A verification system and verification method for performance of a liquid rocket pressurized delivery system

Abstract

This application provides a verification system and method for the performance of a liquid rocket pressurization and delivery system. The system includes: a liquid flow sensor, a liquid flow regulating valve, a cushion pressure sensor, a tank bottom pressure sensor, and a feedback controller. The liquid flow sensor and the liquid flow regulating valve are installed on the delivery pipeline of the tank. The cushion pressure sensor is installed at the top of the tank to collect the cushion pressure. The tank bottom pressure sensor is installed at the bottom of the tank to collect the bottom pressure. The feedback controller collects data from the liquid flow sensor, the cushion pressure sensor, and the tank bottom pressure sensor, processes and judges the collected data, and then sends an adjustment signal to the liquid flow regulating valve. This application can verify the performance of the pressurization and delivery system when it is not connected to the engine, and can adjust the delivery flow rate of the pressurization and delivery system in real time to stably simulate the consumption of engine propellant.

Description

Technical Field

[0001] This application relates to the field of performance verification technology for rocket pressurization and delivery systems, and in particular to a verification system and method for the performance of a liquid rocket pressurization and delivery system. Background Technology

[0002] Rocket pressurization and delivery system: This system provides propellant at a specific pressure and temperature to the rocket engine inlet. It consists of a pressurization system and a delivery system. The delivery system mainly refers to the piping and valve system between the propellant tank and the engine. The pressurization system increases the pressure of the propellant tank's gas cushion. The engine consumes a large amount of propellant, and as the engine operates, the volume of the propellant tank's gas cushion continuously expands. If gas is not replenished in time, the pressure of the gas cushion will decrease, failing to meet the engine inlet pressure requirements. Therefore, in addition to supplying propellant to the engine, the pressurization and delivery system must maintain a stable engine inlet pressure throughout the engine's operation. This is also a performance requirement for the pressurization and delivery system.

[0003] On the one hand, the engine's propellant consumption flow rate is very large, and changes in tank pressure and liquid level make it difficult to maintain a stable flow rate, which also makes simulation challenging. Therefore, it is difficult to verify the performance of the pressurization and delivery system before conducting power system tests or flights. On the other hand, attempting to verify the system during power system tests or flights would pose significant safety risks.

[0004] Therefore, the urgent technical problem to be solved is: how to verify the performance of the booster delivery system independently without connecting it to the engine, and how to adjust the delivery flow rate of the booster delivery system in real time to stably simulate the consumption of engine propellant. Summary of the Invention

[0005] The purpose of this application is to provide a verification system and method for the performance of a liquid rocket pressurization and delivery system. The system can verify the performance of the pressurization and delivery system independently without connecting it to the engine, and can adjust the delivery flow rate of the pressurization and delivery system in real time to stably simulate the consumption of engine propellant.

[0006] To achieve the above objectives, as a first aspect of this application, this application provides a performance verification system for a liquid rocket pressurization and delivery system. The system includes: a liquid flow sensor, a liquid flow regulating valve, a cushion pressure sensor, a tank bottom pressure sensor, and a feedback controller. The liquid flow sensor and the liquid flow regulating valve are installed on the delivery pipeline of the storage tank. The cushion pressure sensor is installed at the top of the storage tank to collect the cushion pressure. The tank bottom pressure sensor is installed at the bottom of the storage tank to collect the tank bottom pressure. The feedback controller is connected to the liquid flow sensor, the cushion pressure sensor, the tank bottom pressure sensor, and the liquid flow regulating valve. The feedback controller collects data from the liquid flow sensor, the cushion pressure sensor, and the tank bottom pressure sensor, processes and judges the collected data, and then sends an adjustment signal to the liquid flow regulating valve based on the judgment result.

[0007] The liquid rocket pressurization and delivery system performance verification system described above, wherein the top opening of the tank is connected to a pressurization module via a pressurization pipeline.

[0008] The liquid rocket pressurization and delivery system performance verification system described above includes a pressurization gas pressure sensor, a temperature sensor, and a gas flow meter installed on the pressurization pipeline.

[0009] The liquid rocket pressurization and delivery system performance verification system described above includes a first pressure measuring point and a second pressure measuring point installed on the delivery pipeline of the storage tank.

[0010] The liquid rocket pressurization and delivery system performance verification system as described above, wherein the output end of the delivery pipeline of the storage tank is connected to the inside of the water tank.

[0011] The liquid rocket pressurization and delivery system performance verification system described above includes an exhaust valve and a safety valve installed at the top of the tank.

[0012] As a second aspect of this application, this application provides a method for verifying the performance of a liquid rocket pressurization and delivery system. The method includes the following steps: at the start of the test, the liquid flow regulating valve is opened to a preset opening degree; within one control cycle, the delivery flow rate of the storage tank is calculated based on data collected by the liquid flow sensor and the pressure sensor; it is determined whether the delivery flow rate of the storage tank is less than the rated flow rate; if so, the opening degree of the flow regulating valve is increased; otherwise, the opening degree of the flow regulating valve is decreased; it is determined whether the time from the start time of the test to the current test time is less than the preset flight time; if so, the next control cycle is entered; otherwise, the test ends.

[0013] The method for verifying the performance of the liquid rocket pressurization and delivery system as described above includes the following steps for calculating the delivery flow rate of the storage tank: a liquid flow sensor reads the real-time flow rate to obtain first flow data; an air cushion pressure sensor and a tank bottom pressure sensor read the real-time pressure data; the real-time pressure data is processed to obtain second flow data; it is determined whether the time for obtaining the second flow data exceeds the response time of the liquid flow sensor. If so, the first flow data is used as the delivery flow rate of the storage tank; otherwise, the second flow data is used as the delivery flow rate of the storage tank.

[0014] The method for verifying the performance of the liquid rocket pressurization and delivery system as described above includes the following steps for processing real-time pressure data to obtain second flow rate data: taking the median of the real-time pressure data collected by three air cushion pressure sensors as the air cushion pressure; calculating the liquid level height of the tank based on the air cushion pressure and the tank bottom pressure; calculating the volumetric flow rate of the tank based on the current liquid level height and the previous liquid level height; and calculating the mass flow rate of the tank based on the volumetric flow rate of the tank, which is then used as the second flow rate data.

[0015] The method for verifying the performance of the liquid rocket pressurization and delivery system described above includes monitoring the flow resistance of the pressurization and delivery system.

[0016] The beneficial effects achieved by this application are as follows:

[0017] (1) Before the power system test and flight (direct test or flight, with engine participation and engine ignition, which has extremely high requirements for funding and safety. If the booster delivery system is not capable enough, problems such as engine turbine cavitation and engine explosion may occur), this application verifies the performance of the booster delivery system in advance when the booster delivery system is not connected to the engine, thereby avoiding the financial and safety risks of direct test or flight.

[0018] (2) The feedback controller provided in this application has a feedback control function, which solves the problem of unstable flow caused by changes in tank pressure and liquid level. The flow rate of the delivery pipeline is obtained through a flow sensor (liquid flow sensor) and a pressure sensor (air cushion pressure sensor, tank bottom pressure sensor), and compared with the rated flow rate. Based on the comparison result, the liquid flow regulating valve is controlled to ensure the stability of the flow rate of the delivery pipeline.

[0019] (3) The flow sensor in this application has a long response time during the test start-up phase. Simple flow sensor control may cause the liquid flow regulating valve to malfunction. Therefore, the flow rate calculated by pressure sensors (air cushion pressure sensor, bottom pressure sensor) is set as the control basis to improve the accuracy of the liquid flow regulating valve opening adjustment, avoid malfunction of the liquid flow regulating valve, and improve the stability of the system.

[0020] (4) This application sets up three air pillow pressure sensors and takes the median value of the three air pillow pressure sensors to avoid control errors caused by the instability of the air pillow pressure sensors. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the structure of a liquid rocket pressurization and delivery system performance verification system according to an embodiment of this application.

[0023] Figure 2 Flowchart-1 shows a method for verifying the performance of a liquid rocket pressurization and delivery system according to an embodiment of this application.

[0024] Figure 3 This is a flowchart illustrating a method for obtaining the transport flow rate value of a storage tank according to an embodiment of this application.

[0025] Figure 4 Flowchart-2 shows a method for verifying the performance of a liquid rocket pressurization and delivery system according to an embodiment of this application.

[0026] Reference numerals in the attached diagram: 1-Liquid flow sensor; 2-Liquid flow regulating valve; 3-Air cushion pressure sensor; 4-Bottom pressure sensor; 5-Feedback controller; 6-Storage tank; 7-Pressure boosting module; 61-Delivery pipeline; 62-Water tank; 63-Valve; 64-First pressure measuring point; 65-Second pressure measuring point; 66-Exhaust valve; 67-Safety valve; 71-Pressure boosting gas pressure sensor; 72-Temperature sensor; 73-Gas flow meter; 74-Pressure boosting pipeline. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Example 1

[0029] like Figure 1As shown, this application provides a verification system for the performance of a liquid rocket pressurization and delivery system; the system includes: a liquid flow sensor 1, a liquid flow regulating valve 2, an air cushion pressure sensor 3, a tank bottom pressure sensor 4, and a feedback controller 5; the liquid flow sensor 1 and the liquid flow regulating valve 2 are installed on the delivery pipeline 61 of the storage tank 6; the air cushion pressure sensor 3 is installed at the top of the storage tank 6 to collect the air cushion pressure of the storage tank 6; the tank bottom pressure sensor 4 is installed at the bottom of the storage tank 6 to collect the tank bottom pressure of the storage tank 6; the feedback controller 5 is connected to the liquid flow sensor 1, the air cushion pressure sensor 3, the tank bottom pressure sensor 4, and the liquid flow regulating valve 2; the feedback controller 5 is used to collect data from the liquid flow sensor 1, the air cushion pressure sensor 3, and the tank bottom pressure sensor 4, and after processing and judging the collected data, it sends an adjustment signal to the liquid flow regulating valve 2 according to the judgment result.

[0030] This application discloses a performance verification system for a liquid rocket pressurization and delivery system. At the start of the test, the liquid flow regulating valve 2 is opened to a preset opening degree. During multiple control cycles, the feedback controller 5 calculates the delivery flow rate of the storage tank 6 based on data collected by multiple sensors (liquid flow sensor 1, air cushion pressure sensor 3, and tank bottom pressure sensor 4, etc.). The calculated delivery flow rate of the storage tank 6 represents the simulated engine propellant consumption. The delivery flow rate of the storage tank 6 is compared with the rated flow rate. Based on the comparison result, an adjustment signal is sent to the liquid flow regulating valve 2. The opening degree of the regulating valve is changed by the adjustment signal to maintain a constant delivery flow rate of the storage tank 6, thereby stably simulating the engine propellant consumption.

[0031] Specifically, determine whether the flow rate of storage tank 6 is less than the rated flow rate. If so, increase the opening of the flow regulating valve; otherwise, decrease the opening of the flow regulating valve.

[0032] like Figure 1 As shown, the top opening of the storage tank 6 is connected to a pressurization module 7 via a pressurization pipeline 74. The outlet of the pressurization module 7 is connected to the top inlet of the storage tank 6. The pressurization module 7 is used to pressurize the storage tank 6 through the pressurization pipeline 74.

[0033] like Figure 1As shown, the booster pipeline 74 is equipped with a booster gas pressure sensor 71, a temperature sensor 72, and a gas flow meter 73. The booster gas pressure sensor 71 monitors the pressure at the outlet of the booster module 7; the temperature sensor 72 monitors the temperature at the outlet of the booster module 7; and the gas flow meter 73 monitors the booster gas volume of the booster module 7. The booster gas pressure sensor 71, temperature sensor 72, and gas flow meter 73 are all communicatively connected to the feedback controller 5, and are used to feed back their respective collected data to the feedback controller 5. The feedback controller 5 evaluates the performance of the booster module 7 based on the data fed back by the booster gas pressure sensor 71, temperature sensor 72, and gas flow meter 73.

[0034] like Figure 1 As shown, the conveying pipeline 61 of the storage tank 6 is also equipped with a first pressure measuring point 64 and a second pressure measuring point 65. The first pressure measuring point 64 and the second pressure measuring point 65 are used to obtain the performance parameter of the booster conveying system: flow resistance, in order to test the performance of the booster conveying system, that is, to verify the flow resistance of the booster conveying system.

[0035] As a specific embodiment of the present invention, the first pressure measuring point 64 and the second pressure measuring point 65 are both pressure sensors. The first pressure measuring point 64 and the second pressure measuring point 65 are spaced apart on the conveying pipeline 61. The pressure difference between the pressure measuring points on the conveying pipeline is the flow resistance of the pressurized conveying system, that is, the first pressure measuring point 64 and the second pressure measuring point 65 are the flow resistance of the pressurized conveying system.

[0036] like Figure 1 As shown, the input end of the delivery pipeline 61 is connected to the bottom opening of the storage tank 6, and the output end of the delivery pipeline 61 is connected to the interior of the water tank 62. The propellant stored in the storage tank 6 is delivered to the water tank 62 through the delivery pipeline 61. Since the propellant flow rate in the storage tank 6 is very large, the propellant is collected in the water tank 62.

[0037] like Figure 1 As shown, the top of the storage tank 6 is equipped with an exhaust valve 66 and a safety valve 67, both of which are connected to the top opening of the storage tank 6. The exhaust valve 66 and the safety valve 67 are provided to ensure the safety of the storage tank 6 and to release gas pressure.

[0038] In a preferred embodiment of the present invention, the air pillow pressure sensor 3 includes three sensors, namely P2, P3, and P4 (e.g., ...). Figure 1 (As shown). Three air cushion pressure sensors are connected to the top of the storage tank 6 via pipelines, and the three air cushion pressure sensors are arranged sequentially on the pipelines connected to the top of the storage tank 6.

[0039] As a specific embodiment of the present invention, a performance verification system for a liquid rocket pressurization and delivery system further includes a valve 63. The valve 63 is installed on the delivery pipeline 61 and is used to control the opening and closing of the delivery pipeline 61. When the valve 63 is open, the propellant in the storage tank 6 is delivered from the delivery pipeline 61 to the water tank 62; when the valve 63 is closed, the propellant in the storage tank 6 cannot be delivered from the delivery pipeline 61 to the water tank 62.

[0040] As a specific embodiment of the present invention, the storage tank 6 and the pressurization module 7 are consistent with the storage tank 6 and pressurization system on the rocket. The pressurization gas pressure sensor 71 (P1), temperature sensor 72 (T1), and gas flow meter 73 are used to obtain the performance parameters of the pressurization module 7, verify the pressurization gas volume and pressurization flow rate, and evaluate the performance of the pressurization module 7.

[0041] In a preferred embodiment of the present invention, the water tank 62 is an open-top water tank with an opening at the top, which facilitates the collection of propellant in the storage tank 6 for later use.

[0042] Example 2

[0043] like Figure 2 and 4 As shown, this application provides a method for verifying the performance of a liquid rocket pressurization and delivery system, the method comprising the following steps:

[0044] Step S1: The test begins, and the liquid flow regulating valve opens to the preset opening degree.

[0045] Specifically, at the start of the experiment, time counting is performed, with an initial time t0 = 0, and the liquid flow regulating valve is controlled to open to the preset opening degree.

[0046] Step S2: Within one control cycle, calculate the transport flow rate of the storage tank based on the data collected by the liquid flow sensor and the pressure sensor.

[0047] like Figure 3 As shown, step S2 includes the following sub-steps:

[0048] In step S210, the liquid flow sensor reads the real-time flow rate and obtains the first flow data Q1; the air cushion pressure sensor and the bottom pressure sensor read the real-time pressure data.

[0049] Among them, the air cushion pressure sensor reads the air cushion pressure of the storage tank; the tank bottom pressure sensor reads the tank bottom pressure.

[0050] Step S220: Process the real-time pressure data to obtain the second flow rate data Q2.

[0051] The method for processing real-time pressure data to obtain the second flow rate data Q2 includes the following sub-steps:

[0052] Step S221: Take the median value of the real-time pressure data collected by the three air pillow pressure sensors as the air pillow pressure.

[0053] In a specific embodiment of the present invention, the three air cushion pressure sensors are designated as the first air cushion pressure sensor P2, the second air cushion pressure sensor P3, and the third air cushion pressure sensor P4. The air cushion pressure in the storage tank is affected by factors such as pressurized airflow, liquid level changes, and heat exchange between the cryogenic liquid and the air cushion, which can cause the values ​​of the air cushion pressure sensors to become unstable or even inaccurate. To avoid this influence, three air cushion pressure sensors are used, with the median value being taken as the air cushion pressure P0.

[0054] As a specific embodiment of the present invention, the method for taking the median value is as follows: sort the data read by the first air pillow pressure sensor P2, the second air pillow pressure sensor P3 and the third air pillow pressure sensor P4 from smallest to largest, and take the middle reading as the air pillow pressure P0.

[0055] Step S222: Calculate the liquid level in the tank based on the air cushion pressure and the tank bottom pressure.

[0056] Specifically, based on the formula: Tank bottom pressure - Air cushion pressure = Liquid level height * Liquid density * g, the liquid level height can be calculated as: (Tank bottom pressure - Air cushion pressure) / (Liquid density * g); where * indicates multiplication; and g represents gravitational acceleration. The liquid density refers to the density of the propellant in the tank, and the liquid level height is the height of the propellant in the tank.

[0057] Step S223: Calculate the volumetric flow rate of the tank based on the current liquid level and the previous liquid level.

[0058] Specifically, the volumetric flow rate of the storage tank is calculated as follows: Volumetric flow rate = (current liquid level height - previous liquid level height) * cross-sectional area of ​​the storage tank cavity.

[0059] Specifically, the cross-sectional area of ​​the storage tank cavity is obtained based on the actual parameters of the storage tank.

[0060] Step S224: Calculate the mass flow rate of the tank based on the volumetric flow rate of the tank, and use it as the second flow rate data Q2.

[0061] Specifically, the method for calculating mass flow rate is: Mass flow rate = Volumetric flow rate * Density.

[0062] Step S230: Determine whether the time for acquiring the second flow data Q2 exceeds the response time of the liquid flow sensor. If so, use the first flow data Q1 as the delivery flow value of the tank; otherwise, use the second flow data Q2 as the delivery flow value of the tank.

[0063] Specifically, because liquid flow sensors have a slow response time, the data collected during the test startup phase (or initial stage) is inaccurate. Controlling the opening of the liquid flow control valve based on the flow data collected by the liquid flow sensor will cause malfunctions, significantly impacting system stability. In contrast, pressure sensors (air cushion pressure sensors and chamber bottom pressure sensors) have a faster response time. Therefore, using real-time data collected by pressure sensors as the basis for adjusting the liquid flow control valve opening during the test startup phase can improve the accuracy of valve adjustment, prevent malfunctions, and enhance system stability.

[0064] Understandably, during the initial test phase, the time to acquire the first flow data Q1 is longer than the time to acquire the second flow data Q2. In other words, the time to acquire the second flow data Q2 is shorter than the response time of the liquid flow sensor. Therefore, during this initial phase, the second flow data Q2 is used as the tank's delivery flow rate value, thus increasing the perceived delivery flow rate. At the end of the initial test phase, the liquid flow sensor's response time increases, and the time to acquire the first flow data Q1 gradually becomes shorter than the time to acquire the second flow data Q2. At this point, the time to acquire the second flow data Q2 exceeds the liquid flow sensor's response time. Therefore, the first flow data Q2 acquired by the liquid flow sensor is used as the basis for adjusting the liquid flow control valve opening, thereby improving the accuracy of the liquid flow control valve opening adjustment.

[0065] Step S3: Determine whether the conveying flow rate of the storage tank is less than the rated flow rate. If so, increase the opening of the flow regulating valve; otherwise, decrease the opening of the flow regulating valve.

[0066] Specifically, the rated flow rate is preset.

[0067] Step S4: Determine whether the time from the start time of the test to the current test time is less than the preset flight time. If so, proceed to the next control cycle and return to step S2; otherwise, the test ends.

[0068] Specifically, time is counted, t i =t i-1 +dt;t i-1 t represents the time count of the (i-1)th (previous) control cycle; i dt represents the time count of the current i-th control cycle; dt represents the duration of the current control cycle.

[0069] Specifically, the duration from the start time of the experiment to the current control cycle experiment time is t. i .

[0070] As a specific embodiment of the present invention, after the test, the pressure (P1) and temperature (T1) at the outlet of the booster module are checked to verify whether the booster gas volume of the booster module meets the requirements. Simultaneously, the changes in the gas sensor values ​​during the rectification process can be observed to examine the changes in the booster gas flow rate, thereby verifying the boosting capability.

[0071] As a specific embodiment of the present invention, the method for verifying the performance of the liquid rocket pressurization and delivery system further includes monitoring the flow resistance of the pressurization and delivery system. The core parameter of the pressurization and delivery system is the flow resistance. The pressure difference between pressure measuring points on the delivery pipeline, P6-P7, represents the flow resistance of the delivery system. If the delivery pipeline is complex, such as containing elbows, corrugated pipes, reducers, etc., multiple pressure measuring points can be set to measure the flow resistance of each part and determine whether the flow resistance meets the threshold range. If it does, monitoring continues; otherwise, an abnormal alarm is triggered.

[0072] The beneficial effects achieved by this application are as follows:

[0073] (1) Before the power system test and flight (direct test or flight, involving the engine, engine ignition, which has extremely high requirements for funding and safety. If the booster delivery system is not capable enough, problems such as engine turbine cavitation and engine explosion may occur), this application verifies the performance of the booster delivery system in advance when the booster delivery system is not connected to the engine, thereby avoiding the financial and safety risks of directly conducting test or flight.

[0074] (2) The feedback controller provided in this application has a feedback control function, which solves the problem of unstable flow caused by changes in tank pressure and liquid level. The flow rate of the delivery pipeline is obtained through a flow sensor (liquid flow sensor) and a pressure sensor (air cushion pressure sensor, tank bottom pressure sensor), and compared with the rated flow rate. Based on the comparison result, the liquid flow regulating valve is controlled to ensure the stability of the flow rate of the delivery pipeline.

[0075] (3) The flow sensor in this application has a long response time during the test start-up phase. Simple flow sensor control may cause the liquid flow regulating valve to malfunction. Therefore, the flow rate calculated by pressure sensors (air cushion pressure sensor, bottom pressure sensor) is set as the control basis to improve the accuracy of the liquid flow regulating valve opening adjustment, avoid malfunction of the liquid flow regulating valve, and improve the stability of the system.

[0076] (4) This application sets up three air pillow pressure sensors and takes the median value of the three air pillow pressure sensors to avoid control errors caused by the instability of the air pillow pressure sensors.

[0077] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0078] In the description of this application, the word "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0079] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A system for verifying the performance of a liquid rocket pressurization and delivery system, characterized in that, The system includes: a liquid flow sensor, a liquid flow regulating valve, an air cushion pressure sensor, a tank bottom pressure sensor, and a feedback controller; The liquid flow sensor and the liquid flow regulating valve are installed on the delivery pipeline of the storage tank; The air cushion pressure sensor is installed at the top of the storage tank to collect the air cushion pressure of the storage tank; The tank bottom pressure sensor is installed at the bottom of the tank and is used to collect the tank bottom pressure. The feedback controller is connected to the liquid flow sensor, the air cushion pressure sensor, the tank bottom pressure sensor, and the liquid flow regulating valve. The feedback controller is used to collect data from the liquid flow sensor, the air cushion pressure sensor, and the tank bottom pressure sensor, process and judge the collected data, and send an adjustment signal to the liquid flow regulating valve according to the judgment result. The liquid flow sensor reads the real-time flow rate to obtain first flow data; the air cushion pressure sensor and the bottom pressure sensor read the real-time pressure data; and the real-time pressure data is processed to obtain second flow data. Determine whether the time for acquiring the second flow data exceeds the response time of the liquid flow sensor. If so, use the first flow data as the delivery flow value of the tank; otherwise, use the second flow data as the delivery flow value of the tank.

2. The liquid rocket pressurized delivery system performance verification system of claim 1, wherein, The top opening of the storage tank is connected to a pressurization module via a pressurization pipeline.

3. The liquid rocket pressurized delivery system performance verification system of claim 2, wherein, The booster pipeline is equipped with a booster gas pressure sensor, a temperature sensor, and a gas flow meter.

4. The liquid rocket pressurized delivery system performance verification system of claim 1, wherein, The storage tank's delivery pipeline is also equipped with a first pressure measuring point and a second pressure measuring point.

5. The liquid rocket pressurized delivery system performance verification system of claim 1, wherein, The output end of the delivery pipeline of the storage tank is connected to the inside of the water tank.

6. The liquid rocket pressurized delivery system performance verification system of claim 1, wherein, The top of the storage tank is equipped with an exhaust valve and a safety valve.

7. A method of verifying the performance of a liquid rocket pressurized feed system, characterized in that, Applied to the system according to any one of claims 1-6, the method comprises the following steps: At the start of the test, the liquid flow regulating valve opened to the preset opening degree; Within one control cycle, the delivery flow rate of the storage tank is calculated based on the data collected by the liquid flow sensor and the pressure sensor. Determine if the flow rate of the storage tank is less than the rated flow rate. If so, increase the opening of the flow regulating valve; otherwise, decrease the opening of the flow regulating valve. Determine if the time elapsed from the start time of the test to the current test time is less than the preset flight time. If so, proceed to the next control cycle; otherwise, end the test. The method for calculating the transport flow rate of the storage tank includes the following steps: The liquid flow sensor reads the real-time flow rate and obtains the first flow rate data; the air cushion pressure sensor and the bottom pressure sensor read the real-time pressure data. The real-time pressure data is processed to obtain the second flow rate data; Determine whether the time for acquiring the second flow data exceeds the response time of the liquid flow sensor. If so, use the first flow data as the delivery flow value of the tank; otherwise, use the second flow data as the delivery flow value of the tank.

8. The method of validating performance of a liquid rocket pressurized delivery system of claim 7, wherein, The method for processing real-time pressure data to obtain second flow rate data includes the following steps: The median value of the real-time pressure data collected by the three air cushion pressure sensors is taken as the air cushion pressure. Calculate the liquid level in the tank based on the pressure of the air cushion and the pressure at the bottom of the tank; Calculate the change in volumetric flow rate of the tank based on the current liquid level and the liquid level at the previous moment; The change in mass flow rate of the tank is calculated based on the change in volumetric flow rate of the tank, and this is used as the second flow rate data.

9. The method of validating performance of a liquid rocket pressurized delivery system of claim 7, wherein, Monitor the flow resistance of the booster delivery system.

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