An integrated assembly of an air-cooled inner cone and a strut diffuser fuel injector stabilizer

Abstract

The application relates to the field of aviation technology and provides an integrated assembly of an air-bleed cooling inner cone and a support plate diffuser and oil injection stabilizer, which is applied to a booster combustion chamber and comprises a diffuser, a support plate and an inner cone arranged in the booster combustion chamber, the diffuser is arranged on the top surface of the support plate and forms a first flow channel with the top surface of the booster combustion chamber; the inner cone is arranged on the bottom surface of the support plate and forms a second flow channel with the bottom surface of the diffuser; the first flow channel and the second flow channel are respectively communicated with the inlet of the booster combustion chamber; the diffuser, the support plate and the inner cone are integrally formed.The application not only improves the compactness and strength of the structure, but also reduces the interference and airflow separation phenomenon among the components, reduces the flow loss in the booster combustion chamber, and improves the performance and reliability of the overall engine.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aviation technology, and in particular to an integrated assembly of an air-cooled inner cone and a strut-plate diffuser with an oil injection stabilizer. BACKGROUND

[0002] A jet engine is an important component of a modern aircraft power system, and the afterburner plays a key role in providing additional thrust. Existing jet engine afterburners generally use a flame stabilizer, a diffuser, and an oil injection rod as separate components. However, the separate placement of these components increases the flow loss within the afterburner, thereby affecting the overall performance and efficiency of the engine. SUMMARY

[0003] The present application provides an integrated assembly of an air-cooled inner cone and a strut-plate diffuser with an oil injection stabilizer to solve the problem of flow loss in the afterburner, which affects the overall performance and efficiency of the engine.

[0004] The present application provides an integrated assembly of an air-cooled inner cone and a strut-plate diffuser with an oil injection stabilizer, which is applied to an afterburner, comprising: a diffuser, a strut plate, and an inner cone arranged in the afterburner, the diffuser is arranged on the top surface of the strut plate and forms a first flow channel with the top surface of the afterburner; the inner cone is arranged on the bottom surface of the strut plate and forms a second flow channel with the bottom surface of the diffuser; the first flow channel and the second flow channel are respectively in communication with the inlet of the afterburner; the diffuser, the strut plate, and the inner cone are integrally formed.

[0005] According to the integrated assembly of an air-cooled inner cone and a strut-plate diffuser with an oil injection stabilizer provided by the present application, the strut plate is provided with a cooling channel, the inner cone is provided with a cooling port, the strut plate is provided with an air outlet, the cooling port and the air outlet are respectively in communication with the cooling channel, and the cooling port is used to communicate with the outlet of a cooling device.

[0006] According to the integrated assembly of an air-cooled inner cone and a strut-plate diffuser with an oil injection stabilizer provided by the present application, the diffuser is provided with an oil inlet, and the side wall of the strut plate is provided with an oil injection port, the oil inlet is in communication with the oil injection port.

[0007] According to the integrated assembly of an air-cooled inner cone and a strut-plate diffuser with an oil injection stabilizer provided by the present application, the side wall of the strut plate is provided with a first groove, the first groove is arranged along the height direction of the strut plate, the axis of the first groove is perpendicular to the axis of the inlet of the afterburner, and the oil injection port is arranged on the side wall of the first groove.

[0008] According to the integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application, the top surface of the inner cone is provided with a second groove, and the first groove and the second groove are communicated.

[0009] According to the integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application, the mixer is further connected with the diffuser.

[0010] According to the integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application, the mixer is further connected with the diffuser.

[0011] According to the integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application, the top surface of the mixer is provided with a first flow guide channel, and the bottom surface of the mixer is provided with at least two second flow guide channels, and the first flow guide channel is located between the two adjacent second flow guide channels.

[0012] According to the integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application, the inner cone comprises a first flow guide part and a second flow guide part, the first flow guide part is used for being connected with the side wall of the afterburner, one end of the second flow guide part is connected with the first flow guide part, and the other end of the second flow guide part is connected with the inner wall surface of the bottom of the afterburner.

[0013] According to the integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application, the second flow guide part is in an arc structure.

[0014] The integrated assembly of the air-cooled inner cone and the support plate diffuser injection oil stabilizer provided by the application has the advantages that the diffuser, the support plate and the inner cone are arranged as an integral part, the compactness and the strength of the structure are improved, the interference and the airflow separation phenomenon between the parts are reduced, the flow loss in the afterburner is reduced, and the performance and the reliability of the whole engine are improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0016] Figure 1 is a structural schematic view of the integrated assembly of the internal cone and strut diffuser fuel injection stabilizer cooled by bleed air provided by the present application;

[0017] Figure 2 is a structural schematic view of the integrated assembly of the internal cone and strut diffuser fuel injection stabilizer cooled by bleed air provided by the present application;

[0018] Figure 3 is a structural schematic view of the integrated assembly of the internal cone and strut diffuser fuel injection stabilizer cooled by bleed air provided by the present application installed in the afterburner;

[0019] Figure 4 is a structural schematic view of the integrated assembly of the internal cone and strut diffuser fuel injection stabilizer cooled by bleed air provided by the present application installed in the afterburner;

[0020] Reference signs:

[0021] 10, afterburner; 11, inlet of the afterburner;

[0022] 20, integrated assembly of the internal cone and strut diffuser fuel injection stabilizer cooled by bleed air;

[0023] 21, diffuser; 211, oil inlet; 22, strut; 221, fuel injection port; 222, first groove; 23, internal cone; 231, cooling port; 232, second groove; 233, first flow guide part; 234, second flow guide part; 24, mixer; 241, first flow guide channel; 242, second flow guide channel; 30, oil pipe. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0026] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0027] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0028] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation on the present application.

[0029] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0030] The following embodiments of the present application will be described below in conjunction with Figures 1-4 The air-cooled inner cone and strut expander oil injection stabilizer integrated assembly 20 of the present application is described.

[0031] The air-cooled inner cone and strut expander oil injection stabilizer integrated assembly 20 of the present application is provided, which is installed in the afterburner 10, such as Figure 3 and Figure 4 The air-cooled inner cone and strut expander oil injection stabilizer integrated assembly 20 includes an expander 21, a strut 22 and an inner cone 23, and the expander 21, the strut 22 and the inner cone 23 are all arranged in the afterburner 10. Such as Figure 1 and Figure 2As shown, the diffuser 21 is arranged on the top surface of the support plate 22, and the extension direction of the diffuser 21 is consistent with the flow direction of the airflow in the afterburner 10, and the diffuser 21 and the top surface of the afterburner 10 form a first flow channel. The diffuser 21 is used to slow down the high-speed intake airflow and increase the pressure of the airflow, so as to provide suitable airflow conditions for the subsequent combustion process. In an embodiment, the diffuser 21 includes a first diffuser plate, a second diffuser plate and a third diffuser plate, which are connected in sequence, the first diffuser plate is connected with the inner wall of the afterburner 10 and is located at the inlet of the afterburner 10, and the bottom surface of the third diffuser plate is connected with the top surface of the support plate 22. The second diffuser plate is arranged to be inclined upward along the direction from the first diffuser plate to the third diffuser plate, so as to slow down the intake airflow. The inner cone 23 is arranged on the bottom surface of the support plate 22, and the extension direction of the inner cone 23 is consistent with the flow direction of the airflow in the afterburner 10, and the inner cone 23 and the bottom surface of the diffuser 21 form a second flow channel. It should be noted that the width of the diffuser 21 is greater than the width of the support plate 22, and the width of the inner cone 23 is greater than the width of the support plate 22, that is, the airflow in the second flow channel can flow through both sides of the support plate 22 in the width direction. The first flow channel and the second flow channel are respectively communicated with the inlet 11 of the afterburner, so that the airflow can be effectively distributed into the two flow channels.

[0032] The airflow passing through the inlet 11 of the afterburner is divided into two parts: one part of the airflow enters the first flow channel, is slowed down and pressurized by the diffuser 21, and provides high-pressure airflow for the combustion chamber; the other part of the airflow enters the second flow channel and is guided into the combustion chamber by the inner cone 23, and the inner cone 23 helps to enhance the mixing of air and fuel, thereby improving the combustion efficiency.

[0033] Further, the diffuser 21, the support plate 22 and the inner cone 23 in the embodiment of the present application are integrally formed. Compared with the prior art in which the diffuser 21, the support plate 22 and the inner cone 23 are arranged separately, the compactness and strength of the structure are improved, the interference and airflow separation between the components are reduced, the flow loss in the afterburner 10 is reduced, and the performance and reliability of the overall engine are improved.

[0034] In the embodiment of the present application, the support plate 22 is provided with a cooling channel, and the inner cone 23 is provided with a cooling port 231, which is communicated with the inlet of the cooling channel to ensure that the cooling gas can smoothly enter the cooling channel. The support plate 22 is provided with an air outlet which is communicated with the outlet of the cooling channel to form a complete cooling loop. The cooling port 231 is used to be communicated with the outlet of the cooling device, such as a nuclear fan, and the cooling gas is introduced by the nuclear fan, and the cooling gas enters the cooling channel through the cooling port 231 to cool the support plate 22. The cooling gas is sprayed out of the air outlet after flowing through the cooling channel, not only achieving the purpose of cooling the support plate 22, but also improving the oxygen content around the support plate 22, which helps to improve the combustion effect.

[0035] Further, the cooling ports 231 are multiple, such as Figure 2 As shown, the number of cooling ports 231 is 2, and can also be 3, 6, etc. The number of cooling channels is less than or equal to the number of cooling ports 231, each cooling channel is in communication with at least one cooling port 231, and the number of air outlets is also multiple, each cooling channel is connected with an air outlet. The cooling gas can enter the cooling channel through multiple cooling ports 231 to improve the cooling effect, and at the same time, the oxygen content around the support plate 22 can be improved and more uniform.

[0036] The injection of cooling gas helps to match the fuel concentration and improve the oxygen content around the fuel jet, thereby solving the problem of oil-gas matching of aviation kerosene combustion in a low-oxygen high-temperature environment. The cooling gas in the embodiment of the present application improves the cooling effect while also improving the penetration of the fuel jet. This structure enables the fuel to burn in a more optimal oxygen environment, improves the combustion efficiency, reduces the emission of unburned hydrocarbons and nitrogen oxides, and further improves the performance and environmental protection of the engine. In addition, by precisely controlling the flow and temperature of the cooling gas, the present application can ensure effective cooling of the support plate 22 and other high-temperature components under extreme working conditions, prolong the service life of the engine, and improve the overall reliability and safety of the engine.

[0037] In the prior art, the outer bypass flow is usually used for cooling the components in the hot core flow. However, under the condition of high flow rate of the hot core flow, the pressure of the outer bypass flow is less than that of the inner bypass flow, so this cooling method cannot be used. The core fan bleed air cooling mode adopted by the present application can meet the needs of any pressure difference between the inner and outer bypasses, and is suitable for cooling requirements under different conditions.

[0038] The oil inlet 211 is provided on the diffuser 21 in the embodiment of the present application, the oil injection port 221 is provided on the side wall of the support plate 22, the oil inlet 211 is communicated with the oil supply device through the oil pipe 30, the oil pipe 30 is inserted into the oil inlet 211 and communicated with the oil injection port 221, under the action of the oil supply pressure, the fuel is injected into the combustion chamber through the oil injection port 221, and rapidly atomized and burned under the action of the airflow in the afterburner 10. It should be noted that the support plate 22 is provided with an oil passage for the oil supply pipe 30 to pass through, and the oil passage is used to deliver the fuel from the oil inlet 211 to the oil injection port 221. At least one cooling channel can be arranged close to the oil passage to cool the oil passage and the oil pipe 30 inside to prevent deformation or coking of the oil pipe 30 due to high temperature.

[0039] In one embodiment, the gas outlet is arranged close to the fuel injection port 221, for example, the gas outlet is arranged opposite to the fuel injection port 221, so that the cooled gas can directly contact the fuel sprayed by the fuel injection port 221, which helps to improve the atomization effect of the fuel and the combustion efficiency, thereby improving the overall combustion effect.

[0040] As shown in Figure 2 and Figure 3 The side wall of the support plate 22 is provided with a first groove 222, the first groove 222 is arranged along the height direction of the support plate 22, and the axis of the first groove 222 is perpendicular to the axis of the inlet of the afterburner. The fuel injection port 221 is arranged on the side wall of the first groove 222, and the fuel sprayed by the fuel injection port 221 can form a stable oil-gas mixture in the first groove 222, thereby realizing the effect of stabilizing the flame. The first groove 222 can also guide the airflow and enhance the mixing, further optimizing the combustion process. In addition, it also helps to reduce the airflow disturbance in the combustion chamber and improve the stability of combustion and the overall performance of the engine. At this time, the gas outlet can be arranged on the side wall of the first groove 222, for example, the gas outlet is arranged opposite to the fuel injection port 221. In one embodiment, the opposite sides of the support plate 22 are each provided with a first groove 222, that is, along the flow direction of the airflow in the afterburner 10, the two first grooves are arranged on the opposite sides of the support plate.

[0041] Further, the top surface of the inner cone 23 is also provided with a second groove 232, and the first groove 222 and the second groove 232 are communicated, so that a vortex backflow is formed between the inner cone 23 and the support plate 22, which helps to stabilize the flame and improve the combustion efficiency. The first groove 222 and the second groove 232 are communicated, so that the fuel can be more fully mixed with the airflow after being sprayed, thereby improving the degree of complete combustion of the fuel; it also can reduce the flow loss of the airflow; further improve the working performance and reliability of the afterburner 10. In one embodiment, the top surface of the inner cone 23 is provided with two second grooves 232, and the two second grooves 232 are arranged on the opposite sides of the support plate 22 along the flow direction of the airflow, and each second groove 232 is communicated with the corresponding first groove 222.

[0042] Further, the bottom surface of the diffuser 21 is also provided with a third groove (not marked in the figure), and the third groove is communicated with the first groove 222, that is, the third groove, the first groove 222 and the second groove 232 are communicated in sequence, so that a vortex backflow is formed between the diffuser 21, the support plate 22 and the inner cone 23, which helps to stabilize the flame. In one embodiment, the bottom surface of the diffuser 21 is provided with two third grooves, and the two third grooves are arranged on the opposite sides of the support plate 22 along the flow direction of the airflow, and each third groove is communicated with the corresponding first groove 222.

[0043] The air-cooled inner cone and the diffuser of the oil injection stabilizer integrated assembly 20 provided by the embodiment of the present application further comprises a mixer 24, the first side of the mixer 24 is connected with the diffuser 21, and the mixer 24 is located at the side of the diffuser 21 away from the inlet of the afterburner 10. The extension direction of the mixer 24 is consistent with the flow direction of the airflow in the afterburner 10.

[0044] In the embodiment of the present application, the mixer 24 is arranged downstream of the diffuser 21, and the airflow in the first flow channel and the airflow in the second flow channel can be mixed under the action of the mixer 24, thereby reducing the flow loss and improving the kinetic energy utilization of the airflow. In the case that the outer bypass oil injection rod is arranged at the top of the afterburner 10, the mixer 24 can quickly mix the fuel injected by the outer bypass oil injection rod with the airflow in the first flow channel, which helps to improve the atomization and evaporation speed of the fuel, thereby accelerating the combustion process and improving the combustion efficiency.

[0045] In one embodiment, the mixer 24 is arranged downwardly along the first side of the mixer 24 towards the second side of the mixer 24, which helps to mix the airflows in the first flow channel and the second flow channel.

[0046] Further, the top surface of the mixer 24 is provided with a first flow guide channel 241, and the first flow guide channel 241 is arranged along the extension direction of the mixer 24. The first flow guide channel 241 is arranged to guide the airflow in the first flow channel to smoothly flow into the second end of the mixer 24. The bottom surface of the mixer 24 is provided with at least a second flow guide channel 242, and the second flow guide channel 242 is also arranged along the extension direction of the mixer 24. A plurality of second flow guide channels 242 are arranged in the width direction of the mixer 24. The airflow in the second flow channel can be effectively guided and distributed into the plurality of second flow guide channels 242 to mix with the airflow in the first flow guide channel at the end of the mixer 24. In the case that the oil is injected by the outer bypass oil injection rod, the airflow can be quickly mixed with the fuel.

[0047] The first flow guide channel 241 is located between two adjacent first flow guide channels 241. The airflow in the first flow channel flows along the first flow guide channel 241, and the airflow in the second flow channel flows along the second flow guide channel 242. At the end of the mixer 24, the two kinds of airflows meet and mix, thereby realizing efficient power enhancement and combustion optimization.

[0048] In one embodiment, the mixer 24 in the embodiment of the present application is an integral molding part with the diffuser 21. The diffuser 21, the mixer 24, the support plate 22 and the inner cone 23 are integral molding parts.

[0049] The inner cone 23 in the embodiment comprises a first flow guide part 233 and a second flow guide part 234. The first end of the first flow guide part 233 is connected with the afterburner 10 and is located below the inlet of the afterburner 10, and the second end of the first flow guide part 233 is connected with one end of the second flow guide part 234, and the other end of the second flow guide part 234 is connected with the inner wall of the bottom of the afterburner 10. The second groove 232 can be arranged on the top surface of the first flow guide part 233.

[0050] In one embodiment, the second flow guide part 234 is in an arc-shaped structure, which can better guide the airflow, reduce the loss of airflow at the turning place, and improve the flow guiding efficiency of the airflow. The arc-shaped structure generally has high structural strength and can withstand high-temperature and high-pressure working environments, thereby improving the durability of the inner cone 23. The arc-shaped design helps to reduce the turbulence and separation of the airflow, thereby reducing the flow loss and improving the performance of the overall combustion chamber.

[0051] The first flow guide part 233 comprises a first flow guide plate and a second flow guide plate. The first end of the first flow guide plate is connected with the inner wall of the afterburner 10 and is located below the inlet 11 of the afterburner, and the top surface of the second flow guide plate is connected with the bottom surface of the support plate 22, one end of the second flow guide plate is connected with the second end of the first flow guide plate, and the other end of the second flow guide plate is connected with the second flow guide part 234. In one embodiment, the first end of the first flow guide plate is inclined upward toward the direction of the second flow guide plate.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated assembly of an internal cone and strut diffuser with bleed air cooling for an oil stabilizer, applied to an afterburner, characterized in that, The application relates to a mixed-flow nozzle for a turbofan engine. The mixed-flow nozzle comprises an expander, a support plate and an inner cone, the expander is arranged on the top surface of the support plate and forms a first flow channel with the top surface of the afterburner, the inner cone is arranged on the bottom surface of the support plate and forms a second flow channel with the bottom surface of the expander, the first flow channel and the second flow channel are respectively communicated with the inlet of the afterburner, and the expander, the support plate and the inner cone are integrally formed. The expander is provided with an oil inlet, the side wall of the support plate is provided with an oil injection port, and the oil inlet is communicated with the oil injection port. The side wall of the support plate is provided with a first groove, the first groove is arranged along the height direction of the support plate, the axis of the first groove is perpendicular to the axis of the inlet of the afterburner, and the oil injection port is arranged on the side wall of the first groove. The top surface of the inner cone is provided with a second groove, and the first groove is communicated with the second groove. The mixed-flow nozzle further comprises a mixer, the first side of the mixer is connected with the expander and located on the side of the expander away from the inlet of the afterburner, and the mixer and the expander are integrally formed. The mixer is downwardly inclined along the first side of the mixer towards the second side of the mixer.

2. The integrated assembly of an internal cone and struts with plenum for an air-cooled fuel injector stabilizer of claim 1, wherein, The support plate is provided with a cooling channel, the inner cone is provided with a cooling port, and the support plate is provided with an air outlet, the cooling port and the air outlet are respectively communicated with the cooling channel, and the cooling port is used for being communicated with the outlet of a cooling device.

3. The integrated assembly of an internal cone and struts with plenum for an air-cooled fuel injector stabilizer of claim 1, wherein, The top surface of the mixer is provided with a first flow guide channel, the bottom surface of the mixer is provided with at least two second flow guide channels, the first flow guide channel is located between the two adjacent second flow guide channels, and the first flow guide channel and the second flow guide channels are respectively arranged along the extension direction of the mixer.

4. The integrated assembly of an internal cone and struts with plenum for an air-cooled fuel injector stabilizer of claim 1, wherein, The inner cone comprises a first flow guide part and a second flow guide part, the first flow guide part is used for being connected with the side wall of the afterburner, one end of the second flow guide part is connected with the first flow guide part, and the other end of the second flow guide part is connected with the inner wall surface of the bottom of the afterburner.

5. The integrated assembly of an internal cone and struts with plenum cooling of an oil stabilizer according to claim 4, characterized in that, The second flow guide part is in an arc structure.

Images