A method for zoned fuel supply to afterburner based on rear duct ejector injection

Abstract

The present disclosure relates to a method for zoned fuel supply to an afterburner based on fuel injection from a rear duct ejector, comprising: determining the fuel supply mode corresponding to the afterburner according to the real-time bypass ratio of the afterburner; determining the real-time oxygen flow rate corresponding to each fuel supply 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; determining the target oil circuit control scheme corresponding to each fuel supply area according to the target fuel supply amount corresponding to each fuel supply area, 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. Through the embodiments of the present disclosure, the regulation changes of the rear duct ejector can be adapted by zoned matching fuel supply, and the outer duct area can be separately fueled based on the corresponding fuel nozzle, thereby fully utilizing the oxygen-enriched air input by the rear duct ejector and improving the combustion efficiency of the afterburner under various working conditions and transition states.

Description

Technical Field

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

[0002] Variable-cycle engines can alter engine cycle parameters and achieve thermodynamic cycles with different characteristics by adjusting the geometry, size, or position of certain engine components. In certain operating modes, adjusting the opening of the rear variable area bypass injector (RVABI) can change the air flow ratio between the internal and external bypasses of the variable-cycle engine, thereby enabling the afterburner to operate under wide-bypass ratio conditions. At this point, a large amount of low-temperature, oxygen-rich air from the external bypass can enter the afterburner through the RVABI, but it is difficult to mix and burn with the high-temperature, oil-rich gas from the internal bypass, resulting in a decrease in overall combustion efficiency and a difficulty in meeting the afterburner's outlet temperature 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 based on rear duct ejector fuel injection.

[0004] According to one aspect of the present disclosure, a method for zoned fuel supply to an afterburner based on fuel injection from a rear duct ejector is provided, 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 the fuel injection direction of the fuel supply nozzle and the air flow direction at the inlet of the rear duct ejector satisfies a requirement of being 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 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 corresponding to each fuel supply area is determined respectively; according to the fuel supply mode and the real-time oxygen flow corresponding to each fuel supply area, the target fuel supply corresponding to each fuel supply area is determined; 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, 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 based on 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 based on 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 one possible implementation, 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 supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the target fuel supply amount corresponding to the outer duct area is determined according to the outer duct oxygen flow rate corresponding to the outer duct area; and the target fuel supply amount corresponding to each support plate partition is determined according to the partition oxygen flow rate 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 away 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 one possible implementation, the target oil circuit control scheme corresponding to each oil supply area is determined according to the target oil supply quantity 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 the preset engine working state and the target oil supply quantity 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 quantity 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 based on 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 working 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 working 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 rule based on a target oil circuit control scheme corresponding to each fuel supply area, wherein the full-envelope fuel supply rule is used to simulate the oil circuit control scheme corresponding to any fuel supply area under any engine operating state; determining performance parameters of the aircraft engine including the afterburner under different engine operating states based on the full-envelope fuel supply rule; 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 this engine operating state, and determining the adjusted oil circuit control scheme corresponding to the fuel supply area.

[0011] In an embodiment of the present disclosure, 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 including 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 the requirement of being greater than or equal to 0° and less than or equal to 180. The flow rate of air entering the combustion area in the afterburner from the outer duct area is adjusted by adjusting the real-time opening of the rear duct ejector. The plurality of support plate partitions are obtained by dividing the inner duct area, and the outer duct area and the fuel supply 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 corresponding fuel supply mode of the afterburner can be determined to indicate whether fuel is supplied 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 transition 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 zoned fuel supply based on rear duct ejector fuel injection according to an embodiment of the present disclosure is shown;

[0015] Figure 2 A schematic structural diagram of an afterburner chamber fueled by a rear duct ejector 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 indicated.

[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 simply describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of three situations: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0019] In addition, numerous specific details are provided in the following detailed description to better illustrate the present disclosure. Those skilled in the art will appreciate that the present disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of the present disclosure.

[0020] Variable cycle engines can alter engine cycle parameters by adjusting the geometry, size, or position of certain internal components. For example, by adjusting the opening of the rear variable area bypass injector (RVABI), these parameters can be used to achieve different thermodynamic cycles and switch the engine's operating mode. By switching the engine's operating mode, it can operate across a wide bypass ratio range, combining the low fuel consumption of a high-bypass-ratio turbofan engine at subsonic speeds with the high thrust of a low-bypass-ratio engine at supersonic speeds, enhancing the engine's adaptability to complex and changing missions.

[0021] Specifically, by adjusting the opening of the RVABI, the ratio of the air flow in the outer duct to the inner duct can be adjusted, allowing the afterburner to operate within a wide bypass ratio range. However, the traditional single afterburner fuel supply design is difficult to take into account different bypass ratio operating conditions, that is, it cannot guarantee that the fuel can be fully and efficiently burned under each different bypass ratio operating condition within the wide bypass ratio range, as well as in the transition state. Especially under high bypass ratio conditions, after a large amount of outer duct low-temperature oxygen-rich air enters the combustion chamber in the form of an induced airflow through the RVABI, 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. The outlet temperature of the afterburner is difficult to meet the engine operating requirements.

[0022] In view of this, the present disclosure provides a method for afterburner zoned fuel supply based on rear duct ejector injection, which can be applied to variable cycle engines 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 fueled by rear duct ejector injection under large bypass ratio conditions and transitional states, making full use of the oxygen-rich air input through the rear duct ejector, improving the overall combustion efficiency and outlet temperature of the afterburner, and increasing the thrust of the aircraft engine; and improving the adaptability of the afterburner to different bypass ratio conditions within a wide bypass ratio range, so that the afterburner can maintain good oil and gas matching under different bypass ratio conditions, ensuring that the aircraft engine can maintain high operating performance under different working conditions. The following is a detailed description of the afterburner zoned fuel supply method based on rear duct ejector injection disclosed in the present disclosure.

[0023] Figure 1 A flow chart of a method for zoning 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 zoning 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 zoning 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 zoning 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 compartment fuel supply method based on rear duct ejector injection includes:

[0024] In step S11, the fuel supply mode corresponding to the afterburner is determined based on the real-time bypass ratio of the afterburner, wherein the afterburner includes multiple fuel supply areas, the multiple fuel supply areas include an outer bypass area of ​​the afterburner, and multiple support plate partitions included in the 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 the requirement of being 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 multiple 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 chamber herein can be referenced to the afterburner chamber in a common variable cycle engine, which includes a rear duct ejector. Its internal area can be divided into a fuel supply area and a combustion area. The fuel supply area can include an outer duct area and an inner duct area of ​​the afterburner. The outer duct area is provided with a rear duct ejector, connecting the outer duct area with the combustion area within the afterburner. The rear duct ejector is also equipped 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 within the afterburner can be adjusted, thereby adjusting the real-time bypass ratio of the afterburner. The specific form of the rear duct ejector can be referenced to embodiments in the relevant art and is not specifically limited in this disclosure. The inner duct area can be divided into multiple support plate sections, the specific number of which can be flexibly set according to actual usage requirements and is not specifically limited in this disclosure. The specific form of the fuel supply nozzle corresponding to the rear duct ejector, as well as the corresponding nozzle parameters (such as nozzle diameter, nozzle flow rate, etc.), can be flexibly set according to actual usage requirements and are not specifically limited in this disclosure. In addition, the specific number of oil supply nozzles corresponding to the rear duct ejector can also be flexibly set according to actual usage requirements, and is at least one. This disclosure does not make specific restrictions 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. 1 shows a schematic structural diagram 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 the side cross-section of the afterburner. Figure 2 (b) in the figure shows the cross-section of the afterburner flow passage (including the inner and outer regions) perpendicular to the airflow. Figure 2 As shown in (a) of FIG, 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 ejection air. Figure 2 As shown in (b), the connotation area 202 is a support plate area provided with a vertical support plate 2023. The median of the vertical support plate 2023 (i.e., the dotted line in the figure) is used as the partition boundary to divide the support plate area into a support plate partition 2021 and a support plate partition 2022.

[0029] By adjusting the real-time opening of the rear ducted ejector, that is, changing the opening angle of the rear ducted ejector, the flow rate of the ejected airflow from the outer duct area into the combustion area within the afterburner can be adjusted, thereby changing the bypass ratio of the afterburner and enabling the afterburner to operate within a wide bypass ratio range. Accordingly, the real-time opening of the rear ducted ejector can be adjusted based on a preset target bypass ratio so that the real-time bypass ratio of the afterburner is equal to the target bypass ratio. The specific method for adjusting the real-time opening of the rear ducted ejector based on the preset target bypass ratio can be flexibly set according to actual usage requirements and is not specifically limited in this disclosure.

[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; and 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 of the rear duct ejector can be flexibly set according to actual usage requirements, and this 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 rate is less than the rated external air flow rate, the opening of the rear duct ejector is increased until the difference between the real-time external air flow rate and the rated external air flow rate meets the error threshold, thereby completing flow matching for the rear duct ejector. When the real-time external air flow rate is greater than the rated external air flow rate, the opening of the rear duct ejector is decreased until the difference between the real-time external air flow rate and the rated external air flow rate meets the error threshold, thereby completing flow matching for the rear duct ejector. The specific value of the error threshold can be flexibly set according to actual usage requirements and depends on the accuracy of the rear duct ejector, and this disclosure does not specifically limit this.

[0034] Based on the afterburner's real-time bypass ratio, the afterburner's current operating condition can be determined, and the corresponding fuel supply mode for the afterburner can be adjusted accordingly. Specifically, if the real-time bypass ratio meets a preset bypass ratio threshold, the afterburner can be determined to be operating at a high bypass ratio. In this case, to improve the afterburner's ability to utilize the low-temperature, oxygen-rich air input to the outer shroud under high bypass ratio conditions, thereby increasing combustion efficiency and the afterburner's outlet temperature, fuel supply can be tailored to the outer shroud, with the fuel supply mode for the afterburner being determined to indicate that fuel is supplied to the outer shroud through the fuel nozzles corresponding to the aft duct ejectors. If the real-time bypass ratio does not meet the preset bypass ratio threshold, the afterburner can be determined to be operating at a low bypass ratio. At this time, the outer shroud receives less low-temperature, oxygen-rich air. To prevent damage to the aft duct ejectors caused by fuel injection, fuel supply can be tailored to the multiple strut sections within the inner shroud, with the fuel supply mode for the afterburner being determined to indicate that fuel is not supplied to the outer shroud through the fuel nozzles corresponding to the aft duct ejectors.

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

[0036] In one example, the bypass ratio threshold may be set to 0.3. When the real-time bypass ratio of the afterburner is greater than 0.3, it can be determined that the afterburner is in a high bypass ratio operating condition. When the real-time bypass ratio of the afterburner is less than or equal to 0.3, it can be determined that the afterburner is in a low bypass ratio operating 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 engine operation, the real-time oxygen flow rate corresponding to each fuel supply area can be monitored in real time for subsequent fuel-oxygen matching, thereby improving fuel supply accuracy. The specific method for determining the real-time oxygen flow rate corresponding to each fuel supply area can be flexibly configured based on actual usage requirements. For example, flow sensors can be installed in the outer area and in each support plate partition, and this disclosure does not impose 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 separately, and the target fuel supply corresponding to each fuel supply area can be determined to improve the accuracy of the fuel supply to each fuel supply area. In addition, the degree of mixing of fuel and air can be improved by zoned fuel supply, so that under any bypass ratio working condition, the afterburner can maintain a high combustion efficiency, ensuring that the engine can maintain high performance operation in various working modes.

[0043] The following text will describe in detail the process of determining the target fuel supply amount corresponding to each fuel supply area based on the fuel supply mode and the real-time oxygen flow corresponding to each fuel supply area in combination with possible implementation methods of the present disclosure, which will not be repeated 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] Each fuel supply area within the afterburner is provided with a corresponding fuel supply branch, which can supply fuel to that fuel supply area through a nozzle. The specific form of the fuel supply branch and the nozzle on the fuel supply branch can be referred to the embodiments in the relevant art and is not specifically limited in this disclosure.

[0046] The oil supply branch corresponding to the outer duct area, that is, the oil supply nozzle corresponding to the rear duct ejector, can be found in the previous description for its specific settings and will not be elaborated here.

[0047] In one possible implementation, the fuel supply branch corresponding to any support plate partition may be provided with multiple fuel supply nozzles, arranged radially along the vertical support plate within the inner region, with each support plate fuel supply nozzle spraying in a direction perpendicular to the vertical support plate within the inner region. The specific form of each fuel supply nozzle and the corresponding nozzle parameters (e.g., nozzle diameter, nozzle flow rate, etc.) for each support plate fuel supply nozzle can be referenced to embodiments in the related art and are not specifically limited in this disclosure.

[0048] The specific form of the fuel supply branch corresponding to each support plate partition can be flexibly configured according to actual usage requirements and is not specifically limited in this disclosure. It should be noted that, in general, 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) of FIG. 2 , a vertical spray bar 2024 is disposed within the inner region 202. Multiple fuel supply nozzles are provided on the spray bar 2024. The portion of the spray bar 2024 located within the support plate partition 2021 serves as the fuel supply branch corresponding to the support plate partition 2021; the portion of the spray bar 2024 located within the support plate partition 2022 serves as the fuel supply branch corresponding to the support plate partition 2022.

[0050] In one example, a corresponding oil spray rod may be separately provided for each support plate partition, and the oil 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, based on the target fuel supply volume corresponding to that fuel supply area, a target fuel circuit control scheme for that fuel supply area can be determined based on the principle of approximately equidistant arrangement, ensuring that the oxygen flow concentration within the control area corresponding to each fuel supply nozzle in that fuel supply area is approximately equal. This allows for precise fuel supply to that fuel supply area, fully utilizing the oxygen within that fuel supply area, and improving combustion performance. The target fuel circuit control scheme corresponding to any fuel supply area can be used to control the fuel injection volume of the fuel supply branch corresponding to that fuel supply area. The specific content of the target fuel circuit control scheme can be flexibly set based on the specific form of the fuel supply area and actual usage requirements, and this disclosure does not impose 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 ejector, such as fuel supply pressure, nozzle diameter, aspect ratio, number of injections, single injection time, single injection amount, etc.

[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 other contents.

[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. The present disclosure does not make specific limitations on this.

[0055] In an embodiment of the present disclosure, 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 including 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 the requirement of being greater than or equal to 0° and less than or equal to 180. The flow rate of air entering the combustion area in the afterburner from the outer duct area is adjusted by adjusting the real-time opening of the rear duct ejector. The plurality of support plate partitions are obtained by dividing the inner duct area, and the outer duct area and the fuel supply 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 corresponding fuel supply mode of 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, fuel-oxygen matching can be achieved for each fuel supply area, and the accuracy of the target fuel supply corresponding to each fuel supply area can be improved. While making full use of the oxygen in each fuel supply area, the possibility of insufficient fuel combustion is reduced to avoid 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, to ensure that the fuel and oxygen can be fully mixed and burned, to improve the overall combustion efficiency of the afterburner under large bypass ratio conditions and transition conditions, as well as 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 corresponding to each fuel supply area is determined separately, including: determining the outer duct oxygen flow corresponding to the outer duct area based on 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 based on 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 into 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 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; then for any branch plate partition in the connotation area, the partition oxygen flow corresponding to the branch plate partition can be determined based on 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 this disclosure does not make specific limitations on this.

[0064] In one example, a plane perpendicular to the support plate of any support plate partition can be used as a reference plane at the oil supply branch corresponding to that support plate partition. A reference cross-section of the inner region on this reference plane is then determined. The area of ​​the reference cross-section is the total effective flow area corresponding to the inner region. For any support plate partition, the boundary between that support plate partition and the adjacent support plate partition is used as the radial position for segmentation. Using the effective flow area equalization method, the reference cross-section is segmented by the radial positions to determine the effective flow area corresponding to that support plate partition.

[0065] The specific methods for determining the real-time external duct air flow rate and the real-time internal duct air flow rate can be referenced to the implementation methods in the related art. For example, the methods can be obtained by using flow monitoring devices installed at the rear duct ejector and at the entrance of the internal duct area, and this disclosure does not specifically limit 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 reference to the implementation methods in the prior art, and this disclosure does not specifically limit 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 amount corresponding to each fuel supply area is determined based on 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 supplied with fuel through the fuel supply nozzle corresponding to the rear duct ejector, the target fuel supply amount corresponding to the outer duct area is determined based on the outer duct oxygen flow rate corresponding to the outer duct area; and the target fuel supply amount corresponding to each support plate partition is determined separately based on the partition oxygen flow rate corresponding to each support plate partition.

[0068] When the fuel supply mode instructs the outer envelope to be supplied with fuel through the fuel supply nozzles corresponding to the rear duct ejectors, a target fuel supply amount for the outer envelope can be determined based on the outer envelope oxygen flow rate corresponding to the outer envelope, based on the principle of equal residual gas systems. Fuel can then be supplied to the outer envelope separately through the fuel supply nozzles corresponding to the rear duct ejectors, thereby fully utilizing the oxygen-rich air in the outer envelope and simultaneously improving the overall combustion efficiency of the afterburner and the afterburner outlet temperature. The specific method for calculating the target fuel supply amount for the outer envelope based on the outer envelope oxygen flow rate can be referenced to embodiments in the related art and is not specifically limited in this disclosure.

[0069] For any given support plate zone, a target fuel supply rate can be determined based on the corresponding zone oxygen flow rate and the principle of equal residual gas systems. Fuel supply is then determined for that zone. By performing fuel-oxygen matching for each support plate zone, the degree of air-fuel mixing within the zone is increased, thereby increasing oxygen utilization and improving the overall combustion efficiency and afterburner outlet temperature. The specific method for calculating the target fuel supply rate for any given support plate zone based on the corresponding zone oxygen flow rate can be found in related art implementations and is not specifically limited in this disclosure.

[0070] 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 away from the outer duct area; according to the fuel supply mode and the real-time oxygen flow corresponding to each fuel supply area, the target fuel supply 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, the target fuel supply corresponding to each support plate outer zone is determined according to the outer duct oxygen flow corresponding to the outer duct area and the partition oxygen flow corresponding to each support plate outer zone; according to the partition oxygen flow corresponding to each support plate inner zone, the target fuel supply corresponding to each support plate inner zone is determined.

[0071] Based on the positional relationship between each support plate partition and the outer containment area, the support plate partitions can be divided into an outer support plate area close to the outer containment area and an inner support plate area away from the outer containment area. The specific method of dividing the outer and inner support plate areas can be flexibly configured based on actual usage requirements and is not specifically limited in this disclosure.

[0072] In one example, the support plate partitions adjacent to the outer region can be simply determined as the support plate outer region, and all support plate partitions not adjacent to the outer region can be determined as the support plate inner region.

[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, a support plate partition whose distance from the outer region meets a preset threshold can be determined as a support plate outer region, while a support plate partition whose distance from the outer region does not meet the preset threshold can be determined as a support plate outer region. The specific value of the preset threshold can be flexibly set according to actual usage requirements and is not specifically limited in this disclosure.

[0075] When the fuel supply mode indicates that fuel is not supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, the outer duct oxygen flow rate corresponding to the outer duct area can be added to the fuel-oxygen matching for each outer duct area. This adaptively increases the target fuel supply rate for each outer duct area, allowing the combustion process to maximize utilization of the oxygen-enriched air in the outer duct area. The specific method for determining the target fuel supply rate for each outer duct area based on the outer duct oxygen flow rate corresponding to the outer duct area and the zone oxygen flow rate corresponding to each outer duct area can be flexibly set according to actual usage requirements and depends on the actual number of outer duct areas. This disclosure does not specifically limit this method.

[0076] In one example, the afterburner is divided into an outer strut zone and an inner strut zone by a single strut plate. If the fuel supply mode indicates that fuel is not supplied to the outer strut zone through the fuel supply nozzle corresponding to the rear duct ejector, the outer strut oxygen flow rate corresponding to the outer strut zone can be directly summed with the subzone oxygen flow rate corresponding to the strut outer zone. Based on the summation result and the principle of equal residual gas system, the target fuel supply rate for the outer strut zone can be determined.

[0077] In one example, the afterburner's inner region is divided into multiple outer strut zones and multiple inner strut zones via multiple strut plates. When the fuel supply mode indicates that fuel is not supplied to the outer strut zone via the fuel supply nozzle corresponding to the rear duct ejector, the air input from the outer strut zone can be assumed to be evenly distributed across each outer strut zone. Therefore, based on the number of outer strut zones, the outer strut oxygen flow rates corresponding to the outer strut zones can be averaged to determine the oxygen flow rate input from the outer strut zone to each outer strut zone. For any outer strut zone, the oxygen flow rate input from the outer strut zone to each outer strut zone and the oxygen flow rate corresponding to the corresponding zone can be summed. Based on the summed result and the principle of equal residual gas system, the target fuel supply corresponding to the outer strut zone can be determined.

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

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

[0080] In one possible implementation, a target oil circuit control scheme corresponding to each oil supply area is determined based on a target oil supply quantity 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 based on a preset engine operating state and the target oil supply quantity corresponding to the outer duct area; based on 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 based on the preset engine operating state and the target oil supply quantity corresponding to the support plate partition; based on 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 this 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, such as the number of injections, the time of a single injection, the amount of a single injection, etc., and the present disclosure does not make specific limitations on this.

[0083] 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 based on actual usage requirements. The initial oil circuit control scheme corresponding to the outer envelope region can be iteratively optimized until the fuel supply requirements for oxygen-enriched air input to the outer envelope region are met for each target engine operating state, and the target oil circuit control scheme corresponding to the outer envelope region is determined. The specific content of any target engine operating state can be flexibly set based on actual usage requirements and is not specifically limited in this disclosure.

[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 this disclosure does not make specific restrictions 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 combustion chamber has good oil-gas matching ability and high combustion performance within the full envelope fuel supply law range formed based on 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 based on a target oil supply amount corresponding to each oil supply area, including: 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, for any support plate partition, based on 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; based on 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 design the aforementioned oil circuit control 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 rule based on a target oil circuit control scheme corresponding to each fuel supply area, wherein the full-envelope fuel supply rule 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 rule; 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 the adjusted oil circuit control scheme corresponding to the fuel supply area.

[0089] Based on the target oil circuit control scheme corresponding to each oil supply area, a full envelope oil supply pattern can be determined to simulate the oil circuit control scheme corresponding to any oil supply area under any engine operating state. The specific method for determining the full envelope oil supply pattern can be referenced to implementations in related art and is not specifically limited in this disclosure. The specific form of the full envelope oil supply pattern can be flexibly set by reference to the flight envelope form in the prior art and is not specifically limited in this disclosure.

[0090] For any engine operating state, the full-envelope fueling pattern can be used to determine the aircraft engine's performance parameters for that operating state, serving as a basis for aircraft engine performance evaluation. The specific performance parameters for any engine operating state can be flexibly set based on actual usage requirements and are not specifically limited in this disclosure.

[0091] In one example, the performance parameters of an aircraft engine under any engine operating state may include the residual air coefficient corresponding to each fuel supply area under that engine operating state, as well as the fuel concentration field distribution, the temperature field under full afterburner, and the outlet temperature of the afterburner. The specific methods for determining the above parameters can be referenced to the embodiments in the relevant art, and this disclosure does not specifically limit them.

[0092] For any engine operating state, according to the performance parameters corresponding to the aircraft engine in this 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 this 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 needs, and this disclosure does not make specific limitations.

[0093] In an embodiment of the present disclosure, 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 including 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 the requirement of being greater than or equal to 0° and less than or equal to 180. The flow rate of air entering the combustion area in the afterburner from the outer duct area is adjusted by adjusting the real-time opening of the rear duct ejector. The plurality of support plate partitions are obtained by dividing the inner duct area, and the outer duct area and the fuel supply path of each support plate partition can be designed in a targeted manner 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, thereby comprehensively improving 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 corresponding fuel supply mode of 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, fuel-oxygen matching can be achieved for each fuel supply area, and the accuracy of the target fuel supply corresponding to each fuel supply area can be improved. While making full use of the oxygen in each fuel supply area, the possibility of insufficient fuel combustion is reduced to avoid 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, to ensure that the fuel and oxygen can be fully mixed and burned, to improve the overall combustion efficiency of the afterburner under large bypass ratio conditions and transition conditions, as well as the outlet temperature of the afterburner, thereby achieving the effect of increasing the thrust of the aircraft engine.

[0094] While various embodiments of the present disclosure have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for zoned fuel supply to an afterburner based on rear duct ejector 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 including 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 with 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 the requirement of being greater than or equal to 0° and less than or equal to 180, the flow rate of air from the outer bypass area into the combustion area in the afterburner is adjusted by adjusting the real-time opening of the rear duct ejector, 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; Determining 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 respectively determining the real-time oxygen flow corresponding to each oil supply area includes: determining an outer oxygen flow rate corresponding to the outer region according to a real-time outer air flow rate corresponding to the outer region, wherein the real-time outer air flow rate represents the flow rate of air entering the combustion region in the afterburner from the outer region through the rear duct ejector; For any support plate partition, the partition oxygen flow rate corresponding to the support plate partition is determined based on the total effective flow area corresponding to the inner region 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 fuel supply mode indicates that fuel is supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, a target fuel 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 zone oxygen flow corresponding to each support plate zone, the target oil supply corresponding to each support plate zone 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 fuel supply mode indicates that fuel is not supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, a target fuel supply amount corresponding to each support plate outer area is determined according to the outer duct oxygen flow rate corresponding to the outer duct area and the zone oxygen flow rate 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 The step of determining a 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 fuel supply mode indicates that fuel is supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, an initial fuel circuit control scheme corresponding to the outer duct area is determined according to a preset engine operating state and a target fuel 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 based on the preset engine operating 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 region and each support plate partition are iteratively optimized to determine target oil circuit control schemes corresponding to the outer region and each support plate partition.

6. The method according to any one of claims 1 to 4, characterized in that The step of determining a 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 fuel supply mode indicates that fuel is not supplied to the outer duct area through the fuel supply nozzle corresponding to the rear duct ejector, for any support plate partition, an initial fuel circuit control scheme corresponding to the support plate partition is determined according to a preset engine operating state and a target fuel supply amount corresponding to the support plate partition; 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.

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

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