A method, device, equipment and medium for fuel calibration of a rotary detonation engine

Abstract

The application discloses a rotary detonation engine fuel calibration method, device, equipment and medium, and relates to the technical field of engines. The method comprises the following steps: acquiring an inlet temperature and an outlet temperature of an engine fuel pump; calculating a temperature difference before and after the engine fuel pump according to the inlet temperature and the outlet temperature; obtaining a basic compensation coefficient through a multi-dimensional mapping table of offline calibration according to the temperature difference before and after the engine fuel pump, in combination with a fuel pump rotating speed, the inlet temperature, pump cumulative working time and pump post-load pressure; and correcting a theoretical nominal flow to obtain a real fuel flow. The method can accurately calibrate the rotary detonation engine fuel.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to a method, apparatus, equipment and medium for fuel calibration of a rotary detonation engine. Background Technology

[0002] Rotary detonation engines are a new type of aviation power plant that relies on the continuous propagation of detonation waves in an annular combustion chamber to achieve pressurized combustion. They require extremely high precision in controlling the fuel equivalence ratio (at the level of ±0.01), and accurate calibration of fuel flow rate is one of the technologies that ensures their stable operation.

[0003] Currently, fuel metering schemes for aero-engines primarily employ single-point temperature compensation. For example, a single temperature sensor is installed at the fuel system's metering valve to collect fuel temperature data. This data is then corrected based on a pre-set temperature-flow compensation table, and the controller calculates the fuel flow command. This scheme has been widely used in traditional gas turbines.

[0004] However, the above method is inaccurate for calibrating the fuel for rotary detonation engines. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, and medium for calibrating fuel for a rotary detonation engine, which can accurately calibrate the fuel for a rotary detonation engine.

[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a method for fuel calibration of a rotating detonation engine, comprising: Obtain the inlet and outlet temperatures of the engine fuel pump; Calculate the temperature difference before and after the engine fuel pump based on the inlet and outlet temperatures. Based on the aforementioned temperature difference before and after, combined with the fuel pump speed, inlet temperature, pump cumulative working time, and post-pump load pressure, the basic compensation coefficient is obtained through an offline calibrated multidimensional mapping table. Based on the aforementioned basic compensation coefficient, the theoretical nominal flow rate is corrected to obtain the actual fuel flow rate.

[0007] Optionally, the step of correcting the theoretical nominal flow rate according to the basic compensation coefficient to obtain the actual fuel flow rate includes: Get the working time compensation increment and the load compensation increment; Based on the aforementioned basic compensation coefficient, working time compensation increment, and load compensation increment, the theoretical nominal flow rate is corrected to obtain the actual fuel flow rate.

[0008] Optionally, the working time compensation increment is obtained in the following way: The working time compensation increment is calculated based on the pump's cumulative working time and time compensation coefficient.

[0009] Optionally, the load compensation increment is obtained in the following way: Calculate the difference between the pump downstream load pressure and the reference load pressure based on the pump downstream load pressure and the reference load pressure. The load compensation increment is obtained by multiplying the difference by the load compensation coefficient.

[0010] Optionally, the theoretical nominal flow rate is obtained in the following way: The theoretical nominal flow rate is obtained based on the fuel pump speed, fuel reference density, pump displacement per revolution, and reference volumetric efficiency.

[0011] Optionally, the method further includes: The temperature difference before and after is subjected to a first-order filter to obtain the filtered temperature difference.

[0012] Optionally, after obtaining the actual fuel flow rate, the method further includes: Calculate the current real-time equivalence ratio based on the actual fuel flow rate and the oxidant flow rate entering the combustion chamber; Compare the current real-time equivalence ratio with the target equivalence ratio range; When the current real-time equivalence ratio deviates from the target equivalence ratio range, the fuel pump speed or injection pulse width is adjusted to restore the current real-time equivalence ratio to the target equivalence ratio range.

[0013] Secondly, this application provides a fuel calibration device for a rotary detonation engine, comprising: The acquisition module is used to acquire the inlet and outlet temperatures of the engine fuel pump. The processing module is used to calculate the temperature difference before and after the engine fuel pump based on the inlet temperature and outlet temperature; and to obtain the basic compensation coefficient based on the temperature difference before and after the pump, combined with the fuel pump speed, inlet temperature, pump cumulative working time and pump load pressure, through an offline calibrated multidimensional mapping table. The correction module is used to correct the theoretical nominal flow rate according to the basic compensation coefficient to obtain the actual fuel flow rate.

[0014] Thirdly, this application provides a computing device, including a memory and a processor; The memory stores one or more computer programs, the one or more computer programs including instructions; when the instructions are executed by the processor, the computing device performs the method as described in any one of the first aspects.

[0015] Fourthly, this application provides a computer-readable storage medium for storing a computer program for performing the method as described in any one of the first aspects.

[0016] As can be seen from the above technical solution, this application has at least the following beneficial effects: This application simultaneously collects the inlet and outlet temperatures of the fuel pump and calculates the temperature difference between them. Compared to single-point temperature acquisition, this provides a more comprehensive reflection of temperature changes during fuel pump operation. By combining fuel pump speed, inlet temperature, cumulative pump operating time, downstream load pressure, and the temperature difference, a basic compensation coefficient is obtained from an offline calibrated multidimensional mapping table. This coefficient is then used to correct the theoretical nominal flow rate to obtain the actual fuel flow rate. This reduces flow rate deviations caused by factors such as temperature changes, operating time, and load pressure, adapting to the requirements of rotary knock engines and improving the accuracy of fuel flow rate values.

[0017] Furthermore, this application adds working time compensation increment and load compensation increment, which, together with the basic compensation coefficient, correct the theoretical nominal flow rate, adapting to the working state of the fuel pump under different operating durations and load pressures. The working time compensation increment is calculated based on the pump's cumulative working time and time compensation coefficient, while the load compensation increment is calculated based on the downstream load pressure, reference load pressure, and load compensation coefficient, thus addressing flow rate changes under different operating conditions. The theoretical nominal flow rate is determined based on the fuel pump speed, fuel reference density, pump displacement per revolution, and reference volumetric efficiency, ensuring the flow rate calculation process closely matches the actual operating parameters of the fuel pump. First-order filtering of the temperature difference before and after the flow reduces the impact of signal fluctuations. The real-time equivalence ratio is derived based on the actual fuel flow rate and oxidant flow rate. Adjusting the fuel pump speed or injection pulse width after comparing with the target equivalence ratio range maintains the equivalence ratio within the set range, ensuring normal engine operation.

[0018] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0019] Figure 1 A flowchart of a method for calibrating fuel for a rotary detonation engine, provided in an embodiment of this application; Figure 2 A schematic diagram of a rotary detonation engine fuel calibration device provided in an embodiment of this application; Figure 3 This is a schematic diagram of a computing device provided in an embodiment of this application. Detailed Implementation

[0020] The terms "first," "second," and "third," etc., used in this application specification and accompanying drawings are used to distinguish different objects, not to limit a specific order.

[0021] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0022] Rotating detonation engines have strict requirements for equivalence ratio, and the stability of the equivalence ratio depends on the accurate acquisition of fuel flow rate. Current fuel metering methods for aero engines only collect fuel temperature at a single point for flow rate correction, without taking into account factors such as the overall temperature change of the fuel pump, operating time, and load pressure.

[0023] During actual operation, the fuel pump continuously generates heat, causing a temperature difference between the inlet and outlet. Single-point temperature acquisition cannot fully reflect the impact of pump heat generation on fuel condition. Simultaneously, the increasing cumulative operating time of the fuel pump and continuous changes in the downstream load pressure alter the pump's delivery state, resulting in a deviation between the theoretical nominal flow rate and the actual delivery flow rate. Temperature difference signals are prone to fluctuations during acquisition, which can also interfere with flow rate calculations. This flow rate deviation causes the real-time equivalence ratio to deviate from the target equivalence ratio range, thereby affecting the operating state of the rotary knock engine.

[0024] In view of this, embodiments of this application provide a method for fuel calibration of a rotary detonation engine, which can be executed by a processing device. This processing device can be a terminal or a server. Terminals include, but are not limited to, smartphones, tablets, laptops, personal digital assistants, or smart wearable devices. Servers can be cloud servers, such as central servers in a central cloud computing cluster or edge servers in an edge cloud computing cluster. Alternatively, servers can be located in a local data center. A local data center refers to a data center directly controlled by the user.

[0025] To address the issue that existing aero-engines rely solely on single-point fuel temperature for flow compensation, which fails to meet the operational requirements of rotating knock engines, this application combines the inlet and outlet temperatures of the fuel pump to calculate the temperature difference before and after the pump. It also incorporates multiple operating parameters such as fuel pump speed, cumulative pump operating time, and post-pump load pressure. A multi-dimensional mapping table generated through offline calibration is used to obtain compensation coefficients, and theoretical nominal flow rates are corrected using operating time and load compensation increments. Furthermore, the temperature difference signal is filtered to avoid signal interference. Based on this, the real-time equivalence ratio is calculated according to the corrected actual fuel flow rate. When the equivalence ratio deviates from the set range, the fuel pump speed or injection pulse width is adjusted to adapt to various fuel pump operating conditions, improve fuel flow calculation effectiveness, and maintain stable engine combustion conditions.

[0026] To make the technical solution of this application clearer and easier to understand, the following describes a method for fuel calibration of a rotating knock engine provided by an embodiment of this application, in conjunction with the accompanying drawings. Figure 1 As shown, this figure is a flowchart of a fuel calibration method for a rotating detonation engine provided in an embodiment of this application. In this embodiment, the method includes: S201, The processing equipment obtains the inlet and outlet temperatures of the engine fuel pump.

[0027] The fuel pump is the component that delivers fuel to the combustion chamber in a rotary knock engine. The fuel pump inlet temperature is the fuel temperature detected at the point where fuel flows into the fuel pump. The fuel pump outlet temperature is the fuel temperature detected at the point where fuel flows out of the fuel pump.

[0028] The processing equipment collects temperature data at the inlet and outlet of the fuel pump using temperature sensors connected to both locations. After data acquisition, the equipment generates two sets of temperature values: one corresponding to the temperature of the fuel entering the fuel pump, and the other to the temperature of the fuel leaving the fuel pump. These two sets of values ​​reflect the temperature changes that occur throughout the fuel's flow through the fuel pump.

[0029] S202. The processing equipment calculates the temperature difference before and after the engine fuel pump based on the inlet and outlet temperatures.

[0030] The temperature difference between the front and rear is the temperature difference obtained by subtracting the inlet temperature from the outlet temperature of the fuel pump.

[0031] The processing equipment retrieves the collected inlet and outlet temperatures, and subtracts the inlet temperature from the outlet temperature to perform a numerical calculation. The result is the temperature difference, which reflects the temperature change of the fuel after passing through the fuel pump. The expression for the temperature difference is:

[0032] in, Indicates the temperature difference before and after. Indicates the outlet temperature. Indicates the inlet temperature.

[0033] The method also includes: The processing equipment performs a first-order filter on the temperature difference before and after the process to obtain the filtered temperature difference.

[0034] First-order filtering is a signal smoothing method that uses a weighted average of the current signal and the filtering result from the previous time step to weaken short-term signal fluctuations. The filtered temperature difference is the temperature value output after the original temperature difference has undergone first-order filtering.

[0035] The processing equipment retrieves the real-time calculated temperature difference before and after the fuel pump cycle, combines it with the filtered temperature difference from the previous cycle, and performs a weighted calculation according to first-order filtering rules. The resulting filtered temperature difference reflects the relatively stable temperature difference under fuel pump operating conditions. The corresponding expression is:

[0036] in, This represents the temperature difference after filtering. Represents the filter coefficients. This indicates the temperature difference between the current moment and the previous moment. This represents the temperature difference after filtering at the previous moment.

[0037] After performing a first-order filter on the temperature difference before and after the engine to obtain the filtered temperature difference, the process also includes: adaptively adjusting the filter coefficients of the first-order filter based on the current engine operating parameters. ; Specifically, when the engine is detected to be in the starting or changing operating condition phase, the filter coefficient will be... Set to the first preset value (e.g., 0.3) to improve the temperature difference response speed; when the engine is detected to be in a steady-state cruise phase, adjust the filter coefficient. Set to a second preset value (e.g., 0.1) to enhance the smoothness of the temperature difference signal; filter coefficient Adjust in real time based on the rate of change of fuel pump speed or the rate of change of load pressure after the pump.

[0038] S203. The processing equipment obtains the basic compensation coefficient based on the temperature difference before and after the pump, combined with the fuel pump speed, inlet temperature, pump cumulative working time, and post-pump load pressure, through an offline calibrated multidimensional mapping table.

[0039] Fuel pump speed is the rotational speed of the fuel pump during operation. Pump cumulative operating time is the total duration of continuous operation of the fuel pump from startup. Post-pump load pressure is the pressure value experienced at the fuel pump outlet. The offline calibrated multidimensional mapping table is a table of parameter correspondences compiled from multiple sets of operating condition tests completed in a test environment beforehand. The basic compensation coefficient is a correction parameter obtained by querying and calculating based on the multidimensional mapping table.

[0040] The processing equipment collects five types of parameters under the current operating conditions: filtered temperature difference, fuel pump speed, inlet temperature, cumulative pump operating time, and post-pump load pressure. It then queries an offline calibrated multidimensional mapping table according to preset rules and performs calculations using interpolation. After the calculation, a basic compensation coefficient is obtained, which reflects the degree of influence of each current operating parameter on fuel flow. The corresponding expression is:

[0041] in, Indicates the basic compensation coefficient. This represents the lookup and interpolation logic based on a multidimensional mapping table. This represents the temperature difference after filtering. Indicates the fuel pump speed. Indicates the inlet temperature. Indicates the cumulative working time of the pump. This indicates the load pressure after the pump.

[0042] In some embodiments, the current operating condition is set: , , , , The interpolation weights for each dimension are as follows: Post-pump load weight Working time weight Temperature weighting Inlet oil temperature weighting Rotational speed weight .

[0043] One-dimensional linear interpolation calculations are performed sequentially based on pump load, operating time, temperature difference, inlet oil temperature, and speed. The specific process is as follows: Post-pump load dimension interpolation: Select the coefficients corresponding to two adjacent discrete points in this dimension as input: , Weight :

[0044] Substitute the values:

[0045] Output intermediate coefficients: (Right now ) Interpolation of working time dimension: Input , Weight :

[0046] Substitute the values:

[0047] Output intermediate coefficients: (Right now ) Temperature difference interpolation: Input , Weight :

[0048] Substitute the values:

[0049] Output intermediate coefficients: (Right now ) Inlet oil temperature dimension interpolation: Input , Weight :

[0050] Substitute the values:

[0051] Output intermediate coefficients: (Right now ) Rotational speed interpolation: Input , Weight :

[0052] Substitute the values:

[0053] Output the final basic compensation coefficient:

[0054] S204. The processing equipment corrects the theoretical nominal flow rate based on the basic compensation coefficient to obtain the actual fuel flow rate.

[0055] The theoretical nominal flow rate is the theoretical value of fuel delivery calculated based on the structural parameters and operating speed of the fuel pump itself.

[0056] The actual fuel flow rate is the value of the actual fuel delivery flow rate obtained after coefficient correction.

[0057] The theoretical nominal flow is obtained in the following way: The processing equipment calculates the theoretical nominal flow rate based on the fuel pump speed, fuel reference density, pump displacement per revolution, and reference volumetric efficiency. The expression for calculating the theoretical nominal flow rate is:

[0058] in, Represents the theoretical nominal flow. Indicates the base density of fuel. Indicates the fuel pump speed. This indicates the pump's displacement per revolution. This indicates the baseline volumetric efficiency.

[0059] In some embodiments, the processing device acquires the working time compensation increment and the load compensation increment; and corrects the theoretical nominal flow rate according to the basic compensation coefficient, the working time compensation increment and the load compensation increment to obtain the actual fuel flow rate.

[0060] The operating time compensation increment is a correction value set for flow rate changes caused by the cumulative operating time of the fuel pump. The load compensation increment is a correction value set for flow rate changes caused by changes in the fuel pump outlet load pressure.

[0061] The incremental compensation for working hours is obtained in the following ways: The processing equipment calculates the working time compensation increment based on the pump's cumulative working time and a time compensation coefficient. The expression for the working time compensation increment is:

[0062] in, This indicates an increase in compensation for working hours. Indicates the time compensation coefficient. Represents the time constant. This indicates the pump's cumulative operating time.

[0063] In this embodiment, for example, , ,

[0064]

[0065] The load compensation increment is obtained in the following way: The processing equipment calculates the difference between the downstream load pressure and the reference load pressure based on the downstream load pressure and the reference load pressure; then, it obtains the load compensation increment by multiplying the difference by the load compensation coefficient. The expression for calculating the load compensation increment is as follows:

[0066] in, Indicates the load compensation increment. Indicates the load compensation coefficient. Indicates the load pressure after the pump. This indicates the reference load pressure.

[0067] For example: , ,

[0068]

[0069] Before synthesizing the final real-time compensation coefficient based on the basic compensation coefficient, working time compensation increment, and load compensation increment, the following steps are also included: Basic compensation coefficient Incremental compensation for working hours and load compensation increment Perform reasonableness checks separately; The upper limit threshold of the preset basic compensation coefficient and lower threshold The upper limit threshold for the preset working time compensation increment. and lower threshold The upper limit threshold for preset load compensation increment. and lower threshold ; The verification rules are as follows: like If the value exceeds its upper or lower threshold range, the effective basic compensation coefficient or boundary threshold from the previous moment will be used to replace the current value. like If it exceeds its upper or lower threshold range, then use Alternatively, a boundary threshold can be used to replace the current value; like If it exceeds its upper or lower threshold range, then use Alternatively, a boundary threshold can be used to replace the current value; The final real-time compensation coefficient is synthesized only when all verification items pass.

[0070] The processing equipment first collects and calculates the working time compensation increment and the load compensation increment, then combines these two increments with the basic compensation coefficient to jointly correct the theoretical nominal flow rate and output the actual fuel flow rate. This flow rate value can reflect the actual fuel delivery situation of the fuel pump under aging operating conditions, pressure load, and temperature changes.

[0071] The expression for calculating the actual fuel flow rate is:

[0072]

[0073] in, Indicates the actual fuel flow rate. Represents the theoretical nominal flow. This represents the final real-time compensation coefficient. Indicates the basic compensation coefficient. This indicates an increase in compensation for working hours. This indicates the load compensation increment.

[0074] After obtaining the actual fuel flow rate, the method also includes: The processing equipment calculates the current real-time equivalence ratio based on the actual fuel flow rate and the oxidant flow rate entering the combustion chamber; compares the current real-time equivalence ratio with the target equivalence ratio range; when the current real-time equivalence ratio deviates from the target equivalence ratio range, it adjusts the fuel pump speed or injection pulse width to restore the current real-time equivalence ratio to the target equivalence ratio range.

[0075] Oxidant flow rate is the numerical value of the flow rate of oxidant delivered to the combustion chamber. Real-time equivalence ratio is the ratio calculated from the actual fuel flow rate and the oxidant flow rate. Target equivalence ratio range is the range of equivalence ratio values ​​corresponding to normal engine operation. Fuel pump speed is the rotational speed of the fuel pump during operation. Injection pulse width is a parameter that controls the duration of fuel injection.

[0076] The processing equipment retrieves the actual fuel flow rate and oxidizer flow rate to calculate the real-time equivalence ratio. It then compares the calculated real-time equivalence ratio with a preset target equivalence ratio range. If the real-time equivalence ratio exceeds this range, the equipment adjusts the fuel pump speed or injection pulse width. After the operation is complete, the fuel supply status can be changed to bring the real-time equivalence ratio back within the target range. This ratio reflects the current combustion conditions of the engine.

[0077] The formula for calculating the real-time equivalence ratio is:

[0078] in, Indicates the real-time equivalent ratio. Indicates the actual fuel flow rate. This indicates the oxidant flow rate.

[0079] Based on the above description, this application has the following beneficial effects: Existing aero-engines rely solely on fuel temperature at a single point for flow compensation, failing to reflect the temperature changes throughout the fuel flow through the fuel pump and thus making them unsuitable for the operating scenarios of rotating knock engines. This application simultaneously collects the fuel pump inlet and outlet temperatures and calculates the temperature difference. Combined with multiple operating parameters such as fuel pump speed, cumulative pump operating time, and downstream load pressure, it uses an offline calibrated multidimensional mapping table to determine the basic compensation coefficient and complete flow correction. This comprehensively incorporates the influence of various operating parameters, improving fuel flow calibration results and adapting to the fuel flow requirements of rotating knock engines.

[0080] The above text combined Figure 1 The method for calibrating the fuel of a rotating detonation engine provided in this application embodiment has been described in detail. The apparatus and equipment provided in this application embodiment will be described below with reference to the accompanying drawings.

[0081] like Figure 2 As shown in the figure, this is a schematic diagram of a rotary detonation engine fuel calibration device provided in an embodiment of this application. The device includes: The acquisition module 301 is used to acquire the inlet temperature and outlet temperature of the engine fuel pump; The processing module 302 is used to calculate the temperature difference before and after the engine fuel pump based on the inlet temperature and outlet temperature; and to obtain the basic compensation coefficient based on the temperature difference before and after the pump, combined with the fuel pump speed, inlet temperature, pump cumulative working time and pump load pressure, through an offline calibrated multidimensional mapping table. The correction module 303 is used to correct the theoretical nominal flow rate according to the basic compensation coefficient to obtain the actual fuel flow rate.

[0082] Optionally, the processing module 302 is specifically used to obtain the working time compensation increment and the load compensation increment; Based on the aforementioned basic compensation coefficient, working time compensation increment, and load compensation increment, the theoretical nominal flow rate is corrected to obtain the actual fuel flow rate.

[0083] Optionally, the processing module 302 is specifically used to calculate the working time compensation increment based on the cumulative working time of the pump and the time compensation coefficient.

[0084] Optionally, the processing module 302 is specifically used to calculate the difference between the pump-after load pressure and the reference load pressure based on the pump-after load pressure and the reference load pressure. The load compensation increment is obtained by multiplying the difference by the load compensation coefficient.

[0085] Optionally, the processing module 302 is specifically used to obtain the theoretical nominal flow rate based on the fuel pump speed, fuel reference density, pump displacement per revolution, and reference volumetric efficiency.

[0086] Optionally, the processing module 302 is also used to perform first-order filtering on the temperature difference before and after to obtain the filtered temperature difference.

[0087] Optionally, the processing module 302 is also used to calculate the current real-time equivalence ratio based on the actual fuel flow rate and the oxidant flow rate entering the combustion chamber; Compare the current real-time equivalence ratio with the target equivalence ratio range; When the current real-time equivalence ratio deviates from the target equivalence ratio range, the fuel pump speed or injection pulse width is adjusted to restore the current real-time equivalence ratio to the target equivalence ratio range.

[0088] The rotary detonation engine fuel calibration device according to the embodiments of this application can correspond to the execution of the method described in the embodiments of this application, and the other operations and / or functions of each module / unit of the rotary detonation engine fuel calibration device are respectively for realizing Figure 1 For the sake of brevity, the corresponding processes of each method in the illustrated embodiments will not be described in detail here.

[0089] This application also provides a computing device. For example... Figure 3 As shown in the figure, this is a schematic diagram of a computing device provided in an embodiment of this application. The computing device 700 includes a bus 701, a processor 702, a communication interface 703, and a memory 704. The processor 702, the memory 704, and the communication interface 703 communicate with each other via the bus 701.

[0090] The 701 bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0091] The processor 702 can be any one or more of the following processors: central processing unit (CPU), graphics processing unit (GPU), microprocessor (MP), or digital signal processor (DSP).

[0092] The communication interface 703 is used for external communication.

[0093] Memory 704 may include volatile memory, such as random access memory (RAM). Memory 704 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid state drive (SSD).

[0094] The memory 704 stores executable code, and the processor 702 executes the executable code to perform the aforementioned rotary detonation engine fuel calibration method.

[0095] Specifically, in achieving Figure 2 In the case of the illustrated embodiment, and Figure 2 When the modules or units of the rotary knock engine fuel calibration device described in the embodiments are implemented by software, the following steps are performed: Figure 2 The software or program code required for the functions of each module / unit can be partially or entirely stored in memory 704. Processor 702 executes the program code corresponding to each unit stored in memory 704 to execute the aforementioned rotary knock engine fuel calibration method.

[0096] This application also provides a computer-readable storage medium. The computer-readable storage medium can be any available medium that a computing device can store, or a data storage device such as a data center containing one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive). The computer-readable storage medium includes instructions that instruct the computing device to execute the aforementioned rotary detonation engine fuel calibration method.

[0097] This application also provides a computer program product comprising one or more computer instructions. When the computer instructions are loaded and executed on a computing device, all or part of the processes or functions described in this application are generated.

[0098] The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, or data center to another website, computer, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0099] When the computer program product is executed by a computer, the computer performs any of the aforementioned methods of the rotary detonation engine fuel calibration method. The computer program product can be a software installation package; when any of the aforementioned methods of the rotary detonation engine fuel calibration method is required, the computer program product can be downloaded and executed on the computer.

[0100] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0101] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application.

Claims

1. A method for fuel calibration of a rotating detonation engine, characterized in that, The method includes: Obtain the inlet and outlet temperatures of the engine fuel pump; Calculate the temperature difference before and after the engine fuel pump based on the inlet and outlet temperatures. Based on the aforementioned temperature difference before and after, combined with the fuel pump speed, inlet temperature, pump cumulative working time, and post-pump load pressure, the basic compensation coefficient is obtained through an offline calibrated multidimensional mapping table. Based on the aforementioned basic compensation coefficient, the theoretical nominal flow rate is corrected to obtain the actual fuel flow rate.

2. The method according to claim 1, characterized in that, The step of correcting the theoretical nominal flow rate according to the basic compensation coefficient to obtain the actual fuel flow rate includes: Get the working time compensation increment and the load compensation increment; Based on the aforementioned basic compensation coefficient, working time compensation increment, and load compensation increment, the theoretical nominal flow rate is corrected to obtain the actual fuel flow rate.

3. The method according to claim 2, characterized in that, The working time compensation increment is obtained in the following way: The working time compensation increment is calculated based on the pump's cumulative working time and time compensation coefficient.

4. The method according to claim 2, characterized in that, The load compensation increment is obtained in the following way: Calculate the difference between the pump downstream load pressure and the reference load pressure based on the pump downstream load pressure and the reference load pressure. The load compensation increment is obtained by multiplying the difference by the load compensation coefficient.

5. The method according to claim 1, characterized in that, The theoretical nominal flow rate is obtained in the following way: The theoretical nominal flow rate is obtained based on the fuel pump speed, fuel reference density, pump displacement per revolution, and reference volumetric efficiency.

6. The method according to claim 1, characterized in that, The method further includes: The temperature difference before and after is subjected to a first-order filter to obtain the filtered temperature difference.

7. The method according to claim 1, characterized in that, After obtaining the actual fuel flow rate, the method further includes: Calculate the current real-time equivalence ratio based on the actual fuel flow rate and the oxidant flow rate entering the combustion chamber; Compare the current real-time equivalence ratio with the target equivalence ratio range; When the current real-time equivalence ratio deviates from the target equivalence ratio range, the fuel pump speed or injection pulse width is adjusted to restore the current real-time equivalence ratio to the target equivalence ratio range.

8. A fuel calibration device for a rotary detonation engine, characterized in that, The device includes: The acquisition module is used to acquire the inlet and outlet temperatures of the engine fuel pump. The processing module is used to calculate the temperature difference before and after the engine fuel pump based on the inlet temperature and outlet temperature; and to obtain the basic compensation coefficient based on the temperature difference before and after the pump, combined with the fuel pump speed, inlet temperature, pump cumulative working time and pump load pressure, through an offline calibrated multidimensional mapping table. The correction module is used to correct the theoretical nominal flow rate according to the basic compensation coefficient to obtain the actual fuel flow rate.

9. A computing device, characterized in that, Including memory and processor; The memory stores one or more computer programs, the one or more computer programs including instructions; when the instructions are executed by the processor, the computing device performs the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program for performing the method as described in any one of claims 1 to 7.

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