Jet temperature distortion generator

Abstract

The application discloses a jet type temperature distortion generator and belongs to the technical field of aero-engine testing. The jet type temperature distortion generator comprises an air inlet outer ring, an air inlet inner ring and a hot flow support plate. The air inlet outer ring is sleeved on the air inlet outer ring, a gas passage is formed between the air inlet outer ring and the air inlet inner ring, an outward flange is formed on one end of the air inlet outer ring close to the convex ring, and a plurality of mounting tables are uniformly and interval arranged on the outer wall of the air inlet outer ring in the circumferential direction. The hot flow support plate is mounted on the mounting table, and the hot flow support plate penetrates through the air inlet outer ring in the radial direction of the air inlet outer ring and extends into the gas passage. One end of the hot flow support plate on the outer side of the air inlet outer ring is used for being connected with a high-temperature gas source, and the other end of the hot flow support plate on the inner side of the air inlet outer ring is provided with an air outlet hole. The application has the effect of conveniently simulating different temperature distortion fields in the temperature distortion test of a turboshaft engine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engine test, in particular, to a jet type temperature distortion generator. BACKGROUND

[0002] The temperature distortion generator is one of the important devices for evaluating the aerodynamic stability of the engine in the development process of the aero-engine, and it is required to accurately simulate the working range of various temperature distortion sources. Unlike turbojet / turbofan engines, there are great differences in the working environment of turboshaft engines. For example, the inlet flow of the turboshaft engine is greatly affected by the downwash flow of the helicopter rotor. The unique maneuvers of the helicopter, such as vertical take-off, hovering, side flight, and reverse flight, make the engine exhaust gas reabsorbed into the engine under the action of the downwash flow of the rotor, so that the turboshaft engine faces a unique temperature distortion. The present application provides a novel temperature distortion generating device, which heats the airflow in the external heat exchanger and then introduces it into the engine inlet through a pipeline, aiming to simulate the temperature distortion condition suitable for the actual use process of the turboshaft engine.

[0003] The Civil Aviation Authority of China Airworthiness Regulation "Aero-engine Airworthiness Regulation" (CCAR-33-R2) clearly stipulates that the extreme inlet distortion or inlet temperature shall not cause engine surge or stall. The inlet distortion mainly includes pressure distortion and temperature distortion. Compared with pressure distortion, the research on temperature distortion is relatively lagging behind, and the research on temperature distortion for turboshaft engines is even less. In the actual use process of the engine, it is almost impossible to completely avoid the inlet temperature distortion.

[0004] At present, the working medium combustion is the main means for simulating the temperature distortion of turbojet / turbofan engines at home and abroad. This method does not meet the unique use environment of the turboshaft engine, and greatly affects the safety of the test stand. For the working medium combustion type temperature distortion device, there are disadvantages such as complex structure, difficult to control combustion, large total pressure loss, certain risk of fuel storage and use, and combustion will produce more impurities, which will worsen the inlet environment and increase the degree of examination of the engine to some extent, which poses a great risk to the whole machine test. At the same time, considering that the requirement of the inlet temperature distortion of the civil turboshaft engine for the maximum temperature rise rate is about 100K / s, it does not require a high temperature rise rate, and it is difficult to meet the steady-state distortion and transient distortion indicators at the same time. Therefore, the working medium combustion type temperature distortion generator is not suitable for turboshaft engines. For the axial inlet aero turboshaft engine with power front output structure, since the inlet plane is an annular plane, and there is a limitation of the installation of the hydraulic dynamometer, the space is limited, and the design difficulty of the temperature distortion device is greater. Therefore, it is the premise and key to evaluate and verify the aerodynamic stability of the turboshaft engine under the condition of the limit inlet temperature distortion to innovatively design a temperature distortion device suitable for the aero turboshaft engine. SUMMARY

[0005] The application provides a jet temperature distortion generator to solve the technical problem of difficulty in simulating a temperature distortion field in a temperature distortion test of a civil turboshaft engine.

[0006] According to an aspect of the application, a jet temperature distortion generator is provided, which comprises an air inlet outer ring, an air inlet inner ring and a hot flow support plate; one end of the air inlet inner ring is connected with a mounting edge of an engine force cylinder, and the other end of the air inlet inner ring is formed with a convex ring; the air inlet outer ring is sleeved on the air inlet outer ring, a gas passage is formed between the air inlet outer ring and the air inlet inner ring, an outwardly turned edge is formed on one end of the air inlet outer ring close to the convex ring, and a plurality of mounting tables are uniformly and spacedly arranged on the outer wall of the air inlet outer ring in the circumferential direction; the hot flow support plate is mounted on the mounting table and extends into the gas passage through the air inlet outer ring in the radial direction of the air inlet outer ring, one end of the hot flow support plate on the outer side of the air inlet outer ring is connected with a high-temperature gas source, and the other end of the hot flow support plate on the inner side of the air inlet outer ring is formed with a gas outlet hole.

[0007] Through the above scheme, the air inlet outer ring is a double-twisted wire structure, air is introduced in the circumferential direction, and air can flow without separation to ensure that the air inlet is basically lossless; the plurality of circumferentially uniformly distributed mounting tables arranged on the air inlet outer ring provide mounting positions for the hot flow support plate; the air inlet inner ring is mounted on the mounting edge of the engine force cylinder through bolt connection, thereby achieving the air inlet rectification function of the engine; the temperature distortion generator is additionally provided with the hot flow support plate on the basis of the air inlet outer ring, holes are arranged on the hot flow support plate, and hot flow is introduced into the generator passage, thereby forming an uneven temperature field at the engine inlet cross section; each hot flow support plate is a unit, and each unit can work independently; by changing the number of hot flow support plates working at the same time, different circumferential temperature distortion fields can be realized; by rotating the mounting angle position of each hot flow support plate, the jet direction of the hot flow can be changed, and scientific research tests can be performed; by modifying the structure of the hot flow support plate, the diameter, number and radial distribution of the small holes through which the hot flow passes can be changed, thereby realizing different radial temperature distortion fields, simulating different distortion indexes of turboshaft engines, and improving the reliability of the temperature distortion test of the entire aviation turboshaft engine.

[0008] Optionally, the hot flow support plate comprises a hot flow passage plate and a straight-through pipe joint, the straight-through pipe joint is connected with the high-temperature gas source, and a plurality of gas outlet holes are uniformly and spacedly arranged on the hot flow passage plate in the length direction.

[0009] Through the above scheme, the hot flow support plate is composed of the hot flow passage plate and the straight-through pipe joint, the straight-through pipe joint is connected with an external airflow heating system, and the hot flow is sprayed out from the gas outlet holes through the cavity in the hot flow passage plate.

[0010] Optionally, the hot flow passage plate is formed with a connecting ring, the mounting table is formed with a groove for accommodating the connecting ring, and the connecting ring is rotationally matched with the groove of the mounting table.

[0011] Through the above scheme, the cooperation of the connecting ring and the groove can position the heat flow support plate in the radial direction, so that the heat flow support plate can only rotate in the circumferential direction to adjust the angle, the position will not move, and the stability is good.

[0012] Optionally, a plurality of connecting holes are arranged on the connecting ring in an axial direction, a plurality of threaded holes corresponding to the connecting holes are arranged in the groove of the mounting table, a bolt is arranged in the connecting hole and matched with the threaded hole, and the relative rotation of the connecting ring and the groove matches the connecting hole with different threaded holes to adjust the orientation of the air outlet hole of the heat flow support plate.

[0013] Through the above scheme, when the angle of the heat flow support plate is adjusted, the connecting hole and the different threaded hole are aligned and the bolt is arranged therein according to the positions of the connecting hole and the threaded hole, so that the heat flow support plate can be stably locked and fixed at different angles.

[0014] Optionally, a measuring ring is fixed on the outer wall of the air inlet outer ring, a measuring pressure cavity is formed between the measuring ring and the outer wall of the air inlet outer ring, a plurality of holes communicating with the measuring pressure cavity are uniformly arranged on the side wall of the air inlet outer ring in an axial direction, and a static pressure seat for installing a pressure detection device is arranged on the measuring ring.

[0015] Through the above scheme, the pressure in the measuring pressure cavity is the average pressure value of the multiple-point pressure uniformly distributed in the circumferential direction of the air inlet outer ring inner flow channel in the measuring cavity, which can be calibrated according to the blowing test result to obtain the relationship between the static pressure and the air flow, and the flow entering the engine is calculated in real time during the engine test; the pressure in the measuring pressure cavity can be detected by installing the pressure detection device on the static pressure seat, and by arranging a plurality of static pressure seats, the detection values of a plurality of pressure detection devices can be compared to determine whether the detection result is incorrect.

[0016] Optionally, the air inlet outer ring is provided with a clamp assembly at an end away from the flange, and the clamp assembly is used to press the air inlet outer ring against the mounting edge of the engine air inlet.

[0017] Optionally, the clamp assembly comprises a clamp belt, one end of the clamp belt is provided with a T bolt, the other end of the clamp belt is provided with a T sleeve cap, the T bolt passes through the T sleeve cap and is threadedly connected with a nut.

[0018] Optionally, the clamp assembly further comprises two arc-shaped clamping rings, and the clamp belt is sleeved on the two clamping rings to form an annular structure.

[0019] According to another aspect of the present application, there is also provided a jet temperature distortion generating system, which comprises the above-mentioned jet temperature distortion generator, and further comprises a gas source station, a heater and a mixing flow guide device, the gas source station is connected with a normal-temperature gas pipeline and a high-temperature gas pipeline, the normal-temperature gas is connected with the mixing flow guide device, the high-temperature gas pipeline is connected with the mixing flow guide device through the heater, and the output end of the mixing flow guide device is connected with a plurality of branch pipelines which are connected with the hot flow branch plates of the jet temperature distortion generator one by one.

[0020] Further, the normal-temperature gas pipeline is provided with a first electric regulating valve, and the high-temperature gas pipeline is provided with a second electric regulating valve.

[0021] Through the above-mentioned scheme, the gas source is supplied by the vehicle platform gas source station and is adjusted to the required pressure through the pressure reducing valve. The gas source is divided into two ways after the pressure reducing valve, one way is the high-temperature gas pipeline which is heated through the heater, and the other way is the normal-temperature pipeline which directly flows through the pipeline. After mixing and flowing through the mixing flow guide device, the two pipelines are branched into a plurality of pipelines which enter the temperature distortion generator of the test piece. The heater is composed of two stages, the first stage has a fixed heating power, and the second stage has a stepless heating power to achieve the purpose of precise temperature control. The high-temperature gas pipeline and the normal-temperature gas pipeline are respectively provided with electric regulating valves, which are used to control the size of the air flow through closed-loop control with the mass flow meter and to control the temperature through closed-loop control with the temperature sensor by adjusting the proportion of the normal-temperature gas and the high-temperature gas.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] The inlet outer ring has a double-twisted wire structure and realizes circumferential air inlet, which can realize air flow without separation and ensure that the air inlet has no loss. The plurality of circumferentially uniformly distributed mounting tables provided on the inlet outer ring provide mounting positions for the hot flow branch plates. The inlet inner ring is mounted on the engine force cylinder mounting edge through bolts to realize the air inlet rectification function of the engine. The temperature distortion generator is additionally provided with the hot flow branch plates on the basis of the inlet outer ring, and the hot flow branch plates are perforated to pass hot flow into the generator channel to form an uneven temperature field at the engine inlet cross section. Each hot flow branch plate is a unit, and each unit can work independently. By changing the number of hot flow branch plates working at the same time, different circumferential temperature distortion fields can be realized. By rotating the mounting angle position of each hot flow branch plate, the jet direction of the hot flow can be changed for scientific research and testing. By modifying the structure of the hot flow branch plate, the diameter, number and radial distribution of the small holes through which the hot flow passes can be changed to realize different radial temperature distortion fields, simulate different distortion indexes of turboshaft engines, and improve the reliability of the temperature distortion test of the whole aero turboshaft engine.

[0024] In addition to the above-described objects, features and advantages, the present application has other objects, features and advantages. These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated by reference herein. The drawings are not intended to limit the application in any way.

[0026] Figure 1 is a schematic view of the structure of a spray type temperature distortion generator according to a preferred embodiment of the present application;

[0027] Figure 2 is a schematic view of the distribution of a hot flow passage plate according to a preferred embodiment of the present application;

[0028] Figure 3 is a schematic view of the structure of an air inlet outer ring according to a preferred embodiment of the present application;

[0029] Figure 4 is a schematic view of the cross-sectional structure of a hot flow branch plate according to a preferred embodiment of the present application

[0030] Figure 5 is a schematic view of the structure of a clamp assembly according to a preferred embodiment of the present application;

[0031] Figure 6 is a schematic view of the structure of a spray type temperature distortion generator system according to a preferred embodiment of the present application.

[0032] LEGEND

[0033] 1, air inlet inner ring; 2, air inlet outer ring; 21, mounting platform; 3, hot flow branch plate; 31, hot flow passage plate; 32, straight-through pipe joint; 33, air outlet hole; 34, connecting ring; 35, connecting hole; 4, clamp assembly; 41, clamp band; 42, T bolt; 43, T sleeve cover cap; 44, clasp; 5, measuring ring; 6, static pressure seat; 7, air supply station; 8, heater; 9, mixing flow guide device; 10, first electrically operated regulating valve; 11, second electrically operated regulating valve; 12, first pneumatic on-off valve; 13, second pneumatic on-off valve. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described in detail with reference to the drawings, but the present application can be implemented in various different ways as defined and covered by the following description.

[0035] The embodiments of the present application will be described in detail with reference to the drawings, but the present application can be implemented in various different ways as defined and covered by the following description. Figures 1-6 The embodiments of the present application will be described in detail with reference to the drawings, but the present application can be implemented in various different ways as defined and covered by the following description.

[0036] The embodiments of the present application will be described in detail with reference to the drawings, but the present application can be implemented in various different ways as defined and covered by the following description.

[0037] With reference to Figure 1 , the injection type temperature distortion generator includes an intake inner ring 1, an intake outer ring 2, and heat flow branches 3. One end of the intake inner ring 1 is connected to the mounting edge of the engine force cylinder, and the other end of the intake inner ring 1 is formed with a convex ring. The intake outer ring 2 is sleeved on the intake outer ring 2, and the gas passage is formed between the intake outer ring 2 and the intake inner ring 1. The end of the intake outer ring 2 close to the convex ring is formed with a flange outward, and the outer wall of the intake outer ring 2 is uniformly and spacedly provided with a plurality of mounting tables 21. The intake inner ring 1 is connected to the engine force cylinder, which ensures the stability and directness of the gas flow, and the convex ring shape helps to guide the airflow. The intake outer ring 2 is sleeved on the inner ring, and the gas passage between them allows the gas to flow uniformly, while the flange of the outer ring close to the convex ring end helps to further guide and stabilize the airflow. The plurality of mounting tables 21 on the outer wall provide fixing points for the heat flow branches 3, and these branches can accurately control the distribution and direction of heat flow, thereby effectively simulating and generating the required temperature distortion field to meet the test requirements of the aero turboshaft engine under different working conditions. Such design not only improves the efficiency and adaptability of the generator, but also enhances its reliability and accuracy in practical application.

[0038] Optionally, the intake outer ring 2 adopts a double-twisted wire structure, which optimizes the gas flow path through carefully designed geometry, reduces the occurrence of airflow separation and turbulence, thereby reducing resistance and improving intake efficiency. Such design not only ensures smoother and continuous gas flow, similar to smooth movements and breathing in yoga, but also maintains the stability and uniform distribution of airflow under various operating conditions, thereby improving the reliability and performance of the entire system.

[0039] With reference to Figure 2 , the heat flow branches 3 are installed on the mounting tables 21, and the heat flow branches 3 extend into the gas passage along the radial direction of the intake outer ring 2. One end of the heat flow branches 3 located outside the intake outer ring 2 is connected to the high-temperature gas source, and the other end of the heat flow branches 3 located inside the intake outer ring 2 is provided with an air outlet hole 33. By being installed on the mounting tables 21 and extending into the gas passage along the radial direction of the intake outer ring 2, the heat flow branches 3 can directly intervene in the gas flow path, thereby effectively transferring heat from the high-temperature gas source to the flowing gas. The high-temperature gas source connected to the outside of the heat flow branches 3 ensures stable and controllable heat energy supply, while the air outlet hole 33 on the inside allows hot gas to flow uniformly into the main airflow. Such configuration enables the heat flow branches 3 not only to realize real-time heating of the flowing gas, but also to accurately control the temperature distribution of the airflow by adjusting the intensity of the heat source or changing the number and position of the heat flow branches 3, thereby meeting the strict requirements of the aero engine on temperature uniformity and specific temperature distortion patterns under different working conditions.

[0040] With reference to Figure 3 and Figure 4The hot flow branch plate 3 includes a hot flow passage plate 31 and a straight-through pipe joint 32 for connecting with a high-temperature gas source, and a plurality of gas outlet holes 33 are uniformly and lengthwise arranged on the hot flow passage plate 31. The straight-through pipe joint 32 serves as a reliable and efficient connection point for the hot flow passage plate 31 to ensure stable heat energy transmission. The design of the hot flow passage plate 31 allows the high-temperature gas to be pre-distributed along the length direction of the plate before entering the main gas flow, and the uniformly arranged gas outlet holes 33 further ensure the uniformity of the hot gas flow when injected into the main flow

[0041] A connecting ring 34 is formed on the hot flow passage plate 31, and a groove for accommodating the connecting ring 34 is formed on the mounting table 21, and the connecting ring 34 is rotationally fitted with the groove of the mounting table 21. After the connecting ring 34 is inserted into the groove, the hot flow branch plate 3 can be rotated on the mounting table 21, and this rotational fitting allows the operator to adjust the angle of the hot flow branch plate 3 as needed, thereby changing the injection direction and distribution of the hot flow. This design not only ensures the stability of the hot flow branch plate 3 during operation, preventing any unnecessary vibration or movement under the action of gas flow pressure, but also provides flexibility in adjustment, allowing the system to more accurately control and adjust the temperature distribution in the gas flow to adapt to different test conditions and requirements. By simply rotating the hot flow branch plate 3, complex temperature distortion field simulation can be achieved.

[0042] A plurality of connecting holes 35 are axially spaced apart on the connecting ring 34, and corresponding threaded holes are formed in the groove of the mounting table 21, and bolts are used to pass through the connecting holes 35 and cooperate with the threaded holes, and the relative rotation of the connecting ring 34 and the groove causes the connecting holes 35 to cooperate with different threaded holes to adjust the orientation of the gas outlet holes 33 on the hot flow branch plate 3. By selecting different connecting holes 35 to cooperate with the threaded holes and using bolts to fix, the operator can finely adjust the angle of the hot flow branch plate 3, thereby changing the direction of the hot flow injected from the gas outlet holes 33. This design allows the position of the hot flow branch plate 3 to be multi-point locked as needed, ensuring its stability and accuracy under high-speed gas flow and high-temperature conditions. At the same time, this adjustable fixing method provides high flexibility and repeatability, allowing users to quickly and accurately set and adjust the distribution and direction of the hot flow according to different test requirements.

[0043] Optionally, each hot stream branch plate 3 is installed with a high-response solenoid valve at the front end of the straight pipe joint 32 inlet, which can flexibly adjust the hot stream flow of each unit. As an independent working unit, each hot stream branch plate 3 can adjust the flow of high-temperature gas in real time through the solenoid valve, thereby accurately controlling the temperature and heat flow intensity at each position. This high degree of regulation allows the system to quickly respond and adjust according to specific needs, achieving complex and precise temperature distortion field simulation. In addition, the use of high-response solenoid valves also enhances the reliability and safety of the system, as they can quickly shut off the hot stream when needed to prevent overheating or other potential risks

[0044] The hot stream passage plate 31 of the hot stream branch plate 3 adopts an elliptical surface, which can adapt to the intake requirements of different engines and minimize the flow and pressure loss caused by the branch plate itself. The streamline shape of the elliptical surface is more consistent with the natural trajectory of gas flow, which can reduce turbulence and fluid resistance, so that the gas flows more smoothly through the hot stream branch plate 3. This design not only improves the flow efficiency of the gas and reduces energy loss, but also helps to maintain a more stable pressure and temperature distribution, thereby improving the performance and reliability of the entire system.

[0045] In specific embodiments, by changing the installation direction of the hot stream branch plate 3, the jet direction of the gas outlet hole 33 can be changed, and the hot stream branch plate 3 has four angle jetting capabilities: reverse jetting, forward jetting, left oblique jetting, and right oblique jetting. The independent structure of each branch plate allows different types of combinations of jetting directions, thereby adjusting the temperature distortion field. By replacing the hot stream branch plate 3, the temperature distortion field can be adjusted by changing the small hole diameter, the number of small holes, the radial distribution of small holes, and the jet angle of small holes.

[0046] The measuring ring 5 is fixed on the outer wall of the intake outer ring 2, and a measuring pressure cavity is formed between the measuring ring 5 and the outer wall of the intake outer ring 2. A plurality of holes are uniformly opened on the side wall of the intake outer ring 2 in the axial direction and are in communication with the measuring pressure cavity. A static pressure seat 6 for installing a pressure detection device is arranged on the measuring ring 5. The measuring ring 5 is fixed on the outer wall of the intake outer ring 2, and the measuring pressure cavity formed can capture and homogenize the pressure readings from different positions, which is realized by the plurality of holes opened on the side wall of the intake outer ring 2. These holes allow the pressure in the cavity to reflect the average pressure of the surrounding gas. The static pressure seat 6 installed on the measuring ring 5 allows the installation of a pressure detection device (such as a sensor), which in turn monitors the homogenized pressure in real time. Such a design makes the pressure measurement more accurate and comprehensive, providing key pressure data for the system, which is crucial for ensuring the stability of the engine operation, conducting accurate aerodynamic performance analysis, and meeting safety requirements. By accurately monitoring and adjusting the gas pressure, the performance of the engine can be optimized to ensure its reliability and efficiency under various working conditions.

[0047] Referring to Figure 5, the end of the air inlet outer ring 2 away from the turn-up is provided with a clamp assembly 4, which is used to press the air inlet outer ring 2 tightly against the engine air inlet mounting edge. The clamp assembly 4 is firmly fixed to the engine air inlet mounting edge by surrounding and pressing the end of the air inlet outer ring 2, which not only ensures the stability and air tightness of the structure, prevents the connection from loosening due to vibration or pressure changes during operation, but also allows relatively quick and easy installation and disassembly. By using the clamp assembly 4, the overall integrity and performance of the air intake system can be ensured, while simplifying the maintenance and repair process, improving the reliability and efficiency of the system.

[0048] The clamp assembly 4 includes a clamp band 41, one end of which is provided with a T bolt 42, and the other end is provided with a T sleeve cap 43, the T bolt 42 passes through the T sleeve cap 43 and is screwed with a nut. The clamp band 41 is wrapped around the air inlet outer ring 2, and through the combination of the T bolt 42 and the T sleeve cap 43, the clamp band 41 can be easily adjusted and tightened, so as to ensure the close fit between the air inlet outer ring 2 and the engine air inlet. The design of the T bolt 42 allows users to accurately control the pressing force by rotating the nut, so as to ensure sufficient sealing and stability, and avoid damage caused by excessive tightening

[0049] The clamp assembly 4 also includes two circular arc-shaped clamping rings 44, and the clamp band 41 is sleeved on the two clamping rings 44 to form a ring structure. When the clamp band 41 is sleeved on the two clamping rings 44, they form a complete ring together, which not only can evenly distribute the tightening pressure and avoid local over-tightening or loosening, but also can increase the strength and durability of the entire connection structure. This ring structure can maintain uniform pressure on the air inlet outer ring 2 during tightening, ensuring the sealing effect with the engine air inlet and reducing the possibility of gas leakage. At the same time, this design also facilitates installation and disassembly, improves the efficiency and convenience of maintenance, and ensures that the work can be quickly and reliably completed when maintenance or replacement of parts is required

[0050] Different heat flow injection angles result in different pressure losses. In the reverse injection state, the direction of heat flow injection is opposite to the direction of air intake, which can cause more pressure loss. The heat flow injection angle and flow can be adjusted, and the air intake pressure distortion condition and temperature distortion condition can be simulated

[0051] Reference Figure 6The embodiment also discloses a jet type temperature distortion generating system, which comprises the jet type temperature distortion generator, and further comprises a gas source station 7, a heater 8 and a mixing and guiding device 9. The gas source station 7 is connected with a normal-temperature gas pipeline and a high-temperature gas pipeline. The normal-temperature gas is connected with the mixing and guiding device 9. The high-temperature gas pipeline is connected with the mixing and guiding device 9 after passing through the heater 8. The mixing and guiding device 9 is connected with a plurality of branch pipelines. The branch pipelines are connected with the heat flow branch plates 3 of the jet type temperature distortion generator one by one. The gas source station 7 provides stable normal-temperature and high-temperature gas sources. The gases are transmitted through the pipelines and heated to the required temperature in the heater 8. The mixing and guiding device 9 allows the two kinds of gases to be mixed in a precisely controlled ratio to achieve a specific temperature and flow rate. Then, the mixed gases are distributed to each heat flow branch plate 3 of the jet type temperature distortion generator through the branch pipelines. In this way, each heat flow branch plate 3 can receive the gases with precise temperature and pressure, allowing the system to simulate various complex temperature distortion conditions. This design not only improves the accuracy and repeatability of temperature control, but also provides flexibility and adaptability.

[0052] Optionally, the heater 8 is composed of two-stage heaters 8. The first stage has a fixed heating power, and the second stage has a stepless adjustment of the heating power to achieve precise temperature control. A first electric regulating valve 10 is arranged on the normal-temperature gas pipeline, and a second electric regulating valve 11 is arranged on the high-temperature gas pipeline. The two valves can perform two functions. One is to control the air flow by closed-loop control with the mass flow meter. The other is to form a closed-loop control with the temperature sensor to control the temperature by adjusting the ratio of the normal-temperature gas and the high-temperature gas.

[0053] A second starting on-off valve is arranged between the mixing and guiding device 9 and the branch pipelines. The mixing and guiding device 9 is further connected with a first pneumatic on-off valve 12. Before the test, the heater 8 continuously works for preheating. The temperature and flow rate are adjusted by the heater 8, the first electric regulating valve 10 and the second electric regulating valve 11. The first pneumatic on-off valve 12 is interlocked with a second pneumatic on-off valve 13. During the test, the first pneumatic on-off valve 12 is opened to release the high-temperature gas to the test piece, and the first pneumatic on-off valve 12 is closed at the same time. During the test process, the temperature is accurately controlled by fine adjustment of the first electric regulating valve 10, the second electric regulating valve 11 and the heater 8.

[0054] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A jet type temperature distortion generator, characterized in that: comprising an intake outer ring (2), an intake inner ring (1) and a hot flow support plate (3); one end of the intake inner ring (1) is used for connecting with the mounting edge of the engine force cylinder, and the other end of the intake inner ring (1) is formed with a convex ring; the intake outer ring (2) is sleeved on the intake inner ring (1), a gas passage is formed between the intake outer ring (2) and the intake inner ring (1), an outward flange is formed on one end of the intake outer ring (2) close to the convex ring, and a plurality of mounting tables (21) are uniformly and circumferentially arranged on the outer wall of the intake outer ring (2); the hot flow support plate (3) is mounted on the mounting table (21), and the hot flow support plate (3) extends into the gas passage along the radial direction of the intake outer ring (2), one end of the hot flow support plate (3) on the outside of the intake outer ring (2) is used for connecting with a high-temperature gas source, and the other end of the hot flow support plate (3) on the inside of the intake outer ring (2) is provided with a gas outlet hole (33); the hot flow support plate (3) comprises a hot flow passage plate (31) and a straight-through pipe joint (32), the straight-through pipe joint (32) is used for connecting with the high-temperature gas source, and a plurality of gas outlet holes (33) are uniformly and circumferentially arranged on the hot flow passage plate (31) along the length direction; a connecting ring (34) is formed on the hot flow passage plate (31), a groove for accommodating the connecting ring (34) is formed on the mounting table (21), and the connecting ring (34) is rotationally matched with the groove of the mounting table (21); a plurality of connecting holes (35) are axially and circumferentially arranged on the connecting ring (34), a threaded hole corresponding to the connecting hole (35) is formed in the groove of the mounting table (21), a bolt matched with the threaded hole is arranged in the connecting hole (35), and the relative rotation of the connecting ring (34) and the groove makes the connecting hole (35) matched with different threaded holes to adjust the orientation of the gas outlet hole (33) on the hot flow support plate (3).

2. The jet type temperature distortion generator according to claim 1, characterized in that: a measuring ring (5) is fixed on the outer wall of the intake outer ring (2), a measuring pressure cavity is formed between the measuring ring (5) and the outer wall of the intake outer ring (2), a plurality of holes communicating with the measuring pressure cavity are uniformly and axially formed on the side wall of the intake outer ring (2), and a static pressure seat (6) for mounting a pressure detection device is arranged on the measuring ring (5).

3. The jet type temperature distortion generator according to claim 2, characterized in that: a clamp assembly (4) is arranged on the end of the intake outer ring (2) away from the flange, and the clamp assembly (4) is used for pressing the intake outer ring (2) against the mounting edge of the engine air inlet.

4. The jet type temperature distortion generator according to claim 3, characterized in that: the clamp assembly (4) comprises a clamp band (41), one end of the clamp band (41) is provided with a T bolt (42), the other end of the clamp band (41) is provided with a T sleeve cap (43), the T bolt (42) passes through the T sleeve cap (43) and is threadedly connected with a nut.

5. The jet type temperature distortion generator according to claim 4, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The hoop assembly (4) further comprises two circular-arc-shaped clamping rings (44), and the band (41) is sleeved on the two clamping rings (44) to form a ring structure.

6. A jet temperature distortion generating system comprising the jet temperature distortion generator according to any one of claims 1-5, characterized in that: Further comprising a gas source station (7), a heater (8) and a mixing flow guide device (9), the gas source station (7) is connected with a normal temperature gas pipeline and a high temperature gas pipeline, the normal temperature gas is connected with the mixing flow guide device (9), the high temperature gas pipeline is connected with the mixing flow guide device (9) through the heater (8), the output end of the mixing flow guide device (9) is connected with a plurality of branch pipelines, and the branch pipelines are connected with the hot flow branch plates (3) of the jet temperature distortion generator one by one.

7. The jet temperature distortion generating system according to claim 6, characterized in that: The normal temperature gas pipeline is provided with a first electric regulating valve (10), and the high temperature gas pipeline is provided with a second electric regulating valve (11).

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