Design evaluation method and device for fuel oil system and lubricating oil system of aero-engine

Abstract

The invention relates to a design evaluation method and device for a fuel oil system and a lubricating oil system of an aero-engine. The method comprises the following steps: acquiring system design parameters, system operation data and system coupling logic information of each system associated with a fuel oil system and a lubricating oil system, and operation associated information of an aero-engine, and constructing a system simulation model of each system; all the system simulation models are subjected to model association processing, a fuel oil and lubricating oil simulation model is obtained, the operation process of the fuel oil system and the operation process of the lubricating oil system are simulated through the fuel oil and lubricating oil simulation model, a simulation operation result is obtained, and abnormal information between the fuel oil system and the lubricating oil system is recognized through a performance evaluation strategy; and performing comprehensive evaluation on the fuel oil system and the lubricating oil system to obtain an evaluation result. By adopting the method, the comprehensiveness and accuracy of evaluation of the fuel oil system and the lubricating oil system can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of data generation, and particularly to a design evaluation method and device for an aero-engine fuel system and a lubricating oil system. Background Art

[0002] With the rapid development of the aero-engine industry, aero-engine simulation technology has been widely used in the research and development processes such as design optimization and fault troubleshooting. However, the co-simulation between relevant systems is not fully carried out. The fuel and lubricating oil systems are complex hydraulic systems with variable flow rate, variable load, and variable temperature, and the two exchange heat through a fuel / lubricating oil radiator. In the current design process, the coupled heat transfer between the fuel and lubricating oil systems is only simply estimated according to the rated value or using empirical data. With the improvement of aero-engine level, especially the advent of variable cycle engines, the temperatures of the fuel and lubricating oil systems are gradually increasing and have approached the limit value that can be used normally under certain working conditions. Therefore, it is necessary to conduct design evaluation on the fuel and lubricating oil systems under different operating conditions to assist the staff in optimizing and improving the fuel and lubricating oil systems.

[0003] The traditional design evaluation method for fuel and lubricating oil systems is to conduct design evaluation manually. During the evaluation, the analysis and research are carried out according to a single system. Only boundary conditions are set for the relevant systems, and a model is established to analyze and evaluate the fuel and lubricating oil systems. However, the single system has poor perception of the changes in the engine state, resulting in poor accuracy of the evaluation of the fuel and lubricating oil systems. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a design evaluation method, device, computer device, computer-readable storage medium, and computer program product for an aero-engine fuel system and a lubricating oil system.

[0005] In a first aspect, the present application provides a design evaluation method for an aero-engine fuel system and a lubricating oil system, including:

[0006] Obtain the system design parameters of each system associated with the fuel system and the lubricating oil system, the system operation data of each system, the system coupling logic information between each system, and the operation association information of the aero-engine, and construct a system simulation model for each system based on the system design parameters of each system and the system operation data of each system;

[0007] Based on the system coupling logic information between each system, perform model association processing on each system simulation model to obtain a fuel / lubricating oil simulation model, and generate a system simulation strategy for the fuel / lubricating oil simulation model based on the operation association information of the aero-engine;

[0008] Based on the system simulation strategy, through the fuel and lubricating oil simulation model, simulate the operation processes of the fuel system and the lubricating oil system to obtain simulation operation results, and based on the simulation operation results, through the performance evaluation strategy, identify the abnormal information between the fuel system and the lubricating oil system;

[0009] Based on the abnormal information between the fuel system and the lubricating oil system, through the system evaluation strategy, evaluate and process the fuel system and the lubricating oil system to obtain the design evaluation results of the fuel system and the lubricating oil system.

[0010] Optionally, constructing the system simulation models of the systems based on the system design parameters of the systems and the system operation data of the systems includes:

[0011] Obtain the system operation model of each system, and based on the system design parameters of each system, adjust the system operation model of each system to obtain the target system operation model of each system;

[0012] For each system, based on the system operation data of the system, through the system operation control algorithm of the system, calculate the system operation control parameters of the system, and based on the system operation control parameters of the system, adjust the target system operation model of the system to obtain the system simulation model of the system.

[0013] Optionally, performing model association processing on the system simulation models based on the system coupling logic information between the systems to obtain the fuel and lubricating oil simulation model includes:

[0014] Based on the system coupling logic information between the systems, identify the data coupling methods and the data interaction methods between the systems;

[0015] Based on the data coupling methods and the data interaction methods between the systems, generate the data interaction instruction generation logics between the systems, and based on the data interaction instruction generation logics between the systems, splice the system simulation models of the systems to obtain the fuel and lubricating oil simulation model.

[0016] Optionally, generating the system simulation strategy of the fuel and lubricating oil simulation model based on the operation correlation information of the aero-engine includes:

[0017] Based on the operation correlation information, identify the environmental data of the aero-engine under each operation condition and the control instruction information of each operation condition;

[0018] Based on the environmental data of the operating conditions, identify the environmental parameters of each environmental type of the operating conditions, and based on the control instruction information of each operating condition, identify the sub-control instructions of each system corresponding to each operating condition;

[0019] Take the environmental parameters of each environmental type of each operating condition and the sub-control instructions of each system corresponding to each operating condition as the system simulation strategy of the fuel and lubricating oil simulation model.

[0020] Optionally, based on the system simulation strategy, through the fuel and lubricating oil simulation model, simulate the operation processes of the fuel system and the lubricating oil system to obtain simulation operation results, including:

[0021] For each operating condition, based on the environmental parameters of each environmental type of the operating condition, adjust the system environmental parameters of the fuel and lubricating oil simulation model to obtain the target fuel and lubricating oil simulation model corresponding to the operating condition;

[0022] Based on the target fuel and lubricating oil simulation model, through the sub-control instructions of each system corresponding to the operating condition, simulate the operation processes of the fuel system and the lubricating oil system to obtain the simulation operation data of each system corresponding to the operating condition, and take the simulation operation data of all systems as the simulation operation results.

[0023] Optionally, the performance evaluation strategy includes the sub-performance evaluation strategies of each system. Based on the simulation operation results, through the performance evaluation strategy, identify the abnormal information between the fuel system and the lubricating oil system, including:

[0024] For each operating condition, based on the simulation operation data of each system corresponding to the operating condition, through the sub-performance evaluation strategies of each system, identify the system performance data of each system;

[0025] Based on the system performance data of each system, identify the abnormal performance information of each system, and take the abnormal performance information of all systems as the sub-abnormal performance information of the operating condition;

[0026] Take the sub-abnormal performance information of all operating conditions as the abnormal information between the fuel system and the lubricating oil system.

[0027] In a second aspect, the present application also provides a design evaluation device for an aeroengine fuel system and lubricating oil system, including:

[0028] An acquisition module, configured to acquire the system design parameters of each system associated with the fuel system and the lubricating oil system, the system operation data of each of the systems, the system coupling logic information between each of the systems, and the operation association information of the aero-engine, and construct a system simulation model for each of the systems based on the system design parameters of each of the systems and the system operation data of each of the systems;

[0029] A generation module, configured to perform model association processing on each of the system simulation models based on the system coupling logic information between each of the systems to obtain a fuel-lubricating oil simulation model, and generate a system simulation strategy for the fuel-lubricating oil simulation model based on the operation association information of the aero-engine;

[0030] An identification module, configured to simulate the operation processes of the fuel system and the lubricating oil system through the fuel-lubricating oil simulation model based on the system simulation strategy to obtain a simulation operation result, and identify abnormal information between the fuel system and the lubricating oil system through a performance evaluation strategy based on the simulation operation result;

[0031] An evaluation module, configured to perform an evaluation process on the fuel system and the lubricating oil system through a system evaluation strategy based on the abnormal information between the fuel system and the lubricating oil system to obtain a design evaluation result of the fuel system and the lubricating oil system.

[0032] Optionally, the acquisition module is specifically configured to:

[0033] Acquire the system operation model of each system, and adjust the system operation model of each system based on the system design parameters of each system to obtain the target system operation model of each system;

[0034] For each system, calculate the system operation control parameters of the system through the system operation control algorithm of the system based on the system operation data of the system, and adjust the target system operation model of the system based on the system operation control parameters of the system to obtain the system simulation model of the system.

[0035] Optionally, the generation module is specifically configured to:

[0036] Identify the data coupling method and the data interaction method between each of the systems based on the system coupling logic information between each of the systems;

[0037] Generate the data interaction instruction generation logic between each of the systems based on the data coupling method and the data interaction method between each of the systems, and splice the system simulation models of each of the systems based on the data interaction instruction generation logic between each of the systems to obtain a fuel-lubricating oil simulation model.

[0038] Optionally, the generating module is specifically configured to:

[0039] Based on the operation association information, identify the environmental data of the aero-engine under each operating condition and the control instruction information of each operating condition;

[0040] Based on the environmental data of the operating condition, identify the environmental parameters of each environmental type of the operating condition, and based on the control instruction information of each operating condition, identify the sub-control instructions of each system corresponding to each operating condition;

[0041] Use the environmental parameters of each environmental type of each operating condition and the sub-control instructions of each system corresponding to each operating condition as the system simulation strategy of the fuel and lubricating oil simulation model.

[0042] Optionally, the identifying module is specifically configured to:

[0043] For each operating condition, based on the environmental parameters of each environmental type of the operating condition, adjust the system environmental parameters of the fuel and lubricating oil simulation model to obtain the target fuel and lubricating oil simulation model corresponding to the operating condition;

[0044] Based on the target fuel and lubricating oil simulation model, through the sub-control instructions of each system corresponding to the operating condition, simulate the operation processes of the fuel system and the lubricating oil system to obtain the simulation operation data of each system corresponding to the operating condition, and use the simulation operation data of all systems as the simulation operation result.

[0045] Optionally, the identifying module is specifically configured to:

[0046] For each operating condition, based on the simulation operation data of each system corresponding to the operating condition, identify the system performance data of each system through the sub-performance evaluation strategies of each system;

[0047] Based on the system performance data of each system, identify the abnormal performance information of each system, and use the abnormal performance information of all systems as the sub-abnormal performance information of the operating condition;

[0048] Use the sub-abnormal performance information of all operating conditions as the abnormal information between the fuel system and the lubricating oil system.

[0049] In a third aspect, the present application provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the method described in any one of the first aspects are implemented.

[0050] Fourthly, the present application provides a computer-readable storage medium. A computer program is stored thereon, and when the computer program is executed by a processor, the steps of the method according to any one of the first aspects are implemented.

[0051] Fifthly, the present application provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the method according to any one of the first aspects are implemented.

[0052] The above design evaluation method and device for the aero-engine fuel system and lubricating oil system obtain the system design parameters of each system associated with the fuel system and the lubricating oil system, the system operation data of each of the systems, the system coupling logic information between each of the systems, and the operation association information of the aero-engine, and construct system simulation models for each of the systems based on the system design parameters of each of the systems and the system operation data of each of the systems; based on the system coupling logic information between each of the systems, perform model association processing on each of the system simulation models to obtain a fuel-lubricating oil simulation model, and generate a system simulation strategy for the fuel-lubricating oil simulation model based on the operation association information of the aero-engine; based on the system simulation strategy, simulate the operation processes of the fuel system and the lubricating oil system through the fuel-lubricating oil simulation model to obtain simulation operation results, and identify abnormal information between the fuel system and the lubricating oil system through a performance evaluation strategy based on the simulation operation results; based on the abnormal information between the fuel system and the lubricating oil system, perform evaluation processing on the fuel system and the lubricating oil system through a system evaluation strategy to obtain the design evaluation results of the fuel system and the lubricating oil system. In this solution, by combining the fuel system, the lubricating oil system, and each system associated therewith, a fuel-lubricating oil joint simulation model of the aero-engine is established, so that during the simulation of the operation processes of the fuel system and the lubricating oil system, the simulated results are closer to the actual operation results, avoiding the problem that a single system has a poor perception of changes in the engine state, thereby affecting the practicality of the simulation. Then, in this solution, by combining the above systems, the performance of the simulation operation results is evaluated according to different operating conditions, so as to obtain the design evaluation results of the fuel system and the lubricating oil system of the aero-engine, so that the evaluated results include the evaluation information of the fuel system and the lubricating oil system under different operating industrial controls, improving the comprehensiveness and accuracy of the evaluation of the fuel system and the lubricating oil system. Description of the Drawings

[0053] To more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0054] Figure 1 It is a schematic flowchart of a design evaluation method for an aeroengine fuel system and lubricating oil system in an embodiment;

[0055] Figure 2 It is a schematic diagram of the model operation structure of a fuel-lubricating oil simulation model in an embodiment;

[0056] Figure 3 It is a schematic diagram of the structure principle of a fuel system in an embodiment;

[0057] Figure 4 It is a schematic diagram of the structure principle of a lubricating oil system in an embodiment;

[0058] Figure 5 It is a schematic diagram of the model circuit structure of a fuel-lubricating oil simulation model in an embodiment;

[0059] Figure 6 It is a schematic flowchart of a design evaluation example for an aeroengine fuel system and lubricating oil system in an embodiment;

[0060] Figure 7 It is a structural block diagram of a design evaluation device for an aeroengine fuel system and lubricating oil system in an embodiment;

[0061] Figure 8 It is an internal structure diagram of a computer device in an embodiment. Detailed implementation manners

[0062] In order to make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the following further details the present application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0063] The design evaluation method for the aero-engine fuel system and lubricating oil system provided by the embodiments of the present application can be applied to the application environment of the design evaluation of the aero-engine fuel system and lubricating oil system. Among them, this method can be applied to a terminal, a server, or a system including a terminal and a server, and is realized through the interaction between the terminal and the server. Among them, the terminal can be, but is not limited to, various personal computers, laptop computers, medium-sized computers, etc. The terminal combines the fuel system, the lubricating oil system, and the systems associated with both to establish a combined fuel and lubricating oil simulation model of the aero-engine, so that during the simulation of the operation of the fuel system and the lubricating oil system, the simulated results are closer to the actual operation results, avoiding the problem that a single system has poor perception of changes in the engine state, thus affecting the practicality of the simulation. Then, this solution combines the above systems to evaluate the performance of the simulated operation results under different operating conditions, so as to obtain the design evaluation results of the fuel system and the lubricating oil system of the aero-engine, making the evaluated results include the evaluation information of the fuel system and the lubricating oil system under different operating conditions, and improving the comprehensiveness and accuracy of the evaluation.

[0064] In an exemplary embodiment, as Figure 1 shown, a design evaluation method for the aero-engine fuel system and lubricating oil system is provided. Taking the application of this method to a terminal as an example, it includes the following steps S101 to S104. Among them:

[0065] Step S101, obtain the system design parameters of the systems associated with the fuel system and the lubricating oil system, the system operation data of each system, the system coupling logic information between the systems, and the operation association information of the aero-engine, and construct a system simulation model of each system based on the system design parameters of each system and the system operation data of each system.

[0066] In this embodiment, the terminal responds to the information uploading operation of the staff and obtains the system design parameters of each system associated with the fuel system and the lubricating oil system, the system operation data of each system, the system coupling logic information between each system, and the operation association information of the aero-engine. Among them, each system includes, but is not limited to, the fuel system, the lubricating oil system, the fuel / lubricating oil radiator system, the air system, the control system, and the transmission system, etc. And the system design parameters of each system are the structural parameters and operation control parameters of each system designed by the staff. The system operation data of each system is the operation instructions of each system during the operation of the aero-engine. The system coupling logic information between each system is used to characterize the data interaction logic when the data between each system is interacted. The operation association information of the aero-engine is the environmental data of the aero-engine under each operation condition and the control instruction information of each system for each operation condition. Finally, the terminal constructs a system simulation model of each system based on the system design parameters of each system and the system operation data of each system. Among them, the system simulation model is a combined transient simulation model obtained by splicing the transient models of each system. The transient models of each system include, but are not limited to, the engine performance transient model, the control system model, the fuel system model, the air system model, the transmission system model, the bearing chamber model, the lubricating oil system model, etc. The specific construction process will be described in detail later.

[0067] Step S102: Based on the system coupling logic information between each system, perform model association processing on each system simulation model to obtain a fuel / lubricating oil simulation model, and generate a system simulation strategy for the fuel / lubricating oil simulation model based on the operation association information of the aero-engine.

[0068] In this embodiment, the terminal performs model association processing on each system simulation model based on the system coupling logic information between each system to obtain a fuel / lubricating oil simulation model, and generates a system simulation strategy for the fuel / lubricating oil simulation model based on the operation association information of the aero-engine. Among them, the system simulation strategy of the fuel / lubricating oil simulation model includes the environmental parameters of each environmental type of the aero-engine under different operation conditions and the sub-control instructions of each system corresponding to each operation condition. The specific generation process will be described in detail later.

[0069] Step S103: Based on the system simulation strategy, simulate the operation process of the fuel system and the lubricating oil system through the fuel / lubricating oil simulation model to obtain a simulation operation result, and identify the abnormal information between the fuel system and the lubricating oil system through the performance evaluation strategy based on the simulation operation result.

[0070] In this embodiment, the terminal, based on the system simulation strategy, simulates the operation processes of the fuel system and the lubricating oil system through the fuel-lubricating oil simulation model to obtain the simulation operation results, and based on the simulation operation results, identifies the abnormal information between the fuel system and the lubricating oil system through the performance evaluation strategy. Among them, the performance evaluation strategy includes sub-evaluation strategies for each system, which are used to comprehensively evaluate various parameters and operation performances of each system. The specific evaluation process will be described in detail later.

[0071] Step S104: Based on the abnormal information between the fuel system and the lubricating oil system, evaluate and process the fuel system and the lubricating oil system through the system evaluation strategy to obtain the design evaluation results of the fuel system and the lubricating oil system.

[0072] In this embodiment, the terminal, based on the abnormal information between the fuel system and the lubricating oil system, evaluates and processes the fuel system and the lubricating oil system through the system evaluation strategy to obtain the design evaluation results of the fuel system and the lubricating oil system. Among them, the abnormal information between the fuel system and the lubricating oil system is different under each operating condition. The terminal, based on the abnormal information between the fuel system and the lubricating oil system under each operating condition, designs and evaluates the aspects to which different abnormal information belongs through the system evaluation strategy preset in the terminal, so as to obtain the design evaluation results of the fuel system and the lubricating oil system. Among them, the system evaluation strategy includes sub-evaluation strategies for the fuel system and the lubricating oil system in each design aspect, and each sub-evaluation strategy is the evaluation value corresponding to a different abnormal information range. Then, after the terminal designs and evaluates all the aspects to which the abnormal information belongs, the obtained evaluation values are summed to obtain the design evaluation results of the fuel system and the lubricating oil system. Among them, the design aspects include mechanical aspect: adjusting the sliding friction force; hydraulic aspect: adjusting the throttle area; electrical aspect: flow characteristics of the electro-hydraulic conversion device; heat generation aspect: return oil flow of the fuel system; heat exchange aspect: fuel system flow, lubricating oil tank volume, booster pump efficiency, heat exchanger area.

[0073] Based on the above solution, by combining the fuel system, the lubricating oil system, and each system associated with the two, a fuel-lubricating oil joint simulation model of the aero-engine is established, so that during the simulation of the operation processes of the fuel system and the lubricating oil system, the simulated results are closer to the actual operation results, avoiding the problem that a single system has poor perception of the changes in the engine state, thus affecting the practicality of the simulation. Then, this solution further combines the above systems to perform performance evaluation on the simulation operation results according to different operating conditions, so as to obtain the design evaluation results of the fuel system and the lubricating oil system of the aero-engine, making the evaluated results include the evaluation information of the fuel system and the lubricating oil system under different operating conditions, and improving the comprehensiveness and accuracy of the evaluation.

[0074] Optionally, based on the system design parameters of each system and the system operation data of each system, a system simulation model of each system is constructed, including: obtaining the system operation model of each system, and adjusting the system operation model of each system based on the system design parameters of each system to obtain the target system operation model of each system; for each system, based on the system operation data of the system, calculating the system operation control parameters of the system through the system operation control algorithm of the system, and adjusting the target system operation model of the system based on the system operation control parameters of the system to obtain the system simulation model of the system.

[0075] In this embodiment, the terminal obtains the system operation model of each system, and adjusts the system operation model of each system based on the system design parameters of each system to obtain the target system operation model of each system. Among them, the system operation model of each system can be a single-system model that has been constructed by the staff. Among them, the components of each system include but are not limited to:

[0076] a) The components of the fuel system at least include a booster pump, a spring, an actuating valve, an electro-hydraulic conversion device, a throttling element, a filtering element, and a sensing element, and at least have functions such as fuel boosting, fuel metering, shutdown fuel cut-off, mechanical actuation, electro-hydraulic conversion, position feedback, heat generation and heat exchange of mechanical and hydraulic systems.

[0077] b) The components of the lubricating oil system at least include an oil tank, a supply oil pump, a return oil pump, a filtering element, a throttling element, a sensing element, a check valve, a differential pressure switch, and an oil-gas separator, and at least have functions such as lubricating oil boosting, lubricating oil quantity distribution for each cooling component, heat generation and heat exchange in the bearing cavity, and oil-gas separation.

[0078] c) As a key component for heat exchange, the fuel / lubricating oil heat exchanger warms the fuel while cooling the lubricating oil.

[0079] d) The air system consists of a pressure source and a flow source, and the pressure, flow rate, and temperature change with the engine state and participate in the heat exchange calculation of the lubricating oil system.

[0080] Then for each system, the terminal calculates the system operation control parameters of the system through the system operation control algorithm of the system based on the system operation data of the system, and adjusts the target system operation model of the system based on the system operation control parameters of the system to obtain the system simulation model of the system. Among them, the system operation control algorithm of each system is the control instruction corresponding to each operation data of each system or the calculation formula between control parameters. This calculation formula is a calculation formula preset by the staff in the terminal.

[0081] Based on the above solution, by combining the system operation data of each system of the aero-engine, the parameters of the system operation model of each system are adjusted, so as to make the similarity between the system simulation models of each system constructed and each system of the aero-engine.

[0082] Optionally, based on the system coupling logic information between each system, the system simulation models of each system are subjected to model association processing to obtain a fuel and lubricating oil simulation model, including: based on the system coupling logic information between each system, identifying the data coupling method and the data interaction method between each system; based on the data coupling method and the data interaction method between each system, generating the data interaction instruction generation logic between each system, and based on the data interaction instruction generation logic between each system, splicing the system simulation models of each system to obtain a fuel and lubricating oil simulation model.

[0083] In this embodiment, the terminal identifies the data coupling method and the data interaction method between each system based on the system coupling logic information between each system. Then, the terminal generates the data interaction instruction generation logic between each system based on the data coupling method and the data interaction method between each system, and based on the data interaction instruction generation logic between each system, splices the system simulation models of each system to obtain a fuel and lubricating oil simulation model. As Figure 2 shown, it is a schematic diagram of the model operation structure of the fuel and lubricating oil simulation model, and in this fuel and lubricating oil simulation model, as Figure 3 shown, it is a schematic diagram of the structure principle of the fuel system; as shown in Figure 4, it is a schematic diagram of the structure principle of the lubricating oil system; as Figure 5 shown, it is a schematic diagram of the model line structure of the fuel and lubricating oil simulation model.

[0084] Specifically, for example, the engine performance transient model: According to the fuel oil quantity and the position of the regulating mechanism output by the fuel system transient model, and the mechanical output of the transmission system, calculate parameters such as the thrust, speed, temperature and efficiency of the engine. Dynamically simulate the performance of the engine under different working conditions.

[0085] The control system model: Read the speed feedback signal of the engine transient model, calculate the fuel flow control instruction according to the throttle lever input instruction and the control algorithm; then read the LVDT (Linear Variable Displacement Transducer) feedback value output by the fuel system transient model, calculate the current control instruction value according to the above fuel quantity control instruction and the control algorithm, and give it to the fuel system transient model.

[0086] Fuel system model: Based on the current control command value given by the control system model and the rotational speed signal output by the engine performance transient model, the fuel pressure, flow rate, and the position of the regulating mechanism output to the engine performance transient model are calculated. Meanwhile, the LVDT displacement signal is fed back to the control system model for fuel flow control.

[0087] Fuel / oil heat exchanger model: The lubricating oil and fuel exchange heat through the heat exchanger. This model dynamically adjusts the heat exchange rate according to the transient thermodynamic conditions.

[0088] Air system model: Based on the changes in rotational speed and power output by the engine transient model, an air flow with a certain temperature and flow rate is calculated and heat exchange calculations are carried out with the lubricating oil system model.

[0089] Transmission system model: According to the changes in rotational speed and load of the engine transient model, the heat generation characteristics of each component (bearings, gearboxes, etc.) are calculated and heat exchange calculations are carried out with the lubricating oil system model. The heat exchange characteristics change with the engine rotational speed and load.

[0090] Bearing cavity model: Calculates the heat generation characteristics that change with the external environment of the engine transient model and conducts heat exchange with the transient model of the lubricating oil system.

[0091] Lubricating oil system model: Based on the rotational speed signal output by the engine performance transient model, lubricating oil with a certain pressure and flow rate is supplied to the transmission system and bearing cavity, and the model temperature and pressure are fed back to the control system model to ensure the stable operation of the system. At the same time, the lubricating oil system model calculates the heat change during the lubricating oil circulation process according to the heat exchange amounts of systems such as the transmission system model, fuel / oil heat exchanger model, air system model, and external environment, and obtains the lubricating oil temperature values at various positions in the lubricating oil circulation loop.

[0092] Among them, the heat sources of the lubricating oil system mainly include: 1. Heat generated by bearing friction; 2. Heat brought by the friction of the bearing cavity sealing device; 3. External heat transferred through convection and conduction on the bearing cavity wall surface, heat brought by hot air leakage, and heat exchanged between the fuel tank and other accessory pipelines and the external environment; 4. Heat generated by the power loss of the lubricating oil supply pump and return pump; 5. Heat generated by the efficiency loss of the gear transmission device, etc.

[0093] Among them, the total power loss of the bearing can be divided into two parts: the frictional power loss on the moving surface and the stirring power loss of the lubricating oil inside the bearing.

[0094] Heat generation of roller bearing:

[0095] q 1 =CZρl 2 u 3 β′

[0096] Where: C - total bearing resistance coefficient, C: C1 + C2, C1 - friction coefficient, C2 - resistance coefficient; Z - number of rolling elements; ρ - lubricating oil density, Kg / m3; u - cage circumferential velocity, m / s; l - roller length, m; β′ - influence coefficient of radial clearance on power loss.

[0097] Heat generated by friction of ball bearings:

[0098] q 1 = CZρd 2 u 3

[0099] Where: C - total bearing resistance coefficient; Z - number of rolling elements; ρ - lubricating oil density, Kg / m3; u - cage circumferential velocity, m / s; d - roller length, m.

[0100] Heat generated by friction of the sealing device:

[0101] q 2 = Fμ = 2πRNμ[(P 1 - P 2 )(L - K)LS + (P 1 - P 2 )δnl 1 + W] / 60

[0102] K = 1 / 3[1 + 1 / (1 + P2 / P1)]

[0103] Where: R - sealing radius, m; N - main shaft speed, r / min; μ - friction coefficient; Pl - air chamber pressure, Pa; P2 - bearing chamber pressure, Pa; L - sealing flange width, m; S - sealing surface perimeter, S = 2πR, m; δ - contact clearance, m; n - number of joints; 11 - flange width at the joint, m; W - spring force, N.

[0104] Heat brought by air leakage:

[0105] q′ 3 = GC P Δt

[0106] Where the air system leakage rate:

[0107]

[0108] Where: D - raceway diameter, m; T - air chamber temperature, K; P 1 - air chamber pressure, MPa; P 2 - oil chamber pressure, MPa;

[0109] Heat exchanged between the external environment and the bearing chamber:

[0110] q″ 3= λΔtL + αΔtA

[0111] Where: λ - heat dissipation coefficient, which can be found from the material handbook Δt - temperature difference inside and outside the bearing chamber, α - convective heat transfer coefficient; A - convective exchange area, related to gas / liquid flow.

[0112] Heat of convective exchange of the lubricating oil tank:

[0113] q″′ 3 = αΔtA

[0114] Heat generated by the efficiency loss of the supply pump and return pump in the lubricating oil system:

[0115] q 4 = pQ(1 - ηη)

[0116] Where: p - outlet pressure of the pump, Pa; Q - flow rate of the pump, m3 / s; η - total efficiency of the gear pump.

[0117] Heat generated by the mechanical efficiency loss of the gear transmission mechanism:

[0118] q 5 = 745.7N(1 - η)

[0119] Where: N - total power, W; η represents the total transmission efficiency, generally taken as 0.9.

[0120] Heat generated by the lubricating oil system:

[0121]

[0122] The heat sources of the fuel system are divided into external factors and internal factors. External factors include: heat exchange of the fuel / oil cooler, heat exchange with the external environment. Internal factors are mainly the power loss of the fuel system itself, which is finally converted into heat and exists in the fuel system, including: efficiency loss of the booster pump, frictional pressure loss, flow loss (mainly system return oil), etc.

[0123] Heat exchange Q with the external environment 1 is the same as the heat exchange principle of the external environment of the lubricating oil system.

[0124] The efficiency loss at the booster pump is divided into the efficiency loss of the centrifugal pump and the efficiency loss of the gear pump.

[0125] Heat generated by the efficiency loss of the centrifugal pump:

[0126] Q 2 = HQρg(1 - η)

[0127] Where: H - head of the pump, m; Q - flow rate of the pump, m3 / s; ρ - fuel density, kg / m3; η - total efficiency of the gear pump.

[0128] Heat generation Q due to efficiency loss of gear pump 3 。

[0129] Heat generated by pressure loss in fuel system:

[0130] Q 4 =ΔP 1 *Q

[0131] Where: ΔP—the flow resistance of the fuel system, usually the pressure difference between the pressure after the fuel pump and the outlet pressure of the fuel system; Q—the working flow rate of the fuel, usually the fuel flow rate supplied to the final actuator.

[0132] Heat generated by flow loss in fuel system:

[0133] Q 5 =ΔP 2 *Q 回

[0134] Where: ΔP 2 —the pressure difference between the pressure after the pump and the return oil pressure, pa; Q 回 —the return oil flow rate of the fuel system, m3 / s (the difference between the fuel pump outlet flow rate and the metering flow rate).

[0135] Heat generation of fuel system:

[0136]

[0137] For the two-phase flow in the lubricating oil system and the inner wall of the bearing cavity with higher temperature, convective heat transfer needs to be carried out. The air outside the bearing cavity is in flow, and there is convective heat transfer with the outer wall of the rear bearing cavity. These several forms of forced convective heat transfer are relatively special and difficult to handle.

[0138] Formula for the convective heat transfer coefficient between the outer surface of the engine rotating shaft and the lubricating oil:

[0139]

[0140] The fuel / oil radiator adopts a shell-and-tube radiator, with fuel flowing inside the tubes and lubricating oil flowing inside the outer shell of the tubes.

[0141] Dimensionless function relationship:

[0142] ε = f(NTU, C*, M)

[0143] Where: M—the flow pattern; ε—the heat transfer efficiency of the radiator, representing the ratio of the actual heat transfer amount of the radiator to the theoretical maximum heat transfer amount; NTU—the number of heat transfer units, a dimensionless measure of the "heat transfer scale" of the radiator, expressed as:

[0144]

[0145] In the formula: A—the heat transfer area of the radiator, m2; Wmin—the smaller heat capacity flow rate of the hot and cold fluids, W / K; K—the overall heat transfer coefficient, W / m2.K.

[0146] Heat transfer coefficient:

[0147]

[0148] In the formula: α 0 and α f respectively represent the surface heat transfer coefficients inside (tube side) and outside (shell side) of the heat exchange tubes of the radiator, W / m2.K; A f and A 0 respectively represent the contact areas of the heat exchange tubes with the tube side and shell side fluids, m2; δ—the wall thickness of the heat exchange tubes, m; γ p —the thermal conductivity of the heat exchange tubes, W / m.K.

[0149] According to different flows, the average temperature difference of convection:

[0150]

[0151] It is theoretically considered that the heat taken away by the fuel system through the radiator is equal to the heat dissipated by the lubricating oil system:

[0152] Q = KΔtS

[0153] Hydraulic part design:

[0154] The determination of the lubricating oil supply amount. Under the condition of determining the characteristics of the lubricating oil medium, the lubricating oil flow rate is determined by the total heat of the lubricating oil system.

[0155]

[0156] The flow rate Q of the oil supply gear pump = 2πdmbn×10 -6 , under the condition of determined structure, its flow rate is mainly determined by the rotational speed of the lubricating oil pump. The volumetric efficiency and mechanical efficiency of the gear pump are usually 0.70 - 0.95, and are selected according to the working pressure and structural form of the pump.

[0157] Considering that there is a large amount of air dissolved in the lubricating oil solution in the return oil circuit of the lubricating oil, and the efficiency of the gear pump is low, in order to ensure the oil suction capacity of the return oil system, the flow rate of the return oil pump is usually designed to be 2 - 3 times that of the oil supply pump.

[0158] The volume of the lubricating oil tank is the sum of the maximum consumption of the lubricating oil during the engine operation time and the lubricating oil storage amount that can ensure that the oil supply pump can draw oil from the tank and meet the normal lubricating oil pressure allowed by the engine.

[0159] V = V K +V b +V p +Vt

[0160] Where: V b — Unusable lubricating oil volume; V k — Usable lubricating oil volume; V p — Expansion space; V t — Swallowed lubricating oil volume.

[0161] The commonly used oil filter on the engine is a mesh oil filter. Currently, with the increasing demand for filtration accuracy, the filtration accuracy of the filter element has been reduced to 10 μm or even 3 μm. The flow area required for the oil filter is:

[0162]

[0163] Oil filter pressure loss:

[0164]

[0165] The one-way valve is set behind the lubricating oil filter element. Its main function is to prevent the occurrence of siphon phenomenon, that is, when the lubricating oil pump is not working, the one-way valve uses the spring force to prevent the lubricating oil tank from supplying oil to the system.

[0166] The bypass valve is in parallel with the lubricating oil filter element and the one-way valve. When the filter element becomes blocked and the pressure difference reaches a certain limit, the bypass valve opens, and the lubricating oil system supplies oil directly without filtration, preventing the bearing cavity and the gear transmission device from overheating and seizing.

[0167] In order to achieve constant flow oil supply at various flight altitudes, the amount of lubricating oil remains basically unchanged from the ground to high altitude. The pressure regulating valve can return the surplus flow pumped by the pump to the inlet of the pump, thus maintaining a constant flow of lubricating oil flowing into the engine. The design parameter of the pressure regulating valve is mainly the regulating pressure value, and the magnitude of this pressure is determined by the engine pipeline damping coefficient and the amount of oil supply required for all working conditions of the engine.

[0168] From the pipeline pressure drop formula, the relationship between the pressure difference of the lubricating oil flowing in and out of the pressure regulating valve and the flow rate can be obtained:

[0169]

[0170] The diameter of the distribution injection hole is:

[0171] d = [4Q[ρ / (2gΔP)] 0.5 / (μπ) 0.5

[0172] The pipeline of the lubricating system is under the action of loads such as constant liquid pressure, bending, thermal deformation, and alternating stress generated by the vibration of the power device. The pipe diameter, length, and orientation of the pipeline should meet the resistance requirements of the system.

[0173] The pipeline diameters of each part of the lubricating oil​

[0174] Fuel system module design:

[0175] The fuel supply flow rate Q of the gear pump is Q = 2πdmbn×10 -6 , and the volumetric efficiency and mechanical efficiency of the gear pump are usually 0.70 - 0.95.

[0176] To ensure that the fuel system pressure does not exceed the limit value and protect the booster pump, a safety valve is usually installed behind the high-pressure pump. The safety valve and the high-pressure pump are in parallel. When the system pressure exceeds the limit value, the safety valve opens, and the high-pressure oil behind the gear pump returns to the front of the pump through the safety valve, forming an internal circulation.

[0177] The fuel system usually adopts a mesh oil filter. Generally, two-stage oil filters are installed at the outlet of the high-pressure pump. The fuel filtered by the coarse oil filter is supplied to the metering valve and the differential pressure valve, and the fuel filtered by the fine oil filter is supplied to the constant pressure valve and the servo valve. At present, with the increasing demand for filtration accuracy, the filtration accuracy of the filter element is reduced to 3um or even smaller, and the required flow area of the oil filter is:

[0178]

[0179] The fuel metering module consists of a metering valve, a constant pressure valve, a differential pressure valve, a metering servo valve, and a displacement sensor.

[0180] The main design parameter of the metering valve is the metering orifice area, which ensures the maximum metering flow rate and the moving speed of the metering valve.

[0181] Its metering flow rate output:

[0182]

[0183] Affected by the liquid pressure:

[0184]

[0185] The main function of the constant pressure valve is to provide constant-pressure fuel for the metering servo valve to ensure stable output of the servo oil. The constant pressure valve converts the high-pressure oil into constant-pressure oil through orifice throttling. When the oil pressure flowing out of the constant pressure valve reaches the set value, the constant-pressure oil acts on the upper end of the valve core, and reaches equilibrium with the spring force at the lower end of the valve core and the force generated by the low-pressure oil, realizing constant-pressure output.

[0186] In the stable state:

[0187] P r *A 1 =P df *A 1 +F s

[0188] Among them, Fs =-kx + F 0 is the spring elastic force, and its high-pressure flow input:

[0189]

[0190] The parking module consists of a boost valve, a parking valve, and a parking solenoid valve. During normal operation, the metered fuel enters the parking valve through the boost valve and is supplied to the engine through the parking valve. When the parking solenoid valve operates, the fuel in the parking valve changes from low-pressure fuel to high-pressure fuel. The high-pressure fuel shuts off the parking valve and the engine interface and connects to the low-pressure interface. The fuel behind the boost valve returns to the front of the gear pump, and an internal circulation is formed in the fuel system.

[0191] Based on the above solution, through the system coupling logic information between systems, each system is associated and combined, thereby obtaining a fuel and lubricating oil simulation model, improving the accuracy and comprehensiveness of the constructed fuel and lubricating oil simulation model.

[0192] Optionally, based on the various operation correlation information of the aero-engine, a system simulation strategy for the fuel and lubricating oil simulation model is generated, including: based on the operation correlation information, identifying the environmental data of the aero-engine under each operation condition and the control instruction information of each operation condition; based on the environmental data of the operation condition, identifying the environmental parameters of each environmental type of the operation condition, and based on the control instruction information of each operation condition, identifying the sub-control instructions of each system corresponding to each operation condition; taking the environmental parameters of each environmental type of each operation condition and the sub-control instructions of each system corresponding to each operation condition as the system simulation strategy of the fuel and lubricating oil simulation model.

[0193] In this embodiment, the terminal identifies the environmental data of the aero-engine under each operation condition and the control instruction information of each operation condition based on the operation correlation information. Among them, the environmental data includes the sub-environmental data ranges of different environmental types, including the temperature range of the environmental temperature type, the air velocity range of the air velocity type, the air pressure range of the air pressure type, and the humidity range of the humidity type. Then, the terminal identifies the environmental parameters of each environmental type of the operation condition based on the environmental data of the operation condition, and identifies the sub-control instructions of each system corresponding to each operation condition based on the control instruction information of each operation condition. Among them, the environmental parameters of each environmental type are the environmental parameter value ranges obtained after parameterizing the environmental data ranges of each environmental type. Among them, the terminal presets the parameterization programs of each environmental type, and combines each parameterization program to convert the sub-environmental data ranges of each environmental type into the environmental parameter value ranges of each environmental type.

[0194] Subsequently, the terminal takes the environmental parameters of each environmental type of each operation condition and the sub-control instructions of each system corresponding to each operation condition as the system simulation strategy of the fuel and lubricating oil simulation model.

[0195] Based on the above solution, by splitting and transforming each operation-related information, the environmental parameters of each environmental type for each operation condition and the sub-control instructions of each system corresponding to each operation condition are obtained, thereby improving the simulation practicality of each operation condition.

[0196] Optionally, based on the system simulation strategy, through the fuel and lubricating oil simulation model, the operation processes of the fuel system and the lubricating oil system are simulated to obtain simulation operation results, including: for each operation condition, based on the environmental parameters of each environmental type of the operation condition, the system environmental parameters of the fuel and lubricating oil simulation model are adjusted to obtain the target fuel and lubricating oil simulation model corresponding to the operation condition; based on the target fuel and lubricating oil simulation model, through the sub-control instructions of each system corresponding to the operation condition, the operation processes of the fuel system and the lubricating oil system are simulated to obtain the simulation operation data of each system corresponding to the operation condition, and the simulation operation data of all systems are used as the simulation operation results.

[0197] In this embodiment, for each operation condition, the terminal adjusts the system environmental parameters of the fuel and lubricating oil simulation model based on the environmental parameters of each environmental type of the operation condition to obtain the target fuel and lubricating oil simulation model corresponding to the operation condition. Then, based on the target fuel and lubricating oil simulation model, the terminal simulates the operation processes of the fuel system and the lubricating oil system through the sub-control instructions of each system corresponding to the operation condition to obtain the simulation operation data of each system corresponding to the operation condition, and the simulation operation data of all systems are used as the simulation operation results.

[0198] Specifically, there are dynamic interaction interfaces between the aviation engine fuel and lubricating oil systems established by the terminal and the engine performance model, the control system, and the air system, realizing the mechanical, hydraulic, electrical, and thermal coupling between the aviation engine fuel and lubricating oil systems and the control system, the engine performance, the air system, and the transmission system, and the output parameters of each system continuously change dynamically with the engine state. The interface form is shown in Table 1.

[0199] Table 1

[0200]

[0201]

[0202] The terminal obtains the dynamic change sequences of the parameters output by each system to obtain the simulation operation data of each system.

[0203] Based on the above solution, dynamic simulation is carried out through the constructed dynamic interaction interface to obtain the simulation operation data of each system, thereby ensuring the comprehensiveness and practicality of the obtained simulation operation data.

[0204] Optionally, the performance evaluation strategy, including the sub-performance evaluation strategy for each system, based on the simulation operation results, identifies the abnormal information between the fuel system and the lubricating oil system through the performance evaluation strategy, including: for each operating condition, based on the corresponding simulation operation data of each system for the operating condition, through the sub-performance evaluation strategy of each system, identifies the system performance data of each system; based on the system performance data of each system, identifies the abnormal performance information of each system, and takes the abnormal performance information of all systems as the sub-abnormal performance information of the operating condition; takes the sub-abnormal performance information of all operating conditions as the abnormal information between the fuel system and the lubricating oil system.

[0205] In this embodiment, for each operating condition, the terminal, based on the corresponding simulation operation data of each system for the operating condition, through the sub-performance evaluation strategy of each system, identifies the system performance data of each system. Then, the terminal, based on the system performance data of each system, identifies the abnormal performance information of each system, and takes the abnormal performance information of all systems as the sub-abnormal performance information of the operating condition. Finally, the terminal takes the sub-abnormal performance information of all operating conditions as the abnormal information between the fuel system and the lubricating oil system. Among them, in the performance evaluation process, for example, in the performance evaluation process of the fuel system and the lubricating oil system:

[0206] Mechanically: Whether the movement speed meets the preset conditions.

[0207] Rotational speed Fuel metering flow rate Electrical signal The process of the valve stepping from 0 to 1.

[0208] Response speed requirement: The adjustment speed value of the valve displacement is not greater than [the maximum allowable adjustment time].

[0209] Rotational speed Fuel metering flow rate The process of the valve stepping from 1 to 0.

[0210] Response speed requirement: The adjustment speed value of the valve displacement is not greater than [the maximum allowable adjustment time].

[0211] Electrically: Whether the response time meets the preset conditions.

[0212] Rotational speed Fuel metering flow rate Electric signal flag The process of electric signal c stepping from 0 to 1.

[0213] Response time requirement: The adjustment time value of the outlet mass flow rate is not greater than [the maximum allowable adjustment time].

[0214] Hydraulics: Whether the system pressure, flow accuracy, and fluctuation meet the preset conditions.

[0215] Mass flow rate: At a rotational speed of Electrical signal flag Stop signal

[0216] Accuracy requirement: The value is within the range of

reference value, usually a function of a, b, c, d

allowable error

[0217] Fluctuation requirement: The numerical range is not greater than

maximum allowable fluctuation

[0218] Pressure: At a rotational speed of Electrical signal flag Stop signal

[0219] Accuracy requirement: The value is within the range of

reference value, usually a constant

allowable error, usually a constant

[0220] Heat generation and heat exchange: Whether the temperatures of the fuel and lubricating oil systems meet the preset operating conditions.

[0221] Rotational speed Fuel flow rate Electrical signal

[0222] The short-term fuel temperature does not exceed 130 °C, and the short-term operating temperature does not exceed 163 °C.

[0223] The operating temperature of the lubricating oil does not exceed 200 °C.

[0224] Based on the above solution, by evaluating the performance of different systems according to different performance evaluation strategies, the comprehensiveness and accuracy of the analysis of the operating conditions of each system of the aero-engine are ensured, thereby effectively improving the adjustment accuracy of the subsequent system design parameters of the fuel system and the lubricating oil system.

[0225] This application also provides a design evaluation example of an aero-engine fuel system and lubricating oil system, as Figure 6 shown, and the specific processing process includes the following steps:

[0226] Step S601: Obtain the system design parameters of each system associated with the fuel system and the lubricating oil system, the system operation data of each system, the system coupling logic information between each system, and the operation association information of the aero-engine.

[0227] Step S602: Obtain the system operation model of each system, and based on the system design parameters of each system, adjust the system operation model of each system to obtain the target system operation model of each system.

[0228] Step S603: For each system, based on the system operation data of the system, through the system operation control algorithm of the system, calculate the system operation control parameters of the system, and based on the system operation control parameters of the system, adjust the target system operation model of the system to obtain the system simulation model of the system.

[0229] Step S604: Based on the system coupling logic information between the systems, identify the data coupling methods and the data interaction methods between the systems.

[0230] Step S605: Based on the data coupling methods and the data interaction methods between the systems, generate the data interaction instruction generation logic between the systems, and based on the data interaction instruction generation logic between the systems, splice the system simulation models of the systems to obtain the fuel and lubricating oil simulation model.

[0231] Step S606: Based on the operation correlation information, identify the environmental data of the aero-engine under each operating condition and the control instruction information of each operating condition.

[0232] Step S607: Based on the environmental data of the operating condition, identify the environmental parameters of each environmental type of the operating condition, and based on the control instruction information of each operating condition, identify the sub-control instructions of each system corresponding to each operating condition.

[0233] Step S608: Use the environmental parameters of each environmental type of each operating condition and the sub-control instructions of each system corresponding to each operating condition as the system simulation strategy of the fuel and lubricating oil simulation model.

[0234] Step S609: For each operating condition, based on the environmental parameters of each environmental type of the operating condition, adjust the system environmental parameters of the fuel and lubricating oil simulation model to obtain the target fuel and lubricating oil simulation model corresponding to the operating condition.

[0235] Step S610: Based on the target fuel and lubricating oil simulation model, through the sub-control instructions of each system corresponding to the operating condition, simulate the operation process of the fuel system and the lubricating oil system to obtain the simulation operation data of each system corresponding to the operating condition, and use the simulation operation data of all systems as the simulation operation result.

[0236] Step S611: For each operating condition, based on the simulation operation data of each system corresponding to the operating condition, through the sub-performance evaluation strategy of each system, identify the system performance data of each system.

[0237] Step S612: Based on the system performance data of each system, identify the abnormal performance information of each system, and use the abnormal performance information of all systems as the sub-abnormal performance information of the operating condition.

[0238] Step S613: Use the sub - abnormal performance information of all operating conditions as the abnormal information between the fuel system and the lubricating oil system.

[0239] It should be understood that although each step in the flowcharts involved in the above - described embodiments is shown in sequence according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above - described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0240] Based on the same inventive concept, the embodiments of the present application also provide a design evaluation device for an aero - engine fuel system and a lubricating oil system for implementing the above - mentioned design evaluation method for an aero - engine fuel system and a lubricating oil system. The solution provided by this device for solving problems is similar to the solution described in the above - mentioned method. Therefore, the specific limitations in one or more embodiments of the design evaluation device for an aero - engine fuel system and a lubricating oil system provided below can refer to the limitations on the design evaluation method for an aero - engine fuel system and a lubricating oil system in the above text, and will not be elaborated here.

[0241] In an exemplary embodiment, as Figure 7 shown, a design evaluation device for an aero - engine fuel system and a lubricating oil system is provided, including: an acquisition module 710, a generation module 720, an identification module 730, and an evaluation module 740, where:

[0242] The acquisition module 710 is configured to acquire the system design parameters of each system associated with the fuel system and the lubricating oil system, the system operation data of each of the systems, the system coupling logic information between each of the systems, and the operation - related information of the aero - engine, and construct a system simulation model for each of the systems based on the system design parameters of each of the systems and the system operation data of each of the systems;

[0243] The generation module 720 is configured to perform model association processing on each of the system simulation models based on the system coupling logic information between each of the systems to obtain a fuel - lubricating oil simulation model, and generate a system simulation strategy for the fuel - lubricating oil simulation model based on the operation - related information of the aero - engine;

[0244] An identification module 730, configured to simulate the operating processes of the fuel system and the lubricating oil system through the fuel-lubricating oil simulation model based on the system simulation strategy, obtain simulation operation results, and identify abnormal information between the fuel system and the lubricating oil system based on the simulation operation results through a performance evaluation strategy;

[0245] An evaluation module 740, configured to perform evaluation processing on the fuel system and the lubricating oil system based on the abnormal information between the fuel system and the lubricating oil system through a system evaluation strategy, and obtain design evaluation results of the fuel system and the lubricating oil system.

[0246] Optionally, the obtaining module 710 is specifically configured to:

[0247] Obtain the system operation model of each system, and adjust the system operation model of each system based on the system design parameters of each system to obtain the target system operation model of each system;

[0248] For each system, calculate the system operation control parameters of the system through the system operation control algorithm of the system based on the system operation data of the system, and adjust the target system operation model of the system based on the system operation control parameters of the system to obtain the system simulation model of the system.

[0249] Optionally, the generating module 720 is specifically configured to:

[0250] Identify the data coupling mode and the data interaction mode between each system based on the system coupling logic information between each system;

[0251] Generate the data interaction instruction generation logic between each system based on the data coupling mode and the data interaction mode between each system, and splice the system simulation models of each system based on the data interaction instruction generation logic between each system to obtain the fuel-lubricating oil simulation model.

[0252] Optionally, the generating module 720 is specifically configured to:

[0253] Identify the environmental data of the aero-engine under each operating condition and the control instruction information of each operating condition based on the operation association information;

[0254] Identify the environmental parameters of each environmental type of the operating condition based on the environmental data of the operating condition, and identify the sub-control instructions of each system corresponding to each operating condition based on the control instruction information of each operating condition;

[0255] The environmental parameters of each environmental type under each operating condition, as well as the sub-control instructions of each system corresponding to each operating condition, are used as the system simulation strategy of the fuel and lubricating oil simulation model.

[0256] Optionally, the recognition module 730 is specifically configured to:

[0257] For each operating condition, based on the environmental parameters of each environmental type of the operating condition, adjust the system environmental parameters of the fuel and lubricating oil simulation model to obtain the target fuel and lubricating oil simulation model corresponding to the operating condition;

[0258] Based on the target fuel and lubricating oil simulation model, through the sub-control instructions of each system corresponding to the operating condition, simulate the operation processes of the fuel system and the lubricating oil system to obtain the simulation operation data of each system corresponding to the operating condition, and use the simulation operation data of all systems as the simulation operation result.

[0259] Optionally, the recognition module 730 is specifically configured to:

[0260] For each operating condition, based on the simulation operation data of each system corresponding to the operating condition, identify the system performance data of each system through the sub-performance evaluation strategies of each system;

[0261] Based on the system performance data of each system, identify the abnormal performance information of each system, and use the abnormal performance information of all systems as the sub-abnormal performance information of the operating condition;

[0262] Use the sub-abnormal performance information of all operating conditions as the abnormal information between the fuel system and the lubricating oil system.

[0263] Each module in the above design evaluation device for the aero-engine fuel system and lubricating oil system can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0264] In an exemplary embodiment, a computer device is provided. The computer device can be a terminal, and its internal structure diagram can be as Figure 8As shown in the figure. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it realizes a design evaluation method for an aeroengine fuel system and a lubricating oil system. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covered on the display screen, or a button, a trackball, or a touchpad set on the computer device housing, or an external keyboard, touchpad, or mouse, etc.

[0265] Those skilled in the art can understand that Figure 8 the structure shown in the figure is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0266] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, it realizes each step of the design evaluation method for the aeroengine fuel system and the lubricating oil system.

[0267] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, it realizes each step of the design evaluation method for the aeroengine fuel system and the lubricating oil system.

[0268] In an embodiment, a computer program product is provided, including a computer program. When the computer program is executed by the processor, it realizes each step of the design evaluation method for the aeroengine fuel system and the lubricating oil system.

[0269] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0270] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random access memories (ReRAM), magnetoresistive random access memories (MRAM), ferroelectric random access memories (FRAM), phase change memories (PCM), graphene memories, etc. Volatile memories can include random access memory (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in this application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logics, data processing logics based on quantum computing, etc., and are not limited thereto.

[0271] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0272] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A design and evaluation method for an aircraft engine fuel system and lubricating oil system, characterized in that: The method comprises: Acquire system design parameters of each system associated with the fuel system and the lubricating oil system, system operation data of each of the systems, system coupling logic information between each of the systems, and operation association information of the aircraft engine, and construct a system simulation model of each of the systems based on the system design parameters of each of the systems and the system operation data of each of the systems; Based on the system coupling logic information between the systems, the simulation models of the systems are subjected to model association processing to obtain a fuel and lubricant simulation model, and based on the operation association information of the aircraft engine, a system simulation strategy of the fuel and lubricant simulation model is generated; Based on the system simulation strategy, the operation process of the fuel system and the lubricating oil system is simulated through the fuel and lubricating oil simulation model to obtain simulation operation results, and based on the simulation operation results, the abnormal information between the fuel system and the lubricating oil system is identified through a performance evaluation strategy; Based on the abnormal information between the fuel system and the lubricating oil system, the fuel system and the lubricating oil system are evaluated and processed through a system evaluation strategy to obtain design evaluation results of the fuel system and the lubricating oil system.

2. The method according to claim 1, characterized in that The system simulation model of each of the systems is constructed based on the system design parameters of each of the systems and the system operation data of each of the systems, including: Obtaining a system operation model of each system, and adjusting the system operation model of each system based on system design parameters of each system to obtain a target system operation model of each system; For each system, based on the system operation data of the system and through the system operation control algorithm of the system, the system operation control parameters of the system are calculated, and based on the system operation control parameters of the system, the target system operation model of the system is adjusted to obtain the system simulation model of the system.

3. The method according to claim 1, characterized in that Based on the system coupling logic information between the systems, the simulation models of the systems are subjected to model association processing to obtain a fuel and lubricating oil simulation model, including: Based on the system coupling logic information between the systems, identifying the data coupling mode between the systems and the data interaction mode between the systems; Based on the data coupling mode and the data interaction mode between the systems, the data interaction instruction generation logic between the systems is generated, and based on the data interaction instruction generation logic between the systems, the system simulation models of the systems are spliced ​​to obtain a fuel and lubricating oil simulation model.

4. The method according to claim 1, characterized in that: The system simulation strategy for generating the fuel and lubricating oil simulation model based on the operation-related information of the aircraft engine includes: Based on the operation-related information, identifying environmental data of the aircraft engine in each operating condition and control instruction information of each operating condition; Based on the environmental data of the operating conditions, identifying environmental parameters of each environmental type of the operating conditions, and based on the control instruction information of each operating condition, identifying sub-control instructions of each system corresponding to each operating condition; The environmental parameters of each environmental type of each operating condition and the sub-control instructions of each system corresponding to each operating condition are used as the system simulation strategy of the fuel and lubricating oil simulation model.

5. The method according to claim 4, characterized in that Based on the system simulation strategy, the operation process of the fuel system and the lubricating oil system is simulated through the fuel and lubricating oil simulation model to obtain the simulation operation result, including: For each operating condition, based on the environmental parameters of each environment type of the operating condition, adjusting the system environmental parameters of the fuel and lubricating oil simulation model to obtain a target fuel and lubricating oil simulation model corresponding to the operating condition; Based on the target fuel and lubricating oil simulation model, the operation process of the fuel system and the lubricating oil system is simulated through the sub-control instructions of each system corresponding to the operating condition, the simulation operation data of each system corresponding to the operating condition is obtained, and the simulation operation data of all systems are used as the simulation operation results.

6. The method according to claim 5, characterized in that The performance evaluation strategy includes a sub-performance evaluation strategy for each system, and the abnormal information between the fuel system and the lubricating oil system is identified through the performance evaluation strategy based on the simulation operation result, including: For each operating condition, based on the simulation operating data of each system corresponding to the operating condition, identifying the system performance data of each system through the sub-performance evaluation strategy of each system; Based on the system performance data of each system, identifying abnormal performance information of each system, and using the abnormal performance information of all systems as sub-abnormal performance information of the operating condition; Sub-abnormal performance information of all operating conditions is used as abnormal information between the fuel system and the lubricating oil system.

7. A design and evaluation device for an aircraft engine fuel system and lubricating oil system, characterized in that: The device comprises: an acquisition module, used to acquire system design parameters of each system associated with the fuel system and the lubricating oil system, system operation data of each of the systems, system coupling logic information between each of the systems, and operation association information of the aircraft engine, and to construct a system simulation model of each of the systems based on the system design parameters of each of the systems and the system operation data of each of the systems; A generating module, configured to perform model association processing on each of the system simulation models based on the system coupling logic information between the systems to obtain a fuel and lubricant simulation model, and to generate a system simulation strategy for the fuel and lubricant simulation model based on each operation association information of the aircraft engine; an identification module, configured to simulate the operation process of the fuel system and the lubricating oil system through the fuel and lubricating oil simulation model based on the system simulation strategy, obtain simulation operation results, and identify abnormal information between the fuel system and the lubricating oil system through a performance evaluation strategy based on the simulation operation results; The evaluation module is used to evaluate the fuel system and the lubricating oil system based on the abnormal information between the fuel system and the lubricating oil system through a system evaluation strategy to obtain design evaluation results of the fuel system and the lubricating oil system.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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