An adaptive variable cycle engine exhaust structure

Abstract

The present application belongs to the field of exhaust structure design of adaptive variable cycle engine, and specifically relates to an exhaust structure of adaptive variable cycle engine, including: an outer diverter tube; an inner diverter tube, which is arranged in the outer diverter tube, and forms a third ducted exhaust diverter channel between the inner diverter tube and the outer diverter tube, and the inner and outer ducted exhaust diverter channels are formed therein; the inlet of the third ducted exhaust diverter channel is connected to the outlet of the third duct of the adaptive variable cycle engine; the inlet of the inner and outer ducted exhaust diverter channels are connected to the outlets of the inner and outer ducts of the adaptive variable cycle engine; a nozzle, whose inlet is connected to the outlets of the inner and outer ducted exhaust diverter channels, and has openings on the fixed side walls on both sides of its expansion section; two third ducted exhaust guide channels, the inlet of each third ducted exhaust guide channel is connected to the outlet of the third ducted exhaust diverter channel, and the outlet is correspondingly connected to an opening.

Description

Technical Field

[0001] The present application belongs to the field of adaptive variable cycle engine exhaust structure design, and specifically relates to an adaptive variable cycle engine exhaust structure. Background Art

[0002] Aircraft engines exhaust gas through nozzles, generating thrust to propel the aircraft into flight.

[0003] Compared with the inner and outer ducts of conventional aircraft engines, the adaptive variable cycle engine has a third duct located outside the outer duct.

[0004] Currently, the exhaust structure of the adaptive variable cycle engine is complex, inconvenient to operate, and has poor stealth performance.

[0005] This application is proposed in view of the above-mentioned technical defects.

[0006] 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 this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of this application. Summary of the Invention

[0007] The purpose of this application is to provide an adaptive variable cycle engine exhaust structure to overcome or alleviate at least one of the known technical deficiencies.

[0008] The technical solution of this application is:

[0009] An adaptive variable cycle engine exhaust structure, comprising:

[0010] Outer diverter tube;

[0011] The inner diverter tube is arranged inside the outer diverter tube, and forms a third ducted exhaust diverter channel between the inner diverter tube and the outer diverter tube, wherein the inner diverter channel constitutes an inner and outer ducted exhaust diverter channel; the inlet of the third ducted exhaust diverter channel is connected to the outlet of the third duct of the adaptive variable cycle engine; the inlet of the inner and outer ducted exhaust diverter channel is connected to the outlet of the inner and outer ducts of the adaptive variable cycle engine;

[0012] The nozzle has an inlet connected to the outlet of the inner and outer duct exhaust diversion channel, and has openings on the fixed side walls on both sides of the expansion section;

[0013] Two third ducted exhaust flow guiding channels, the inlet of each third ducted exhaust flow guiding channel is connected to the outlet of the third ducted exhaust diversion channel, and the outlet is correspondingly connected to an opening.

[0014] According to at least one embodiment of the present application, in the above-mentioned adaptive variable cycle engine exhaust structure, the outlet portions of the outer splitter tube and the inner splitter tube form two arc-shaped outlets, and the two arc-shaped outlets are distributed on both sides of the nozzle;

[0015] The inlet of each third ducted exhaust guide channel is correspondingly connected to an arc-shaped outlet;

[0016] The two third duct exhaust guide channels are plate-shaped structures and are attached to the corresponding sides of the nozzle.

[0017] According to at least one embodiment of the present application, in the above-mentioned adaptive variable cycle engine exhaust structure, the two third ducted exhaust guide channels have a contraction section near the outlet portion, and the radial dimension within the contraction section gradually contracts.

[0018] According to at least one embodiment of the present application, in the above-mentioned adaptive variable cycle engine exhaust structure, the distance between the two openings and the inlet of the expansion section is 0.2-0.3 times the length of the expansion section.

[0019] According to at least one embodiment of the present application, in the above-mentioned adaptive variable cycle engine exhaust structure, the nozzle is a binary vector nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the exhaust structure of an adaptive variable cycle engine provided by an embodiment of the present application;

[0021] Figure 2 Schematic diagram of an outer diverter tube and an inner diverter tube provided in an embodiment of the present application;

[0022] Figure 3 Schematic diagram of the third ducted exhaust guide channel provided in an embodiment of the present application;

[0023] in:

[0024] 1-outer manifold; 2-inner manifold; 3-nozzle; 4-third duct exhaust guide channel.

[0025] 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 limitations on this patent. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The following is combined with Figures 1 to 3 This application is described in further detail.

[0030] An adaptive variable cycle engine exhaust structure, comprising:

[0031] Outer diversion tube 1;

[0032] The inner diverter tube 2 is arranged inside the outer diverter tube 1, and forms a third ducted exhaust diverter channel between the inner diverter tube 1 and the outer diverter tube 1, wherein the inner diverter channel constitutes an inner and outer ducted exhaust diverter channel; the inlet of the third ducted exhaust diverter channel is connected to the outlet of the third duct of the adaptive variable cycle engine; the inlet of the inner and outer ducted exhaust diverter channel is connected to the outlet of the inner and outer ducts of the adaptive variable cycle engine;

[0033] The nozzle 3 has an inlet connected to the outlet of the inner and outer duct exhaust diversion channel, and has openings on the fixed side walls on both sides of the expansion section;

[0034] There are two third ducted exhaust guiding channels 4 , and the inlet of each third ducted exhaust guiding channel 4 is connected to the outlet of the third ducted exhaust diversion channel, and the outlet is correspondingly connected to an opening.

[0035] As for the adaptive variable cycle engine exhaust structure disclosed in the above embodiment, it can be understood by those skilled in the art that its design uses the outer diverter tube 1 and the inner diverter tube 2 to construct a third duct exhaust diverter channel and an inner and outer duct exhaust diverter channel, and the exhaust of the third duct, outer duct and inner duct of the adaptive variable cycle engine is introduced into the nozzle 3 and ejected from the nozzle 3 to generate thrust. The overall structure is simple and easy to operate, and the exhaust of the third duct is mixed with the exhaust of the outer duct and inner duct in the nozzle 3, which can reduce the temperature of the exhaust of the nozzle 3 and help improve the stealth of the nozzle 3.

[0036] Regarding the adaptive variable cycle engine exhaust structure disclosed in the above embodiment, those skilled in the art can also understand that its design uses two third duct exhaust guide channels 4 to introduce the exhaust of the third duct of the adaptive variable cycle engine into the expansion section of the nozzle 3. The exhaust pressures of the outer duct and the inner duct at the expansion section of the nozzle 3 are relatively low, which can ensure that the exhaust of the third duct can be smoothly introduced.

[0037] Regarding the adaptive variable cycle engine exhaust structure disclosed in the above embodiment, technicians in the field can also understand that its design leads the exhaust of the third duct of the adaptive variable cycle engine to the nozzle 3 in two ways, which is conducive to the rapid mixing of the exhaust of the third duct with the exhaust of the outer duct and the inner duct in the nozzle 3.

[0038] In some optional embodiments, in the above-mentioned adaptive variable cycle engine exhaust structure, the outlet portions of the outer splitter tube 1 and the inner splitter tube 2 form two arc-shaped outlets, and the two arc-shaped outlets are distributed on both sides of the nozzle 3;

[0039] The inlet of each third ducted exhaust guide channel 4 is correspondingly connected to an arc-shaped outlet;

[0040] The two third ducted exhaust guide channels 4 are plate-shaped structures and are attached to corresponding sides of the nozzle 3 .

[0041] As for the adaptive variable cycle engine exhaust structure disclosed in the above embodiment, those skilled in the art can understand that the two third ducted exhaust guide channels 4 are designed as rigid structures, which are fixedly connected between the outlet of the third ducted exhaust diversion channel constructed by the outer diversion tube 1 and the inner diversion tube 2 and the openings on the fixed side walls on both sides of the expansion section of the nozzle 3. The structure is stable and is attached to the corresponding side of the nozzle 3, with a compact structure.

[0042] In some optional embodiments, in the above-mentioned adaptive variable cycle engine exhaust structure, the two third duct exhaust guide channels 4 have a contraction section near the outlet, and the radial dimension within the contraction section gradually shrinks. The exhaust of the third duct of the adaptive variable cycle engine can form a jet at this location and can be smoothly introduced into the expansion section of the nozzle 3.

[0043] In some optional embodiments, in the above-mentioned adaptive variable cycle engine exhaust structure, the two openings are located at a distance of 0.2-0.3 times the length of the expansion section from the inlet of the expansion section, that is, they are located at the front end of the expansion section of the nozzle 3, so as to ensure that the exhaust introduced into the third duct of the adaptive variable cycle engine can have sufficient travel to mix with the exhaust of the inner and outer ducts and the inner duct of the nozzle 3, and can be evenly mixed when reaching the outlet of the nozzle 3, thereby ensuring the stealth performance of the nozzle 3.

[0044] In some optional embodiments, in the above-mentioned adaptive variable cycle engine exhaust structure, the nozzle 3 is a binary vector nozzle. Its specific structural form can be designed and selected by relevant technical personnel according to specific actual conditions when applying the technical solution disclosed in this application, and no further explanation will be given here.

[0045] 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.

[0046] 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. An adaptive variable cycle engine exhaust structure, characterized in that: include: Outer diversion tube (1); An inner diverter tube (2) is arranged inside the outer diverter tube (1) and forms a third ducted exhaust diverter channel with the outer diverter tube (1), wherein inner and outer ducted exhaust diverter channels are formed; The inlet of the third ducted exhaust diversion channel is connected to the outlet of the third duct of the adaptive variable cycle engine; The inlet of the inner and outer duct exhaust diversion channel is connected to the outlet of the inner duct and the outer duct of the adaptive variable cycle engine; A nozzle (3), the inlet of which is connected to the outlet of the inner and outer duct exhaust diversion channel, and the fixed side walls on both sides of the expansion section of the nozzle (3) are provided with openings; Two third ducted exhaust flow guiding channels (4), the inlet of each of the third ducted exhaust flow guiding channels (4) being connected to the outlet of the third ducted exhaust flow diversion channel, and the outlet being connected to one of the openings; The outlet portions of the outer diversion tube (1) and the inner diversion tube (2) form two arc-shaped outlets, and the two arc-shaped outlets are distributed on both sides of the nozzle (3); The inlet of each of the third ducted exhaust guide channels (4) is correspondingly connected to one of the arc-shaped outlets; The two third ducted exhaust guide channels (4) are plate-shaped structures and are attached to corresponding sides of the nozzle (3).

2. The adaptive variable cycle engine exhaust structure according to claim 1, characterized in that: The two third ducted exhaust guide channels (4) have contraction sections near the outlets, and the radial dimensions within the contraction sections gradually contract.

3. The adaptive variable cycle engine exhaust structure according to claim 1, characterized in that: The distance between the two openings and the inlet of the expansion section is 0.2-0.3 times the length of the expansion section.

4. The adaptive variable cycle engine exhaust structure according to claim 1, characterized in that: The nozzle (3) is a binary vector nozzle.

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