Afterburner partitioned oil supply method based on oil injection of rear duct ejector

Abstract

The afterburner partitioned oil supply method based on oil injection of the rear duct ejector comprises the steps that according to the real-time duct ratio of an afterburner, an oil supply mode corresponding to the afterburner is determined; the real-time oxygen flow corresponding to each oil supply area is determined; according to the oil supply mode and the real-time oxygen flow corresponding to each oil supply area, the target oil supply amount corresponding to each oil supply area is determined; and according to the target oil supply amount corresponding to each oil supply area, a target oil way control scheme corresponding to each oil supply area is determined, and the target oil way control scheme corresponding to any oil supply area is used for controlling the oil injection amount of the oil supply branch corresponding to the oil supply area. By means of the afterburner, the adjustment change of the rear duct ejector can be adapted through partition matching oil supply, oil is independently supplied to the outer duct area based on the corresponding oil supply nozzles, oxygen-enriched air input by the rear duct ejector is fully utilized, and the combustion efficiency of the afterburner under various working conditions and transition states is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of aero-engine design, and in particular to a method for zoning fuel supply to an afterburner chamber based on a rear duct ejector. Background Art

[0002] Variable cycle engines can change engine cycle parameters and achieve thermodynamic cycles with different characteristics by adjusting the geometry, size or position of some engine components. In some working modes, by adjusting the opening of the rear variable area bypass injector (RVABI), the air flow ratio of the inner and outer bypass of the variable cycle engine can be changed, so that the afterburner has the ability to work under wide bypass ratio conditions. At this time, a large amount of outer low-temperature oxygen-rich air can enter the afterburner through the RVABI, but it is difficult to mix and burn with the inner high-temperature oil-rich gas, resulting in a decrease in overall combustion efficiency and making it difficult for the outlet temperature of the afterburner to meet working requirements. Summary of the invention

[0003] In view of this, the present disclosure proposes a technical solution for a zoned fuel supply method for an afterburner combustion chamber based on rear duct ejector fuel injection.

[0004] According to one aspect of the present disclosure, there is provided a method for afterburner zoned fuel supply based on rear duct ejector fuel injection, comprising: determining a fuel supply mode corresponding to the afterburner according to a real-time bypass ratio of the afterburner, wherein the afterburner comprises a plurality of fuel supply areas, the plurality of fuel supply areas comprising an outer bypass area of ​​the afterburner, and a plurality of support plate partitions included in an inner bypass area of ​​the afterburner, the outer bypass area comprising a rear duct ejector for connecting the outer bypass area with a combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle, and an angle between a fuel injection direction of the fuel supply nozzle and an incoming air flow direction at an inlet of the rear duct ejector satisfies a value greater than or equal to 0° and less than or equal to 180°, The real-time opening of the rear duct ejector is adjusted to regulate the flow rate of air from the outer duct area to the combustion area in the afterburner. The multiple support plate partitions are obtained by dividing the inner duct area. The fuel supply mode is used to indicate whether the outer duct area is supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector; the real-time oxygen flow rate corresponding to each fuel supply area is determined respectively; according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area, the target fuel supply amount corresponding to each fuel supply area is determined; according to the target fuel supply amount corresponding to each fuel supply area, the target oil circuit control scheme corresponding to each fuel supply area is determined, wherein the target oil circuit control scheme corresponding to any one fuel supply area is used to control the fuel injection amount of the fuel supply branch corresponding to the fuel supply area.

[0005] In one possible implementation, respectively determining the real-time oxygen flow corresponding to each fuel supply area includes: determining the outer duct oxygen flow corresponding to the outer duct area according to the real-time outer duct air flow corresponding to the outer duct area, wherein the real-time outer duct air flow represents the flow of air entering the combustion area in the afterburner from the outer duct area through the rear duct ejector; for any support plate partition, determining the partition oxygen flow corresponding to the support plate partition according to the total effective flow area corresponding to the inner duct area and the partition effective flow area corresponding to the support plate partition.

[0006] In a possible implementation, the target fuel supply corresponding to each fuel supply area is determined according to the fuel supply mode and the real-time oxygen flow corresponding to each fuel supply area, including: when the fuel supply mode indicates that the outer duct area is supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the target fuel supply corresponding to the outer duct area is determined according to the outer duct oxygen flow corresponding to the outer duct area; and the target fuel supply corresponding to each support plate partition is determined according to the partition oxygen flow corresponding to each support plate partition.

[0007] In one possible implementation, the multiple support plate partitions include at least one support plate outer zone and at least one support plate inner zone, wherein the support plate outer zone represents the support plate partition close to the outer duct area, and the support plate inner zone represents the support plate partition far from the outer duct area; the target fuel supply amount corresponding to each fuel supply area is determined according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area, including: when the fuel supply mode indicates that the outer duct area is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the target fuel supply amount corresponding to each support plate outer zone is determined according to the outer duct oxygen flow rate corresponding to the outer duct area and the partition oxygen flow rate corresponding to each support plate outer zone; the target fuel supply amount corresponding to each support plate inner zone is determined according to the partition oxygen flow rate corresponding to each support plate inner zone.

[0008] In a possible implementation, the target oil circuit control scheme corresponding to each oil supply area is determined according to the target oil supply amount corresponding to each oil supply area, including: when the oil supply mode indicates that the outer duct area is supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, the initial oil circuit control scheme corresponding to the outer duct area is determined according to a preset engine working state and the target oil supply amount corresponding to the outer duct area; according to multiple target engine working states, the initial oil circuit control scheme corresponding to the outer duct area is iteratively optimized to determine the target oil circuit control scheme corresponding to the outer duct area; for any support plate partition, the initial oil circuit control scheme corresponding to the support plate partition is determined according to the preset engine working state and the target oil supply amount corresponding to the support plate partition; according to multiple target engine working states, the initial oil circuit control scheme corresponding to the outer duct area and each support plate partition is iteratively optimized to determine the target oil circuit control scheme corresponding to the outer duct area and each support plate partition.

[0009] In one possible implementation, the target oil circuit control scheme corresponding to each oil supply area is determined according to the target oil supply amount corresponding to each oil supply area, including: when the oil supply mode indicates that the outer duct area is not supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, for any support plate partition, according to the preset engine operating state and the target oil supply amount corresponding to the support plate partition, the initial oil circuit control scheme corresponding to the support plate partition is determined; according to multiple target engine operating states, the initial oil circuit control scheme corresponding to each support plate partition is iteratively optimized to determine the target oil circuit control scheme corresponding to each support plate partition.

[0010] In one possible implementation, the method further includes: determining a full-envelope fuel supply law based on a target oil circuit control scheme corresponding to each fuel supply area, wherein the full-envelope fuel supply law is used to simulate the oil circuit control scheme corresponding to any fuel supply area under any engine operating state; determining performance parameters of an aircraft engine including the afterburner under different engine operating states based on the full-envelope fuel supply law; and for any engine operating state, adjusting the target oil circuit control scheme corresponding to at least one fuel supply area based on the performance parameters corresponding to the aircraft engine under the engine operating state, and determining an adjusted oil circuit control scheme corresponding to the fuel supply area.

[0011] In the disclosed embodiment, the afterburner is divided into an outer duct area including the afterburner, and a plurality of support plate partitioned fuel supply areas of the inner duct area of ​​the afterburner, wherein the outer duct area includes a rear duct ejector for connecting the outer duct area and the combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle, and the angle between the fuel injection direction of the fuel supply nozzle and the air flow direction at the inlet of the rear duct ejector satisfies greater than or equal to 0° and less than or equal to 180, and the real-time opening of the rear duct ejector is adjusted to adjust the flow rate of air from the outer duct area into the combustion area in the afterburner. The plurality of support plate partitions are obtained by dividing the inner duct area, and the outer duct area and the fuel supply oil path of each support plate partition can be designed in a targeted manner, so as to facilitate the subsequent use of the rear duct ejector to spray fuel to the outer duct area separately, and the support plate partitioning planning of the inner duct area, so as to comprehensively improve the fuel-oxygen matching accuracy and the oil-gas mixing effect, thereby improving the overall combustion efficiency of the afterburner. According to the real-time bypass ratio of the afterburner, the fuel supply mode corresponding to the afterburner can be determined to indicate whether to supply fuel to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, so as to adapt the fuel supply scheme to the real-time adjustment changes of the rear duct ejector, so that the afterburner can flexibly adjust the fuel supply mode according to the changes in the bypass ratio, thereby improving the adaptability of the afterburner to different bypass ratio operating conditions and transition states within a wide bypass ratio range. By determining the real-time oxygen flow corresponding to each fuel supply area respectively, and combining it with the fuel supply mode, the target fuel supply corresponding to each fuel supply area can be determined, and fuel-oxygen matching can be achieved for each fuel supply area, thereby improving the accuracy of the target fuel supply corresponding to each fuel supply area, while fully utilizing the oxygen in each fuel supply area, reducing the possibility of insufficient fuel combustion and avoiding fuel waste; according to the target fuel supply corresponding to each fuel supply area, the target oil circuit control scheme corresponding to each fuel supply area is determined to accurately control the fuel injection amount of the fuel supply branch corresponding to each fuel supply area, ensuring that the fuel and oxygen can be fully mixed and burned, improving the overall combustion efficiency of the afterburner under large bypass ratio conditions and transitional conditions, and the outlet temperature of the afterburner, thereby achieving the effect of increasing the thrust of the aircraft engine.

[0012] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0014] Figure 1 A flow chart showing a method for afterburner chamber zoned fuel supply based on rear duct ejector fuel injection according to an embodiment of the present disclosure;

[0015] Figure 2 A schematic structural diagram of an afterburner chamber with a rear duct ejector supplying fuel according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0016] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0017] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0018] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0019] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present disclosure.

[0020] The variable cycle engine can change the engine cycle parameters by adjusting the geometry, size or position of some of its internal components, for example, by adjusting the opening of the rear variable area bypass injector (RVABI), etc., to achieve thermodynamic cycles with different characteristics and switch the engine's operating mode. By switching the engine's operating mode, it can work within a wide bypass ratio range, and can simultaneously have the low fuel consumption of a high bypass ratio turbofan engine at subsonic speeds, and the high thrust advantages of a low bypass ratio engine at supersonic speeds, enhancing the engine's adaptability to complex and variable tasks.

[0021] Specifically, by adjusting the opening of RVABI, the ratio of the air flow rate of the outer duct and the inner duct can be adjusted, so that the afterburner has the ability to work within a wide bypass ratio range. However, the traditional single afterburner fuel supply design is difficult to take into account different bypass ratio conditions, that is, it cannot guarantee that the fuel can be fully and efficiently burned under each different bypass ratio condition within a wide bypass ratio range, as well as in the transition state. Especially under large bypass ratio conditions, after a large amount of outer duct low-temperature oxygen-rich air enters the combustion chamber through RVABI in the form of an induced airflow, it is difficult to mix and burn with the high-temperature oil-rich gas in the inner area, resulting in a sharp drop in the overall combustion efficiency of the afterburner, and the outlet temperature of the afterburner is difficult to meet the engine working requirements.

[0022] In view of this, the present disclosure provides a method for zoning fuel supply to the afterburner based on the injection of the rear duct ejector, which can be applied to the variable cycle engine, and can dynamically adjust the fuel supply mode according to the real-time bypass ratio of the afterburner, so that the outer duct area can be separately supplied with fuel through the injection of the rear duct ejector under the large bypass ratio working condition and the transition state, so as to make full use of the oxygen-rich air input through the rear duct ejector, improve the overall combustion efficiency and outlet temperature of the afterburner, and increase the thrust of the aircraft engine; and improve the adaptability of the afterburner to different bypass ratio working conditions within a wide bypass ratio range, so that the afterburner can maintain a good oil-gas match under different bypass ratio working conditions, and ensure that the aircraft engine can maintain a high operating performance under different working conditions. The following is a detailed description of the method for zoning fuel supply to the afterburner based on the injection of the rear duct ejector disclosed in the present disclosure.

[0023] Figure 1 A flow chart of a method for zoned fuel supply to an afterburner chamber based on rear ducted ejector fuel injection according to an embodiment of the present disclosure is shown. The method for zoned fuel supply to an afterburner chamber based on rear ducted ejector fuel injection can be executed by an electronic device such as a terminal device or a server. The terminal device can be a user equipment (UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (PDA), a handheld device, a computing device, a vehicle-mounted device, a wearable device, etc. The method for zoned fuel supply to an afterburner chamber based on rear ducted ejector fuel injection can be implemented by a processor calling computer-readable instructions stored in a memory. Alternatively, the method for zoned fuel supply to an afterburner chamber based on rear ducted ejector fuel injection can be executed by a server. As Figure 1 As shown, the afterburner chamber zoned fuel supply method based on rear duct ejector fuel injection includes:

[0024] In step S11, the fuel supply mode corresponding to the afterburner is determined according to the real-time bypass ratio of the afterburner, wherein the afterburner includes a plurality of fuel supply areas, the plurality of fuel supply areas include an outer bypass area of ​​the afterburner, and a plurality of support plate partitions included in an inner bypass area of ​​the afterburner, the outer bypass area includes a rear duct ejector for connecting the outer bypass area and the combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle, and the angle between the fuel injection direction of the fuel supply nozzle and the air flow direction at the inlet of the rear duct ejector satisfies greater than or equal to 0° and less than or equal to 180, the real-time opening of the rear duct ejector is adjusted to adjust the flow rate of air from the outer bypass area to the combustion area in the afterburner, the plurality of support plate partitions are obtained by dividing the inner bypass area, and the fuel supply mode is used to indicate whether fuel is supplied to the outer bypass area through the fuel supply nozzle corresponding to the rear duct ejector.

[0025] Specifically, the specific form of the afterburner here can refer to the afterburner including the rear duct ejector in the common variable cycle engine, and its internal area can be divided into a fuel supply area and a combustion area. Among them, the fuel supply area can include the outer duct area and the inner duct area of ​​the afterburner, and the outer duct area is provided with a rear duct ejector for connecting the outer duct area and the combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle. By adjusting the real-time opening of the rear duct ejector, the flow rate of air from the outer duct area to the combustion area in the afterburner can be adjusted, thereby realizing the adjustment of the real-time bypass ratio of the afterburner. The specific form of the rear duct ejector can refer to the implementation method in the relevant technology, and the present disclosure does not make specific restrictions on this. The inner duct area can be divided into a plurality of support plate partitions, and the specific number thereof can be flexibly set according to the actual use requirements, and the present disclosure does not make specific restrictions on this. The specific form of the fuel supply nozzle corresponding to the rear duct ejector, and the nozzle parameters corresponding to the fuel supply nozzle (such as nozzle caliber, nozzle flow, etc.) can be flexibly set according to the actual use requirements, and the present disclosure does not make specific restrictions on this. In addition, the specific number of the oil supply nozzles corresponding to the rear duct ejector can also be flexibly set according to actual usage requirements, and is at least one, and the present disclosure does not make specific limitations on this.

[0026] It should be noted that the angle between the injection direction of the fuel supply nozzle corresponding to the rear duct ejector and the air flow direction at the inlet of the rear duct ejector should be greater than or equal to 0° and less than or equal to 180°; preferably, the angle between the injection direction of the fuel supply nozzle corresponding to the rear duct ejector and the air flow direction at the inlet of the rear duct ejector is 90°

[0027] By dividing the fuel supply area of ​​the afterburner, the outer duct area and the fuel supply path of each support plate partition can be designed in a targeted manner, so that the outer duct area can be individually fueled through the fuel supply nozzle corresponding to the rear duct ejector. Combined with the support plate zoning planning of the inner duct area, the fuel-oxygen matching accuracy and the oil-gas mixing effect can be comprehensively improved from two aspects, thereby improving the overall combustion efficiency of the afterburner.

[0028] Figure 2 FIG. 2 is a schematic diagram showing the structure of an afterburner including a rear duct ejector according to an embodiment of the present disclosure. Figure 2 As shown, Figure 2 (a) in the figure shows a side cross-sectional view of the afterburner. Figure 2 (b) in the figure shows the cross-section of the flow channel (including the inner and outer regions) of the afterburner along the direction perpendicular to the airflow. Figure 2 As shown in (a) in the figure, the afterburner includes: an outer duct area 201, an inner duct area 202 and a combustion area 203. The outer duct area 201 is connected to the combustion area 203 through a rear duct ejector 2011. The rear duct ejector 2011 can input the oxygen-rich air input from the outer duct into the combustion area in the form of ejected air; the rear duct ejector 2011 is also provided with an oil supply nozzle 212, which can be used to supply oil to the outer duct area 201 separately, and its oil injection direction is perpendicular to the airflow direction corresponding to the outer duct ejected air. Figure 2 As shown in (b), the connotation area 202 is a support plate area provided with a vertical support plate 2023. The support plate area is divided into a support plate partition 2021 and a support plate partition 2022 with the mid-perpendicular line of the vertical support plate 203 (i.e., the dotted line in the figure) as the partition boundary.

[0029] By adjusting the real-time opening of the rear duct ejector, that is, changing the opening angle of the rear duct ejector, the flow rate of the ejected airflow from the outer duct area into the combustion area in the afterburner can be adjusted, thereby changing the bypass ratio of the afterburner, so that the afterburner has the ability to work within a wide bypass ratio range. Accordingly, the real-time opening of the rear duct ejector can be adjusted according to the preset target bypass ratio, so that the real-time bypass ratio of the afterburner is equal to the target bypass ratio. Among them, the specific method of adjusting the real-time opening of the rear duct ejector based on the preset target bypass ratio can be flexibly set according to actual use requirements, and the present disclosure does not make specific limitations on this.

[0030] In one possible implementation, the flow of the rear duct ejector can be matched in advance according to the rated internal air flow, internal inlet pressure, rated external air flow, and external inlet pressure corresponding to the afterburner, and the mapping relationship between the opening of the rear duct ejector and the bypass ratio corresponding to the afterburner can be determined; then the real-time opening of the rear duct ejector can be adjusted according to the preset target bypass ratio and the mapping relationship.

[0031] Among them, the specific method of flow matching for the rear duct ejector can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations on this.

[0032] In one example, after setting the initial opening for the rear duct ejector, the outlet pressure of the afterburner can be adjusted so that the difference between the real-time internal air flow corresponding to the internal area and the rated internal air flow meets the error threshold, and then the opening of the rear duct ejector is adjusted according to the real-time external air flow corresponding to the external area and the rated external air flow.

[0033] When the real-time external air flow is less than the rated external air flow, the opening of the rear duct ejector is increased until the difference between the real-time external air flow and the rated external air flow meets the error threshold, and the flow matching for the rear duct ejector is completed; when the real-time external air flow is greater than the rated external air flow, the opening of the rear duct ejector is reduced until the difference between the real-time external air flow and the rated external air flow meets the error threshold, and the flow matching for the rear duct ejector is completed. Among them, the specific value of the error threshold can be flexibly set according to actual use requirements, depending on the accuracy of the rear duct ejector, and the present disclosure does not make specific limitations on this.

[0034] According to the real-time bypass ratio of the afterburner, the current working condition of the afterburner can be determined, and then the corresponding fuel supply mode of the afterburner can be adjusted. Specifically, when the real-time bypass ratio meets the preset bypass ratio threshold, it can be determined that the afterburner is in a large bypass ratio condition. At this time, in order to improve the afterburner's ability to utilize the low-temperature oxygen-rich air input to the outer duct area under the large bypass ratio condition, improve the combustion efficiency and the outlet temperature of the afterburner, the outer duct area can be matched and supplied separately, and the fuel supply mode corresponding to the afterburner is determined to indicate that the outer duct area is supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector. When the real-time bypass ratio does not meet the preset bypass ratio threshold, it can be determined that the afterburner is in a small bypass ratio condition. At this time, the low-temperature oxygen-rich air input to the outer duct area is small. In order to avoid damage caused by fuel injection to the rear duct ejector, only the multiple support plate partitions in the inner duct area can be matched and supplied, and the fuel supply mode corresponding to the afterburner is determined to indicate that the outer duct area is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector.

[0035] Among them, the specific value of the preset bypass ratio threshold can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations on this.

[0036] In one example, the bypass ratio threshold value may be set to 0.3. When the real-time bypass ratio of the afterburner is greater than 0.3, it may be determined that the afterburner is in a large bypass ratio condition, and when the real-time bypass ratio of the afterburner is less than or equal to 0.3, it may be determined that the afterburner is in a small bypass ratio condition.

[0037] By using the real-time bypass ratio of the afterburner as a basis to determine the fuel supply mode, the afterburner can flexibly adjust the fuel supply mode according to the change of the bypass ratio, thereby improving the adaptability of the afterburner to different bypass ratio working conditions within a wide bypass ratio range.

[0038] In step S12, the real-time oxygen flow rate corresponding to each fuel supply area is determined respectively.

[0039] During the operation of the engine, the real-time oxygen flow rate corresponding to each fuel supply area can be monitored in real time for subsequent fuel-oxygen matching, which can improve the accuracy of fuel supply. The specific method of determining the real-time oxygen flow rate corresponding to each fuel supply area can be flexibly set according to actual usage requirements. For example, flow sensors can be set in the outer area and each support plate partition, etc., and this disclosure does not make specific limitations on this.

[0040] The process of determining the real-time oxygen flow rate corresponding to each fuel supply area will be described in detail later in conjunction with possible implementation methods of the present disclosure, and will not be elaborated here.

[0041] In step S13, the target fuel supply amount corresponding to each fuel supply area is determined according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area.

[0042] According to the fuel supply mode corresponding to the afterburner and the real-time oxygen flow corresponding to each fuel supply area, fuel-oxygen matching can be performed for each fuel supply area respectively, and the target fuel supply corresponding to each fuel supply area can be determined to improve the accuracy of fuel supply to each fuel supply area. In addition, the mixing degree of fuel and air can be improved by zoned fuel supply, so that under any bypass ratio condition, the afterburner can maintain a high combustion efficiency, ensuring high performance of the engine in various operating modes.

[0043] The process of determining the target fuel supply amount corresponding to each fuel supply area according to the fuel supply mode and the real-time oxygen flow corresponding to each fuel supply area will be described in detail later in combination with possible implementation methods of the present disclosure, which will not be elaborated here.

[0044] In step S14, the target oil circuit control scheme corresponding to each oil supply area is determined according to the target oil supply amount corresponding to each oil supply area, wherein the target oil circuit control scheme corresponding to any oil supply area is used to control the oil injection amount of the oil supply branch corresponding to the oil supply area.

[0045] Any fuel supply area in the afterburner is provided with a corresponding fuel supply branch, and fuel can be supplied to the fuel supply area through a nozzle. The specific form of the fuel supply branch and the nozzle on the fuel supply branch can refer to the implementation method in the relevant technology, and the present disclosure does not make specific limitations on this.

[0046] The specific setting of the oil supply branch corresponding to the outer duct area, that is, the oil supply nozzle corresponding to the rear duct ejector, can be referred to the previous description and will not be elaborated here.

[0047] In a possible implementation, the oil supply branch corresponding to any support plate partition may be provided with multiple oil supply nozzles, and the multiple oil supply nozzles are arranged radially along the vertical support plate in the inner region, and the oil injection direction corresponding to each support plate oil supply nozzle is perpendicular to the vertical support plate in the inner region. The specific form of each oil supply nozzle and the nozzle parameters (such as nozzle diameter, nozzle flow rate, etc.) corresponding to each support plate oil supply nozzle can refer to the implementation methods in the relevant technology, and the present disclosure does not specifically limit this.

[0048] The specific form of the fuel supply branch corresponding to each support plate partition can be flexibly set according to actual use requirements, and the present disclosure does not make specific restrictions on this. It should be noted that, under normal circumstances, the fuel supply branch corresponding to each support plate partition is located in the same plane perpendicular to the support plate to ensure that different support plate partitions can simultaneously achieve mixing of fuel and air.

[0049] With the above Figure 2 For example, Figure 2 As shown in (a), a vertical fuel injection rod 2024 is provided in the inner region 202, and a plurality of fuel supply nozzles are provided on the fuel injection rod 2024. The portion of the fuel injection rod 2024 located in the support plate partition 2021 is the fuel supply branch corresponding to the support plate partition 2021; the portion of the fuel injection rod 2024 located in the support plate partition 2022 is the fuel supply branch corresponding to the support plate partition 2022.

[0050] In one example, a corresponding spray rod may be separately provided for each support plate partition, and the spray rod corresponding to any support plate partition may be provided on a vertical support plate within the inner region.

[0051] For any fuel supply area, according to the target fuel supply amount corresponding to the fuel supply area, the target oil circuit control scheme of the fuel supply area can be determined based on the principle of approximately equal spacing arrangement, on the basis of ensuring that the oxygen flow concentration in the control area corresponding to each fuel supply nozzle in the fuel supply area is approximately equal, so as to achieve accurate fuel supply to the fuel supply area, make full use of the oxygen in the fuel supply area, and improve the combustion effect. Among them, the target oil circuit control scheme corresponding to any fuel supply area can be used to control the fuel injection amount of the fuel supply branch corresponding to the fuel supply area, and its specific content can be flexibly set according to the specific form of the fuel supply area and combined with actual use requirements, and the present disclosure does not make specific limitations on this.

[0052] In one example, when the fuel supply area is an outer duct area, the target oil circuit control scheme corresponding to the outer duct area may include the fuel supply parameters corresponding to the fuel supply nozzle corresponding to the rear duct injector, such as fuel supply pressure, nozzle diameter, aspect ratio, number of injections, single injection time, single injection amount and the like.

[0053] In one example, when the oil supply area is divided into branch plate partitions, the target oil circuit control scheme corresponding to any branch plate partition may include the number of oil supply nozzles on the oil supply branch corresponding to the branch plate partition, the spacing between adjacent oil supply nozzles, the oil supply parameters corresponding to each oil supply nozzle, and the like.

[0054] The following text will describe in detail the process of determining the target oil circuit control scheme corresponding to each oil supply area according to the target oil supply amount corresponding to each oil supply area in combination with possible implementation methods of the present disclosure, and the present disclosure does not make specific limitations on this.

[0055] In the disclosed embodiment, the afterburner is divided into an outer duct area including the afterburner, and a plurality of support plate partitioned fuel supply areas of the inner duct area of ​​the afterburner, wherein the outer duct area includes a rear duct ejector for connecting the outer duct area and the combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle, and the angle between the fuel injection direction of the fuel supply nozzle and the air flow direction at the inlet of the rear duct ejector satisfies greater than or equal to 0° and less than or equal to 180, and the real-time opening of the rear duct ejector is adjusted to adjust the flow rate of air from the outer duct area into the combustion area in the afterburner. The plurality of support plate partitions are obtained by dividing the inner duct area, and the outer duct area and the fuel supply oil path of each support plate partition can be designed in a targeted manner, so as to facilitate the subsequent use of the rear duct ejector to spray fuel to the outer duct area separately, and the support plate partitioning planning of the inner duct area, so as to comprehensively improve the fuel-oxygen matching accuracy and the oil-gas mixing effect, thereby improving the overall combustion efficiency of the afterburner. According to the real-time bypass ratio of the afterburner, the fuel supply mode corresponding to the afterburner can be determined to indicate whether to supply fuel to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, so as to adapt the fuel supply scheme to the real-time adjustment changes of the rear duct ejector, so that the afterburner can flexibly adjust the fuel supply mode according to the changes in the bypass ratio, thereby improving the adaptability of the afterburner to different bypass ratio operating conditions and transition states within a wide bypass ratio range. By determining the real-time oxygen flow rate corresponding to each fuel supply area respectively, and combining it with the fuel supply mode, the target fuel supply corresponding to each fuel supply area can be determined, so as to achieve fuel-oxygen matching for each fuel supply area, and improve the accuracy of the target fuel supply corresponding to each fuel supply area, thereby reducing the possibility of insufficient fuel combustion and avoiding fuel waste while making full use of the oxygen in each fuel supply area; according to the target fuel supply corresponding to each fuel supply area, the target oil circuit control scheme corresponding to each fuel supply area is determined to accurately control the fuel injection amount of the fuel supply branch corresponding to each fuel supply area, so as to ensure that the fuel and oxygen can be fully mixed and burned, improve the overall combustion efficiency of the afterburner in the large bypass ratio condition and the transition state, and the outlet temperature of the afterburner, thereby achieving the effect of increasing the thrust of the aircraft engine.

[0056] In one possible implementation, the real-time oxygen flow rate corresponding to each fuel supply area is determined separately, including: determining the outer duct oxygen flow rate corresponding to the outer duct area according to the real-time outer duct air flow rate corresponding to the outer duct area, wherein the real-time outer duct air flow rate represents the flow rate of air entering the combustion area in the afterburner from the outer duct area through the rear duct ejector; for any support plate partition, determining the partition oxygen flow rate corresponding to the support plate partition according to the total effective flow area corresponding to the inner duct area and the partition effective flow area corresponding to the support plate partition.

[0057] For the outer duct area, the air flow rate from the outer duct area to the combustion area in the afterburner through the rear duct ejector can be monitored in real time to determine the real-time outer duct air flow rate corresponding to the outer duct area, and then combined with the oxygen ratio corresponding to the outer duct air to determine the outer duct oxygen flow rate corresponding to the outer duct area. wai It can be expressed as formula (1):

[0058] Oxygen wai =m wai *b (1)

[0059] Among them, m wai represents the real-time external air flow rate; b represents the oxygen ratio corresponding to the external air.

[0060] For the connotation area, the flow of the air input into the connotation area can be monitored in real time to determine the real-time connotation air flow corresponding to the connotation area; and then for any branch plate partition in the connotation area, the partition oxygen flow corresponding to the branch plate partition can be determined according to the real-time connotation air flow corresponding to the connotation area, the total effective flow area corresponding to the connotation area, the partition effective flow area corresponding to the branch plate partition, and the oxygen ratio corresponding to the connotation air. zhi It can be expressed as formula (2):

[0061]

[0062] Among them, m nei represents the real-time internal air flow; S1 represents the total effective flow area corresponding to the internal area; S zhi It represents the effective flow area of ​​any support plate partition; a represents the oxygen ratio corresponding to the contained air.

[0063] The specific method for determining the total effective flow area corresponding to the connotation area and the partition effective flow area corresponding to any support plate partition can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations on this.

[0064] In one example, the plane of the support plate perpendicular to the support plate of any support plate partition at the oil supply branch corresponding to the support plate partition can be used as a reference plane, and the reference cross section of the connotation area on the reference plane is determined, and the area of ​​the reference cross section is the total effective flow area corresponding to the connotation area. For any support plate partition, the boundary between the support plate partition and the adjacent support plate partition is used as the segmentation radial position, and the reference cross section is segmented by the segmentation radial position according to the effective flow area equalization method, so as to obtain the partition effective flow area corresponding to the support plate partition.

[0065] The specific method for determining the real-time external duct air flow rate and the real-time internal duct air flow rate can refer to the implementation methods in the relevant technology, for example, it can be obtained by the flow monitoring device set at the rear duct ejector and the entrance of the internal duct area, etc., and the present disclosure does not make specific limitations on this. The specific values ​​of the oxygen ratio corresponding to the external duct air and the oxygen ratio corresponding to the internal duct air can be determined by referring to the implementation methods in the prior art, and the present disclosure does not make specific limitations on this.

[0066] Through the above process, the oxygen flow rate corresponding to each fuel supply area can be individually determined, so as to facilitate the subsequent precise matching of fuel and oxygen, thereby achieving separate and accurate fuel supply to each fuel supply area, making full use of the oxygen in each fuel supply area, and thus improving the combustion efficiency of the afterburner.

[0067] In one possible implementation, the target fuel supply corresponding to each fuel supply area is determined according to the fuel supply mode and the real-time oxygen flow corresponding to each fuel supply area, including: when the fuel supply mode indicates that fuel is supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, the target fuel supply corresponding to the outer duct area is determined according to the outer duct oxygen flow corresponding to the outer duct area; and the target fuel supply corresponding to each support plate partition is determined according to the partition oxygen flow corresponding to each support plate partition.

[0068] When the fuel supply mode indicates that fuel is supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, the target fuel supply amount corresponding to the outer duct area can be determined based on the outer duct oxygen flow corresponding to the outer duct area and the equal principle of the residual gas system, so that fuel is supplied to the outer duct area separately through the fuel supply nozzle corresponding to the rear duct ejector, thereby making full use of the oxygen-rich air in the outer duct area, and improving the overall combustion efficiency of the afterburner and the outlet temperature of the afterburner at the same time. Among them, the specific method of calculating the target fuel supply amount corresponding to the outer duct area according to the outer duct oxygen flow can refer to the implementation method in the relevant technology, and the present disclosure does not make specific limitations on this.

[0069] For any support plate partition, the target fuel supply corresponding to the support plate partition can be determined based on the partition oxygen flow corresponding to the support plate partition and the principle of equal residual gas system, so as to supply fuel to the support plate partition, thereby increasing the mixing degree of air and fuel in the inner area by performing fuel-oxygen matching for each support plate partition, thereby increasing the oxygen utilization rate, improving the overall combustion efficiency of the afterburner, and the outlet temperature of the afterburner. The specific method of calculating the target fuel supply corresponding to any support plate partition according to the partition oxygen flow corresponding to the support plate partition can refer to the implementation method in the relevant technology, and the present disclosure does not make specific limitations on this.

[0070] In one possible implementation, the plurality of support plate partitions include at least one support plate outer zone and at least one support plate inner zone, wherein the support plate outer zone represents the support plate partition close to the outer duct area, and the support plate inner zone represents the support plate partition far from the outer duct area; according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area, the target fuel supply amount corresponding to each fuel supply area is determined, including: when the fuel supply mode indicates that the outer duct area is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, according to the outer duct oxygen flow rate corresponding to the outer duct area and the partition oxygen flow rate corresponding to each support plate outer zone, the target fuel supply amount corresponding to each support plate outer zone is determined respectively; according to the partition oxygen flow rate corresponding to each support plate inner zone, the target fuel supply amount corresponding to each support plate inner zone is determined respectively.

[0071] According to the positional relationship between each support plate partition and the outer containment area, the support plate partition can be divided into a support plate outer area close to the outer containment area and a support plate inner area far from the outer containment area. The specific method of dividing the support plate outer area and the support plate inner area can be flexibly set according to actual use requirements, and this disclosure does not make specific limitations on this.

[0072] In one example, the support plate partitions adjacent to the outer containment area may be simply determined as support plate outer areas, and all support plate partitions not adjacent to the outer containment area may be determined as support plate inner areas.

[0073] With the above Figure 2 For example, Figure 2 As shown, the support plate partition 2021 adjacent to the outer containment area 201 is the support plate outer area, and the support plate partition 2022 not adjacent to the outer containment area 201 (with the support plate partition 2021 in between) is the support plate inner area.

[0074] In one example, the support plate partition whose distance from the outer region meets the preset threshold can be determined as the support plate outer region, and the support plate partition whose distance from the outer region does not meet the preset threshold can be determined as the support plate outer region. The specific value of the preset threshold can be flexibly set according to actual use requirements, and the present disclosure does not make specific limitations on this.

[0075] When the fuel supply mode indicates that the outer duct area is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the outer duct oxygen flow corresponding to the outer duct area can be added to the fuel-oxygen matching for each support plate outer area, so as to adaptively increase the target fuel supply corresponding to each support plate outer area, so that the combustion process can make use of the oxygen-rich air in the outer duct area as much as possible. According to the outer duct oxygen flow corresponding to the outer duct area and the zone oxygen flow corresponding to each support plate outer area, the specific method of determining the target fuel supply corresponding to each support plate outer area can be flexibly set according to actual use requirements and depends on the actual number of support plate outer areas, which is not specifically limited in the present disclosure.

[0076] In one example, the afterburner is divided into a support plate outer area and a support plate inner area by only one support plate. When the fuel supply mode indicates that the outer duct area is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the outer duct oxygen flow corresponding to the outer duct area and the partition oxygen flow corresponding to the support plate outer area can be directly summed, and according to the summation result and based on the principle of equal residual gas system, the target fuel supply corresponding to the support plate outer area is determined.

[0077] In one example, the afterburner divides its inner region into multiple outer regions of the support plate and multiple inner regions of the support plate through multiple support plates. When the fuel supply mode indicates that the outer region of the support plate is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, it can be considered that the air input from the outer region of the support plate is evenly distributed in each outer region of the support plate; therefore, based on the number of outer regions of the support plate, the outer oxygen flow corresponding to the outer region of the support plate can be averaged to determine the oxygen flow input from the outer region of the support plate to each outer region of the support plate. For any outer region of the support plate, the oxygen flow input from the outer region of the support plate to each outer region of the support plate and the partition oxygen flow corresponding to the outer region of the support plate can be summed, and the target fuel supply corresponding to the outer region of the support plate can be determined based on the summation result and the principle of equality of the residual gas system.

[0078] In one example, the afterburner divides its inner area into multiple outer support areas and multiple inner support areas through multiple support plates. When the fuel supply mode indicates that the outer support area is not supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the weight corresponding to each outer support area can be determined based on the partitioned effective flow area corresponding to each outer support area and the total effective flow area corresponding to the inner support area, and the outer support oxygen flow rate is allocated according to the weight corresponding to each outer support area to determine the oxygen flow rate input from the outer support area to each outer support area. For any outer support area, the oxygen flow rate input from the outer support area to each outer support area and the partitioned oxygen flow rate corresponding to the outer support area can be summed, and the target fuel supply corresponding to the outer support area can be determined based on the summation result and the principle of equal residual gas system.

[0079] For any inner area of ​​the support plate, the influence of the air input from the outer area on the inner area of ​​the support plate can be ignored, and the target fuel supply corresponding to the inner area of ​​the support plate can be determined directly according to the partitioned oxygen flow corresponding to the inner area of ​​the support plate.

[0080] In one possible implementation, a target oil circuit control scheme corresponding to each oil supply area is determined according to a target oil supply amount corresponding to each oil supply area, including: when the oil supply mode indicates that the outer duct area is supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, an initial oil circuit control scheme corresponding to the outer duct area is determined according to a preset engine operating state and a target oil supply amount corresponding to the outer duct area; according to multiple target engine operating states, the initial oil circuit control scheme corresponding to the outer duct area is iteratively optimized to determine the target oil circuit control scheme corresponding to the outer duct area; for any support plate partition, the initial oil circuit control scheme corresponding to the support plate partition is determined according to a preset engine operating state and the target oil supply amount corresponding to the support plate partition; according to multiple target engine operating states, the initial oil circuit control scheme corresponding to the outer duct area and each support plate partition is iteratively optimized to determine the target oil circuit control scheme corresponding to the outer duct area and each support plate partition.

[0081] The specific content of the preset engine operating state here can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations on this.

[0082] When the fuel supply mode indicates that fuel is supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, the initial fuel circuit control scheme corresponding to the outer duct area can be determined according to the preset engine working state and the target fuel supply amount corresponding to the outer duct area; wherein the specific content of the initial fuel circuit control scheme corresponding to the outer duct area can be flexibly set according to actual usage requirements, usually including the fuel supply parameters corresponding to the outer duct fuel supply nozzle, for example, the number of injections, the single injection time, the single injection amount, etc., and the present disclosure does not make specific limitations on this.

[0083] In order to further improve the versatility and reliability of the oil circuit control scheme, after determining the initial oil circuit control scheme, multiple different target engine operating states can be designed in combination with actual usage requirements, and the initial oil circuit control scheme corresponding to the outer circumference area can be iteratively optimized until the fuel supply requirements for oxygen-enriched air input to the outer circumference area under each target engine operating state are met, and the target oil circuit control scheme corresponding to the outer circumference area is determined. Among them, the specific content of any target engine operating state can be flexibly set according to actual usage requirements, and this disclosure does not make specific limitations on this.

[0084] Similarly, for any support plate partition, the initial oil circuit control scheme corresponding to the support plate partition can be determined based on the preset engine operating state and the target oil supply corresponding to the support plate partition; and combined with multiple target engine operating states, the initial oil circuit control scheme corresponding to the support plate partition is iteratively optimized to determine the target oil circuit control scheme corresponding to each support plate partition. Among them, the specific content of the initial oil circuit control scheme corresponding to any support plate partition can be flexibly set according to actual usage requirements, usually including the number of oil supply nozzles on the oil supply branch corresponding to the support plate partition, the spacing between adjacent oil supply nozzles, the oil supply parameters corresponding to each oil supply nozzle, etc., and the present disclosure does not make specific limitations on this. It should be noted that the process of iteratively optimizing the initial oil circuit control scheme corresponding to the outer area and each support plate partition is carried out simultaneously.

[0085] Through the above process, the accuracy and reliability of the target oil circuit control scheme corresponding to each fuel supply area can be improved, and the adaptability of the target oil circuit control scheme to different engine operating conditions can be improved, ensuring that under wide bypass ratio operation, the afterburner has good oil-gas matching ability and higher combustion performance within the full envelope fuel supply law range composed of the target oil circuit control scheme.

[0086] In one possible implementation, a target oil circuit control scheme corresponding to each oil supply area is determined according to a target oil supply amount corresponding to each oil supply area, including: when the oil supply mode indicates that the outer duct area is not supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, for any support plate partition, according to a preset engine operating state and the target oil supply amount corresponding to the support plate partition, an initial oil circuit control scheme corresponding to the support plate partition is determined; according to multiple target engine operating states, the initial oil circuit control scheme corresponding to each support plate partition is iteratively optimized to determine the target oil circuit control scheme corresponding to each support plate partition.

[0087] When the oil supply mode indicates that oil is not supplied to the outer duct area through the oil supply nozzle corresponding to the rear duct ejector, it is only necessary to carry out the aforementioned oil circuit control scheme design scheme for each support plate partition and determine the target oil circuit control scheme corresponding to each support plate partition.

[0088] In one possible implementation, the method further includes: determining a full-envelope fuel supply law based on a target oil circuit control scheme corresponding to each fuel supply area, wherein the full-envelope fuel supply law is used to simulate the oil circuit control scheme corresponding to any fuel supply area under any engine operating state; determining performance parameters of an aircraft engine including an afterburner under different engine operating states based on the full-envelope fuel supply law; and for any engine operating state, adjusting the target oil circuit control scheme corresponding to at least one fuel supply area based on the performance parameters corresponding to the aircraft engine under the engine operating state, and determining an adjusted oil circuit control scheme corresponding to the fuel supply area.

[0089] According to the target oil circuit control scheme corresponding to each oil supply area, the full envelope oil supply law can be determined to simulate the oil circuit control scheme corresponding to any oil supply area under any engine working state. Among them, the specific method of determining the full envelope oil supply law can refer to the implementation method in the relevant technology, and this disclosure does not make specific restrictions on this; the specific form of the full envelope oil supply law can be flexibly set by referring to the form of the flight envelope in the prior art, and this disclosure does not make specific restrictions on this.

[0090] For any engine operating state, the performance parameters of the aircraft engine in the engine operating state can be determined according to the full envelope fuel supply law, which serves as a basis for performance evaluation of the aircraft engine. The specific content of the performance parameters of the aircraft engine in any engine operating state can be flexibly set according to actual usage requirements, and this disclosure does not make specific limitations on this.

[0091] In one example, the performance parameters of an aircraft engine in any engine operating state may include the residual gas coefficient corresponding to each fuel supply area in the engine operating state, as well as the fuel concentration field distribution, the temperature field in the full afterburner state, the outlet temperature corresponding to the afterburner combustion chamber, etc. The specific method for determining the above parameters can refer to the implementation methods in the relevant technology, and the present disclosure does not make specific limitations on this.

[0092] For any engine operating state, according to the corresponding performance parameters of the aircraft engine in the engine operating state, the target oil circuit control scheme corresponding to at least one oil supply area can be adjusted to determine the adjusted oil circuit control scheme corresponding to the oil supply area. Specifically, when there is at least one indicator in the performance parameters corresponding to the aircraft engine in the engine operating state that does not meet the preset performance indicator requirements and / or component cooling requirements, the target oil circuit control scheme can be adjusted so that the adjusted oil circuit control scheme can enable the indicator to meet the performance indicator requirements and / or component cooling requirements. The specific content of the performance indicator requirements and component cooling requirements here can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations.

[0093] In the disclosed embodiment, the afterburner is divided into an outer duct area including the afterburner, and a plurality of support plate partitioned fuel supply areas of the inner duct area of ​​the afterburner, wherein the outer duct area includes a rear duct ejector for connecting the outer duct area and the combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle, and the angle between the fuel injection direction of the fuel supply nozzle and the air flow direction at the inlet of the rear duct ejector satisfies greater than or equal to 0° and less than or equal to 180, the real-time opening of the rear duct ejector is adjusted to adjust the flow rate of air from the outer duct area into the combustion area in the afterburner, and the plurality of support plate partitions are obtained by dividing the inner duct area, and the outer duct area and the fuel supply oil path of each support plate partition can be designed in a targeted manner, so as to facilitate the subsequent separate fuel supply to the outer duct area by using the rear duct ejector to spray fuel, and the support plate partitioning planning of the inner duct area, so as to comprehensively improve the fuel-oxygen matching accuracy and the oil-gas mixing effect, thereby improving the overall combustion efficiency of the afterburner. According to the real-time bypass ratio of the afterburner, the fuel supply mode corresponding to the afterburner can be determined to indicate whether to supply fuel to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, so as to adapt the fuel supply scheme to the real-time adjustment changes of the rear duct ejector, so that the afterburner can flexibly adjust the fuel supply mode according to the changes in the bypass ratio, thereby improving the adaptability of the afterburner to different bypass ratio operating conditions and transition states within a wide bypass ratio range. By determining the real-time oxygen flow rate corresponding to each fuel supply area respectively, and combining it with the fuel supply mode, the target fuel supply corresponding to each fuel supply area can be determined, so as to achieve fuel-oxygen matching for each fuel supply area, and improve the accuracy of the target fuel supply corresponding to each fuel supply area, thereby reducing the possibility of insufficient fuel combustion and avoiding fuel waste while making full use of the oxygen in each fuel supply area; according to the target fuel supply corresponding to each fuel supply area, the target oil circuit control scheme corresponding to each fuel supply area is determined to accurately control the fuel injection amount of the fuel supply branch corresponding to each fuel supply area, so as to ensure that the fuel and oxygen can be fully mixed and burned, improve the overall combustion efficiency of the afterburner in the large bypass ratio condition and the transition state, and the outlet temperature of the afterburner, thereby achieving the effect of increasing the thrust of the aircraft engine.

[0094] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method for supplying fuel to afterburner chamber zones based on rear duct ejector fuel injection, characterized in that: include: According to the real-time bypass ratio of the afterburner, a fuel supply mode corresponding to the afterburner is determined, wherein the afterburner includes a plurality of fuel supply areas, the plurality of fuel supply areas include an outer bypass area of ​​the afterburner, and a plurality of support plate partitions included in an inner bypass area of ​​the afterburner, the outer bypass area includes a rear duct ejector for connecting the outer bypass area and a combustion area in the afterburner, and the rear duct ejector is provided with a corresponding fuel supply nozzle, and the angle between the fuel injection direction of the fuel supply nozzle and the air flow direction at the inlet of the rear duct ejector satisfies a value greater than or equal to 0° and less than or equal to 180, the real-time opening of the rear duct ejector is adjusted to adjust the flow rate of air from the outer bypass area into the combustion area in the afterburner, the plurality of support plate partitions are obtained by dividing the inner bypass area, and the fuel supply mode is used to indicate whether the outer bypass area is supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector; Determine the real-time oxygen flow rate corresponding to each fuel supply area respectively; Determine a target fuel supply amount corresponding to each fuel supply area according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area; According to the target fuel supply amount corresponding to each fuel supply area, the target oil circuit control scheme corresponding to each fuel supply area is determined, wherein the target oil circuit control scheme corresponding to any fuel supply area is used to control the fuel injection amount of the fuel supply branch corresponding to the fuel supply area.

2. The method according to claim 1, characterized in that The step of respectively determining the real-time oxygen flow rate corresponding to each oil supply area includes: Determine the outer duct oxygen flow rate corresponding to the outer duct area according to the real-time outer duct air flow rate corresponding to the outer duct area, wherein the real-time outer duct air flow rate represents the flow rate of air entering the combustion area in the afterburner from the outer duct area through the rear duct ejector; For any support plate partition, the partition oxygen flow corresponding to the support plate partition is determined according to the total effective flow area corresponding to the connotation area and the partition effective flow area corresponding to the support plate partition.

3. The method according to claim 2, characterized in that Determining the target fuel supply amount corresponding to each fuel supply area according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area includes: When the oil supply mode indicates that the oil supply nozzle corresponding to the rear duct ejector is used to supply oil to the outer duct area, a target oil supply amount corresponding to the outer duct area is determined according to the outer duct oxygen flow rate corresponding to the outer duct area; According to the partition oxygen flow corresponding to each support plate partition, the target oil supply corresponding to each support plate partition is determined respectively.

4. The method according to claim 2, characterized in that: The plurality of support plate partitions include at least one support plate outer zone and at least one support plate inner zone, wherein the support plate outer zone represents a support plate partition close to the outer containment area, and the support plate inner zone represents a support plate partition far from the outer containment area; Determining the target fuel supply amount corresponding to each fuel supply area according to the fuel supply mode and the real-time oxygen flow rate corresponding to each fuel supply area includes: When the oil supply mode indicates that the outer duct area is not supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, the target oil supply amount corresponding to each support plate outer area is determined according to the outer duct oxygen flow corresponding to the outer duct area and the zone oxygen flow corresponding to each support plate outer area; According to the zoned oxygen flow corresponding to each inner zone of the support plate, the target oil supply corresponding to each inner zone of the support plate is determined respectively.

5. The method according to any one of claims 1 to 4, characterized in that: Determining the target oil circuit control scheme corresponding to each oil supply area according to the target oil supply amount corresponding to each oil supply area includes: When the oil supply mode indicates that the outer duct area is supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, an initial oil circuit control scheme corresponding to the outer duct area is determined according to a preset engine working state and a target oil supply amount corresponding to the outer duct area; For any support plate partition, determine the initial oil circuit control scheme corresponding to the support plate partition according to the preset engine working state and the target oil supply corresponding to the support plate partition; According to a plurality of target engine operating states, the initial oil circuit control schemes corresponding to the outer circumference area and each support plate partition are iteratively optimized to determine the target oil circuit control schemes corresponding to the outer circumference area and each support plate partition.

6. The method according to any one of claims 1 to 4, characterized in that Determining the target oil circuit control scheme corresponding to each oil supply area according to the target oil supply amount corresponding to each oil supply area includes: When the oil supply mode indicates that the outer duct area is not supplied with oil through the oil supply nozzle corresponding to the rear duct ejector, for any support plate partition, an initial oil circuit control scheme corresponding to the support plate partition is determined according to a preset engine working state and a target oil supply amount corresponding to the support plate partition; According to a plurality of target engine operating states, the initial oil circuit control scheme corresponding to each support plate partition is iteratively optimized to determine the target oil circuit control scheme corresponding to each support plate partition.

7. The method according to any one of claims 1 to 4, characterized in that The method further comprises: Determine the full envelope oil supply law according to the target oil circuit control scheme corresponding to each oil supply area, wherein the full envelope oil supply law is used to simulate the oil circuit control scheme corresponding to any oil supply area under any engine working state; Determining performance parameters of an aircraft engine including the afterburner under different engine operating conditions according to the full envelope fuel supply law; For any engine operating state, according to the performance parameters corresponding to the aircraft engine in the engine operating state, the target oil circuit control scheme corresponding to at least one oil supply area is adjusted to determine the adjusted oil circuit control scheme corresponding to the oil supply area.

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