Freezing simulation test device for aero-engine

Abstract

The invention provides an aeroengine icing simulation test device, which comprises a climate environment chamber used for installing an engine, and is characterized in that the climate environment chamber is provided with a spraying device which is used for corresponding to the engine along the gravity direction; the spraying equipment room is connected with a spraying device; and the refrigerating device is used for providing cold air for the climate environment chamber. It can be seen that compared with a horizontal icing test device in the related technology, in the first aspect, the vertical structure of the test device can make full use of the height space and save the occupied area, and then the construction cost is reduced; on the second aspect, the vertical structure can utilize gravity, and atomized liquid drops can be sucked into the engine to complete an icing test; and on the third aspect, the nozzles on the spraying device are annularly and uniformly distributed, so that uniform distribution of sprayed atomized liquid drops is facilitated, and the distribution uniformity degree of the atomized liquid drops sucked into the engine is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine test equipment, in particular to an aero-engine icing simulation test device. BACKGROUND

[0002] Under icing weather conditions, aero-engine icing brings great threat to the safe operation of the engine: engine icing may cause engine thrust to decrease, inlet distortion to increase, and mechanical damage caused by ice shedding impacting engine blades. According to the accident investigation, the forms of aero-engine icing are various, not only the icing of inlet components caused by supercooled water and supercooled large water droplets, but also the internal icing of the engine caused by ice crystals. Therefore, the airworthiness regulations at home and abroad have specific requirements for the operation of the engine under the above icing weather conditions, and require that during the engine development and certification phase, the engine airworthiness compliance verification is carried out by combining calculation analysis and test verification.

[0003] In the related art, horizontal icing simulation devices such as open-air platforms and high-altitude platforms are commonly used to carry out engine icing tests to complete the relevant verification, but the horizontal icing simulation devices have a large floor area, and for the horizontal icing simulation devices, since the suction direction of the engine is horizontal, the self-weight of the atomized droplets will affect the uniformity of the distribution of the atomized droplets at the engine suction port, and the gravity settling action of the supercooled large water droplets makes it even less likely to achieve uniformity at the engine suction port, and the above engine icing platform does not have the ability to simulate ice crystals. SUMMARY

[0004] The present application is exactly to solve the above technical problems, and its purpose is to provide an aero-engine icing simulation test device, which can solve the problems of large floor area caused by horizontal arrangement of the test device in the related art, non-uniform distribution of supercooled large water droplets at the engine inlet, and lack of ability to simulate ice crystals.

[0005] The present application discloses an aero-engine icing simulation test device, which comprises a climate environment room, a spray equipment room, a refrigeration equipment room and a fuel room. The climate environment room is used to install the engine and is provided with a spray device, the spray device is used to spray the engine vertically downward along the gravity direction, the spray device is provided with a plurality of spray heads, the spray heads are uniformly distributed in a plurality of rings, and the rings are uniformly distributed from the inside to the outside, so as to ensure the uniformity of the distribution of the sprayed atomized droplets in the climate environment room; and the fuel room is used to provide fuel for the installed engine to ensure the normal operation of the engine during the test.

[0006] The spray equipment room is connected with the spray device to supply water and air to the spray device, so that the spray head on the spray device sprays the atomized liquid droplets to the engine. The water and air supply pressure of the spray equipment room is adjustable. By adjusting the pressure parameter, the spray device can spray atomized liquid droplets of different particle sizes, thereby forming a test scene with different particle size distributions in the climate environment room. At the same time, the spray equipment room is provided with a liquid nitrogen device connected with the liquid nitrogen pipeline in the spray device to spray nitrogen to the ice crystal nozzle atomization core area to generate ice crystals.

[0007] The refrigeration device is arranged in the refrigeration equipment room. The refrigeration device is used to cool the air inlet tower and reduce the influence of outdoor air on the temperature of the climate environment room. On the other hand, the refrigeration device is used to provide cold air to the climate environment room to adjust the temperature in the climate environment room. Thus, under the refrigeration of the refrigeration device, the atomized liquid droplets sprayed by the spray device will be fully supercooled, and will be sucked into the engine under the action of gravity and the suction of the engine to complete the icing test.

[0008] It can be seen that, compared with the horizontal icing test device in the related art, in a first aspect, the vertical structure of the test device of the present application can make full use of the height space and save the floor area, thereby reducing the construction cost. In a second aspect, the vertical structure can utilize gravity to facilitate the suction of atomized liquid droplets, especially large water droplets, into the engine to complete the icing test. In a third aspect, the annular distribution of the spray heads on the spray device facilitates the uniform distribution of the atomized liquid droplets, thereby improving the uniformity of the distribution of the atomized liquid droplets in the engine. In a fourth aspect, the ice crystal spray head is used to replace part of the atomized spray head of the nozzle device, and the snow making machine is used to simulate the ice crystal cloud artificially.

[0009] Optionally, the spray device is movably arranged in the climate environment room to adjust the distance between the spray device and the engine to adjust the supercooling degree of the atomized liquid droplets. Taking large liquid droplets as an example, compared with other smaller atomized liquid droplets, large liquid droplets need more supercooling. Therefore, the large liquid droplets need to have a greater falling distance during the gravity falling process. By lifting the spray device through the hanging rope, the distance between the spray device and the engine can be increased, thereby ensuring that the large liquid droplets have sufficient falling distance before being sucked into the engine to be fully supercooled.

[0010] Optionally, the climate environment room is connected with the refrigeration device through the air inlet pipe and the air outlet pipe. The refrigeration device can provide cold air to the climate environment room through the air outlet pipe, and cool the air from the air inlet pipe to form a circulating refrigeration to reduce the temperature in the climate environment room.

[0011] Optionally, the height of the air outlet pipe and the height of the air inlet pipe decrease along the direction of gravity. Specifically, the air outlet pipe is arranged at the top of the climate environment chamber and is arranged close to the spraying device, and the air inlet pipe is arranged at the side wall of the climate environment chamber and is arranged close to the engine. In this way, the air outlet pipe transports air flow above the climate environment chamber, and the air inlet pipe absorbs air flow below the climate environment chamber, so as to form an air flow stirring effect from top to bottom in the climate environment chamber. In this way, in the first aspect, under the multiple influences of gravity, air flow stirring, and engine operation, the atomized droplets are more easily sucked into the engine, and in the second aspect, under the influence of the air flow stirring effect, the atomized liquid is evenly distributed in the climate environment chamber, thereby improving the uniform distribution effect of the atomized droplets sucked into the engine.

[0012] Optionally, the air outlet pipe is arranged to be staggered with the engine along the direction of gravity. For example, the air outlet pipe is arranged to surround the top of the climate environment chamber and surround the spraying device, and the air inlet pipe is arranged to surround the side wall of the climate environment chamber and surround the engine. In this way, in the first aspect, foreign matter mixed in the air flow entering the climate environment chamber along the air outlet pipe can be prevented from being sucked into the engine, and in the second aspect, the air outlet uniformity of the air outlet pipe and the air inlet uniformity of the air inlet pipe can be improved, so that the air flow stirring effect of the climate environment chamber is more evenly distributed.

[0013] Optionally, a central region in the climate environment chamber is used for layout of the spraying device and the engine, and a peripheral region surrounding the central region in the climate environment chamber is used for uniform distribution of the air outlet pipe and the air inlet pipe.

[0014] Optionally, the test device further comprises an air inlet tower connected to the climate environment chamber. The air inlet tower is arranged at the top of the climate environment chamber, and the air inlet tower, the spraying device, and the engine are arranged in sequence along the direction of gravity. External air enters the climate environment chamber from the bottom of the air inlet tower. The air inlet tower is provided with a heat exchanger and a first silencer. The first silencer and the heat exchanger are arranged in sequence along the air flow direction. The first silencer has a noise reduction effect to reduce noise generated during air flow. The heat exchanger can be a plate-fin heat exchanger. The internal coolant of the heat exchanger is connected to the refrigeration device through a pipeline system.

[0015] It can be seen that in the first aspect, the refrigeration device cooperates with the heat exchanger to refrigerate the air entering the air intake tower, that is, to refrigerate the air entering the climate environment room from the outside, and the refrigeration device cooperates with the air intake pipe and the air outlet pipe to internally circulate and refrigerate the air in the climate environment room. The two-stage cooling can improve the temperature adjustment effect in the climate environment room, and can reduce the air in the climate environment room to-40°C, thereby ensuring the smooth progress of the icing test. In the second aspect, the device can realize two refrigeration modes. Specifically, if the operating power of the engine is small, after the climate environment room reaches the required refrigeration temperature, the air pipe system can be closed, and the internal circulation refrigeration of the climate environment room in the refrigeration device can be closed, or the opening degree of the air pipe system can be reduced to reduce the degree of internal circulation refrigeration, while the pipe system is kept open and relies on the heat exchanger to refrigerate the external air entering the climate environment room, thereby saving energy. If the operating power of the engine is large, the air pipe system and the pipe system are always kept open to simultaneously refrigerate the external air entering the climate environment room and the air internally circulating in the climate environment room.

[0016] Optionally, the device further comprises a cooling room, and the climate environment room and the cooling room are separated by a partition plate, and the partition plate is provided with a passage for mounting the engine. The air in the climate environment room with cloud droplets or ice crystal particles is sucked into the engine air intake system and finally discharged into the cooling room. During the test, the low-temperature cloud in the climate environment room is sucked into the air intake duct of the engine, and then the engine air intake component is frozen. The high-temperature exhaust gas of the engine is discharged into the cooling room, and the high-temperature exhaust gas is cooled by the cooling room and then discharged. In this way, the engine inlet environment and the outlet environment can be isolated from each other by the partition plate to prevent the high-temperature exhaust gas environment from interfering with the low-temperature intake environment.

[0017] Optionally, the device further comprises an exhaust tower communicating with the cooling room. The exhaust gas discharged from the engine will pass through the cooling room and the exhaust tower in sequence and then be discharged outward.

[0018] Optionally, an exhaust window is arranged on the side of the exhaust tower away from the air intake tower, and the exhaust window discharges exhaust gas away from the air intake tower. In this way, the exhaust gas of the exhaust tower can avoid interfering with the intake of the air intake tower.

[0019] Optionally, the device further comprises a snow maker arranged in the climate environment room and located at the side of the engine. In this way, the device sprays atomized droplets and ice crystals through the spray device combined with the nozzle, and artificially makes snow in the climate environment room through the snow maker, thereby having the ability to simulate ice crystals at multiple concentrations and diversifying the ice crystal simulation means. Specifically, the test scene of the test device has the following scenarios:

[0020] The supercooled water droplet scenario is as follows:

[0021] The particle size of the supercooled water droplets is generally 15-50 mu m, the inner-mixing air atomizing nozzle is installed on the spraying device, and the water pressure and air pressure are adjusted between the spraying devices to spray the supercooled water droplets with a particle size suitable for the required size.

[0022] The supercooled large water droplet scene is as follows:

[0023] The model of part of the air atomizing nozzles on the spraying device is replaced or replaced by single-fluid nozzles, so that the spraying of the two different nozzles is combined to realize the bimodal distribution characteristics of the supercooled large water droplet particle size, and the supercooled large water droplet particle size is large or small, and the particle size range is from tens of microns to thousands of microns.

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

[0025] The nozzle of the spraying device can be flexibly replaced, and when the liquid droplet nozzle and the ice crystal nozzle are combined to work, the artificial snow making of the snow making machine is combined to realize the ice crystal cloud scene under multiple concentrations.

[0026] The beneficial effects of the present application are as follows:

[0027] The present application discloses an aero-engine icing simulation test device, comprising: a climate environment room for installing an engine, the climate environment room being provided with a spraying device and a snow making machine, wherein the spraying device is provided with nozzles of different structures to generate atomized liquid droplets or ice crystal particles, and the atomized liquid droplets or ice crystal particles are sucked into the air inlet of the engine in the direction of gravity, and the snow making machine is used to spray the low-temperature environment room to rapidly freeze into ice crystal particles during the ice crystal cloud test; a spraying equipment room connected with the spraying device; and a refrigeration device for providing cold air to the climate environment room. It can be seen that, compared with the horizontal icing test device in the related art, in a first aspect, the vertical structure of the test device of the present application can fully utilize the height space and save the floor area, thereby reducing the construction cost; in a second aspect, in the prior art, the horizontal layout of the icing simulation device, the suction direction of the engine is horizontal, so that the self-weight of the atomized liquid droplets will affect the uniformity of the distribution of the atomized liquid droplets in the air inlet of the engine, and the self-weight of the supercooled large liquid droplets is particularly obvious, and the icing simulation device of the present application is a vertical structure, so that the suction direction of the engine is vertical and consistent with the direction of gravity, and the self-weight of the atomized liquid droplets will not affect the uniformity of the distribution of the atomized liquid droplets in the air inlet of the engine, and the use of gravity is also conducive to the suction of the atomized liquid droplets into the engine to complete the icing test; in a third aspect, the annular distribution of the nozzles on the spraying device is conducive to the uniform distribution of the spraying of the atomized liquid droplets, thereby improving the uniformity of the distribution of the atomized liquid droplets in the engine; in a fourth aspect, part of the atomizing nozzles of the nozzle device is replaced by ice crystal nozzles, and the snow making machine can realize artificial simulation of the ice crystal cloud. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above features and advantages of the present application will be better understood by reading the following detailed description of the embodiments of the application, taken in conjunction with the drawings. In the drawings, each component is not necessarily drawn to scale, and components of similar or identical function or structure can be designated with identical or similar reference numerals.

[0029] Figure 1 is a top view of the test device of the present application;

[0030] Figure 2 is an internal structure diagram of the test device of the present application.

[0031] Explanation of Reference Signs:

[0032] 10 - engine,

[0033] 100 - climate chamber, 110 - spray device, 120 - hanging rope, 130 - partition, 140 - snow maker,

[0034] 200 - spray equipment room,

[0035] 300 - refrigeration equipment room, 310 - refrigeration device, 320 - air inlet pipe, 330 - air outlet pipe, 340 - air pipe system, 350 - pipeline system,

[0036] 400 - air inlet tower, 420 - first silencer, 410 - heat exchanger,

[0037] 500 - cooling chamber, 510 - nozzle,

[0038] 600 - exhaust tower, 610 - ejector cylinder, 620 - exhaust window, 630 - second silencer, 640 - guide vane,

[0039] 700 - fuel room. DETAILED DESCRIPTION

[0040] The present application will be further described with reference to the accompanying drawings in which specific embodiments of the application are illustrated. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other specific embodiments of the present application comprising combinations of the features of the application can be employed without departing from the scope of the present application. Accordingly, it will be understood that the present application is not intended to be limited to the specific embodiments described and illustrated herein, but is to be accorded the full scope that comprises all file equivalents of a range of values including upper and lower limits, including prior art equivalents and equivalent ranges.

[0041] It is to be noted that these and other accompanying drawings are merely illustrative, not drawn to scale, and should not be used to construe the scope of the present application.

[0042] The present application will be further described with reference to the accompanying drawings in which specific embodiments of the application are illustrated. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other specific embodiments of the present application comprising combinations of the features of the application can be employed without departing from the scope of the present application. Accordingly, it will be understood that the present application is not intended to be limited to the specific embodiments described and illustrated herein, but is to be accorded the full scope that comprises all file equivalents of a range of values including upper and lower limits, including prior art equivalents and equivalent ranges. Figure 1 and Figure 2 The present application will be further described with reference to the accompanying drawings in which specific embodiments of the application are illustrated. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other specific embodiments of the present application comprising combinations of the features of the application can be employed without departing from the scope of the present application. Accordingly, it will be understood that the present application is not intended to be limited to the specific embodiments described and illustrated herein, but is to be accorded the full scope that comprises all file equivalents of a range of values including upper and lower limits, including prior art equivalents and equivalent ranges.

[0043] The application discloses an aero-engine 10 icing simulation test device, comprising: a climate environment room 100, a spraying equipment room 200, a refrigeration equipment room 300 and a fuel room 700. The climate environment room 100 is used for installing the engine 10 and is provided with a spraying device 110 corresponding to the engine 10 in the direction of gravity. The spraying device 110 is provided with multiple spray heads which are uniformly distributed in multiple rings and are uniformly distributed from the inside to the outside, so that the distribution uniformity of the sprayed atomized liquid droplets in the climate environment room 100 is ensured. The fuel room 700 is used for providing fuel for the installed engine 10 and ensuring the normal operation of the engine 10 in the test process.

[0044] The spraying equipment room 200 is connected with the spraying device 110 to supply water and gas to the spraying device 110, so that the spray heads on the spraying device 110 spray atomized liquid droplets to the engine 10. The water and gas supply pressure of the spraying equipment room 200 can be adjusted. By adjusting the pressure parameter, the spraying device 110 can spray atomized liquid droplets with different particle sizes, so that different particle size distribution test scenes are formed in the climate environment room 100. Meanwhile, the spraying equipment room 200 is provided with a liquid nitrogen device. The liquid nitrogen device is connected with a liquid nitrogen pipeline in the spraying device 110 to spray nitrogen to the ice crystal spray head atomization core area of the spraying device 110 to generate ice crystals.

[0045] The refrigeration equipment room 300 is provided with a refrigeration device 310 which is used for providing cold air to the climate environment room 100 to adjust the temperature in the climate environment room 100. Thus, under the refrigeration effect of the refrigeration device 310, the atomized liquid droplets sprayed by the spraying device 110 will be condensed into ice crystals and will be sucked into the engine under the action of gravity and the suction of the engine 10 to complete the icing test.

[0046] It can be seen that, compared with the horizontal icing test device in the related art, in a first aspect, the vertical structure of the test device of the application can fully utilize the height space and save the floor area, thereby reducing the construction cost. In a second aspect, in the horizontal layout icing simulation device in the prior art, the suction direction of the engine is horizontal, so that the self-weight of the atomized liquid droplets will affect the distribution uniformity of the atomized liquid droplets at the suction inlet of the engine, and the self-weight of the supercooled large droplets is particularly obvious. The icing simulation device of the application is a vertical structure, so that the suction direction of the engine is vertical and consistent with the direction of gravity. The self-weight of the atomized liquid droplets will not affect the distribution uniformity of the atomized liquid droplets at the suction inlet of the engine, and the gravity is also conducive to the suction of the atomized liquid droplets into the engine to complete the icing test, especially for the supercooled large droplets, which is more conducive to the uniform distribution of the supercooled large droplets at the engine inlet. In a third aspect, the ring-shaped uniform distribution of the spray heads on the spraying device 110 is conducive to the uniform distribution of the sprayed atomized liquid droplets, thereby improving the distribution uniformity of the atomized liquid droplets sucked into the engine.

[0047] Optionally, the spraying device 110 is movably arranged in the climate environment chamber 100, such as a hanging rope 120 or the like for lifting, to be connected to the top of the climate environment chamber 100 and the spraying device 110 respectively, so as to realize the lifting of the spraying device 110, and further adjust the distance between the spraying device 110 and the engine 10, to realize the adjustment of the supercooling degree of the atomized droplets. Taking large droplets as an example, compared with other smaller atomized droplets, large droplets need more supercooling, which requires a larger falling distance of the large droplets. By pulling and lifting the spraying device 110 through the hanging rope 120, the distance between the spraying device 110 and the engine 10 can be increased, so as to ensure that the large droplets have sufficient falling distance before being sucked into the engine 10 to be fully supercooled.

[0048] Optionally, for the specific way of adjusting the temperature of the climate environment chamber 100 by the refrigeration device 310, the air inlet pipe 320 and the air outlet pipe 330 can be arranged on the climate environment chamber 100. The air pipe system 340 is arranged in the refrigeration equipment room 300, and the refrigeration device 310 is connected to the air inlet pipe 320 and the air outlet pipe 330 through the air pipe system 340. In this way, the climate environment chamber 100 is connected to the refrigeration device 310 through the air inlet pipe 320 and the air outlet pipe 330, so that the refrigeration device 310 can provide cold air to the climate environment chamber 100 through the air outlet pipe 330, and the refrigeration device 310 can refrigerate the air flow from the air inlet pipe 320 to form a circulating refrigeration, thereby reducing the temperature in the climate environment chamber 100.

[0049] Further, 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 direction of gravity. Specifically, the air outlet pipe 330 is arranged at the top of the climate environment chamber 100, close to the spraying device 110, and the air inlet pipe 320 is arranged on the side wall of the climate environment chamber 100, close to the engine 10. In this way, the air outlet pipe 330 transports air flow above the climate environment chamber 100, and the air inlet pipe 320 absorbs air flow below the climate environment chamber 100, so as to form an air flow stirring effect from top to bottom in the climate environment chamber 100. In the first aspect, under the influence of gravity, air flow stirring and engine 10 operation, the atomized droplets are more easily sucked into the engine 10. In the second aspect, under the influence of the air flow stirring effect, the atomized liquid is more evenly distributed in the climate environment chamber 100, thereby improving the uniformity of the atomized droplets sucked into the engine. In the third aspect, the air flow stirring caused by the air inlet pipe 320 and the air outlet pipe 330 is more conducive to the cooling of each position in the climate environment chamber 100. In the fourth aspect, based on the influence of the air flow stirring effect in the third aspect, the atomized droplets are more easily cooled in the climate environment chamber 100, thereby improving the supercooling degree of the atomized droplets sucked into the engine.

[0050] Further, the air outlet pipe 330 is arranged to deviate from the engine 10 along the gravity direction. For example, the air outlet pipe 330 is arranged to surround the top of the climate environment room 100 and to surround the spray device 110, or the air outlet pipe 330 is symmetrically arranged on both sides of the spray device 110; and the air inlet pipe 320 is arranged to surround the sidewall of the climate environment room 100 and to surround the engine 10, or the air inlet pipe 320 is symmetrically arranged on both sides of the engine 10. In this way, in a first aspect, foreign matters mixed in the airflow entering the climate environment room 100 along the air outlet pipe 330 can be prevented from being sucked into the engine 10, and in a second aspect, the central area in the climate environment room 100 is used for layout of the spray device 110 and the engine 10, and the peripheral area surrounding the central area in the climate environment room 100 is used for uniform distribution of the air outlet pipe 330 and the air inlet pipe 320, so that the air outlet uniformity of the air outlet pipe 330 and the air inlet uniformity of the air inlet pipe 320 can be improved. Compared with the layout mode of the air outlet pipe 330 and the air inlet pipe 320 on one side, the airflow stirring effect caused by the layout mode of the air outlet pipe 330 and the air inlet pipe 320 will not affect the trajectory of the atomized liquid droplets in the movement process, so as to avoid the influence of the airflow stirring effect on the uniform distribution of the atomized liquid droplets at the inlet of the engine.

[0051] Optionally, the test device further comprises an air inlet tower 400 connected to the climate environment room 100, the air inlet tower 400 is arranged at the top of the climate environment room 100, and the air inlet tower 400, the spray device 110 and the engine 10 are sequentially arranged along the gravity direction, and the external air enters the climate environment room 100 from the bottom of the air inlet tower 400.

[0052] The heat exchanger 410 and the first silencer 420 are arranged in the air inlet tower 400, the first silencer 420 and the heat exchanger 410 are sequentially arranged along the airflow flow direction, the first silencer 420 has a noise reduction effect to reduce the noise generated in the airflow passing process; the heat exchanger 410 can be a plate-fin heat exchanger, and the internal cold carrier of the heat exchanger 410 is connected to the refrigeration device 310 through the pipeline system 350.

[0053] It can be seen that in the first aspect, the refrigeration device 310 cooperates with the heat exchanger 410 to refrigerate the air entering the air intake tower 400, i.e. to refrigerate the air entering the outdoor climate environment room 100, thereby reducing the influence of the outdoor atmosphere on the temperature in the climate environment room 100, and the refrigeration device 310 cooperates with the air intake pipe 320 and the air outlet pipe 330 to refrigerate the air in the climate environment room 100 in an internal circulation manner, so that the two-stage cooling can improve the temperature adjustment effect in the climate environment room 100, and the air in the climate environment room 100 can be reduced to -40°C, thereby ensuring the smooth progress of the icing test. In the second aspect, the device of the present application can realize two-stage refrigeration. Specifically, if the operating power of the engine 10 is small, after the climate environment room 100 reaches the required refrigeration temperature, the air pipe system 340 can be closed, and the internal circulation refrigeration of the climate environment room 100 by the refrigeration device room 300 can be stopped, or the opening degree of the air pipe system 340 can be reduced to reduce the degree of internal circulation refrigeration, while the pipe system 350 is kept open, and the external air entering the climate environment room 100 is refrigerated by the heat exchanger 410, thereby saving energy. If the operating power of the engine 10 is large, the air pipe system 340 and the pipe system 350 are always kept open to refrigerate the external air entering the climate environment room 100 and the air in the climate environment room 100 in an internal circulation manner at the same time.

[0054] Further, a filter screen can be arranged in the air intake tower 400 to filter impurities in the air from the outside. Further, the air intake tower 400, the spray device 110 and the engine 10 are arranged in sequence along the direction of gravity, further ensuring the uniformity of the air flow and temperature field in the climate environment room 100.

[0055] Optionally, the test device further comprises a cooling room 500, and the test device is separated into the climate environment room 100 and the cooling room 500 by the partition 130. The cooling room 500 can be a pit pre-buried into the ground, the air intake tower 400, the spray device 110, the engine 10 and the cooling room 500 are arranged in sequence along the direction of gravity to save the land area required for the construction of the test device, a plurality of nozzles 510 are arranged on the side wall of the cooling room 500, the spray device room 200 is connected to the nozzles 510 to supply water and gas to the nozzles 510, so that the nozzles 510 spray cooled atomized liquid droplets in the cooling room 500, and the pit opening of the cooling room 500 is provided with the partition 130; the partition 130 is a concrete floor slab installed on the ground, and the climate environment room 100 and the refrigeration device room 300 are built on the partition 130; at the same time, the partition 130 is provided with a passage opening, and the engine 10 is fixed around the support point of the fan force machine case on the partition 130 and installed in the passage opening.

[0056] During the test, the low-temperature air in the climate environment chamber 100 enters the engine 10, mixes with the aviation fuel and burns, and outputs high-temperature exhaust gas to the cooling chamber 500, which is sprayed and cooled by the cooling chamber 500 and then discharged; in this way, by arranging the partition plate 130, the inlet environment and the outlet environment of the engine 10 can be isolated from each other, preventing the high-temperature exhaust gas environment from interfering with the low-temperature inlet air environment.

[0057] Optionally, the test device further comprises an exhaust tower 600 connected to the cooling chamber 500, and the exhaust gas discharged by the engine 10 will pass through the cooling chamber 500 and the exhaust tower 600 in sequence and then be discharged to the outside.

[0058] Further, the test device is provided with an ejector cylinder 610, which is connected to the bottom of the cooling chamber 500 and the bottom of the exhaust tower 600, respectively, and the height of the installation area of the nozzle 510 is higher than the height of the installation area of the ejector cylinder 610, and the ejector cylinder 610 is horizontally arranged to guide the gas fully sprayed and cooled by the nozzle 510 into the exhaust tower 600.

[0059] The exhaust tower 600 is further provided with a second silencer 630, a flow guide vane 640 and an exhaust window 620. The flow guide vane 640 and the second silencer 630 are arranged in sequence along the direction of gravity, the gas entering the exhaust tower 600 is first subjected to noise reduction treatment by the second silencer 630 to prevent noise pollution, then is guided by the flow guide vane 640 to adjust to the horizontal direction, and finally is discharged by the exhaust window 620.

[0060] Further, the height of the position of the exhaust window 620 is lower than the height of the position of the air inlet tower 400, and the exhaust window 620 is arranged on the side of the exhaust tower 600 away from the air inlet tower 400 and discharges the exhaust gas in a direction away from the air inlet tower 400, so that the exhaust gas of the exhaust tower 600 does not interfere with the intake of the air inlet tower 400.

[0061] Optionally, the test device further comprises a snow maker 140 arranged in the climate environment chamber 100, and the snow maker 140 is arranged on both sides of the engine 10. The spray equipment room 200 is connected to the snow maker 140 to supply water and air to the snow maker 140. In this way, the device of the present application sprays atomized droplets through the spray device 110 and sprays mist to the engine 10 through the snow maker 140, thereby expanding the ice crystal simulation capability and diversifying the ice crystal simulation means. Specifically, the test scene of the test device of the present application has the following several scenarios:

[0062] The supercooled water droplet scenario is as follows:

[0063] The particle size of the supercooled water droplets is generally 15-50 μm, and an internal mixing type air atomizing nozzle is installed on the spray device 110, and the water pressure and air pressure are adjusted by the spray equipment room 200 to spray supercooled water droplets with a particle size suitable for the required size.

[0064] Supercooled large water droplet scene, specifically as follows:

[0065] Replace the model of the air atomizing nozzle on the spray device 110, or replace it with a single-fluid nozzle, so that the two different nozzle combinations spray, realizing the bimodal distribution characteristics of the supercooled large water droplet particle size, the supercooled large water droplet particle size is large and small, and the particle size range is from tens of microns to thousands of microns.

[0066] Ice crystal cloud scene, specifically as follows:

[0067] The nozzle of the spray device 110 can be flexibly replaced, and when working in combination with the liquid droplet nozzle and the ice crystal nozzle, and combining the snow making machine 140 to assist artificial snow making, the ice crystal cloud scene under multiple concentrations is realized.

[0068] Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not deviate from the technical solutions of the present application, falls within the protection scope defined by the claims of the present application.

Claims

1. An aircraft engine icing simulation test device, characterized in that, include: A climate environment chamber (100) for mounting an engine (10) is provided with a spray device (110) for corresponding to the engine (10) in the direction of gravity. Spraying equipment room (200), connected to the spraying device (110); A refrigeration unit (310) is used to provide cold air to the climate environment room (100).

2. The experimental apparatus according to claim 1, characterized in that, The spray device (110) is movably disposed in the climate environment chamber (100) for adjusting the distance between it and the engine (10).

3. The experimental apparatus according to claim 1, characterized in that, The climate environment chamber (100) is connected to the refrigeration device (310) through an air inlet pipe (320) and an air outlet pipe (330); The refrigeration device (310) is capable of supplying cold air to the climate environment chamber (100) through the air outlet duct (330) and cooling the air from the air inlet duct (320).

4. The experimental apparatus according to claim 3, characterized in that, The height of the outlet pipe (330) and the height of the inlet pipe (320) decrease along the direction of gravity.

5. The test apparatus according to claim 4, characterized in that, The air outlet duct (330) is used to offset the engine (10) along the direction of gravity.

6. The experimental apparatus according to claim 5, characterized in that, The central area of ​​the climate environment chamber (100) is used for the layout of the spray device (110) and the engine (10), and the outer area of ​​the climate environment chamber (100) surrounding the central area is used for the even distribution of the air outlet pipe (330) and the air inlet pipe (320).

7. The test apparatus according to any one of claims 1 to 6, characterized in that, It also includes an air intake tower (400) connected to the climate environment chamber (100), in which a heat exchanger (410) is provided, and the heat exchanger (410) is connected to a refrigeration unit (310).

8. The test apparatus according to claim 7, characterized in that, It also includes a cooling chamber (500). The test apparatus separates the climate chamber (100) and the cooling chamber (500) by a partition (130), and the partition (130) is provided with a passage for installing the engine (10). Air in the climate chamber (100) enters the cooling chamber (500) through the engine (10).

9. The test apparatus according to claim 8, characterized in that, It also includes an exhaust tower (600) that connects to the cooling chamber (500).

10. The test apparatus according to any one of claims 1 to 6, characterized in that, It also includes a snowmaking machine (140) located in the climate environment chamber (100) and on the side of the engine (10).

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