A modular engine system transient characteristic modeling method, device and electronic equipment

Abstract

The application discloses a modular engine system transient characteristic modeling method and device and electronic equipment, and relates to the technical field of liquid rocket engines. The method comprises the following steps: obtaining a plurality of engine components composed of flow capacity elements and / or flow resistance elements through a preset engine component division condition; determining target parameter values corresponding to the plurality of engine components based on a preset solving relationship formula of the flow capacity elements and / or a preset solving relationship formula of the flow resistance elements; determining corresponding component interface parameter values based on a preset interface component connection relationship; and determining simulation operation parameters corresponding to the engine system based on the target parameter values corresponding to the plurality of engine components and the component interface parameter values. The flow capacity elements are less affected by initial values and solving methods and other factors, the solving process is relatively stable, the pressure derivative is not prone to large disturbance to cause divergence, and the stability and reliability of the solving process are improved and ensured.

Description

Technical Field

[0001] This application relates to the field of liquid rocket engine technology, and in particular to a method, apparatus and electronic equipment for modeling transient characteristics of a modular engine system. Background Technology

[0002] Because liquid rocket engines are complex to operate, expensive to develop and test, and many phenomena cannot be directly observed through testing, modeling and simulation studies of the transient processes of engine systems are of great significance for correctly analyzing and evaluating engine transient characteristics, reducing development costs, shortening development cycles, and preventing test hazards.

[0003] The transient characteristics of engine systems are typically described using a holistic system-wide model. However, the resulting equations suffer from significant rigidity, leading to difficulties in numerical solutions. The physical essence of this rigidity lies in the fact that the low compressibility of liquid propellants means that even small perturbations in flow rate can cause substantial pressure changes within the cavity when calculating fluid pressure. Inappropriate numerical algorithms can result in unstable simulation results, where the calculated values ​​monotonically or fluctuate infinitely until overflow occurs. While reducing the integration step size can suppress overflow, it significantly increases simulation time.

[0004] Therefore, a more reasonable modeling method is needed to avoid instability caused by small perturbations during the solution process and to ensure the stability of the system simulation model solution. Summary of the Invention

[0005] The purpose of this application is to provide a method, device and electronic equipment for modeling the transient characteristics of a modular engine system, so as to solve the problem of instability caused by small disturbances in the solution process of existing modeling methods and the poor stability of the system simulation model solution.

[0006] In a first aspect, this application provides a method for modeling the transient characteristics of a modular engine system, the method comprising:

[0007] Acquire multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions;

[0008] Based on the preset solution formulas for the flow capacitive element and / or the preset solution formulas for the flow resistance element, the target parameter values ​​corresponding to the multiple engine components are determined respectively;

[0009] The corresponding component interface parameter values ​​are determined based on the preset interface component connection relationships;

[0010] Based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components, the simulation calculation parameters corresponding to the engine system are determined.

[0011] With the above technical solution, the modular engine system transient characteristic modeling method provided in this application obtains multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions; determines the target parameter values ​​corresponding to the multiple engine components based on preset solution relationships of flow capacitive elements and / or flow resistance elements; determines the corresponding component interface parameter values ​​based on preset interface component connection relationships; and determines the simulation calculation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components. The flow capacitive elements solve for pressure through inlet and outlet flow rate changes, and the flow resistance elements solve for flow rate through inlet and outlet pressure changes. The flow capacitive elements and flow resistance elements are alternately connected, and the flow rates at the inlet and outlet of the flow capacitive elements are calculated and determined by the upstream and downstream flow resistance elements connected to them. It is less affected by factors such as initial values ​​and solution methods, the solution process is relatively stable, and the pressure derivative is not prone to large disturbances that lead to divergence, thereby improving and ensuring the stability and reliability of the solution process.

[0012] In one possible implementation, the flow capacity element is pre-defined to solve for pressure by calculating changes in inlet and outlet flow rates;

[0013] The flow resistance element is preset to solve for the flow rate by calculating the changes in inlet and outlet pressures.

[0014] In one possible implementation, acquiring multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component partitioning conditions includes:

[0015] Based on the preset engine component division conditions, the multiple engine components are respectively divided into combinations of flow capacitive elements and / or flow resistance elements;

[0016] Acquire the plurality of engine components consisting of flow capacitive elements and / or flow resistance elements.

[0017] In one possible implementation, the engine assembly includes a turbine, a pump, a gas generator, a thrust chamber, piping, a reservoir, a cavity, a valve, or a throttle ring.

[0018] The step of dividing multiple engine components into combinations of flow-capacitance elements and / or flow-resistance elements based on the preset engine component division conditions includes:

[0019] Based on the preset engine component division conditions, the tank and the cavity are respectively divided into the flow-capacity elements;

[0020] The pump, the valve, the throttle ring, and the turbine are classified as flow resistance elements;

[0021] The pipeline, the gas generator, and the thrust chamber are divided into a combination of the flow capacity element and the flow resistance element.

[0022] In one possible implementation, dividing the pipeline, the gas generator, and the thrust chamber into a combination of the flow capacity element and the flow resistance element includes:

[0023] The pipeline is configured as a combination of flow capacitive elements at both ends and flow resistance elements in the middle.

[0024] The gas generator includes a head chamber, an injector, and a combustion chamber, wherein the head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, and the combustion chamber is configured as the flow capacity assembly;

[0025] The thrust chamber includes the head chamber, the injector, the combustion chamber, and the nozzle. The head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, the combustion chamber is configured as the flow capacity assembly, and the nozzle is configured as the flow resistance element.

[0026] In one possible implementation, the preset interface component connection relationship includes:

[0027] For flow-capacity elements, set the input and output interface pressures to flow-capacity pressures, the input interface flow rate to the flow-capacity inlet flow rate, and the output interface flow rate to the negative value of the flow-capacity outlet flow rate;

[0028] For flow resistance elements, the input port pressure is set to the flow resistance inlet pressure, the output port pressure is set to the flow resistance outlet pressure, the input port flow rate is set to the flow resistance flow rate, and the output port flow rate is set to the negative value of the flow resistance flow rate.

[0029] In one possible implementation, the preset interface component connection relationship further includes:

[0030] When the output ports of multiple flow resistance elements are connected to the input port of one flow capacitive element, the connection is completed according to the conditions that the pressure of the ports is equal and the sum of the flow rates is zero.

[0031] When the output interfaces of multiple flow capacities are connected to the input interface of one flow capacity, virtual flow resistance elements are set between the multiple upstream flow capacities and the one downstream flow capacities, respectively. The flow rate is determined by the corresponding virtual flow resistance element, and the pressure is determined by the flow capacities.

[0032] Secondly, this application also provides a modular engine system transient characteristic modeling device, the device comprising:

[0033] The acquisition module is used to acquire multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions;

[0034] The first determining module is used to determine the target parameter values ​​corresponding to the multiple engine components based on the preset solution relationship of the flow capacitive element and / or the preset solution relationship of the flow resistance element.

[0035] The second determining module is used to determine the corresponding component interface parameter values ​​based on the preset interface component connection relationship;

[0036] The third determining module is used to determine the simulation calculation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components.

[0037] In one possible implementation, the flow capacity element is pre-defined to solve for pressure by calculating changes in inlet and outlet flow rates;

[0038] The flow resistance element is preset to solve for the flow rate by calculating the changes in inlet and outlet pressures.

[0039] In one possible implementation, the acquisition module includes:

[0040] The partitioning submodule is used to divide multiple engine components into combinations of flow capacitive elements and / or flow resistance elements based on the preset engine component partitioning conditions.

[0041] The acquisition submodule is used to acquire the plurality of engine components consisting of flow capacitive elements and / or flow resistance elements.

[0042] In one possible implementation, the engine assembly includes a turbine, a pump, a gas generator, a thrust chamber, piping, a reservoir, a cavity, a valve, or a throttle ring.

[0043] The partitioning sub-module includes:

[0044] The first division unit is used to divide the tank and the cavity into flow-capacity elements based on the preset engine component division conditions.

[0045] The second dividing unit is used to divide the pump, the valve, the throttle ring, and the turbine into flow resistance elements;

[0046] The third dividing unit is used to divide the pipeline, the gas generator and the thrust chamber into a combination of the flow capacity element and the flow resistance element.

[0047] In one possible implementation, the third partitioning unit includes:

[0048] The first setting subunit is used to set the pipeline as a combination of flow capacitive elements at both ends and flow resistance elements in the middle.

[0049] The second setting subunit is used for the gas generator including a head chamber, an injector and a combustion chamber, wherein the head chamber is set as the flow capacity element, the injector is set as the flow resistance element, and the combustion chamber is set as the flow capacity assembly;

[0050] The third subunit is configured such that the thrust chamber includes the head chamber, the injector, the combustion chamber, and the nozzle, wherein the head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, the combustion chamber is configured as the flow capacity assembly, and the nozzle is configured as the flow resistance element.

[0051] In one possible implementation, the preset interface component connection relationship includes:

[0052] For flow-capacity elements, set the input and output interface pressures to flow-capacity pressures, the input interface flow rate to the flow-capacity inlet flow rate, and the output interface flow rate to the negative value of the flow-capacity outlet flow rate;

[0053] For flow resistance elements, the input port pressure is set to the flow resistance inlet pressure, the output port pressure is set to the flow resistance outlet pressure, the input port flow rate is set to the flow resistance flow rate, and the output port flow rate is set to the negative value of the flow resistance flow rate.

[0054] In one possible implementation, the preset interface component connection relationship further includes:

[0055] When the output ports of multiple flow resistance elements are connected to the input port of one flow capacitive element, the connection is completed according to the conditions that the pressure of the ports is equal and the sum of the flow rates is zero.

[0056] When the output interfaces of multiple flow capacities are connected to the input interface of one flow capacity, virtual flow resistance elements are set between the multiple upstream flow capacities and the one downstream flow capacities, respectively. The flow rate is determined by the corresponding virtual flow resistance element, and the pressure is determined by the flow capacities.

[0057] The beneficial effects of the modular engine system transient characteristic modeling device provided in the second aspect are the same as those of the modular engine system transient characteristic modeling method described in the first aspect or any possible implementation of the first aspect, and will not be repeated here.

[0058] Thirdly, this application also provides an electronic device, comprising: one or more processors; and one or more machine-readable media having instructions stored thereon, which, when executed by the one or more processors, cause the device to perform the modular engine system transient characteristic modeling method described in any possible implementation of the first aspect.

[0059] The beneficial effects of the electronic equipment provided in the third aspect are the same as those of the modular engine system transient characteristic modeling method described in the first aspect or any possible implementation of the first aspect, and will not be elaborated here. Attached Figure Description

[0060] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0061] Figure 1 A flowchart illustrating a method for modeling the transient characteristics of a modular engine system according to an embodiment of this application is shown.

[0062] Figure 2 A flowchart illustrating another method for modeling the transient characteristics of a modular engine system provided in an embodiment of this application is shown.

[0063] Figure 3 This paper shows a schematic diagram of the structure of a liquid rocket engine system provided in an embodiment of this application;

[0064] Figure 4 A schematic diagram of a pipeline modeling method provided in an embodiment of this application is shown;

[0065] Figure 5 A schematic diagram of a gas generator modeling method provided in an embodiment of this application is shown;

[0066] Figure 6 A schematic diagram of a thrust chamber modeling method provided in an embodiment of this application is shown;

[0067] Figure 7 A schematic diagram of a flow capacitive element and a flow resistance element provided in an embodiment of this application is shown;

[0068] Figure 8 This illustration shows a schematic diagram of an interface and component connection provided in an embodiment of this application;

[0069] Figure 9 This illustration shows a schematic diagram of multiple flow resistance elements being converged into a single flow capacitive element, according to an embodiment of this application.

[0070] Figure 10This illustration shows a connection method for a downstream component with only one input interface according to an embodiment of this application;

[0071] Figure 11 This illustration shows a schematic diagram of multiple flow capacitor elements being converged into a single flow capacitor element according to an embodiment of this application;

[0072] Figure 12 A schematic diagram of a method for adding virtual flow resistance elements according to an embodiment of this application is shown;

[0073] Figure 13 This paper shows a schematic diagram of the structure of a modular engine system transient characteristic modeling device provided in an embodiment of this application;

[0074] Figure 14 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application is shown;

[0075] Figure 15 This is a schematic diagram of the chip structure provided in an embodiment of this application.

[0076] Figure label:

[0077] 01-Turbine; 02-Pump; 03-Gas Generator; 04-Thrust Chamber; 05-Pipeline; 06-Storage Tank; 07-Valve; 08-Throttle Ring; 031-Oxidizer Head Chamber; 032-Oxidizer Injector; 033-Combustion Chamber; 041-Nozzle; 400-Electronic Equipment; 410-Processor; 420-Communication Interface; 430-Memory; 440-Communication Line; 500-Chip; 540-Bus System. Detailed Implementation

[0078] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, the first threshold and the second threshold are only used to distinguish different thresholds and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0079] It should be noted that, in this application, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0080] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0081] Figure 1 This paper illustrates a flowchart of a method for modeling the transient characteristics of a modular engine system according to an embodiment of this application. Figure 1 As shown, the method includes:

[0082] Step 101: Obtain multiple engine components consisting of flow capacity elements and / or flow resistance elements according to preset engine component division conditions.

[0083] In this application, the engine assembly includes a turbine, a pump, a gas generator, a thrust chamber, pipelines, a reservoir, a cavity, a valve, or a throttle coil.

[0084] In this application, based on the preset engine component division conditions, multiple engine components can be divided into combinations of flow capacity elements and / or flow resistance elements; and multiple engine components composed of flow capacity elements and / or flow resistance elements can be obtained.

[0085] Step 102: Based on the preset solution formulas for the flow capacity element and / or the preset solution formulas for the flow resistance element, determine the target parameter values ​​corresponding to the multiple engine components respectively.

[0086] The flow capacity element has a preset solution formula for calculating pressure based on changes in inlet and outlet flow rates. The flow resistance element has a preset solution formula for calculating flow rate based on changes in inlet and outlet pressure.

[0087] The target parameter value can be at least one of pressure change rate, flow rate, or flow rate change rate.

[0088] Step 103: Determine the corresponding component interface parameter values ​​based on the preset interface component connection relationship.

[0089] In this application, for flow-capacitor elements, the input interface pressure and output interface pressure are set to flow-capacitor pressure, the input interface flow rate is the flow-capacitor inlet flow rate, and the output interface flow rate is the negative value of the flow-capacitor outlet flow rate; for flow-resistance elements, the input interface pressure is set to flow-resistance inlet pressure, the output interface pressure is the flow-resistance outlet pressure, the input interface flow rate is the flow-resistance flow rate, and the output interface flow rate is the negative value of the flow-resistance flow rate.

[0090] The component interface parameter values ​​include flow rate and pressure.

[0091] Optionally, an interface is a node connecting components. Components connect to each other through interfaces, which can be divided into input interfaces and output interfaces. A component can have one or more interfaces, and the input interface of one component is connected to the output interface of another component. For a component constructed from a combination of capacitive and resistive elements, the capacitive and resistive elements within the component pass parameters through the common names of equation variables.

[0092] Step 104: Based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components, determine the simulation calculation parameters corresponding to the engine system.

[0093] In summary, the modular engine system transient characteristic modeling method provided in this application obtains multiple engine components composed of flow capacitive elements and / or flow resistance elements based on preset engine component division conditions; determines the target parameter values ​​corresponding to the multiple engine components based on preset solution relationships for the flow capacitive elements and / or flow resistance elements; determines the corresponding component interface parameter values ​​based on preset interface component connection relationships; and determines the simulation operation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components. The flow capacitive elements solve for pressure through inlet and outlet flow rate changes, and the flow resistance elements solve for flow rate through inlet and outlet pressure changes. The flow capacitive elements and flow resistance elements are alternately connected, and the flow rates at the inlet and outlet of the flow capacitive elements are calculated and determined by the upstream and downstream flow resistance elements connected to them. This method is less affected by factors such as initial values ​​and solution methods, resulting in a more stable solution process. The pressure derivative is less likely to experience large disturbances leading to divergence, thus improving and ensuring the stability and reliability of the solution process.

[0094] Figure 2 This paper illustrates a flowchart of another method for modeling the transient characteristics of a modular engine system provided in an embodiment of this application. Figure 2 As shown, the method includes:

[0095] Step 201: Based on the preset engine component division conditions, divide the multiple engine components into combinations of flow capacity elements and / or flow resistance elements.

[0096] In this application, the engine assembly includes a turbine, a pump, a gas generator, a thrust chamber, pipelines, a reservoir, a cavity, a valve, or a throttle coil.

[0097] Figure 3 This application provides a schematic diagram of the structure of a liquid rocket engine system according to an embodiment of the present application. Figure 3 As shown, the liquid rocket engine system includes multiple engine components, which may specifically include turbine 01, pump 02, gas generator 03, thrust chamber 04, pipeline 05, tank 06, cavity (not shown in the figure), valve 07 or throttle ring 08.

[0098] See Figure 3 Based on the preset engine component division conditions, the storage tank 06 and the cavity can be divided into the flow capacity element; the pump 02, the valve 07, the throttle ring 08 and the turbine 01 can be divided into the flow resistance element; and the pipeline 05, the gas generator 03 and the thrust chamber 04 can be divided into a combination of the flow capacity element and the flow resistance element.

[0099] It should be noted that the pump can be classified as a flow resistance element, and the pressure increment described by the head characteristic equation can be added to the flow equation of the component model.

[0100] Example, Figure 4 A schematic diagram of a pipeline modeling method provided in an embodiment of this application is shown, such as... Figure 4 As shown, the pipeline can be configured as a combination of flow capacitive elements at both ends and flow resistance elements in the middle. In an engine, the pipeline typically connects two flow resistance elements, but it also possesses flow resistance characteristics and flow inertia. Therefore, it can be constructed as a combination of flow capacitive elements at both ends and a flow resistance element in the middle, thereby accurately describing the pipeline characteristics while maintaining the alternating connection of flow capacitive and flow resistance elements.

[0101] In this application, the gas generator includes a head chamber, an injector, and a combustion chamber, wherein the head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, and the combustion chamber is configured as the flow capacity assembly.

[0102] Figure 5 A schematic diagram of a gas generator modeling method provided in an embodiment of this application is shown, such as... Figure 5As shown, the gas generator 03 consists of an oxidizer head chamber 031, an oxidizer injector 032, and a combustion chamber 033. The inlet is connected to a valve 07, and the outlet is connected to a turbine 01. The oxidizer head chamber 031 can be constructed as a cavity model, i.e., a flow-capacity element; the oxidizer injector 032 can be constructed as a throttling ring model, i.e., a flow-resistance element; and the combustion chamber 033 can be constructed as a flow-capacity element, thus maintaining the alternating connection of flow-capacity and flow-resistance elements. To enhance the modularity and versatility of the components, the head chamber and injector are defined as one component, collectively referred to as the injection head chamber, and the combustion chamber is defined as another component. See also... Figure 5 q m_oh_in q m_fh_in These are the inlet flow rates of the oxidizer head chamber and the fuel head chamber, respectively, P oh P fh These are the pressures in the oxidizer head chamber and the fuel head chamber, respectively, q m_oh_in q m_fh_in The flow rates of the oxidizer injector and the fuel head chamber injector are respectively, P g q represents the combustion chamber pressure. m_gg_out This is the outlet flow rate of the gas generator.

[0103] In this application, the thrust chamber includes the head chamber, the injector, the combustion chamber, and the nozzle. The head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, the combustion chamber is configured as the flow capacity assembly, and the nozzle is configured as the flow resistance element.

[0104] Figure 6 A schematic diagram of a thrust chamber modeling method provided in an embodiment of this application is shown, such as... Figure 6 As shown, the thrust chamber 04 consists of an oxidizer head chamber 031, an oxidizer injector 032, a combustion chamber 033, and a nozzle 041. The inlet is connected to a pipeline, the front end of which is typically connected to a valve or throttle coil. The outlet is the outside atmosphere, and the pressure is set to constant. Figure 6 As shown, the inlet pipe is typically short and has low flow resistance. Ignoring the inlet pipe's inertia and flow resistance, the volume of the injection head and inlet pipe are combined to form a cavity model. The injector is constructed as a throttling coil model, i.e., a flow resistance element. The combustion chamber is constructed as a flow-capacity element, and the nozzle is constructed as a flow resistance element. This maintains the alternating connection of flow-capacity and flow resistance elements. To enhance the modularity and versatility of the components, the injection head and injector are defined as one component (collectively referred to as the injection head cavity), the combustion chamber as one component, and the nozzle as one component. Figure 6 In the middle, q m_oh_in q m_fh_in These are the inlet flow rates of the oxidizer head chamber and the fuel head chamber, respectively, P oh P fh These are the pressures in the oxidizer head chamber and the fuel head chamber, respectively, q m_oh_in q m_fh_inThese represent the flow rates of the oxidizer injector and the fuel injector, respectively, P g q represents the combustion chamber pressure. m_nzl This represents the nozzle flow rate.

[0105] Step 202: Obtain the plurality of engine components consisting of flow capacitive elements and / or flow resistance elements.

[0106] In this application, engine components can be obtained.

[0107] Step 203: Based on the preset solution formulas for the flow capacity element and / or the preset solution formulas for the flow resistance element, determine the target parameter values ​​corresponding to the multiple engine components respectively.

[0108] The flow capacity element is pre-defined based on the flow rate changes at the inlet and outlet. The flow resistance element is pre-defined based on the flow rate changes at the inlet and outlet.

[0109] The target parameter value can be at least one of pressure or flow rate.

[0110] In this application, the specific calculation of the preset solution relationship for the flow-capacitance element can be shown in formula (1).

[0111]

[0112] Among them, V L Let P be the fluid volume, a be the sound velocity of the medium, and P be the fluid velocity. L For flow capacity pressure, Figure 7 The diagram shows a flow capacitive element and a flow resistance element provided in an embodiment of this application, as shown below. Figure 7 As shown, q m_L_in For the inlet flow rate of the flow vessel, q m_L_out This refers to the outlet flow rate of the flow vessel.

[0113] In this application, if the flow inertia of the flow resistance element does not need to be considered, the specific calculation of the preset solution relationship of the flow resistance element can be as shown in formula (2).

[0114]

[0115] Among them, such as Figure 7 As shown, q m_R For flow resistance, ξ R P is the flow resistance coefficient, ρ is the medium density, and P is the flow resistance coefficient. R_in P R_out The inlet and outlet pressures represent the flow resistance.

[0116] In this application, if the flow inertia of the flow resistance element needs to be considered, the flow rate is calculated as shown in formula (3).

[0117]

[0118] Where j is the inertia coefficient.

[0119] Computational modeling of pipelines can include: the inlet and outlet flow volumes of the pipeline are equal to the pipeline volume V. pipe 1 / 2, the flow rates at both ends of the inlet flow capacity are the inlet flow rates q of the pipeline. m_pipe_in Flow resistance and flow rate q in the middle of the pipeline m_pipe The flow rates at both ends of the outlet flow vessel are the flow rates q at the intermediate flow resistance of the pipeline. m_pipe Pipeline outlet flow rate q m_pipe_out The pressures at both ends of the intermediate flow resistance are the inlet and outlet flow capacity pressures, P, respectively. pipe_in P pipe_out Flow rate calculations take inertia into account. The equations describing pipeline pressure and flow rate are shown in formulas (4), (5), and (6), j pipe Let ξ be the inertia coefficient of the pipeline. pipe This is the flow resistance coefficient of the pipeline.

[0120]

[0121]

[0122]

[0123] For the pump in the engine assembly, both ends are connected to pipelines, and the pipeline ports are flow-capacity elements. However, the pressure difference between the pump outlet and inlet is affected by the flow rate. By constructing the pump as a flow resistance element, the pressure increment caused by the head is added to the flow equation, thereby accurately describing the pump characteristics while maintaining the alternating connection of flow-capacity and flow resistance elements. The calculation method of the pump flow rate change rate is shown in formulas (7) and (8), where P pump_in P pump_out These are the inlet and outlet pressures of the pump, ΔP. pump For the pump head, q m_pump ξ is the pump flow rate. pump Let ρ be the pump's flow resistance coefficient, ρ be the propellant density, and j be the flow resistance coefficient. pump Let ΔP be the coefficient of inertia of the liquid in the pump. pump This refers to the pump's head. The head is equal to the pump's flow rate q. m_pump It is a function of rotational speed n, and its specific form is fitted based on hydraulic test data.

[0124]

[0125] P pump_in =f(n,q) m_pump (8).

[0126] In this application, liquid rocket engine components can be modularly modeled by dividing them into flow capacity elements and / or flow resistance elements. The flow capacity elements solve for pressure by changing the inlet and outlet flow rates, while the flow resistance elements solve for flow rates by changing the inlet and outlet pressures. The flow capacity elements and flow resistance elements are connected alternately. The flow rates at the inlet and outlet of the flow capacity elements are determined by calculations using the upstream and downstream flow resistance elements connected to them. This method is less affected by factors such as initial values ​​and solution methods, resulting in a more stable solution process. The pressure derivative is less likely to experience significant disturbances leading to divergence, thus improving and ensuring the stability and reliability of the solution process.

[0127] Step 204: Determine the corresponding component interface parameter values ​​based on the preset interface component connection relationship.

[0128] In this application, for flow-capacitor components, the input and output interface pressures are set to the flow-capacitor pressures, the input interface flow rate is the flow-capacitor inlet flow rate, and the output interface flow rate is the negative of the flow-capacitor outlet flow rate; for flow-resistance components, the input interface pressure is the flow-resistance inlet pressure, the output interface pressure is the flow-resistance outlet pressure, the input interface flow rate is the flow-resistance flow rate, and the output interface flow rate is the negative of the flow-resistance flow rate. The component interface parameter values ​​include flow rate and pressure.

[0129] Optionally, an interface is a node connecting components. Components connect to each other through interfaces, which can be divided into input interfaces and output interfaces. A component can have one or more interfaces, and the input interface of one component is connected to the output interface of another component. For a component constructed from a combination of capacitive and resistive elements, the capacitive and resistive elements within the component pass parameters through the common names of equation variables.

[0130] The interface variables include pressure and flow rate. These variables are the parameter values ​​of the component interface. Specifically, flow rate is defined as positive when flowing into the component and negative when flowing out. For components constructed as flow-capacity elements, the input interface pressure P is specified. port_a and the pressure P of the output interface port_b The pressure P of the flow vessel L The traffic q of the input and output interfaces m_port_a q m_port_b The inlet flow rate q is respectively m_L_in The negative value of the export flow -q m_L_in For components constructed as flow resistance elements, the pressure P at the input and output interfaces is specified. port_a P port_b The inlet and outlet pressures P of the flow resistance element are respectively. R_in P R_out The traffic q of the input and output interfaces m_port_a q m_port_b These represent the flow resistance and flow rate q, respectively. m_R The negative value of flow resistance and flow rate -qm_R For components constructed as a combination of flow-capacity elements and flow-resistance elements, the variables of the input and output interfaces are selected according to the element types at the component's inlet and outlet, respectively, following the rules described above. For example, if the inlet of the injection head cavity is a flow-capacity element, then the pressure at the input interface is the flow-capacity pressure of the head cavity, the flow rate at the input interface is the flow-capacity inlet flow rate of the head cavity, the pressure at the output interface is the flow-resistance outlet pressure of the injector, and the flow rate at the output interface is the negative value of the flow-resistance flow rate of the injector.

[0131] When the two components part_1 and part_2 are connected, the output interface of part_1 is connected to the input interface of part_2. The pressure of the connected interfaces is equal, and the sum of the flow rates is zero, as shown in formulas (9) and (10). Figure 8 As shown, Figure 8 This diagram illustrates an interface and component connection according to an embodiment of this application. During connection, it is necessary to ensure that capacitive and resistive elements are connected alternately. For example, if component part_1 is a capacitive element, or a combination of components with a capacitive element at the outlet, then part_2 must be a resistive element, or a combination of components with a resistive element at the inlet.

[0132] P port_b，part_1 =P port_a，part_2 (9);

[0133] q m_port_b，part_1 +q m_port_a，part_2 =0 (10).

[0134] In this application, when the output interfaces of multiple flow resistance elements are connected to the input interface of one flow capacitive element, the connection is completed according to the conditions that the pressure of the interfaces is equal and the sum of the flow rates is zero.

[0135] When the output interfaces of multiple flow capacities are connected to the input interface of one flow capacity, virtual flow resistance elements are set between the multiple upstream flow capacities and the one downstream flow capacities, respectively. The flow rate is determined by the corresponding virtual flow resistance element, and the pressure is determined by the flow capacities.

[0136] Specifically, liquid rocket engines often involve multiple interconnected components. One type involves the oxidizer and fuel head chambers in the gas generator or thrust chamber converging into the combustion chamber. This type of scenario involves a combination of multiple upstream components that are flow-resistance elements or have flow-resistance elements at the outlet, and a downstream component that is a flow-capacity element or has a flow-capacity element at the inlet. Figure 9 This illustration shows a schematic diagram of multiple flow resistance elements being converged into a single flow capacitive element, according to an embodiment of this application.

[0137] If the downstream component has only one input interface, the output interfaces of multiple upstream components can be connected to the input interface of the downstream component. Figure 10 This illustration shows a schematic diagram of a connection method for a downstream component with only one input interface, as proposed in an embodiment of this application. Figure 10 As shown. At this time, the interface equations still follow the rule that the pressure of the connected interfaces is equal and the sum of the flow rates is zero, as shown in formulas (11) and (12).

[0138] P port_b，part_1 =P port_b，part_2 =…=P port_b，part_n-1 =P port_a，part_n (11);

[0139] q m_port_b，part_1 +q m_port_b，part_2 +…+q m_port_b，part_n-1 +q m_port_a，part_n =0 (12).

[0140] Alternatively, multiple pipelines can be converged into a single cavity or pipeline. Figure 11 This illustration shows a schematic diagram of multiple flow capacitor elements being converged into a single flow capacitor element, as proposed in an embodiment of this application. Figure 11 As shown, multiple flow-capacity elements converge into one flow-capacity element. If they are directly connected, the flow distribution at the convergence point will be difficult to solve. Initial values ​​need to be given and iterated repeatedly, which can easily lead to calculation divergence and low system solution stability. Figure 12 A schematic diagram of a method for adding virtual flow resistance elements according to an embodiment of this application is shown, such as... Figure 12 As shown, by adding a virtual flow resistance element downstream of each pipeline and then connecting it to the cavity or pipeline, while maintaining alternating connections between flow-capacity elements and flow resistance elements, the stability of the system solution is significantly improved. Flow distribution is calculated by the virtual flow resistance element, while pressure is calculated by the flow-capacity element, thus avoiding dependence on initial values. The virtual flow resistance element can be modeled as a throttling coil, with its orifice diameter set to be the same as the pipeline diameter, avoiding adding extra flow resistance to the system and causing deviations in the calculation results.

[0141] Similar to the case where multiple pipelines converge into a single cavity or pipeline, the case where a single cavity or pipeline branches into multiple pipelines is handled by adding a virtual flow resistance element upstream of each pipeline. The main cavity or pipeline is first connected to each virtual flow resistance element, and then each virtual flow resistance element is connected to each pipeline, maintaining the alternating connection of flow resistance elements and flow resistance elements.

[0142] Step 205: Based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components, determine the simulation calculation parameters corresponding to the engine system.

[0143] In this application, by alternating the connection of flow capacitive elements and flow resistance elements, the flow rates at the inlet and outlet of the flow capacitive elements are calculated by the upstream and downstream flow resistance elements connected to them. This method is less affected by factors such as initial values ​​and solution methods, resulting in stable solutions and making it less likely for the pressure derivative to diverge due to large disturbances.

[0144] Based on the target parameter values ​​and component interface parameter values, the simulation calculation parameters corresponding to the engine system can be finally determined. For liquid rocket engine systems where multiple pipelines converge into a single pipeline or cavity, or where a single pipeline or cavity branches into multiple pipelines, i.e., when the output interfaces of multiple fluid-capacity elements are connected to the input interface of a single fluid-capacity element, a virtual flow resistance element is added downstream of each branch fluid-capacity element when multiple pipelines converge, and upstream of each branch fluid-capacity element when multiple pipelines branch. The fluid-capacity elements and flow resistance elements are kept alternately connected. The flow rate distribution is calculated by the virtual flow resistance element, and the pressure is calculated by the fluid-capacity element. This avoids dependence on the initial value, reduces the stiffness of the system model, and improves the stability of the solution.

[0145] In summary, the modular engine system transient characteristic modeling method provided in this application obtains multiple engine components composed of flow capacitive elements and / or flow resistance elements based on preset engine component division conditions; determines the target parameter values ​​corresponding to the multiple engine components based on preset solution relationships for the flow capacitive elements and / or flow resistance elements; determines the corresponding component interface parameter values ​​based on preset interface component connection relationships; and determines the simulation operation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components. The flow capacitive elements solve for pressure through inlet and outlet flow rate changes, and the flow resistance elements solve for flow rate through inlet and outlet pressure changes. The flow capacitive elements and flow resistance elements are alternately connected, and the flow rates at the inlet and outlet of the flow capacitive elements are calculated and determined by the upstream and downstream flow resistance elements connected to them. This method is less affected by factors such as initial values ​​and solution methods, resulting in a more stable solution process. The pressure derivative is less likely to experience large disturbances leading to divergence, thus improving and ensuring the stability and reliability of the solution process.

[0146] Figure 13 This paper presents a schematic diagram of the structure of a modular engine system transient characteristic modeling device according to an embodiment of this application. Figure 13 As shown, the modular engine system transient characteristic modeling device 300 includes:

[0147] The acquisition module 301 is used to acquire multiple engine components composed of flow capacity elements and / or flow resistance elements according to preset engine component division conditions;

[0148] The first determining module 302 is used to determine the target parameter values ​​corresponding to the multiple engine components based on the preset solution relationship of the flow capacitive element and / or the preset solution relationship of the flow resistance element.

[0149] The second determining module 303 is used to determine the corresponding component interface parameter values ​​based on the preset interface component connection relationship;

[0150] The third determining module 304 is used to determine the simulation calculation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components.

[0151] In one possible implementation, the flow capacity element is pre-defined to solve for pressure by calculating changes in inlet and outlet flow rates;

[0152] The flow resistance element is preset to solve for the flow rate by calculating the changes in inlet and outlet pressures.

[0153] In one possible implementation, the acquisition module includes:

[0154] The partitioning submodule is used to divide multiple engine components into combinations of flow capacitive elements and / or flow resistance elements based on the preset engine component partitioning conditions.

[0155] The acquisition submodule is used to acquire the plurality of engine components consisting of flow capacitive elements and / or flow resistance elements.

[0156] In one possible implementation, the engine assembly includes a turbine, a pump, a gas generator, a thrust chamber, piping, a reservoir, a cavity, a valve, or a throttle ring.

[0157] The partitioning sub-module includes:

[0158] The first division unit is used to divide the tank and the cavity into flow-capacity elements based on the preset engine component division conditions.

[0159] The second dividing unit is used to divide the pump, the valve, the throttle ring, and the turbine into flow resistance elements;

[0160] The third dividing unit is used to divide the pipeline, the gas generator and the thrust chamber into a combination of the flow capacity element and the flow resistance element.

[0161] In one possible implementation, the third partitioning unit includes:

[0162] The first setting subunit is used to set the pipeline as a combination of flow capacitive elements at both ends and flow resistance elements in the middle.

[0163] The second setting subunit is used for the gas generator including a head chamber, an injector and a combustion chamber, wherein the head chamber is set as the flow capacity element, the injector is set as the flow resistance element, and the combustion chamber is set as the flow capacity assembly;

[0164] The third subunit is configured such that the thrust chamber includes the head chamber, the injector, the combustion chamber, and the nozzle, wherein the head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, the combustion chamber is configured as the flow capacity assembly, and the nozzle is configured as the flow resistance element.

[0165] In one possible implementation, the preset interface component connection relationship includes:

[0166] For components classified as flow-capacity elements, the input and output interface pressures are set as flow-capacity pressures, the input interface flow rate is the flow-capacity inlet flow rate, and the output interface flow rate is the negative value of the flow-capacity outlet flow rate.

[0167] For flow resistance elements, the input port pressure is set to the flow resistance inlet pressure, the output port pressure is set to the flow resistance outlet pressure, the input port flow rate is set to the flow resistance flow rate, and the output port flow rate is set to the negative value of the flow resistance flow rate.

[0168] In one possible implementation, the preset interface component connection relationship further includes:

[0169] When the output ports of multiple flow resistance elements are connected to the input port of one flow capacitive element, the connection is completed according to the conditions that the pressure of the ports is equal and the sum of the flow rates is zero.

[0170] When the output interfaces of multiple flow capacities are connected to the input interface of one flow capacity, virtual flow resistance elements are set between the multiple upstream flow capacities and the one downstream flow capacities, respectively. The flow rate is determined by the corresponding virtual flow resistance element, and the pressure is determined by the flow capacities.

[0171] In summary, the modular engine system transient characteristic modeling device provided in this application obtains multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions; determines the target parameter values ​​corresponding to the multiple engine components based on preset solution relationships of the flow capacitive elements and / or flow resistance elements; determines the corresponding component interface parameter values ​​based on preset interface component connection relationships; and determines the simulation calculation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components. The flow capacitive elements solve for pressure through inlet and outlet flow rate changes, and the flow resistance elements solve for flow rate or flow rate change rate through inlet and outlet pressure changes. The flow capacitive elements and flow resistance elements are alternately connected, and the flow rates at the inlet and outlet of the flow capacitive elements are calculated and determined by the upstream and downstream flow resistance elements connected to them. It is less affected by factors such as initial values ​​and solution methods, the solution process is relatively stable, and the pressure derivative is not prone to large disturbances that could lead to divergence, thus improving and ensuring the stability and reliability of the solution process.

[0172] This application provides a modular engine system transient characteristic modeling device, which can achieve, for example... Figure 1-12 To avoid repetition, the transient characteristic modeling method of any of the modular engine systems shown will not be described again here.

[0173] The electronic device in this application embodiment can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. For example, a mobile electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc., while a non-mobile electronic device can be a server, network-attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc., and this application embodiment does not specifically limit the scope.

[0174] The electronic device in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit the specific operating system used.

[0175] Figure 14 A schematic diagram of the hardware structure of an electronic device according to an embodiment of this application is shown. Figure 14As shown, the electronic device 400 includes a processor 410.

[0176] like Figure 14 As shown, the processor 410 described above can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0177] like Figure 14 As shown, the electronic device 400 may further include a communication line 440. The communication line 440 may include a path for transmitting information between the components.

[0178] Optional, such as Figure 14 As shown, the above-described electronic device may further include a communication interface 420. There may be one or more communication interfaces 420. The communication interface 420 may use any transceiver-like device for communicating with other devices or communication networks.

[0179] Optional, such as Figure 14 As shown, the electronic device may further include a memory 430. The memory 430 stores computer execution instructions for implementing the scheme of this application, and its execution is controlled by a processor. The processor executes the computer execution instructions stored in the memory to implement the method provided in the embodiments of this application.

[0180] like Figure 14 As shown, memory 430 can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. Memory 430 can exist independently and be connected to processor 410 via communication line 440. Memory 430 can also be integrated with processor 410.

[0181] Optionally, the computer execution instructions in the embodiments of this application may also be referred to as application code, and the embodiments of this application do not specifically limit this.

[0182] In a specific implementation, as one example, such as Figure 14 As shown, processor 410 may include one or more CPUs, such as Figure 14 CPU0 and CPU1 in the CPU.

[0183] In a specific implementation, as one example, such as Figure 14 As shown, the terminal device may include multiple processors, such as Figure 14 The processors in the system. Each of these processors can be a single-core processor or a multi-core processor.

[0184] Figure 15 This is a schematic diagram of the chip structure provided in an embodiment of this application. Figure 15 As shown, the chip 500 includes one or more processors 410.

[0185] Optional, such as Figure 15 As shown, the chip also includes a communication interface 420 and a memory 430. The memory 430 may include read-only memory and random access memory, and provides operation instructions and data to the processor. A portion of the memory may also include non-volatile random access memory (NVRAM).

[0186] In some implementations, such as Figure 15 As shown, memory 430 stores the following elements: execution modules or data structures, or subsets thereof, or extended sets thereof.

[0187] In the embodiments of this application, such as Figure 15 As shown, the corresponding operation is executed by calling the operation instructions stored in the memory (which can be stored in the operating system).

[0188] like Figure 15 As shown, the processor 410 controls the processing operations of any one of the terminal devices. The processor 410 can also be called a central processing unit (CPU).

[0189] like Figure 15As shown, memory 430 may include read-only memory and random access memory, providing instructions and data to the processor. A portion of memory 430 may also include NVRAM. For example, in an application, memory, communication interfaces, and memory are coupled together via a bus system, which may include, in addition to a data bus, a power bus, a control bus, and a status signal bus, etc. However, for clarity, in... Figure 15 The general labeled all buses as Bus System 540.

[0190] like Figure 15 As shown, the methods disclosed in the embodiments of this application can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0191] On the one hand, a computer-readable storage medium is provided, which stores instructions that, when executed, implement the functions performed by the terminal device in the above embodiments.

[0192] On the one hand, a chip is provided that is used in a terminal device. The chip includes at least one processor and a communication interface. The communication interface and at least one processor are coupled together. The processor is used to run instructions to implement the functions performed by the modular engine system transient characteristic modeling method in the above embodiments.

[0193] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); or it can be a semiconductor medium, such as a solid-state drive (SSD).

[0194] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0195] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A method for modeling the transient characteristics of a modular engine system, characterized in that, The method includes: Acquire multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions; Based on the preset solution formulas for the flow capacitive element and / or the preset solution formulas for the flow resistance element, the target parameter values ​​corresponding to the multiple engine components are determined respectively; The corresponding component interface parameter values ​​are determined based on the preset interface component connection relationships; Based on the target parameter values ​​and component interface parameter values ​​corresponding to multiple engine components, the simulation calculation parameters corresponding to the engine system are determined. The preset solution formula for the flow capacity element is to calculate the pressure by changing the inlet and outlet flow rates. The flow resistance element is pre-defined to calculate the flow rate by changing the inlet and outlet pressures. Wherein, the flow rate is the mass flow rate; The acquisition of multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions includes: Based on the preset engine component division conditions, the multiple engine components are respectively divided into combinations of flow capacitive elements and / or flow resistance elements; Acquire the plurality of engine components consisting of flow capacitive elements and / or flow resistance elements; The preset interface component connection relationships include: For flow-capacity elements, set the input and output interface pressures to flow-capacity pressures, the input interface flow rate to the flow-capacity inlet flow rate, and the output interface flow rate to the negative value of the flow-capacity outlet flow rate; For flow resistance elements, the input port pressure is set to the flow resistance inlet pressure, the output port pressure is set to the flow resistance outlet pressure, the input port flow rate is set to the flow resistance flow rate, and the output port flow rate is set to the negative value of the flow resistance flow rate. When the output ports of multiple flow resistance elements are connected to the input port of one flow capacitive element, the connection is completed according to the conditions that the pressure of the ports is equal and the sum of the flow rates is zero. When the output interfaces of multiple flow capacities are connected to the input interface of one flow capacity, virtual flow resistance elements are set between the multiple upstream flow capacities and one downstream flow capacities, respectively. The flow rate is determined by the corresponding virtual flow resistance element, and the pressure is determined by the flow capacities.

2. The method for modeling the transient characteristics of a modular engine system according to claim 1, characterized in that, The engine assembly includes a turbine, pump, gas generator, thrust chamber, pipelines, tank, cavity, valve or throttle ring; The step of dividing multiple engine components into combinations of flow-capacitance elements and / or flow-resistance elements based on the preset engine component division conditions includes: Based on the preset engine component division conditions, the tank and the cavity are respectively divided into the flow-capacity elements; The pump, the valve, the throttle ring, and the turbine are classified as flow resistance elements; The pipeline, the gas generator, and the thrust chamber are divided into a combination of the flow capacity element and the flow resistance element.

3. The method for modeling the transient characteristics of a modular engine system according to claim 2, characterized in that, The method of dividing the pipeline, the gas generator, and the thrust chamber into a combination of the flow capacity element and the flow resistance element includes: The pipeline is configured as a combination of flow capacitive elements at both ends and flow resistance elements in the middle. The gas generator includes a head chamber, an injector, and a combustion chamber, wherein the head chamber is configured as the flow-capacity element, the injector is configured as the flow-resistance element, and the combustion chamber is configured as the flow-capacity element; The thrust chamber includes the head chamber, the injector, the combustion chamber, and the nozzle. The head chamber is configured as the flow capacity element, the injector is configured as the flow resistance element, the combustion chamber is configured as the flow capacity element, and the nozzle is configured as the flow resistance element.

4. A modular engine system transient characteristic modeling device, characterized in that, The apparatus is applied to the transient characteristic modeling method for a modular engine system according to any one of claims 1-3; the apparatus comprises: The acquisition module is used to acquire multiple engine components composed of flow capacitive elements and / or flow resistance elements according to preset engine component division conditions; The first determining module is used to determine the target parameter values ​​corresponding to the multiple engine components based on the preset solution formulas of the flow capacitive element and / or the preset solution formulas of the flow resistance element. The second determining module is used to determine the corresponding component interface parameter values ​​based on the preset interface component connection relationship; The third determining module is used to determine the simulation calculation parameters corresponding to the engine system based on the target parameter values ​​and component interface parameter values ​​corresponding to the multiple engine components; The first determining module includes: The partitioning submodule is used to divide multiple engine components into combinations of flow capacitive elements and / or flow resistance elements based on the preset engine component partitioning conditions. The first determining submodule is used to determine the target parameter values ​​corresponding to multiple engine components based on the preset solution formulas of the flow capacitive element and / or the preset solution formulas of the flow resistance element.

5. An electronic device, characterized in that, include: One or more processors; And one or more machine-readable media thereon storing instructions, which, when executed by the one or more processors, cause the transient characteristic modeling method of any one of claims 1 to 3 to be performed.

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