Temperature distortion test device and design method thereof

Abstract

The invention relates to the technical field of aero-engine tests, and discloses a temperature distortion test device and a design method thereof. An annular space between the inner casing and the inner casing forms a mixing space; the connecting assemblies are connected with the outer casing, and part of the connecting assemblies form a conveying assembly; a first input port is formed in one side wall surface of an injection part of the conveying assembly, and a second input port is formed in the other side wall surface; the gas conveying pipeline is connected with the connecting part; according to the invention, the response speed of the control valve is relatively high, so that the gas conveying pipeline can sensitively convey high-temperature gas flow, transient temperature distortion of the temperature distortion test device can be realized, and in addition, the comprehensive distortion effect can be greatly improved in a downstream and countercurrent combined mode; performance indexes of the temperature distortion test device meet test requirements of transient temperature distortion, so that the temperature distortion test device can realize transient temperature distortion by adopting a high-temperature airflow injection mode.

Description

Technical Field

[0001] The present invention relates to the technical field of aeroengine test and measurement, and particularly to a temperature distortion test device and its design method. Background Art

[0002] A temperature distortion generator is a test device used to simulate the intake air temperature environment of an aeroengine under calculated flight conditions. Temperature distortion is one of the important factors affecting the working stability of the engine. Through temperature distortion tests, researchers can evaluate the engine's response to temperature distortion in a ground test facility and optimize the design to improve its adaptability.

[0003] Temperature distortion can be divided into steady-state temperature distortion and transient temperature distortion. Compared with steady-state temperature distortion, transient temperature distortion has the characteristics of a shorter occurrence time and a higher temperature rise rate. Since it is relatively difficult to simulate transient temperature distortion, there is less research on transient temperature distortion of turboshaft engines.

[0004] Currently, the existing simulation of transient temperature distortion is mainly carried out through a hydrogen combustion temperature distortion generator. Such a simulation device has a complex structure and is relatively difficult to meet the simulation requirements. At the same time, due to the relatively violent hydrogen combustion process, such a device is also more dangerous and prone to accidents during the simulation process. Therefore, the existing simulation method of transient temperature distortion has the problem of difficult application. Summary of the Invention

[0005] In view of this, the present invention provides a temperature distortion test device and its design method to solve the problem of difficult application of the existing simulation method of transient temperature distortion.

[0006] In a first aspect, the present invention provides a temperature distortion test device, including: an outer casing, which is annularly arranged and has an installation space inside; an inner casing, which is annularly arranged and located in the installation space. The annular space between the outer casing and the inner casing forms a mixing space, and a low-temperature gas stream is suitable for being introduced axially into the mixing space; a plurality of connection components, which are circumferentially spaced along the outer casing in the mixing space. The connection components extend radially along the outer casing and are connected to the outer casing, and some of the connection components form a conveying component; the conveying component has a conveying cavity inside. The part of the conveying component located in the mixing space is an injection part, and the part of the conveying component connected to the outer casing is a connection part. Along the axis of the mixing space, one side wall surface of the injection part is provided with a first input port, and the other side wall surface is provided with a second input port. The conveying direction of the first input port is opposite to the conveying direction of the low-temperature gas stream, and the conveying direction of the second input port is the same as the conveying direction of the low-temperature gas stream; a gas pipeline, one end of which is connected to a gas source and the other end of which is connected to the connection part. The gas pipeline is used to convey a high-temperature gas stream into the conveying cavity; a control valve, which is arranged on the gas pipeline. The frequency of the control valve is greater than 1 Hz, and it is used to control the on-off of the gas pipeline.

[0007] Beneficial effects: A control valve is provided on the gas pipeline, and a first input port and a second input port are respectively provided on the injection part of the conveying assembly. Since the response speed of the control valve is relatively fast, the gas pipeline can sensitively convey high-temperature gas, enabling the temperature distortion test device to achieve transient temperature distortion. When low-temperature gas is introduced into the mixing space, high-temperature gas can be output simultaneously through the first input port and the second input port. By combining the forward flow and the reverse flow, the comprehensive distortion effect can be significantly improved, and the surface average temperature rise, the maximum temperature rise rate, and the circumferential range of the "high-temperature zone" in the temperature distortion test device can all meet the performance index requirements of the transient temperature distortion test. The entire device has a simple structure and high usage safety, enabling the temperature distortion test device to achieve transient temperature distortion by injecting high-temperature gas, and at the same time, the maximum temperature rise rate can also meet the test requirements, effectively solving the problem of the difficult application of the existing transient temperature distortion simulation method.

[0008] In an alternative embodiment, third input ports are provided on both side walls of the injection part along the circumferential direction of the mixing space.

[0009] Beneficial effects: The structural form is simple and reliable. Through the third input port, the number of input ports for high-temperature gas in the mixing space can be further increased to further improve the maximum temperature rise rate in the temperature distortion test device.

[0010] In an alternative embodiment, the included angle between the conveying direction of the third input port and the conveying direction of the second input port is an acute angle.

[0011] Beneficial effects: Arranging the third input port in this form can further increase the number of input ports for conveying high-temperature gas along the forward direction, effectively increasing the maximum temperature rise rate in the mixing space.

[0012] In an alternative embodiment, a heat insulation cover is fixedly provided on the outer wall of the injection part, and through holes are provided on the heat insulation cover corresponding to the first input port, the second input port, and the third input port.

[0013] Beneficial effects: The heat insulation cover can not only improve the overall strength of the injection part, but also effectively reduce the heat loss at the outer wall of the injection part, reducing the situation where the high-temperature gas in the injection part passes through the outer wall of the injection part in advance and exchanges heat with the mixing space, and can effectively improve the temperature of the high-temperature gas output from each input port.

[0014] In an alternative embodiment, a guiding pipe is provided at the second input port, and the guiding pipe extends along the conveying direction of the second input port, and the second input port is communicated with the mixing space through the guiding pipe.

[0015] Beneficial effects: The structure is simple and reliable. The guide pipe can change the position of the high-temperature air flow input from the second input port along the axial direction, making the high-temperature air flow output from the second input port closer to the test surface, effectively shortening the distance from the second input port to the test surface, and thus effectively improving the maximum temperature rise rate.

[0016] In an alternative embodiment, the guide pipe is detachably connected to the second input port.

[0017] Beneficial effects: The detachable connection facilitates flexible replacement of the guide pipe, which is not only convenient for maintenance, but also allows for flexible replacement of guide pipes of different lengths according to the conveying length, thereby adjusting the distance from the distortion test cross-section to the guide pipe opening, and thus adjusting various distortion performance indicators.

[0018] In a second aspect, the present invention also provides a design method for a temperature distortion test device for designing the above-mentioned temperature distortion test device, which includes:

[0019] Select the preset performance indicators required for the current test according to the preset performance indicator requirements of the transient temperature distortion test of the tested turboshaft engine;

[0020] The preset performance indicators include a preset maximum temperature rise rate, a preset surface average temperature rise, and a preset circumferential range of the high-temperature zone;

[0021] Determine the dimensions of the outer casing and the inner casing according to the dimensions of the turboshaft engine;

[0022] Determine the number of conveying components and the spacing between adjacent conveying components according to the preset circumferential range of the high-temperature zone;

[0023] Determine the structural parameters of the input port of the connection component according to the preset performance indicators;

[0024] Determine the temperature and flow rate of the high-temperature air flow according to the preset performance indicators.

[0025] Beneficial effects: By using the design method of this embodiment, the temperature distortion test device in the form of heat flux injection is improved, so that this form of temperature distortion device can not only realize transient temperature distortion simulation, but also significantly improve its maximum temperature rise rate. After the obtained temperature distortion test device is processed into a physical object and applied to the turboshaft engine component test bench, the obtained data is stable and reliable.

[0026] In an alternative embodiment, the input port includes a first input port, a second input port, and a third input port, and the structural parameters include the number of input ports, the size of the input ports, the spacing between adjacent input ports, and the conveying angle of the input ports;

[0027] The step of determining the structural parameters of the input port of the connection component according to the preset performance indicators includes:

[0028] Select multiple groups of different structural parameters;

[0029] Under the same working conditions, perform hydrodynamic simulations on each group of structural parameters respectively, and obtain the first calculation performance indexes of each group respectively;

[0030] The first calculation performance indexes include the first calculated maximum temperature rise rate, the first calculated average surface temperature rise, and the first calculated circumferential range of the high-temperature zone;

[0031] Compare the first calculation performance indexes of multiple groups of structural parameters with the preset performance indexes respectively, and select one group that meets the preset performance indexes as the structural parameters of the input port.

[0032] Beneficial effect: Through this design method, effective structural parameters of the input port can be stably obtained.

[0033] In an alternative embodiment, the temperature and flow rate of the high-temperature gas flow are the hot gas parameters of the high-temperature gas flow;

[0034] The steps of determining the temperature and flow rate of the high-temperature gas flow according to the preset performance indexes include:

[0035] Select multiple groups of different hot gas parameters;

[0036] Apply each group of hot gas parameters respectively in the temperature distortion test device of the same type, and perform numerical simulation;

[0037] Set multiple detection cross-sections at intervals along the axis of the temperature distortion test device;

[0038] Obtain the second calculation performance indexes of each group of hot gas parameters corresponding to multiple detection cross-sections;

[0039] Compare the second calculation performance indexes of multiple groups of hot gas parameters with the preset performance indexes respectively;

[0040] If the second calculation performance indexes corresponding to each detection cross-section in the hot gas parameters all meet the preset performance indexes, then select this group of hot gas parameters as the temperature and flow rate of the high-temperature gas flow.

[0041] Beneficial effect: Through this method, the temperature and flow rate of the high-temperature gas flow that can meet the test performance requirements can be stably and reliably obtained.

[0042] In an alternative embodiment, after the steps of determining the temperature and flow rate of the high-temperature gas flow according to the preset performance indexes, it further includes:

[0043] Apply the selected hot gas parameters of the high-temperature gas flow in the selected temperature distortion test device;

[0044] Obtain the third calculation performance indexes at the outlet of the temperature distortion test device;

[0045] Determine whether the third computing performance index meets the preset performance index.

[0046] Beneficial effects: Comprehensively obtain various data and perform calculation and analysis to evaluate the effectiveness of the experiment, ensuring that the temperature distortion test device obtained through the design method can stably, reliably and effectively perform temperature distortion simulation tests. Description of the Drawings

[0047] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 A three-dimensional schematic diagram of a temperature distortion test device according to an embodiment of the present invention;

[0049] Figure 2 For Figure 1 A sectional view of the conveying component of the temperature distortion test device shown;

[0050] Figure 3 For Figure 2 A schematic diagram of the simulation model of the structural parameter design of the conveying component shown;

[0051] Figure 4 For Figure 2 A schematic diagram of multiple detection planes during the simulation of the conveying component shown.

[0052] Explanation of the reference numerals in the drawings:

[0053] 1, outer casing; 2, inner casing; 3, mixing space; 4, connecting component;

[0054] 5, conveying component; 501, injection part; 502, connecting part; 503, first input port; 504, second input port; 505, third input port; 506, heat insulation cover; 507, guiding pipe; 508, connecting plate;

[0055] 6, gas pipeline. Specific Embodiments

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] The following will describe the embodiments of the present invention in conjunction with Figures 1 to 4 , to describe the embodiments of the present invention.

[0058] In the related art, methods for realizing steady-state distortion simulation include electric heating and high-temperature gas injection, etc. Such ways of realizing steady-state distortion simulation are milder, and the structure of the device is relatively simple, with the characteristics of high economy and good safety. However, precisely because the simulation method is relatively mild, it is difficult to realize transient distortion simulation. Especially in the case of high-temperature gas injection, in the simulation device using this method, since the performance indicators it can simulate cannot meet the requirements of higher transient temperature distortion test performance indicators, transient temperature distortion simulation cannot be carried out.

[0059] According to an embodiment of the present invention, on the one hand, a temperature distortion test device is provided, which includes: an outer casing 1, an inner casing 2, a plurality of connecting components 4, and a gas transmission pipeline 6. The outer casing 1 is annularly arranged and has an installation space inside; the inner casing 2 is annularly arranged and is located in the installation space. The annular space between the outer casing 1 and the inner casing 2 forms a mixing space 3, and a low-temperature gas is suitable for being axially introduced into the mixing space 3; the plurality of connecting components 4 are arranged at intervals along the circumferential direction of the outer casing 1 in the mixing space 3. The connecting components 4 extend radially along the outer casing 1 and are connected to the outer casing 1, and some of the connecting components 4 form a conveying component 5; the conveying component 5 has a conveying cavity inside. The part of the conveying component 5 located in the mixing space 3 is an injection part 501, and the part of the conveying component 5 connected to the outer casing 1 is a connecting part 502. Along the axial direction of the mixing space 3, a first input port 503 is provided on one side wall surface of the injection part 501, and a second input port 504 is provided on the other side wall surface. The conveying direction of the first input port 503 is opposite to the conveying direction of the low-temperature gas, and the conveying direction of the second input port 504 is the same as the conveying direction of the low-temperature gas; the gas transmission pipeline 6 has one end connected to a gas source and the other end connected to the connecting part 502. The gas transmission pipeline 6 is used to convey high-temperature gas into the conveying cavity; a control valve is arranged on the gas transmission pipeline 6. The frequency of the control valve is greater than 1 Hz, and it is used to control the on-off of the gas transmission pipeline 6.

[0060] Apply the temperature distortion test device of this embodiment. A control valve is provided on the gas transmission pipeline 6, and a first input port 503 and a second input port 504 are respectively provided on the injection part 501 of the conveying assembly 5. Since the response speed of the control valve is relatively fast, the gas transmission pipeline 6 can sensitively convey high-temperature air flow, enabling the temperature distortion test device to achieve transient temperature distortion. When low-temperature air flow is introduced into the mixing space 3, high-temperature air flow can be output simultaneously through the first input port 503 and the second input port 504. By combining the downstream flow and the upstream flow, the comprehensive distortion effect can be greatly improved, and the surface average temperature rise, the highest temperature rise rate, and the circumferential range of the "high-temperature area" in the temperature distortion test device can all meet the performance index requirements of the transient temperature distortion test. The entire device has a simple structure and high use safety, enabling the temperature distortion test device to achieve transient temperature distortion by means of injecting high-temperature air flow, effectively solving the problem of the difficult application of the existing transient temperature distortion simulation method.

[0061] Among them, as Figure 1 shown, the direction indicated by X is the low-temperature air flow; the surface average temperature rise, the highest temperature rise rate, and the circumferential range of the "high-temperature area" are the performance indicators.

[0062] It should be noted that there are generally two ways of injecting high-temperature air flow, namely the downstream injection method and the upstream injection method. Since the surface average temperature rise and the high-temperature area range of the upstream flow are larger than those of the downstream flow, while the highest temperature rise rate is smaller than that of the downstream flow, this embodiment is based on the upstream injection and combines the upstream flow and the downstream flow for the high-temperature air flow injection method, integrating the characteristics of the upstream flow and the downstream flow, so that the average temperature rise, the highest temperature rise rate, and the high-temperature area range indicators in the mixing space 3 all meet the requirements of transient temperature distortion simulation.

[0063] Among them, the low-temperature air flow refers to the mainstream air of the engine, and its temperature is usually the same as the ambient temperature; the high-temperature air flow refers to the higher-temperature high-temperature air flow generated after being heated by the air heating system.

[0064] Specifically, the high-temperature air flow and the low-temperature air flow mean that the temperature of the high-temperature air flow is higher than that of the low-temperature air flow. The specific temperature of the high-temperature air flow is not limited, and it can be flexibly selected between 200°C and 1000°C according to the requirements of the test performance indicators.

[0065] It should be noted that since the control valve is provided at a position on the gas transmission pipeline 6 that is relatively far from the connection part 502, the position of the control valve is not shown in the drawings. The control valve here is a high-frequency control valve, and its frequency can be 2 Hz, 5 Hz, 7 Hz and above, as long as it can sensitively and quickly convey high-temperature air flow.

[0066] During the calculation process, the higher the frequency of the control valve, the better. Preferably, the control valve is a valve body with adjustable frequency. Since the structures of the outer casing 1, the inner casing 2, and the connecting component 4 are not easy to change, while the temperature and flow rate of the input high-temperature air flow are easy to adjust, and the control valve frequency is positively correlated with the highest temperature rise rate. Therefore, using a valve body with adjustable frequency can more flexibly and conveniently adjust the performance indicators of the temperature distortion test device.

[0067] In addition, there are no restrictions on the sizes and quantities of the first input port 503 and the second input port 504. The first input port 503 and the second input port 504 can each be one, or each can be multiple, and their specifications, sizes, and spacing distances can be flexibly selected according to the calculation test requirements.

[0068] Furthermore, the outer casing 1 is used to connect with the intake duct of the turboshaft engine, and the inner casing 2 is used to cooperate with the center cone rotation stage of the turboshaft engine.

[0069] Among them, there are no restrictions on the quantity of the conveying components 5 formed in the connecting component 4. The quantity of the conveying components 5 can be flexibly selected, and the corresponding connecting component 4 can be replaced with the conveying component 5 according to the test requirements.

[0070] In a possible implementation manner, along the circumferential direction of the mixing space 3, third input ports 505 are provided on both side wall surfaces of the injection part 501. The structural form is simple and reliable. Through the third input ports 505, the number of input ports for the high-temperature air flow in the mixing space 3 can be further increased to further increase the highest temperature rise rate in the temperature distortion test device.

[0071] Among them, there are no restrictions on the sizes and quantities of the third input ports 505. They can be one or multiple, and their specifications, sizes, and spacing distances can be flexibly selected according to the calculation test requirements.

[0072] In a possible implementation manner, the included angle between the conveying direction of the third input port 505 and the conveying direction of the second input port 504 is an acute angle. Arranging the third input port 505 in this form can further increase the number of input ports for conveying the high-temperature air flow along the forward direction, and can effectively increase the highest temperature rise rate in the mixing space.

[0073] In a possible implementation manner, a heat insulation cover is fixedly provided on the outer wall of the injection part 501. The heat insulation cover is provided with through holes corresponding to the first input port 503, the second input port 504, and the third input port 505. The heat insulation cover can not only improve the overall strength of the injection part 501, but also effectively reduce the heat loss at the outer wall of the injection part 501, and reduce the situation that the high-temperature air flow in the injection part 501 passes through the outer wall of the injection part 501 in advance and exchanges heat with the mixing space 3, and can effectively increase the temperature of the high-temperature air flow output from each input port.

[0074] At present, in the related art, the maximum temperature rise rate of the temperature distortion simulation device adopting the high-temperature gas injection method can only reach dozens of Kelvin per second. However, for the temperature distortion test device of this embodiment, a control valve with a relatively fast response speed is adopted, and high-temperature gas is output simultaneously through the first input port 503, the second input port 504, and the third input port 505. In addition, a heat insulation cover is fixedly arranged on the outer wall of the injection part 501. Through the combined action of multiple means, the maximum temperature rise rate in the temperature distortion test device is greatly increased, and the maximum temperature rise rate of the device can reach more than 400 K / s. By adjusting the parameters of the high-temperature gas and the specification size of the input port, it can even reach more than 1000 K / s.

[0075] Specifically, there is no strict limitation on the specific material and type of the heat insulation cover. It can be a ceramic heat insulation layer or a heat insulation tile, etc., which can be flexibly selected according to requirements, as long as it can withstand at least high temperatures of 800 °C to 1000 °C.

[0076] In addition, the specific material of the heat insulation cover can also be the same as that of the injection part 501, which is composite steel.

[0077] In a possible implementation manner, a guiding pipe 507 is provided at the second input port 504. The guiding pipe 507 extends along the conveying direction of the second input port 504. The second input port 504 is communicated with the mixing space 3 through the guiding pipe 507. The structure is simple and reliable. The guiding pipe 507 can change the position of the high-temperature gas input by the second input port 504 along the axial direction, so that the high-temperature gas output by the second input port 504 is closer to the test surface, effectively shortening the distance from the second input port 504 to the test surface, and thus effectively improving the maximum temperature rise rate.

[0078] Specifically, there is no limitation on the length and diameter of the guiding pipe 507. The size of the guiding pipe 507 corresponds to and matches the size at the second input port 504, as long as it can stably and reliably guide the high-temperature gas.

[0079] Furthermore, there is no limitation on the connection method between the guiding pipe 507 and the second input port 504. It can be a fixed connection method such as welding connection, or it can be a detachable connection realized by threaded connection or clamping.

[0080] In a possible implementation manner, the guiding pipe 507 is detachably connected to the second input port 504. The detachable connection is convenient for flexibly replacing the guiding pipe 507, which is not only convenient for inspection and maintenance, but also can flexibly replace guiding pipes 507 with different lengths according to the conveying length, so as to adjust the distance from the distortion test cross-section to the port of the guiding pipe 507, thereby adjusting each distortion performance index.

[0081] According to an embodiment of the present invention, on the other hand, a design method for a temperature distortion test device is provided for designing the above-mentioned temperature distortion test device, which includes:

[0082] According to the preset performance index requirements of the transient temperature distortion test of the tested turboshaft engine, select the preset performance indexes required for the current test; the preset performance indexes include the preset maximum temperature rise rate, the preset surface average temperature rise, and the preset circumferential range of the high-temperature area; determine the sizes of the outer casing 1 and the inner casing 2 according to the size of the turboshaft engine; determine the number of the conveying components 5 and the spacing between adjacent conveying components 5 according to the preset circumferential range of the high-temperature area; determine the structural parameters of the input port of the connecting component 4 according to the preset performance indexes; determine the temperature and flow rate of the high-temperature air flow according to the preset performance indexes.

[0083] By using the design method of this embodiment, the temperature distortion test device in the form of heat flux injection is improved, so that this form of temperature distortion device can not only realize the simulation of transient temperature distortion, but also significantly improve its maximum temperature rise rate. After the obtained temperature distortion test device is processed into a physical object, it is applied to the turboshaft engine component test bench, and the obtained data is stable and reliable.

[0084] Specifically, the preset performance index requirements of the transient temperature distortion test are calculated and proposed by the engine model designers, and their definitions and calculation methods can refer to the "GJB / Z 211 Guide for the Evaluation of Inlet Temperature Distortion of Aero Turbine Jet and Turbine Fan Engines".

[0085] Further, determining the sizes of the outer casing 1 and the inner casing 2 according to the size of the turboshaft engine includes: determining the size of the outer casing 1 according to the diameter of the air inlet guide basin of the turboshaft engine, and determining the size of the inner casing 2 according to the diameter of the center cone rotation stage of the turboshaft engine.

[0086] In addition, since the air flow passage in the mixing space 3 is a circular straight section structure and the high-temperature air flow is supplied by multiple conveying components 5, when analyzing the influence of the high-temperature air flow in the forward and reverse directions, the analysis model remains unchanged, and the cases of only setting the first input port 503 and only setting the second input port 504 are simulated respectively. The simulation results show that: the surface average temperature rise and the high-temperature area range when the high-temperature air flow is input reversely are greater than those in the forward input case, and the maximum temperature rise rate is less than that in the forward input case. Considering the surface average temperature rise, the maximum temperature rise rate and the circumferential range index requirements of the "high-temperature area" comprehensively, the heat flux injection method based on reverse input and combined with forward input can meet the requirements of the surface average temperature rise, the maximum temperature rise rate and the circumferential range index of the "high-temperature area" required by the test at the same time.

[0087] In a possible implementation, the input ports include a first input port 503, a second input port 504, and a third input port 505. The structural parameters include the number of input ports, the size of the input ports, the spacing between adjacent input ports, and the conveying angle of the input ports.

[0088] The steps of determining the structural parameters of the input ports of the connection component 4 according to the preset performance indicators include: selecting multiple groups of different structural parameters; respectively performing hydrodynamic simulations on each group of structural parameters under the same working conditions, and respectively obtaining the first calculated performance indicators of each group. The first calculated performance indicators include the first calculated maximum temperature rise rate, the first calculated surface average temperature rise, and the first calculated circumferential range of the high-temperature zone; comparing the first calculated performance indicators of the multiple groups of structural parameters with the preset performance indicators respectively, and selecting one group that meets the preset performance indicators as the structural parameters of the input ports.

[0089] Through this design method, effective structural parameters of the input ports can be stably obtained.

[0090] It should be noted that the spacing between adjacent input ports refers to the spacing between the same type of input ports, and the conveying angle of the input ports mainly refers to the conveying angle of the third input port 505.

[0091] Specifically, the FLUENT software is used for hydrodynamic simulation, and the structural design model is as Figure 3 shown, where the high-temperature air flow output from the first input port 503 is indicated by A, the high-temperature air flow output from the third input port 505 is indicated by B and C, the high-temperature air flow output from the second input port 504 is indicated by D, the turbulence model is the SST k-w model. When analyzing, the low-temperature air flow adopts the flow inlet and pressure outlet boundary conditions, the high-temperature air flow adopts the pressure inlet condition, and the periodic model is used for analysis. One period includes a conveying component 5. By comparing the transient maximum temperature rise rate, surface average temperature rise, and "high-temperature zone" angle of the temperature distortion generator performance indicators under different structural parameters, namely the number of input ports, the size of the input ports, the spacing between adjacent input ports, and the conveying angle of the input ports, under the same working conditions, and according to the idea of analysis-design-optimization, the best combination is selected to determine the structural parameters of the conveying component 5, that is, the number of input ports, the size of the input ports, the spacing between adjacent input ports, and the conveying angle of the input ports.

[0092] Among them, the best combination is the combination of structural parameters whose first calculated performance indicators are closest to the preset performance indicators.

[0093] Furthermore, it should be noted that since the hot gas parameters of the high-temperature gas flow need to be input during the hydrodynamic simulation, the hot gas parameters input at this stage are obtained based on experience and are not accurate. Since the hot gas parameters can be adjusted later, the hot gas parameters obtained based on experience here will not affect the normal use of the temperature distortion test device completed in the subsequent design.

[0094] In a possible implementation, the temperature and flow rate of the high-temperature gas flow are the hot gas parameters of the high-temperature gas flow;

[0095] The steps of determining the temperature and flow rate of the high-temperature gas flow according to the preset performance indicators include:

[0096] Select multiple different sets of hot gas parameters;

[0097] Apply each set of hot gas parameters separately in the temperature distortion test device of the same form and conduct numerical simulation;

[0098] Set multiple detection sections at intervals along the axis of the temperature distortion test device;

[0099] Obtain the second calculated performance indicators of multiple detection sections corresponding to each set of hot gas parameters;

[0100] Compare the second calculated performance indicators of multiple sets of hot gas parameters with the preset performance indicators respectively;

[0101] If the second calculated performance indicators corresponding to each detection section in the hot gas parameters all meet the preset performance indicators, then select this set of hot gas parameters as the temperature and flow rate of the high-temperature gas flow.

[0102] Through this method, the temperature and flow rate of the high-temperature gas flow that can meet the test performance requirements can be obtained stably and reliably.

[0103] Specifically, in order to facilitate the analysis of the performance at different detection section positions, different sections are set in the data post-processing, which are 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, and 400mm away from the central plane of the conveying component 5 respectively, as Figure 4 shown, and the central plane of the conveying component 5 is indicated by E.

[0104] Model the previously determined structural parameters, use the ANSYS CFX 21R1 commercial software to conduct numerical simulation on the model, input each set of hot gas parameters into the same model respectively, obtain the second calculated performance indicators of each detection section, and select the hot gas parameters for which the second calculated performance indicators of each detection section all meet the preset performance indicators, so as to obtain the temperature and flow rate of the high-temperature gas flow that meet the test performance requirements.

[0105] Furthermore, after the structural part of the device is designed, the temperature and flow rate of the high-temperature gas flow determined through simulation at this time are relatively accurate hot gas parameters.

[0106] In a possible implementation manner, after the step of determining the temperature and flow rate of the high-temperature gas flow according to the preset performance indicators, the following steps are further included:

[0107] Applying the hot gas parameters of the selected high-temperature gas flow in the selected temperature distortion test device;

[0108] Obtaining the third calculated performance indicator at the outlet of the temperature distortion test device;

[0109] Judging whether the third calculated performance indicator meets the preset performance indicators.

[0110] Comprehensively obtaining various data and performing calculation and analysis to evaluate the effectiveness of the test, and ensuring that the temperature distortion test device obtained through the design method can stably, reliably and effectively perform the temperature distortion simulation test.

[0111] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A temperature distortion test device, characterized in that, Comprising: An outer casing (1), which is arranged in a ring shape and has an installation space inside; An inner casing (2), which is arranged in a ring shape and is located in the installation space. The annular space between the outer casing (1) and the inner casing (2) forms a mixing space (3), and a low-temperature air flow is suitable for being introduced axially into the mixing space (3); A plurality of connecting components (4), which are arranged at intervals along the circumferential direction of the outer casing (1) in the mixing space (3). The connecting components (4) extend radially along the outer casing (1) and are connected to the outer casing (1), and some of the connecting components (4) form a conveying component (5); The conveying component (5) has a conveying cavity inside. The part of the conveying component (5) located in the mixing space (3) is an injection part (501), and the part of the conveying component (5) connected to the outer casing (1) is a connecting part (502). Along the axial direction of the mixing space (3), a first input port (503) is provided on one side wall surface of the injection part (501), and a second input port (504) is provided on the other side wall surface. The conveying direction of the first input port (503) is opposite to the conveying direction of the low-temperature air flow, and the conveying direction of the second input port (504) is the same as the conveying direction of the low-temperature air flow; An air delivery pipeline (6), one end of which is connected to a gas source and the other end of which is connected to the connecting part (502). The air delivery pipeline (6) is used for delivering a high-temperature air flow into the conveying cavity; A control valve, which is arranged on the air delivery pipeline (6). The frequency of the control valve is greater than 1 Hz, and it is used to control the on-off of the air delivery pipeline (6).

2. The temperature distortion test device according to claim 1, characterized in that, Along the circumferential direction of the mixing space (3), third input ports (505) are provided on both side wall surfaces of the injection part (501).

3. The temperature distortion test device according to claim 2, wherein The included angle between the conveying direction of the third input port (505) and the conveying direction of the second input port (504) is an acute angle.

4. The temperature distortion test device according to claim 2, wherein A heat insulation cover is fixedly arranged on the outer wall of the injection part (501), and through holes are provided on the heat insulation cover corresponding to the first input port (503), the second input port (504), and the third input port (505).

5. The temperature distortion test device according to any one of claims 1 to 4, characterized in that, A guiding pipe (507) is provided at the second input port (504). The guiding pipe (507) extends along the conveying direction of the second input port (504), and the second input port (504) is communicated with the mixing space (3) through the guiding pipe (507).

6. The temperature distortion test device according to claim 5, wherein, The guiding pipe (507) is detachably connected to the second input port (504).

7. A design method for a temperature distortion test device, which is used to design the temperature distortion test device described in claim 1, characterized in that, Comprising: According to the preset performance index requirements of the transient temperature distortion test of the tested turboshaft engine, select the preset performance index required for the current test; The preset performance index includes a preset maximum temperature rise rate, a preset surface average temperature rise, and a preset circumferential range of the high-temperature area; Determine the sizes of the outer casing (1) and the inner casing (2) according to the size of the turboshaft engine; Determine the number of the conveying components (5) and the spacing between adjacent conveying components (5) according to the preset circumferential range of the high-temperature area; Determine the structural parameters of the input ports of the connecting components (4) according to the preset performance index; Determine the temperature and flow rate of the high-temperature gas flow according to the preset performance indicators.

8. The design method of the temperature distortion test device according to claim 7, characterized in that The input port includes a first input port (503), a second input port (504), and a third input port (505), and the structural parameters include the number of input ports, the size of the input ports, the spacing between adjacent input ports, and the conveying angle of the input ports; The steps of determining the structural parameters of the input port of the connection component (4) according to the preset performance indicators include: Select multiple groups of different said structural parameters; Under the same working conditions, perform hydrodynamic simulations on each group of said structural parameters respectively, and obtain the first calculated performance indicators of each group respectively; The first calculated performance indicators include the first calculated maximum temperature rise rate, the first calculated surface average temperature rise, and the first calculated circumferential range of the high-temperature zone; Compare the first calculated performance indicators of multiple groups of said structural parameters with the preset performance indicators respectively, and select one group that meets the preset performance indicators as the structural parameters of the input port.

9. The design method of the temperature distortion test device according to claim 7, characterized in that, The temperature and flow rate of the high-temperature gas flow are the hot gas parameters of the high-temperature gas flow; The steps of determining the temperature and flow rate of the high-temperature gas flow according to the preset performance indicators include: Select multiple groups of different said hot gas parameters; Apply each group of said hot gas parameters respectively in the temperature distortion test device of the same type, and perform numerical simulation; Arrange a plurality of detection cross-sections at intervals along the axis of the temperature distortion test device; Obtain the second calculated performance indicators corresponding to each group of said hot gas parameters for multiple said detection cross-sections; Compare the second calculated performance indicators of multiple groups of said hot gas parameters with the preset performance indicators respectively; If the second calculated performance indicators corresponding to each said detection cross-section in the hot gas parameters all meet the preset performance indicators, then select this group of hot gas parameters as the temperature and flow rate of the high-temperature gas flow.

10. The design method of the temperature distortion test device according to claim 9, characterized in that, After the steps of determining the temperature and flow rate of the high-temperature gas flow according to the preset performance indicators, it further includes: Apply the selected hot gas parameters of the high-temperature gas flow in the selected temperature distortion test device; Obtain the third calculated performance indicator at the outlet of the temperature distortion test device; Judge whether the third calculated performance indicator meets the preset performance indicators.

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