A device for simulating and measuring the inlet flow field of an engine three-duct afterburner test chamber

Abstract

The present application specifically relates to a simulation and measurement device for the test inlet flow field of an engine three-duct afterburner. In specific applications, the rear section of the outer casing, the rear section of the inner casing, and the rear end of the inner cone can be connected to the afterburner test piece, and inner air can be introduced into the inner duct of the afterburner through the inner air inlet duct, and outer air can be introduced into the afterburner through the outer air inlet duct, and three-duct air can be introduced into the three ducts through the three-duct air inlet holes. In this way, the inlet flow field of the afterburner can be simulated, and the temperature, pressure and other measuring points arranged on the inner air inlet flow field measurement struts and the inner and outer air inlet flow field measurement struts can be used to measure the temperature and pressure of the inner air inlet and the outer air inlet.

Description

Technical Field

[0001] The present application belongs to the technical field of three-duct afterburner test of aircraft engines, and specifically relates to a simulation and measurement device for the inlet flow field of a three-duct afterburner test of an engine. Background Art

[0002] The afterburner test of an aircraft engine uses an inlet flow field simulation and measurement device to simulate the inlet flow field of the afterburner and measure the inlet flow field parameters.

[0003] At present, the angle of the straightening vane in the aircraft engine afterburner test inlet flow field simulation and measurement device is fixed, and it can only simulate the inlet flow field of a specific swirl angle. When it is necessary to simulate the inlet flow field of different swirl angles, it is necessary to manufacture, process and replace the inlet flow field simulation and measurement device with the straightening vane of the corresponding angle, which is time-consuming, labor-intensive and a waste of resources. In addition, the current aircraft engine afterburner test inlet flow field simulation and measurement device can only simulate the double-duct inlet flow field of the afterburner, and cannot simulate the three-duct inlet flow field of the afterburner, and cannot withstand higher temperature loads.

[0004] This application is proposed in view of the above-mentioned technical defects.

[0005] It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of the present application. In the absence of clear evidence that the above content has been disclosed on the filing date of the present application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the Invention

[0006] The purpose of this application is to provide a three-duct afterburner test inlet flow field simulation measurement device for an engine to overcome or alleviate at least one of the known technical defects.

[0007] The technical solution of this application is:

[0008] An engine three-duct afterburner test inlet flow field simulation measurement device, comprising:

[0009] Front section of outer receiver;

[0010] The inner receiver front section is arranged inside the outer receiver front section, and its rear end surface has an annular slot;

[0011] An inner cone is provided in the front section of the inner receiver;

[0012] The middle section of the inner casing is sleeved on the outer periphery of the inner cone, and its front end is inserted into the annular slot;

[0013] The middle section of the outer receiver is sleeved on the outer periphery of the middle section of the inner receiver, and its front end is connected to the front section of the outer receiver by bolts through a connecting edge, and an annular positioning groove is provided on the inner side of the rear end;

[0014] A plurality of outer duct support plates are circumferentially supported between the inner casing midsection and the outer casing midsection, are welded to the inner casing midsection, and are bolted to the outer casing midsection via connecting edges.

[0015] The inner ring of the rectifier blade is sleeved on the outer periphery of the inner cone and abuts against the outer wall of the inner cone. The outer ring slides into the annular positioning groove, and an annular gap is formed between the rear end of the outer ring and the annular positioning groove.

[0016] The rear section of the inner casing is sleeved on the outer periphery of the inner cone, and its front end is inserted into the annular gap, forming the inner casing together with the middle section of the inner casing and the front section of the inner casing; an internal air intake duct is formed between the inner casing and the inner cone;

[0017] The rear section of the outer receiver is sleeved on the outer periphery of the rear section of the inner receiver, and the front end thereof is connected to the middle section of the outer receiver by bolts through a connecting edge, and together with the middle section of the outer receiver and the front section of the outer receiver, an outer receiver is formed; an outer air intake duct is formed between the outer receiver and the inner receiver;

[0018] Multiple internal intake air flow field measurement struts are circumferentially connected to the front section of the outer casing through a mounting base using bolts, are set through the front section of the outer casing and the front section of the inner casing, and extend into the internal intake duct. Temperature and pressure measurement points are set on the windward surface of the internal intake duct.

[0019] Multiple inner and outer duct intake airflow field measurement struts are circumferentially connected to the outer casing rear section via mounting bases using bolts, are set through the outer casing rear section and the inner casing rear section, pass through the outer duct intake duct and extend into the inner duct intake duct, and temperature and pressure measurement points are set on the windward surfaces of the outer duct intake duct and the inner duct intake duct;

[0020] The three-ducted air intake casing is mounted on the rear end of the outer casing rear section, and its front end is tilted downward and connected to the outer wall of the outer casing rear section, forming a three-ducted air intake duct between the outer casing rear section, and has multiple three-ducted air intake holes distributed along the circumferential direction on its front end side wall.

[0021] According to at least one embodiment of the present application, in the above-mentioned engine three-duct afterburner test inlet flow field simulation measurement device, the inner cone is a hollow structure, and a plurality of support rings are provided on the inner side of its inner wall.

[0022] According to at least one embodiment of the present application, in the aforementioned engine three-duct afterburner test inlet flow field simulation measurement device, the inner cone is a sandwich structure, having a plurality of inner wall mounting holes distributed circumferentially on its inner wall, a vent hole at the front end of the inner wall, a plurality of outer wall mounting holes distributed circumferentially on its outer wall, and a plurality of air film holes;

[0023] The engine three-duct afterburner test inlet flow field simulation measurement device also includes:

[0024] Multiple cold air intake pipes are arranged through the front section of the outer casing and the front section of the inner casing, and their outlet ends pass through the respective outer wall mounting holes and extend into the inner cone interlayer;

[0025] Multiple sleeves, one end of which passes through each inner wall mounting hole and is sleeved onto the outlet end of the cold air inlet pipe, resting against the outer wall of the inner cone, the inner side of this end is welded to the outer wall of the outlet end of the cold air inlet pipe and the outer wall of the inner cone, and the outer wall of the other end is welded to the inner wall of the inner cone; the outlet end of each cold air inlet pipe is welded to the inner side of the sleeve.

[0026] According to at least one embodiment of the present application, in the above-mentioned engine three-duct afterburner test inlet flow field simulation measurement device, the outer wall of the inner cone has a plurality of positioning holes distributed along the circumferential direction;

[0027] The engine three-duct afterburner test inlet flow field simulation measurement device also includes:

[0028] A plurality of positioning blocks are welded on the inner wall of the inner cone along the circumferential direction and have positioning grooves thereon;

[0029] A plurality of positioning bosses are provided in each positioning hole and inserted into each positioning groove;

[0030] The baffle is connected to the outer wall and the rear end of the inner wall of the inner cone.

[0031] This application has at least the following beneficial technical effects:

[0032] The engine three-duct afterburner test inlet flow field simulation and measurement device disclosed in the above embodiment can, in specific applications, connect the outer casing rear section, the inner casing rear section, and the rear end of the inner cone to the afterburner test piece, and introduce inner air into the inner duct of the afterburner through the inner air inlet duct, introduce outer air into the afterburner through the outer air inlet duct, and introduce three-duct air into the three ducts through the three-duct air inlet holes. In this way, the afterburner inlet flow field can be simulated, and the temperature, pressure and other measuring points arranged on the inner intake flow field measurement struts and the inner and outer intake flow field measurement struts can be used to measure the temperature and pressure of the inner intake duct and the outer intake duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the test inlet flow field simulation measurement device for a three-duct afterburner combustion chamber of an engine provided in an embodiment of the present application;

[0034] Figure 2 yes Figure 1 AA sectional view;

[0035] Figure 3 This is a partial schematic diagram of the engine three-duct afterburner test inlet flow field simulation measurement device provided by an embodiment of the present application;

[0036] in:

[0037] 1-front section of outer casing; 2-front section of inner casing; 3-inner cone; 4-middle section of inner casing; 5-middle section of outer casing; 6-rectifier blades; 7-rear section of inner casing; 8-rear section of outer casing; 9-inner intake air flow field measurement support rod; 10-inner and outer duct intake air flow field measurement support rod; 11-three-duct intake casing; 12-outer duct intake support plate; 13-cold air intake pipe; 14-sleeve; 15-positioning block; 16-positioning boss; 17-baffle.

[0038] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be understood as limiting this application. DETAILED DESCRIPTION

[0039] To make the technical solution and its advantages of the present application clearer, the technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present application and are only used to explain the present application, not to limit the present application. It should be noted that, for ease of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0040] In addition, unless otherwise defined, the technical or scientific terms used in the description of this application should have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The words "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer" used in the description of this application are only used to indicate relative directions or positional relationships, and do not imply that the device or component must have a specific orientation, be constructed, or operate in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. Therefore, they should not be understood as limitations on this application. The words "first," "second," "third," and similar terms used in the description of this application are used only for descriptive purposes to distinguish different components and should not be understood to indicate or imply relative importance. The words "one," "an," or "the" used in the description of this application should not be understood as absolute limitations on quantity, but should be understood as meaning the presence of at least one. The words "include" or "comprises" used in the description of this application mean that the element or object listed before the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0041] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the words "install", "connect", "connect" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0042] The following is combined with Figures 1 to 3 This application is described in further detail.

[0043] A device for simulating and measuring the inlet flow field of a three-duct afterburner test chamber of an engine, such as Figure 1 As shown, including:

[0044] Front section of outer receiver 1;

[0045] The inner casing front section 2 is arranged in the outer casing front section 1, and has an annular slot on its rear end surface;

[0046] An inner cone 3 is provided in the inner casing front section 2;

[0047] The middle section 4 of the inner casing is sleeved on the outer periphery of the inner cone 3, and its front end is inserted into the annular slot;

[0048] The outer casing middle section 5 is sleeved on the outer periphery of the inner casing middle section 4, and its front end is connected to the outer casing front section 1 by bolts through a connecting edge, and an annular positioning groove is provided on the inner side of the rear end;

[0049] A plurality of outer duct support plates 12 are supported circumferentially between the inner casing midsection 4 and the outer casing midsection 5, are welded to the inner casing midsection 4, and are connected to the outer casing midsection 5 by bolts 1 through the connecting edges;

[0050] The inner ring of the rectifier blade 6 is sleeved on the outer periphery of the inner cone 3 and abuts against the outer wall of the inner cone 3. The outer ring slides into the annular positioning groove, and an annular gap is formed between the rear end of the outer ring and the annular positioning groove.

[0051] The inner casing rear section 7 is sleeved on the outer periphery of the inner cone 3, with its front end inserted into the annular gap, forming the inner casing together with the inner casing middle section 4 and the inner casing front section 2; an internal air intake duct is formed between the inner casing and the inner cone 3;

[0052] The outer casing rear section 8 is sleeved on the outer periphery of the inner casing rear section 7, and its front end is connected to the outer casing middle section 4 by bolts through the connecting edge, and together with the outer casing middle section 5 and the outer casing front section 1, an outer casing is formed; an outer air intake duct is formed between the outer casing and the inner casing;

[0053] Multiple internal intake air flow field measurement struts 9 are circumferentially connected to the outer casing front section 1 through a mounting base using bolts, penetrate the outer casing front section 1 and the inner casing front section 2, and extend into the internal intake duct. Temperature and pressure measurement points are set on the windward surface of the internal intake duct, and airflow angle measurement points can also be set;

[0054] Multiple inner and outer duct intake airflow field measurement struts 10 are circumferentially connected to the outer casing rear section 8 by bolts through a mounting seat, are arranged through the outer casing rear section 8 and the inner casing rear section 7, pass through the outer duct intake duct and extend into the inner duct intake duct, and temperature and pressure measurement points are set on the windward surfaces of the outer duct intake duct and the inner duct intake duct, and airflow angle measurement points can also be set;

[0055] The three-duct air intake casing 11 is mounted on the rear end of the outer casing rear section 8, and its front end is tilted downward and connected to the outer wall of the outer casing rear section 8, forming a three-duct air intake duct between the outer casing rear section 8, and has a plurality of three-duct air intake holes distributed along the circumferential direction on its front end side wall.

[0056] The engine three-duct afterburner test inlet flow field simulation and measurement device disclosed in the above embodiment can, in specific applications, connect the outer casing rear section 8, the inner casing rear section 7, and the rear end of the inner cone 3 to the afterburner test piece, and introduce inner air into the inner duct of the afterburner through the inner air inlet duct, introduce outer air into the afterburner through the outer air inlet duct, and introduce three-duct air into the three ducts through the three-duct air inlet holes. In this way, the inlet flow field of the afterburner can be simulated, and the temperature, pressure and other measuring points arranged on the inner air inlet flow field measurement support rod 9 and the inner and outer air inlet flow field measurement support rod 10 can be used to measure the temperature and pressure of the inner air inlet and the outer air inlet.

[0057] In the engine three-duct afterburner test inlet flow field simulation measurement device disclosed in the above embodiment, an inner casing is designed to be composed of a detachably connected inner casing front section 2, an inner casing middle section 4, and an inner casing rear section 7, which form an inner air inlet duct between the inner casing and the inner cone 3, and an outer casing is designed to be composed of a detachably connected outer casing front section 1, an outer casing middle section 5, and an outer casing rear section 8, which form an outer air inlet duct between the inner casing, and a straightening vane 6 is detachably connected therebetween. The straightening vane 6 of the corresponding angle can be replaced according to the test needs to simulate the afterburner inlet flow field with different swirl angles without replacing the entire device.

[0058] In the engine three-duct afterburner test inlet flow field simulation measurement device disclosed in the above embodiment, a three-duct air intake casing 11 is designed to be mounted on the rear end of the outer casing rear section 8, and the front end of the three-duct air intake casing 11 is designed to be tilted downward and connected to the outer wall of the outer casing rear section 8, thereby forming a three-duct air intake duct between the outer casing rear section 8, and the three-duct air intake holes on the three-duct air intake casing 11 are located on the front end side wall thereof, and three-duct air is introduced into the three-duct air intake duct through the three-duct air intake holes. Under the effect of the tilt of the front end of the three-duct air intake casing 11, when it flows backward and enters the three-duct of the afterburner test piece, expansion pressure will occur, so that uniform distribution can be achieved within a short distance, which well simulates the afterburner inlet flow field, and the overall structure is simple and compact.

[0059] In some optional embodiments, in the above-mentioned engine three-duct afterburner test inlet flow field simulation measurement device, the inner cone 3 is a hollow structure, and a plurality of support rings are provided on the inner side of its inner wall.

[0060] In some optional embodiments, in the above-mentioned engine three-duct afterburner test inlet flow field simulation measurement device, the inner cone 3 is a sandwich structure, and has a plurality of inner wall mounting holes distributed along the circumferential direction on its inner wall, a vent hole at the front end of the inner wall, and a plurality of outer wall mounting holes distributed along the circumferential direction on its outer wall, as well as a plurality of air film holes;

[0061] The engine three-duct afterburner test inlet flow field simulation measurement device also includes:

[0062] Multiple cold air inlet pipes 13 are provided through the outer casing front section 1 and the inner casing front section 2, and their outlet ends pass through the respective outer wall mounting holes and extend into the interlayer of the inner cone 3;

[0063] Multiple sleeves 14, one end of which passes through each inner wall mounting hole and is connected to the outlet end of the cold air inlet pipe 13, resting on the outer wall of the inner cone 3, and the inner side of this end is welded to the outer wall of the outlet end of the cold air inlet pipe 13 and the outer wall of the inner cone 3, and the outer wall of the other end is welded to the inner wall of the inner cone 3; the outlet end of each cold air inlet pipe 13 is welded to the inner side of the sleeve 14, such as Figure 3 As shown, the connection between structures is reliable and easy to assemble.

[0064] The engine three-duct afterburner test inlet flow field simulation and measurement device disclosed in the above embodiment can, in specific applications, introduce cold air into the cavity of the inner cone 3 through the cold air inlet pipe 13, further enter the interlayer of the inner cone 3 through the air vents at the front end of the inner wall of the inner cone 3, and be discharged through the air film holes on the outer wall of the inner cone 3, thereby protecting the inner cone 3 from erosion by high-temperature internal air. It uses the cavity of the inner cone 3 for pressure expansion to make the cooling of the inner cone 3 uniform in the circumferential direction.

[0065] In some optional embodiments, in the above-mentioned engine three-duct afterburner test inlet flow field simulation measurement device, the outer wall of the inner cone 3 has a plurality of positioning holes distributed along the circumferential direction;

[0066] The engine three-duct afterburner test inlet flow field simulation measurement device also includes:

[0067] A plurality of positioning blocks 15 are welded to the inner wall of the inner cone 3 along the circumferential direction and have positioning grooves thereon;

[0068] A plurality of positioning bosses 16 are provided in each positioning hole and inserted into each positioning groove;

[0069] The baffle 17 is connected to the outer wall and the rear end of the inner wall of the inner cone 3 to facilitate assembly and ensure the stability of the overall structure.

[0070] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to in detail.

[0071] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the scope of protection of the present application.

Claims

1. A three-duct afterburner test inlet flow field simulation measurement device for an engine, characterized in that: include: Front section of outer receiver (1); The inner casing front section (2) is arranged in the outer casing front section (1), and its rear end surface has an annular slot; An inner cone (3) is provided in the front section of the inner casing (2); The middle section of the inner casing (4) is sleeved on the outer periphery of the inner cone (3), and its front end is inserted into the annular slot; The outer casing middle section (5) is sleeved on the outer periphery of the inner casing middle section (4), and its front end is connected to the outer casing front section (1) by bolts through a connecting edge, and an annular positioning groove is provided on the inner side of the rear end; A plurality of outer duct support plates (12) are supported circumferentially between the inner casing middle section (4) and the outer casing middle section (5), are welded to the inner casing middle section (4), and are connected to the outer casing middle section (5) by bolts (1). The outer casing middle section (5) is connected by bolts through the connecting edges. The rectifier blade (6) has an inner ring sleeved on the outer periphery of the inner cone (3) and abutted against the outer wall of the inner cone (3), and the outer ring slides into the annular positioning groove, with an annular gap formed between the rear end of the outer ring and the annular positioning groove; The inner casing rear section (7) is sleeved on the outer periphery of the inner cone (3), and its front end is inserted into the annular gap, forming the inner casing together with the inner casing middle section (4) and the inner casing front section (2); an internal air intake duct is formed between the inner casing and the inner cone (3); The outer casing rear section (8) is sleeved on the outer periphery of the inner casing rear section (7), and the front end thereof is connected to the outer casing middle section (4) by bolts through a connecting edge, and forms an outer casing with the outer casing middle section (5) and the outer casing front section (1); an outer air intake duct is formed between the outer casing and the inner casing; A plurality of internal intake air flow field measurement struts (9) are connected to the outer casing front section (1) along the circumferential direction by bolts through a mounting seat, penetrate the outer casing front section (1) and the inner casing front section (2), extend into the internal intake duct, and extend into a portion of the internal intake duct on the windward surface to set temperature and pressure measurement points; A plurality of inner and outer duct intake air flow field measurement struts (10) are connected to the outer casing rear section (8) along the circumferential direction by bolts through a mounting seat, are arranged through the outer casing rear section (8) and the inner casing rear section (7), pass through the outer duct intake duct and extend into the inner duct intake duct, and temperature and pressure measurement points are arranged on the windward surfaces of the outer duct intake duct and the inner duct intake duct; A three-ducted air intake casing (11) is sleeved on the rear end of the outer casing rear section (8), and its front end is tilted downward and connected to the outer wall of the outer casing rear section (8), forming a three-ducted air intake duct between the outer casing rear section (8), and a plurality of three-ducted air intake holes distributed along the circumferential direction are provided on the front end side wall; The inner cone (3) is a sandwich structure, with a plurality of inner wall mounting holes distributed along the circumferential direction on its inner wall, a vent hole at the front end of the inner wall, a plurality of outer wall mounting holes distributed along the circumferential direction on its outer wall, and a plurality of air film holes; A plurality of cold air inlet pipes (13) are provided through the outer casing front section (1) and the inner casing front section (2), and the outlet ends thereof pass through the respective outer wall mounting holes and extend into the interlayer of the inner cone (3).

2. The engine three-duct afterburner test inlet flow field simulation measurement device according to claim 1, characterized in that: The inner cone (3) is a hollow structure.

3. The engine three-duct afterburner test inlet flow field simulation measurement device according to claim 2, characterized in that: Also includes: A plurality of sleeves (14) are provided, one end of which is inserted through each inner wall mounting hole and sleeved onto the outlet end of the cold air inlet pipe (13), and abuts against the outer wall of the inner cone (3); the inner side of the end is welded to the outer wall of the outlet end of the cold air inlet pipe (13) and the outer wall of the inner cone (3); and the outer wall of the other end is welded to the inner wall of the inner cone (3); the outlet end of each cold air inlet pipe (13) is welded to the inner side of the sleeve (14).

4. The engine three-duct afterburner test inlet flow field simulation measurement device according to claim 3, characterized in that: The outer wall of the inner cone (3) is provided with a plurality of positioning holes distributed along the circumferential direction; The engine three-duct afterburner test inlet flow field simulation measurement device also includes: A plurality of positioning blocks (15) are welded to the inner wall of the inner cone (3) along the circumferential direction and have positioning grooves thereon; A plurality of positioning bosses (16) are provided in each positioning hole and inserted into each positioning groove; The baffle (17) is connected to the outer wall and the rear end of the inner wall of the inner cone (3).

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