uniformity of airflow from the air outlet 330 and the uniformity of airflow from the air inlet 320. Compared with the arrangement of the air outlet 330 and the air inlet 320 on only one side, the airflow agitation effect brought about by the above-mentioned arrangement of the air outlet 330 and the air inlet 320 will not affect the trajectory of the atomized droplets during their movement, thereby avoiding the airflow agitation effect affecting the uniform distribution of the atomized droplets at the engine inlet.

[0051] Optionally, the test apparatus also includes an air intake tower 400 connected to the climate environment chamber 100. The air intake tower 400 is located at the top of the climate environment chamber 100, and the air intake tower 400, the spray device 110 and the engine 10 are arranged in sequence along the direction of gravity. Outside air enters the climate environment chamber 100 from the bottom of the air intake tower 400.

[0052] A heat exchanger 410 and a first silencer 420 are installed in the air intake tower 400. The first silencer 420 and the heat exchanger 410 are arranged sequentially along the airflow direction. The first silencer 420 has a noise reduction function to reduce the noise generated during the airflow. The heat exchanger 410 can be configured as a plate-fin heat exchanger. The refrigerant inside the heat exchanger 410 is connected to the refrigeration device 310 through the pipeline system 350.

[0053] As can be seen from the first aspect, the refrigeration device 310, in conjunction with the heat exchanger 410, will cool the air entering the air intake tower 400, that is, cool the air entering the climate environment chamber 100, reducing the influence of the outdoor atmosphere on the temperature inside the climate environment chamber 100. The refrigeration device 310, in conjunction with the air inlet pipe 320 and the air outlet pipe 330, will perform internal circulation cooling of the air in the climate environment chamber 100. This two-stage cooling can improve the temperature adjustment effect in the climate environment chamber 100, and can lower the air in the climate environment chamber 100 to -40°C, thereby ensuring the smooth progress of the icing test. Secondly, the device of this application can achieve two levels of cooling. Specifically, if the operating power of the engine 10 is low, after the climate environment chamber 100 reaches the required cooling temperature, the air duct system 340 can be closed, thereby closing the internal circulation cooling of the climate environment chamber 100 from the cooling equipment room 300, or the opening of the air duct system 340 can be reduced to decrease the degree of internal circulation cooling, while keeping the pipe system 350 open and relying on the heat exchanger 410 to cool the external air entering the climate environment chamber 100, so as to save energy. If the operating power of the engine 10 is high, the air duct system 340 and the pipe system 350 are always kept open to simultaneously cool the external air entering the climate environment chamber 100 and cool the internal circulation cooling of the air inside the climate environment chamber 100.

[0054] Furthermore, a filter can be installed in the air intake tower 400 to filter impurities from the outside air. Even further, the air intake tower 400, the spray device 110, and the engine 10 are arranged sequentially along the direction of gravity to further ensure uniform airflow and temperature field within the climate environment chamber 100.

[0055] Optionally, the test apparatus also includes a cooling chamber 500, which is separated from the climate environment chamber 100 by a partition 130. The cooling chamber 500 can be a pit pre-buried underground. The air intake tower 400, spray device 110, engine 10, and cooling chamber 500 are arranged sequentially along the direction of gravity to save the floor space required for the test apparatus. Multiple nozzles 510 are installed on the side wall of the cooling chamber 500. The spray equipment room 200 connects to the nozzles 510 to supply water and air to the nozzles 510, allowing the nozzles 510 to spray cooled atomized droplets into the cooling chamber 500. The opening of the cooling chamber 500 is constructed with a partition 130; the partition 130 is a concrete floor slab installed on the ground. The climate environment chamber 100 and the refrigeration equipment room 300 are built on the partition 130. The partition 130 also has a passageway, and the engine 10 is fixed to the partition 130 by the fan-supported casing and installed in the passageway.

[0056] During the test, the low-temperature air in the climate environment chamber 100 enters the engine 10 and mixes with aviation fuel in the engine 10 for combustion, and outputs high-temperature exhaust to the cooling chamber 500. The high-temperature exhaust is sprayed and cooled by the cooling chamber 500 before being discharged. In this way, the partition 130 can isolate the inlet environment and outlet environment of the engine 10 from each other, preventing the high-temperature exhaust environment from interfering with the low-temperature intake environment.

[0057] Optionally, the test apparatus also includes an exhaust tower 600 connected to the cooling chamber 500, through which the gas discharged from the engine 10 will be discharged to the outside in sequence via the cooling chamber 500 and the exhaust tower 600.

[0058] Furthermore, the test device is equipped with an ejector tube 610, which is connected to the bottom of the cooling chamber 500 and the bottom of the exhaust tower 600 respectively. The height of the installation area where the nozzle 510 is located is higher than the height of the installation area where the ejector tube 610 is located. The ejector tube 610 is arranged in a horizontal direction so as to guide the gas that has been fully sprayed and cooled by the nozzle 510 to the exhaust tower 600.

[0059] The exhaust tower 600 is also equipped with a second silencer 630, a guide vane 640, and an exhaust window 620. The guide vane 640 and the second silencer 630 are arranged sequentially along the direction of gravity. The gas entering the exhaust tower 600 is first treated by the second silencer 630 to reduce noise pollution, and then guided by the guide vane 640 to adjust it to a horizontal direction, and finally discharged through the exhaust window 620.

[0060] Furthermore, the exhaust window 620 is located at a lower height than the intake tower 400, and the exhaust window 620 is located on the side of the exhaust tower 600 away from the intake tower 400, and exhausts in a direction away from the intake tower 400. This can prevent the exhaust of the exhaust tower 600 from interfering with the intake of the intake tower 400.

[0061] Optionally, the test apparatus also includes a snowmaking machine 140 located in the climate environment chamber 100, with the snowmaking machine 140 positioned on both sides of the engine 10. A spray equipment room 200 is connected to the snowmaking machine 140 to supply water and air to it. Thus, the apparatus of this application expands its ice crystal simulation capabilities by spraying atomized droplets through the spray device 110 and spraying the engine 10 through the snowmaking machine 140, thereby diversifying the ice crystal simulation methods. Specifically, the test scenarios of the test apparatus of this application include the following:

[0062] The scenario of supercooled water droplets is as follows:

[0063] The particle size of supercooled water droplets is generally 15~50μm. By installing an internal mixing air atomizing nozzle on the spray device 110 and adjusting the water pressure and air pressure through the spray equipment room 200, supercooled water droplets of the required particle size can be sprayed out.

[0064] The scenario of supercooled large water droplets is as follows:

[0065] By replacing some of the air atomizing nozzles on the spray device 110 with different models, or by replacing them with single-fluid nozzles, the two different nozzles can be combined to achieve a bimodal distribution characteristic of supercooled large water droplets. The supercooled large water droplets can be large or small, ranging from tens of micrometers to thousands of micrometers in size.

[0066] The ice crystal cloud scene is as follows:

[0067] The nozzles of the spray device 110 can be flexibly replaced. When using a combination of droplet nozzles and ice crystal nozzles, and in conjunction with the snowmaking machine 140 to assist in artificial snowmaking, a multi-concentration ice crystal cloud scene can be achieved.

[0068] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. An aircraft engine (10) icing simulation test apparatus characterized by, The application relates to a climate environment room (100) for mounting an engine (10), wherein the climate environment room (100) is provided with a spraying device (110) for spraying the engine (10) along a gravity direction; a spraying equipment room (200) connected with the spraying device (110); a refrigerating device (310) for providing cold air to the climate environment room (100); the climate environment room (100) is connected with the refrigerating device (310) through an air inlet pipe (320) and an air outlet pipe (330); the refrigerating device (310) can provide cold air to the climate environment room (100) through the air outlet pipe (330) and refrigerate air from the air inlet pipe (320); the height of the position of the air outlet pipe (330) and the height of the position of the air inlet pipe (320) decrease along the gravity direction. The spraying device (110) is movably arranged in the climate environment room (100) for adjusting the distance with the engine (10). The air outlet pipe (330) is used for staggering the engine (10) along the gravity direction. A central area in the climate environment room (100) is used for arranging the spraying device (110) and the engine (10), and a peripheral area around the central area in the climate environment room (100) is used for uniformly arranging the air outlet pipe (330) and the air inlet pipe (320). The application further comprises an air inlet tower (400) connected with the climate environment room (100), wherein a heat exchanger (410) is arranged in the air inlet tower (400), and the heat exchanger (410) is connected with the refrigerating device (310).

2. The test device of claim 1, wherein, The application further comprises a cooling room (500), 3. The test device of claim 1, wherein, The test device separates the climate environment room (100) and the cooling room (500) through a partition (130), and the partition (130) is provided with a passage for mounting the engine (10), and air in the climate environment room (100) enters the cooling room (500) through the engine (10).

4. The test device of claim 3, wherein The application further comprises an air outlet tower (600) connected with the cooling room (500).

5. The test device according to any one of claims 1 to 4, characterized in that The application further comprises a snow maker (140) arranged in the climate environment room (100) and located at the side of the engine (10).

6. The test device of claim 5, wherein, ​ ​ 7. The test device of claim 6, wherein ​ 8. The test device according to any one of claims 1 to 4, characterized in that ​

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