A single / double-tube full-size intermediate casing aerodynamic performance tester

Abstract

A single / double-containment full-size intermediate casing aerodynamic performance tester belongs to the field of aero-engine test equipment. The present invention includes an inlet section, a single / double-containment full-size intermediate casing, a measuring section, a transfer section, a branch section and a vacuum air source. The single / double-containment full-size intermediate casing is installed between the inlet section and the measuring section. The branch section is installed with the measuring section through the transfer section. The branch section includes a straight pipe and a curved pipe. The straight pipe passes through the outer wall of the curved pipe and is inserted into the inner side of the curved pipe. One end of the straight pipe and the curved pipe is installed with the transfer section. An inner flow regulating cone, an inner flow meter and an inner stop valve are installed on the straight pipe in sequence. An outer flow regulating cone, an outer flow meter and an outer stop valve are installed on the curved pipe in sequence. One end of the straight pipe and the curved pipe is installed with the transfer section. The other end of the straight pipe and the curved pipe is connected to the vacuum air source. The present invention provides a high-quality blowing test equipment for the intermediate casing, and provides necessary support for the research on the flow mechanism of the intermediate casing.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine testing and relates to an intermediate casing aerodynamic performance tester. Background Art

[0002] The intermediate casing is a key component in aircraft engines, playing a supporting and diverting role. The research on the aerodynamic performance of the intermediate casing mainly uses numerical simulation methods, and there are relatively few experimental test methods. At present, the research on this issue at home and abroad mainly uses the fan model method and the scaled full model method for testing. The main reason is that there is still a lack of high-quality intermediate casing testers that can meet the full-size, especially those with double ducts, in China.

[0003] Therefore, proposing a full-size intermediate casing aerodynamic performance tester that can be applied to single or double casings is of great significance for the research on intermediate casing test technology of turbofan engines. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems. A brief summary of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this summary is not an exhaustive summary of the present invention. It is not intended to determine the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] The technical solution of the present invention:

[0006] A single / double-containment full-size intermediate casing aerodynamic performance tester comprises an inlet section, a single / double-containment full-size intermediate casing, a measuring section, a transfer section, a branch section, an inner flow regulating cone, an outer flow regulating cone, an inner flow meter, an outer flow meter, an inner stop valve, an outer stop valve and a vacuum air source. The single / double-containment full-size intermediate casing is installed between the inlet section and the measuring section. The branch section is installed with the measuring section through the transfer section. The branch section comprises a straight pipe and a curved pipe. The straight pipe passes through the outer wall of the curved pipe and is inserted into the inner side of the curved pipe. One end of the straight pipe and the curved pipe is installed with the transfer section. The inner flow regulating cone, the inner flow meter and the inner stop valve are installed on the straight pipe in sequence. The outer flow regulating cone, the outer flow meter and the outer stop valve are installed on the curved pipe in sequence. One end of the straight pipe and the curved pipe is installed with the transfer section. The other end of the straight pipe and the curved pipe is connected to the vacuum air source.

[0007] Preferably, the branch pipe section separates the inner and outer culverts of the single / double culvert full-size intermediate casing into two independent pipelines, and the straight pipe and the curved pipe of the branch pipe section are coaxially sleeved.

[0008] Preferably: the curved pipe includes a first curved pipe section and a second straight pipe section, the straight pipe passes through the outer wall of the first curved pipe section and is inserted into the first curved pipe section, the first curved pipe section is connected to the second straight pipe section after the diameter of the first curved pipe section is shrunk, the inner diameter of the second straight pipe section is equal to the inner diameter of the straight pipe, and the outer culvert flow regulating cone, the outer culvert flowmeter and the outer culvert stop valve are installed on the second straight pipe section in sequence.

[0009] Preferably, the transition section comprises an inner tube section and an outer tube section, the inner tube section and the outer tube section are arranged through the axis to form a "circular tube", and the inner tube section and the outer tube section are installed in coordination through connecting ribs.

[0010] Preferably, the inner flow regulating cone and the outer flow regulating cone are cone valves or digital valves.

[0011] Preferably, the internal flow meter and the external flow meter are: a differential pressure flow meter, a turbine flow meter or a nozzle flow meter.

[0012] Preferably: the inner stop valve and the outer stop valve are used to realize independent opening and closing of the straight pipe and the curved pipe respectively, and flow tests of the inner and outer passages alone, alone, and both inner and outer passages at the same time can be carried out.

[0013] The present invention has the following beneficial effects:

[0014] The present invention provides a single / double-duct full-size intermediate casing aerodynamic performance tester, which provides a high-quality blowing test equipment for full-size single / double-duct intermediate casings, and provides necessary support for the research on the flow mechanism of intermediate casings. First, the flow rates of the inner and outer ducts of the device can be adjusted and measured separately, and a wide range of bypass ratios can be achieved. Secondly, the inner and outer ducts are respectively connected to flow meters, which have high flow regulation and measurement accuracy, that is, they can achieve high-precision bypass ratio and M number adjustment.

[0015] The present invention separates the inner and outer ducts of the double-duct full-size intermediate casing through the branch section of the volute principle, and after separation, they are respectively connected to large-size flow meters, which can control and measure flow with high precision. Different bypass ratios and incoming flow M numbers of the intermediate casing can be achieved through the coordinated adjustment of these two flow meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a specific implementation method of the present invention when conducting aerodynamic performance test of a double-filled full-size intermediate casing;

[0017] Figure 2 This is a schematic diagram of a double-ducted intermediate casing;

[0018] Figure 3 It is a schematic diagram of a specific implementation method of the present invention when conducting a large flow single-cultivation full-size intermediate casing aerodynamic performance test;

[0019] Figure 4It is a schematic diagram of a specific implementation method of the present invention when conducting aerodynamic performance test of a small flow single culvert full-size intermediate casing;

[0020] Figure 5 This is a schematic diagram of a single-duct intermediate casing;

[0021] Figure 6 It is a stereogram of the transition section;

[0022] Figure 7 It is a partial installation diagram of the transfer section and the branch section;

[0023] Figure 8 It is the structural composition of the intermediate casing;

[0024] In the figure, 1. inlet section, 2. single / double duct full-size intermediate casing, 3. measuring section, 4. transfer section, 5. branch section, 6. inner flow regulating cone, 7. outer duct flow regulating cone, 9. inner flow meter, 10. outer duct flow meter, 11. inner stop valve, 12. outer duct stop valve, 13. vacuum air source, 14. outer duct, 15. inner duct, 16. diverter ring, 17. double duct intermediate casing inlet, 18. single duct intermediate casing, 19. inner airflow, 20. outer duct airflow, 21. straight pipe, 22. elbow, 23. first elbow section, 24. second straight pipe section, 25 inner pipe section, 26. outer pipe section, 27. connecting ribs. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0027] Specific implementation method 1: Combination Figure 1-Figure 2The present embodiment is described. A single / double-containment full-size intermediate casing aerodynamic performance tester of the present embodiment comprises an inlet section 1, a single / double-containment full-size intermediate casing 2, a measuring section 3, a transfer section 4, a branch section 5, an inner flow regulating cone 6, an outer flow regulating cone 7, an inner flow meter 9, an outer flow meter 10, an inner stop valve 11, an outer stop valve 12 and a vacuum air source 13. The inlet section 1 is a bell-mouth-shaped inlet section. The single / double-containment full-size intermediate casing 2 is installed between the inlet section 1 and the measuring section 3. The branch section 5 is connected to the measuring section 3 through the transfer section 4. The branch pipe section 5 is installed vertically, and includes a straight pipe 21 and a curved pipe 22. The straight pipe 21 passes through the outer wall of the curved pipe 22 and is inserted into the inner side of the curved pipe 22. One end of the straight pipe 21 and the curved pipe 22 are installed with the transition section 4. The inner flow regulating cone 6, the inner flow meter 9 and the inner stop valve 11 are installed in sequence on the straight pipe 21. The outer flow regulating cone 7, the outer flow meter 10 and the outer stop valve 12 are installed in sequence on the curved pipe 22. One end of the straight pipe 21 and the curved pipe 22 are installed with the transition section 4, and the other end of the straight pipe 21 and the curved pipe 22 is connected to the vacuum air source 13.

[0028] The branch pipe section 5 separates the inner and outer culverts of the full-size intermediate casing 2 into two independent pipelines. The branch pipe section 5 first uses two straight pipes with different diameters to be coaxially connected. After a certain length, the inner small diameter pipeline (straight pipe 21) is further lengthened, and the end of the outer large diameter pipeline (bend pipe 22) is blocked and connected to the outer large diameter pipeline with a small diameter pipeline that is the same as the inner one. The outer culvert flow path can be independently led out to achieve separation from the inner pipeline. The inner small diameter pipeline is connected to the inner pipeline after being led out, and the outer large diameter pipeline is connected to the outer culvert pipeline after being led out.

[0029] The tester draws air into the inlet section 1 and the single / double-duct full-size intermediate casing through a vacuum air source 13, and then uses a branch section 5 designed on the volute principle to lead out the inner and outer duct airflows of the single / double-duct full-size intermediate casing respectively, and uses two large-size high-precision flow meters to control and measure the inner and outer duct flow rates, thereby achieving the single / double-duct full-size intermediate casing inlet M number and the required bypass ratio.

[0030] Specific implementation method 2: Combination Figure 1-Figure 2 The present embodiment is described. The present embodiment is a single / double-containment full-size intermediate casing aerodynamic performance tester. The branch pipe section 5 separates the inner and outer culverts of the single / double-containment full-size intermediate casing 2 into two independent pipelines. The straight pipe 21 and the curved pipe 22 of the branch pipe section 5 are coaxially sleeved. The branch pipe section adopts the volute principle design to lead out the inner and outer culvert airflows of the single / double-containment full-size intermediate casing respectively, and two large-size high-precision flowmeters are used to control and measure the inner and outer culvert flow rates, thereby realizing the single / double-containment full-size intermediate casing inlet M number and the required bypass ratio measurement test.

[0031] Specific implementation method three: Combination Figure 1-Figure 2The present embodiment is described. The present embodiment is a single / double culvert full-size intermediate casing aerodynamic performance tester. The curved pipe 22 includes a first curved pipe section 23 and a second straight pipe section 24. The straight pipe 21 passes through the outer wall of the first curved pipe section 23 and is inserted into the first curved pipe section 23. The first curved pipe section 23 is connected to the second straight pipe section 24 after the caliber is shrunk. The inner diameter of the second straight pipe section 24 is equal to the inner diameter of the straight pipe 21. The outer culvert flow regulating cone 7, the outer culvert flow meter 10 and the outer culvert stop valve 12 are sequentially installed on the second straight pipe section 24. In this way, the caliber of the first curved pipe section 23 after contraction is equal to the inner diameter of the straight pipe 21. In this way, in actual testing, it is ensured that the airflow entering the straight pipe 21 and the second straight pipe section 24 is consistent, which facilitates the adjustment of the inner flow and the outer flow by the inner flow regulating cone 6 and the outer culvert flow regulating cone 7. At the same time, since the airflow of the straight pipe 21 and the second straight pipe section 24 is consistent, the two are mutually referenced, which is convenient for later test data statistics and processing.

[0032] Specific implementation method four: Combination Figure 1-Figure 2 The present embodiment is described. The present embodiment is a single / double culvert full-size intermediate casing aerodynamic performance tester. The transition section 4 includes an inner pipe section 25 and an outer pipe section 26. The inner pipe section 25 and the outer pipe section 26 are arranged through the axis to form a "circular tube". The inner pipe section 25 and the outer pipe section 26 are installed in coordination through the connecting rib 27. In this arrangement, a flange structure is processed at the connection between the inner pipe section 25 and the outer pipe section 26. The straight pipe 21 and the curved pipe 22 are respectively connected and installed with the inner pipe section 25 and the outer pipe section 26 by flanges, so as to facilitate the separate extraction of the inner and outer culvert airflows of the single / double culvert full-size intermediate casing.

[0033] Combined with the specific implementations 1, 2, 3 and 4, the test process of the inner and outer contents of the intermediate casing is described:

[0034] 1. When conducting a double-containment full-size intermediate casing test, the double-containment full-size intermediate casing 2 is installed between the inlet section 1 and the measuring section 3. The inner and outer duct airflows flow through the transition section 4 and enter the branch section 5. The branch section 5 guides the inner duct airflow into the inner duct flow regulating cone 6 and enters the inner duct flow meter 9. The outer duct airflow is guided into the outer duct flow regulating cone 7 and enters the outer duct flow meter 10. The inner duct flow meter 9 is connected to the inner duct stop valve 11 via a pipeline. Similarly, the outer duct flow meter 10 is connected to the outer duct stop valve 12 via a suction pipeline. Finally, the inner and outer duct airflows enter the vacuum air source 13. During the test, the inner stop valve 11 and the outer stop valve 12 are all opened, the pressure ratio of the entire pipeline of the tester is formed, and the airflow begins to flow into the inlet section 1. After being rectified in the inlet section 1, it enters the double-containment full-size intermediate casing 2. The inner flow regulating cone 6 and the outer flow regulating cone 7 control the flow of the inner and outer culverts respectively. The inner flow meter 9 and the outer flow meter 10 measure the flow of the inner and outer culverts respectively. The inner flow regulating cone 6 and the outer flow regulating cone 7 are matched and adjusted with each other to achieve the required bypass ratio and the number of M in the intermediate casing inlet. Several measuring instruments such as total pressure rakes, probes and sensors are arranged at certain axial positions in the measuring section 3. These measuring instruments are connected to the high-precision acquisition module. After the flow field is stabilized, the instruments start to measure parameters. The double-containment full-size intermediate casing 2 and the measuring section 3 can be quickly disconnected to prepare for the flow display test and measurement and photography.

[0035] 2. When conducting a large-flow single-containment full-size intermediate casing test, the single-containment full-size intermediate casing 2 is installed between the inlet section 1 and the measuring section 3. The airflow flows through the transition section 4 and enters the branch section 5. The branch section 5 guides the airflow into the inner flow regulating cone 6 and the outer flow regulating cone 7. The inner flow regulating cone 6 enters the inner flow meter 9 through the pipeline, and the outer flow regulating cone 7 enters the outer flow meter 10 through the pipeline. The inner flow meter 9 is connected to the inner stop valve 11 via the pipeline. Similarly, the outer flow meter 10 is connected to the outer stop valve 12 via the suction pipeline. Finally, the two airflows enter the vacuum air source 13. During the test, the inner stop valve 11 and the outer stop valve 12 are all opened, the pressure ratio of the entire pipeline of the tester is formed, and the airflow begins to flow into the inlet section 1. After being rectified in the inlet section 1, it enters the single-culvert full-size intermediate casing 2. The inner flow regulating cone 6 and the outer flow regulating cone 7 respectively control the flow of their respective pipelines. The inner flow meter 9 and the outer flow meter 10 respectively measure the flow of their respective pipelines. The inner flow regulating cone 6 and the outer flow regulating cone 7 are matched and adjusted with each other to achieve the required number of M inlets of the intermediate casing. Several measuring instruments such as total pressure rakes, probes and sensors are arranged at certain axial positions in the measuring section 3. These measuring instruments are connected to the high-precision acquisition module. After the flow field is stabilized, the instruments begin to measure parameters. The double-culvert full-size intermediate casing 2 and the measuring section 3 can be quickly disconnected to prepare for measurement and photography for the flow display test.

[0036] 3. When conducting a small flow single culvert full-size intermediate casing test, the single culvert full-size intermediate casing 2 is installed between the inlet section 1 and the measuring section 3. The airflow flows through the transfer section 4 and enters the branch section 5. The branch section 5 guides all the airflow into the inner flow meter adjustment cone 6. The inner flow adjustment cone 6 enters the inner flow meter 9 through the pipeline. The inner flow meter 9 is connected to the inner stop valve 11 through the pipeline, and the airflow finally enters the vacuum air source 13. During the test, the inner stop valve 11 is fully opened, the outer stop valve 12 is fully closed, and the pressure ratio of the entire pipeline of the tester is formed. The airflow begins to flow into the inlet section 1, and enters the single culvert full-size intermediate casing 2 after rectification in the inlet section 1. The inner flow adjustment cone 6 and the inner flow meter respectively control and measure the incoming flow rate to achieve the single culvert intermediate casing inlet M number. In the measuring section 3, a number of measuring instruments such as total pressure rakes, probes and sensors are arranged at certain axial positions. These measuring instruments are connected to the high-precision acquisition module. After the flow field is stable, the instrument starts to measure parameters. The double-cultivated full-size intermediate casing 2 and the measuring section 3 can be quickly disconnected to carry out flow display tests and prepare for measurement and photography.

[0037] Specific implementation method five: Combination Figure 1-Figure 2 The present embodiment is described as a single / double-conduit full-size intermediate casing aerodynamic performance tester, wherein the inner flow regulating cone 6 and the outer flow regulating cone 7 are cone valves or digital valves; the inner flow meter 9 and the outer flow meter 10 are differential pressure flow meters, turbine flow meters or nozzle flow meters; the inner stop valve 11 and the outer stop valve 12 are respectively used to realize the independent opening and closing of the straight pipe 21 and the curved pipe 22, and flow tests of separate inner and outer conduits, separate outer conduits, and simultaneous inner and outer conduit passages can be performed.

[0038] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0039] This implementation is only an exemplary description of this patent and does not limit its protection scope. Those skilled in the art may also make partial changes to it, as long as they do not exceed the spirit of this patent, they are all within the protection scope of this patent.

Claims

1. A single / double-tube full-size intermediate casing aerodynamic performance tester, characterized by: The invention comprises an inlet section (1), a single / double-containment full-size intermediate casing (2), a measuring section (3), a transfer section (4), a branch section (5), an inner flow regulating cone (6), an outer flow regulating cone (7), an inner flow meter (9), an outer flow meter (10), an inner stop valve (11), an outer stop valve (12) and a vacuum air source (13). The single / double-containment full-size intermediate casing (2) is installed between the inlet section (1) and the measuring section (3). The branch section (5) is installed with the measuring section (3) through the transfer section (4). The branch section (5) comprises a straight pipe (21) and a curved pipe (22). The straight pipe (21) passes through the outer wall of the curved pipe (22) and is inserted into the inner side of the curved pipe (22); one end of the straight pipe (21) and the curved pipe (22) are installed with the transition section (4); an inner flow regulating cone (6), an inner flow meter (9) and an inner stop valve (11) are installed on the straight pipe (21) in sequence; an outer flow regulating cone (7), an outer flow meter (10) and an outer stop valve (12) are installed on the curved pipe (22) in sequence; one end of the straight pipe (21) and the curved pipe (22) are installed with the transition section (4); the other end of the straight pipe (21) and the curved pipe (22) are connected to a vacuum air source (13); The branch pipe section (5) separates the inner and outer culverts of the single / double culvert full-size intermediate casing (2) into two independent pipelines, and the straight pipe (21) and the curved pipe (22) of the branch pipe section (5) are coaxially sleeved; The curved pipe (22) comprises a first curved pipe section (23) and a second straight pipe section (24); the straight pipe (21) passes through the outer wall of the first curved pipe section (23) and is inserted into the first curved pipe section (23); the first curved pipe section (23) is connected to the second straight pipe section (24) after the diameter of the first curved pipe section (23) is reduced; the inner diameter of the second straight pipe section (24) is equal to the inner diameter of the straight pipe (21); and the outer culvert flow regulating cone (7), the outer culvert flow meter (10) and the outer culvert stop valve (12) are sequentially installed on the second straight pipe section (24).

2. A single / double-filled full-size intermediate casing aerodynamic performance tester according to claim 1, characterized in that: The transition section (4) comprises an inner tube section (25) and an outer tube section (26). The inner tube section (25) and the outer tube section (26) are coaxially arranged to form a "meandering tube". The inner tube section (25) and the outer tube section (26) are mounted in coordination via connecting ribs (27).

3. The single / double-filled full-size intermediate casing aerodynamic performance tester according to claim 1, characterized in that: The inner flow regulating cone (6) and the outer flow regulating cone (7) are cone valves or digital valves.

4. The single / double-filled full-size intermediate casing aerodynamic performance tester according to claim 1, characterized in that: The internal flow meter (9) and the external flow meter (10) are one of a differential pressure flow meter, a turbine flow meter or a nozzle flow meter.

5. The single / double-funnel full-size intermediate casing aerodynamic performance tester according to claim 1, characterized in that: The inner stop valve (11) and the outer stop valve (12) are used to realize the independent opening and closing of the straight pipe (21) and the curved pipe (22) respectively.

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