Solution escape rule analysis method of unsymmetrical dimethylhydrazine storage equipment and related equipment

Abstract

The invention discloses solution escape law analysis of unsymmetrical dimethylhydrazine storage equipment and related equipment. The method comprises the following steps: constructing a launching well simulation model for a launching well of the unsymmetrical dimethylhydrazine storage equipment; performing grid division on the launching well simulation model; after boundary conditions are set, solution data simulation is conducted on the launching well simulation model after grid division, and solution escape data are obtained; and analyzing the solution escape data to obtain a solution escape diffusion rule. By accurately analyzing the solution escape rule of the liquid propellant, the safety of the liquid propellant in the links of transportation, storage, filling, use and the like is improved, and the leakage risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of safe handling of aerospace fuel, and in particular to a method, device, computer equipment and storage medium for analyzing the escape pattern of a solution of an unsymmetrical dimethylhydrazine storage device. Background Art

[0002] Liquid propellants mainly include unsymmetrical dimethylhydrazine, monomethylhydrazine, single propulsion-3, nitrogen tetroxide, etc., which are flammable, explosive, toxic and harmful. Due to the high risk of leakage during transportation, storage, filling and use, once a leak occurs, it is very easy to cause damage to equipment and personal property. Therefore, its emergency treatment technology has always attracted much attention.

[0003] In existing emergency response technologies, liquid propellant storage sites (such as UDMH storage sites) are generally equipped with water spray devices. Taking advantage of the fact that liquid propellants are easily soluble in water, water spray technology forms a water curtain to reduce hazards. These devices are widely used in various confined spaces where liquid propellants are stored. However, after a leak is treated with water spray, a liquid pool of a certain area is formed. The gas generated by the liquid pool will continue to diffuse within the confined space, creating an explosion risk and threatening the safety of surrounding equipment and related personnel. Therefore, there is an urgent need to analyze the escape patterns of liquid propellant solutions. Summary of the Invention

[0004] This application proposes a method, device, computer equipment and storage medium for analyzing the solution escape pattern of a UDMH storage device, which accurately analyzes the solution escape pattern of a liquid propellant, improves the safety of the liquid propellant in transportation, storage, filling and use, and reduces the risk of leakage.

[0005] In a first aspect, a method for analyzing the solution escape pattern of an unsymmetrical dimethylhydrazine storage device is provided, comprising:

[0006] Construct a launch silo simulation model for the launch silo of the UDMH storage device;

[0007] Performing grid division on the silo simulation model;

[0008] After setting the boundary conditions, the solution data simulation is performed on the gridded silo simulation model to obtain the solution escape data;

[0009] The solution escape data is analyzed to obtain the solution escape diffusion law.

[0010] In a second aspect, a device for analyzing the escape pattern of a solution of an UDMH storage device is provided, comprising:

[0011] A construction module for constructing a launch silo simulation model for a launch silo of an UDMH storage device;

[0012] A partitioning module, configured to perform grid partitioning on the silo simulation model;

[0013] The simulation module is used to simulate the solution data of the gridded silo simulation model after setting the boundary conditions to obtain the solution escape data;

[0014] The analysis module is used to analyze the solution escape data to obtain the solution escape diffusion law.

[0015] Optionally, in some embodiments of the present application, when leakage occurs on the flange contact surface of the container charging and discharging connection valve of the UDMH storage device, the device further comprises:

[0016] A first acquisition module is used to obtain the leakage volume of the solution per unit time;

[0017] The second acquisition module is used to obtain the liquid pool volume, the launch silo bottom area, the missile bottom area and the liquid pool height;

[0018] a first calculation module, configured to calculate the concentration of the solution based on the volume of the liquid pool, the leakage rate per unit time, the bottom area of the silo, the bottom area of the missile, and the height of the liquid pool;

[0019] a second calculation module, configured to calculate the volatilization rate of the bottom solution and the evaporation rate of the solution flowing out of the leakage port according to the concentration of the solution;

[0020] A setting module is used to set the boundary condition according to the volatilization rate and the evaporation rate.

[0021] Optionally, in some embodiments of the present application, the first acquisition module includes:

[0022] The first acquisition submodule is used to obtain the leakage gap, the pressure difference between the inside and outside of the confined space, the solution viscosity, and the ratio of the flange inner diameter to the outer diameter;

[0023] The calculation submodule is used to calculate the leakage per unit time based on the leakage gap, the pressure difference between the inside and outside of the confined space, the solution viscosity, and the ratio of the inner diameter to the outer diameter of the flange.

[0024] Optionally, in some embodiments of the present application, the boundary conditions include control equations, mass flux inlet, solid wall boundary, solver, time term, time step, numerical simulation model, and temperature, humidity and ambient pressure in the confined space.

[0025] Optionally, in some embodiments of the present application, the simulation module includes:

[0026] The second acquisition submodule is used to obtain the solution escape data per unit area;

[0027] The second simulation submodule is used to perform solution data simulation on the gridded silo simulation model based on the solution escape data per unit area after setting the boundary conditions to obtain solution escape data.

[0028] Optionally, in some embodiments of the present application, the solution escape data includes solution escape velocity data at different height monitoring points, and the analysis module includes:

[0029] A first determining submodule is used to determine monitoring curves of monitoring points at different heights based on the solution escape velocity data at the monitoring points at different heights;

[0030] The first analysis submodule is used to analyze the plurality of monitoring curves to obtain the escape and diffusion law of the solution.

[0031] Optionally, in some embodiments of the present application, the solution escape data includes solution escape velocity data at different times at the same height monitoring point, and the analysis module includes:

[0032] The second determination submodule is used to determine the mass cloud diagram at the same height at different times based on the solution escape velocity data at different times at the same height monitoring point;

[0033] The second molecular submodule is used to analyze each of the mass cloud diagrams to obtain the escape and diffusion law of the solution.

[0034] In a third aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the solution escape law analysis method of the above-mentioned unsymmetrical dimethylhydrazine storage device are implemented.

[0035] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the solution escape law analysis method of the above-mentioned unsymmetrical dimethylhydrazine storage device are implemented.

[0036] The present application provides a method, device, computer equipment and storage medium for analyzing the solution escape law of an unsymmetrical dimethylhydrazine storage device, by constructing a launch silo simulation model for the launch silo of the unsymmetrical dimethylhydrazine storage device; meshing the launch silo simulation model; after setting boundary conditions, simulating solution data on the launch silo simulation model after meshing to obtain solution escape data; analyzing the solution escape data to obtain the solution escape diffusion law. In the solution escape law analysis scheme for the unsymmetrical dimethylhydrazine storage device provided in the present application, by constructing a simulation model of the launch silo and performing network partitioning, the diffusion details after the leakage of unsymmetrical dimethylhydrazine can be more accurately calculated, which is conducive to more accurate simulation of the diffusion process after the leakage of unsymmetrical dimethylhydrazine. The boundary conditions are set to simulate the operating conditions of the actual launch silo to ensure the accuracy of the simulation results. After setting the boundary conditions, the solution data simulation is performed on the launch silo simulation model after meshing. Through the numerical simulation method, the flow, diffusion and escape process after the solution leak is calculated to obtain solution escape data, thereby accurately analyzing the solution escape law of the liquid propellant, improving the safety of the liquid propellant in transportation, storage, filling and use, and reducing the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A diagram illustrating the application environment of the method for analyzing the solution escape pattern of an unsymmetrical dimethylhydrazine storage device provided in an embodiment of the present application;

[0039] Figure 2 A flow chart of a method for analyzing the escape pattern of a solution from an unsymmetrical dimethylhydrazine storage device provided in an embodiment of the present application;

[0040] Figure 3 A schematic diagram of the structure of a launch silo simulation model provided in an embodiment of the present application;

[0041] Figure 4 Experimental equipment for small-scale experiments provided in the embodiments of this application;

[0042] Figure 5 A cross-sectional structural diagram of a closed reactor in the experimental equipment for a small-scale experiment provided in an embodiment of the present application;

[0043] Figure 6 A schematic diagram of the structure of the launch silo simulation model after grid division provided in an embodiment of the present application;

[0044] Figure 7 This is a graph showing the change in the amount of UDMH escaping over time at different concentrations provided in the examples of the present application;

[0045] Figure 8 A line graph showing the maximum escape amount of unsymmetrical dimethylhydrazine at different concentrations provided in the examples of this application;

[0046] Figure 9 This is a graph showing the change in the rate of unsymmetrical dimethylhydrazine over time at different concentrations for the first 240 seconds provided in the examples of this application;

[0047] Figure 10 This is the regression curve of the maximum escape amount of unsymmetrical dimethylhydrazine at different concentrations provided in the examples of this application;

[0048] Figure 11 The maximum escape rate regression curve of unsymmetrical dimethylhydrazine at different concentrations provided in the examples of this application;

[0049] Figure 12 This is a graph showing the mass fraction of UDMH gas at different altitudes provided in the embodiment of the present application;

[0050] Figure 13 The overall quality cloud map provided by the embodiment of this application;

[0051] Figure 14 This is a mass cloud diagram of the UDMH gas concentration at different times at a height of 2 m provided in the embodiment of the present application;

[0052] Figure 15 A structural block diagram of a device for analyzing the escape pattern of a solution from an unsymmetrical dimethylhydrazine storage device provided in an embodiment of the present application;

[0053] Figure 16 This is a structural block diagram of the computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0055] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0056] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0057] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0058] The solution escape law analysis method of the UDMH storage device provided in the embodiment of the present invention can be applied to Figure 1 In the application environment. Among them, the computer device 110 communicates with the server 120 through the network 130. The computer device 110 can construct a launch silo simulation model for the launch silo of the UDMH storage device; mesh the launch silo simulation model; after setting the boundary conditions, simulate the solution data of the launch silo simulation model after meshing to obtain solution escape data; analyze the solution escape data to obtain the solution escape diffusion law, and display it through the computer device 110. In the present invention, by constructing a simulation model of the launch silo and performing network division, the diffusion details after the leakage of UDMH can be more accurately measured, which is conducive to more accurate simulation of the diffusion process after the leakage of UDMH. The boundary conditions are set to simulate the operating conditions of the actual launch silo to ensure the accuracy of the simulation results. After setting the boundary conditions, the solution data simulation is performed on the launch silo simulation model after meshing. Through the numerical simulation method, the flow, diffusion and escape process after the solution leak is calculated to obtain the solution escape data, thereby accurately analyzing the solution escape law of the liquid propellant, improving the safety of the liquid propellant in the transportation, storage, filling and use links, and reducing the risk of leakage. The computer device 110 may be, but is not limited to, various smart phones 110 - 1 , tablet computers 110 - 2 , and notebook computers 110 - 3 . The present invention will be described in detail below through specific embodiments.

[0059] See also Figure 2 As shown, Figure 2 A flow chart of a method for analyzing the escape patterns of a solution from an UDMH storage device provided in an embodiment of the present invention. This method can be applied to both a terminal and a server. This embodiment uses the server as an example. The method includes the following steps:

[0060] S101: Constructing a launch silo simulation model for the launch silo of the UDMH storage device.

[0061] Among them, liquid propellant storage equipment refers to containers and related systems used to store and manage liquid propellants.

[0062] A silo simulation model is a virtual model constructed using computer simulation technology. It is used to study and analyze the leakage and diffusion patterns, safety characteristics, and related physical phenomena of liquid propellant storage equipment in a silo. This model typically incorporates computational fluid dynamics (CFD) and finite element analysis (FEA) techniques to simulate the formation of liquid pools, vapor diffusion, environmental impacts, and potential hazardous areas after a propellant leak.

[0063] According to the actual structure and size of the launch silo, a launch silo simulation model can be constructed using three-dimensional modeling software (such as SolidWorks, ANSYS Space Claim).

[0064] Fluent is a simulation software that uses computational fluid dynamics (CFD) methods. At present, with the improvement of UDMH storage equipment, the possibility of large-scale leakage has been greatly reduced, so the safety risks are more concentrated on accidents such as small hole leakage and leakage. In one embodiment, in order to better meet the actual risk control needs, the leakage port diameter of the launch silo simulation model is preferably 4mm, and the launch silo simulation model is constructed in combination with the actual data of the rocket (such as the American Hercules series rocket). For example, Figure 3 As shown, in this silo simulation model, liquid propellant leaks from the connection between the tank and the refueling pipe and flows down the tank to the bottom. The leak then triggers a water spray system, forming a concentration of UDMH solution at the bottom of the cylinder. The entire silo is abstracted as a cylinder 30 meters high and 8 meters in diameter at the bottom, with the air inlet located at the top and the air outlet at the bottom. The missile and propellant tanks stored within are simplified as cylinders 27 meters high and 4 meters in diameter, embedded in the center of the silo. The leak point is 2 meters above the tank, and the leak hole has a diameter of 4 mm. The resulting UDMH solution forms a circular pool at the bottom of the silo due to the water spray.

[0065] The actual data can be based on the data released in the U.S. Hercules 2 leak incident. The storage space is cylindrical, 30 meters high and 8 meters wide. The overall height of the missile is 27 meters and the bottom diameter is about 4 meters. The actual geometric data of the storage of unsymmetrical dimethylhydrazine in a confined space is reduced by a ratio of 300:1 to construct the experimental equipment. The experimental environment temperature is 25°C (the storage temperature of unsymmetrical dimethylhydrazine is 5°C-35°C), the humidity is 70%, and the ambient pressure is normal atmospheric pressure. Due to the limitations of the experimental environment, the experiment was carried out indoors and the influence of wind speed was not considered. The concentrations of the unsymmetrical dimethylhydrazine solution tested in the experiment were 2g / L, 1g / L, 0.5g / L, and 0.2g / L. As Figure 4 As shown in the figure, the experimental equipment mainly includes four parts: constant temperature heating jacket a, closed reactor b, unsymmetrical dimethylhydrazine detector c, and waste gas recovery bottle d. The cross-sectional structure diagram of closed reactor b is shown in the figure. Figure 5 shown.

[0066] The constant-temperature heating jacket monitors the internal temperature of the sealed reactor in real time and maintains it at the set temperature, ranging from room temperature to 200°C. The sealed reactor, manufactured to the experimental design, houses a circular glass container containing UDMH solution with a liquid surface area of 7.065 cm². The gas delivery tube is a 30 cm long flexible film tube, which is flushed with abundant pure water after each experiment to ensure that no UDMH gas residue remains. The handheld UDMH gas detector has a range of 0-1000 ppm and an accuracy of 0.1 ppm, meeting the experimental measurement requirements. The waste gas recovery bottle consists of a hard rubber stopper, a glass tube, and a conical flask. The bottle contains a 10 g / L oxalic acid solution to absorb the waste gas generated during the experiment. The main chemicals used in the experiment include UDMH, pure water, and oxalic acid. For specific specifications, see the summary table of chemicals used in the UDMH escape experiment (Table 1).

[0067]

[0068] Table 1

[0069] In order to further ensure the reliability of the experimental results, the following measures were taken during the experiment:

[0070] In order to prevent other ions or impurities in the water from affecting the escape of UDMH, the solutions were prepared with pure water.

[0071] The UDMH gas detector used in this experiment has a range of 0-1000ppm and an accuracy of 0.1ppm. To ensure that the UDMH escape concentration during the experiment did not exceed the detector's range, multiple experiments determined that the maximum UDMH concentration was 10g / L and the minimum was 0.05g / L.

[0072] The toxic gas evaporated from UDMH and the toxic gas escaping from the solution obeys the governing equations of conservation of mass, conservation of momentum, and conservation of energy during diffusion. In addition, the turbulence model should be further considered to make the calculation results more consistent with the actual leakage situation. The leaked and escaped toxic gas mainly relies on the turbulence of the air to diffuse. The unsteady equations commonly used to control the diffusion process mainly include the mass equation, momentum equation, energy equation, and component transport equation. The basic equation is to regard different particles in the air as incompressible fluid motion. The specific equation formula is as follows:

[0073]

[0074] Where ρ is the fluid density; φ is a universal variable that can represent parameters such as velocity, temperature, and composition; μ represents the dynamic viscosity, with the unit being N·s / m2; Γ is the generalized diffusion coefficient; and S is the generalized source term. In different unsteady equations, φ, Γ, and S represent different meanings. Equation for calculating the evaporation of unsymmetrical dimethylhydrazine. Previous researchers obtained the evaporation rate (v) by measuring the actual evaporation of unsymmetrical dimethylhydrazine in natural environments. UDMH ,kg / (m 2 The calculation formula of s) is as follows:

[0075]

[0076] Where t represents the duration of the evaporation process in seconds; Psf represents the saturated vapor pressure of UDMH in Pa; P represents the atmospheric pressure in the external environment in Pa; u represents the wind speed at the accident point in m / s; usf represents the wind speed during the experiment in m / s. Since the mass unit used in the escape process of UDMH is mg and the area unit is cm 2 Therefore, the calculated evaporation rate needs to be reconverted. The unit of the converted evaporation rate is mg / (cm 2 ·s).

[0077] v UDMH =v' UDMH ×10 2

[0078] The escape patterns of UDMH within a confined space under specific conditions were determined, and it was found that both the escape rate and the amount of UDMH were affected by the UDMH concentration. Therefore, under the conditions of 25°C and 70% humidity, when the UDMH concentration is x (g / L) and the evaporation area is S (cm²), the escape rate v" (mg / (cm²·s)) is calculated as follows:

[0079]

[0080] Where, S is the surface area of UDMH solution after leakage; Ssf is the surface area of the UDMH solution in the experiment, in cm 2 ; V Z is the total volume of the experimental apparatus, in m 3 .

[0081] S102: Meshing the silo simulation model.

[0082] Meshing technology can be used to mesh the silo simulation model. Meshing technology is a key step in computational fluid dynamics (CFD) and finite element analysis (FEA), which is used to discretize the complex silo simulation model into a set of small units suitable for numerical calculation.

[0083] Optionally, CFD software (such as ANSYS Fluent) may be used to perform meshing on the silo simulation model.

[0084] Optionally, the launch silo simulation model can be meshed using a tetrahedron working network structure through meshing technology. The launch silo simulation model after meshing is as follows: Figure 6 shown.

[0085] Optionally, after meshing the silo simulation model, meshing technology can be used to perform local encryption in key areas (such as leak ports) and smoothing to improve calculation accuracy.

[0086] S103: After setting the boundary conditions, a solution data simulation is performed on the gridded silo simulation model to obtain solution escape data.

[0087] In one embodiment, the boundary conditions include a control equation, a mass flux inlet, a solid wall boundary, a solver, a time term, a time step, a numerical simulation model, and the temperature, humidity, and ambient pressure within the confined space.

[0088] For example, the temperature in the confined space may be set to 25° C., the humidity may be 70%, and the ambient pressure may be 101325 Pa.

[0089] In one embodiment, when leakage occurs on the flange contact surface of the container charging and discharging connection valve of the UDMH storage device, the method further comprises:

[0090] Get the leakage of the solution per unit time;

[0091] Obtain the liquid pool volume, silo bottom area, missile bottom area, and liquid pool height;

[0092] Calculating the concentration of the solution based on the volume of the liquid pool, the leakage rate per unit time, the bottom area of the silo, the bottom area of the missile, and the height of the liquid pool;

[0093] Calculating the volatilization rate of the bottom solution and the evaporation rate of the solution flowing out of the leakage port according to the concentration of the solution;

[0094] The boundary condition is set according to the volatilization rate and the evaporation rate.

[0095] Taking the example of a leak at the flange interface of the UDMH container's charging / discharging connection valve, after obtaining the UDMH leakage rate per unit time, Q, the leakage rate per unit time can be divided by the final liquid pool volume to obtain the leakage time. The liquid volume can be calculated as the product of the liquid pool area and the liquid pool depth. Then, based on the leakage time, the launch silo bottom area, the missile bottom area, and the liquid pool height, the solution concentration x (in g / L) is calculated using the following formula:

[0096]

[0097] Where t is the leakage time, in seconds; S1 is the bottom area of the silo; S2 is the bottom area of the missile; h y is the height of the liquid pool formed. Assuming that the pressure change in the container during the leakage process is ignored, the leakage rate remains unchanged. According to the above formula, assuming that the confined space is at normal atmospheric pressure, the leakage time is 10 seconds, the liquid pool height is 1 cm, and the leakage per unit time Q = 5.9928 cm 3 Calculation, the final result is: x = 0.1997g / L.

[0098] Knowing the concentration of the formed liquid pool, the evaporation rate of the bottom liquid pool can be calculated to be 315.4381 mg / s. In addition, the evaporation rate of the unsymmetrical dimethylhydrazine flowing out of the leak can be calculated to be 47.1267 mg / s.

[0099] The calculation formula for the evaporation rate of the bottom liquid pool is expressed as:

[0100]

[0101] y=4.5027ln(x)+10.602

[0102] R 2 =0.9263

[0103] Where v” is the volatilization rate, S is the surface area of UDMH solution after the actual leakage; S sf is the surface area of the UDMH solution in the experiment, in cm 2 ; V Z is the total volume of the experimental apparatus, in m 3 .

[0104] The calculation formula for the evaporation rate of UDMH flowing out of the leak is:

[0105]

[0106] v UDMH =v' UDMH ×10 2

[0107] Where, v UDMH represents the evaporation rate of UDMH, t represents the duration of the evaporation process in seconds; P sf represents the saturated vapor pressure of UDMH, in Pa; P represents the atmospheric pressure in the external environment, in Pa; u represents the wind speed at the accident point, in m / s; u sf It is expressed as the wind speed in the experiment, in m / s. Since the mass unit used in the escape process of UDMH is mg and the area unit is cm 2 Since the mass unit used in the escape process of UDMH is mg and the area unit is cm 2 Therefore, the calculated evaporation rate needs to be reconverted. The unit of the converted evaporation rate is mg / (cm 2 ·s), so v' UDMH Indicates the evaporation rate after unit conversion.

[0108] Based on the calculation results, using Fluent, the leak port and the annular liquid pool at the bottom of the silo were set as two mass flow inlets in the Boundary Conditions interface, with a type of Mass Flow Inlet and a temperature of 25°C. All other boundaries were set to solid walls by default. In the Fluent solver settings, the pressure-based implicit solver was selected, and the time term was set to Unsteady. The Large Eddy Simulations model was used, and an incompressible fluid was selected. The silo wall and the walls of the UDMH container were adiabatic and no-slip, and were treated using standard wall functions. Numerical simulation models, such as the component transport model, were used to simulate the diffusion of the toxic gas. Due to the limited space, the air distribution was assumed to be uniform, and air stratification and stability were not considered. The governing equations were discretized using a first-order upwind scheme, the pressure interpolation scheme used a standard pressure interpolation scheme, and the pressure-velocity coupling algorithm used the PISO algorithm. The time step was set to 1 second, and the total computation time was 600 seconds, consistent with the experimental time.

[0109] In one embodiment, obtaining the leakage amount of the solution per unit time includes:

[0110] Obtain leakage gap, pressure difference between inside and outside of confined space, solution viscosity, and flange inner diameter to outer diameter ratio;

[0111] The leakage rate per unit time is calculated based on the leakage gap, the pressure difference between the inside and outside of the confined space, the viscosity of the solution, and the ratio of the inner diameter to the outer diameter of the flange.

[0112] Taking the leakage of the flange contact surface at the filling and discharge connection valve of the UDMH container as an example, the calculation formula for the leakage of UDMH per unit time is:

[0113]

[0114] Where Q is the leakage per unit time, in cm3 / s; h is the leakage gap, in cm; Δp is the internal and external pressure difference, in Pa; η is the viscosity of UDMH, in Pa·s; r1 / r2 represents the ratio of the flange inner diameter to the outer diameter.

[0115] According to the above formula, assuming normal atmospheric pressure inside, a leakage time of 10 seconds, and a liquid pool height of 1 cm, the final calculation result is: Q = 5.9928 cm 3 .

[0116] In one embodiment, after setting the boundary conditions, performing solution data simulation on the gridded silo simulation model to obtain solution escape data includes:

[0117] Obtain the solution escape data per unit area;

[0118] After setting the boundary conditions, solution data simulation is performed on the gridded silo simulation model based on the unit area solution escape data to obtain solution escape data.

[0119] The solution escape data per unit area are the escape amount and escape velocity of the UDMH solution per unit area obtained through small-scale experiments.

[0120] In one embodiment, at the same time, the escape diffusion equation of the UDMH solution can be obtained by fitting the escape data of the solution per unit area to verify the reliability and effectiveness of the simulation.

[0121] Unsymmetrical dimethylhydrazine secondary escape C UDMH,t , mg / m3, represents the cumulative escaped UDMH within a certain period of time (t) after the liquid pool is formed. The value x (i.e., the UDMH concentration in the gaseous space) is directly measured by the gas detector. In order to facilitate the input of the silo simulation model, the measurement unit needs to be converted from ppm to mg / m 3 , the specific conversion formula is as follows:

[0122]

[0123] Where V UDMH is the volume of the escaped UDMH; VZ is the total volume of the experimental instrument; n is the amount of UDMH that escapes; M UDMH is the molar mass of the escaped UDMH; since the experimental temperature is 25 degrees Celsius, the molar volume of the gas is 24.5 mol / L.

[0124] After conducting experiments on four concentrations of UDMH solutions, namely 2g / L, 1g / L, 0.5g / L and 0.2g / L, the experimental data results were sorted out, as shown in the following figure: Figure 7 As shown, the escape amount C of UDMH at different concentrations is provided. UDMH,t A graph showing changes over time.

[0125] Depend on Figure 7 From the curve graphs corresponding to the four groups of experimental data with different concentrations, we can see that although the concentrations of UDMH are different, the trends of the escape amount changing with time are similar and can be roughly divided into three stages.

[0126] The first stage is a rapid increase, during which the amount of UDMH escaping rapidly rises to a maximum over time. At the beginning of the experiment, the concentration of UDMH in the gas phase is zero, so a large amount of UDMH continuously escapes from the solution into the gas phase. The second stage is a gradual decrease, during which the amount of UDMH escaping decreases over time. Due to point source detection, the gas will undergo localized agglomeration in the early stages of the escape, but this phenomenon will gradually disappear over time. The third stage is a stable stage. After entering this stage, the amount of UDMH escaping remains basically unchanged over time, or alternates between small increases and decreases, and tends to be stable overall, indicating that the escape status has reached equilibrium within the confined space.

[0127] From the perspective of safety engineering, "extreme value" usually refers to the maximum or minimum value that may appear in a set of data or a process. These values are of great significance to the safety and reliability of the system under extreme conditions. Therefore, from the perspective of safety engineering, calculating the maximum escape quantity can provide a reference for the formulation and revision of relevant safety measures. MAX , specifically defined as follows:

[0128]

[0129] Depend on Figure 8 As can be seen from the experimental conditions of the small-scale experiment, the maximum escape rate increases with increasing UDMH concentration. The maximum escape rates for UDMH solutions at concentrations of 2g / L, 1g / L, 0.5g / L, and 0.2g / L are 574.22mg / m³, 363.71mg / m³, 283.55mg / m³, and 217.34mg / m³, respectively. This indicates that under constant temperature and environmental conditions, the maximum escape rate increases with increasing UDMH concentration.

[0130] The UDMH escape rate v represents the UDMH escape rate at time t, which can be obtained from the escape amount C UDMH,t It is obtained by differentiating the corresponding time t, and the unit is mg / (m3·s)

[0131]

[0132] In order to better illustrate the effect of UDMH concentration on the escape rate of UDMH, Figure 9 As shown, the curve of the change of the rate of unsymmetrical dimethylhydrazine with time under different concentrations in the first 240 seconds is provided. Figure 9 It can be seen that the change of the escape rate is concentrated in the first two stages of UDMH escape. When it reaches the stable stage, the escape rate approaches zero.

[0133] Although the curves oscillate somewhat in the middle, the overall UDMH escape rates show a similar trend: a rapid rise to a maximum value followed by a gradual decline and approaching zero. The maximum escape rate increases with increasing UDMH concentration, and all occur around the first 50 seconds of the experiment. The maximum escape rates for UDMH solutions at concentrations of 2 g / L, 1 g / L, 0.5 g / L, and 0.2 g / L are 14.84 mg / (m³·s), 8.81 mg / (m³·s), 7.82 mg / (m³·s), and 3.69 mg / (m³·s), respectively.

[0134] Since the concentration of UDMH has an impact on both the maximum escape amount and the maximum escape rate, the correlation between the concentration of UDMH and the maximum escape amount and the maximum escape rate was fitted and analyzed, and the following results were obtained: Figure 10 The maximum escape amount regression curve of UDMH at different concentrations is shown.

[0135] Using a univariate regression algorithm, it was found that there was a linear functional relationship between the maximum escape amount y (mg / m3) and the UDMH concentration x (g / L), with a regression determination coefficient R2 of 0.9975, indicating a high goodness of fit. The specific functional relationship is expressed as:

[0136] y=196.26x+178.14

[0137] R 2 =0.9975

[0138] like Figure 11 The regression curves of the maximum escape rate of UDMH at different concentrations are shown. The fitting analysis between the maximum escape rate y (mg / (m3·s)) and the UDMH concentration x (g / L) shows that the two have a logarithmic functional relationship, with a regression determination coefficient R2 of 0.9263, indicating a good fitting effect. The specific functional relationship is expressed as:

[0139] y=4.5027ln(x)+10.602

[0140] R 2 =0.9263

[0141] S104: Analyze the solution escape data to obtain the solution escape diffusion law.

[0142] Based on the actual leak size, simulation calculations were performed using the escape velocity of the UDMH solution obtained from previous small-scale experiments as input data. The diffusion patterns of UDMH escaping toxic gas, known as the solution's diffusion patterns, were analyzed from two dimensions: time and altitude. This was used to develop an emergency response plan for UDMH leaks. For example, based on this diffusion pattern, personnel in the leak area and downwind were quickly evacuated to ensure they were away from areas with high concentrations of toxic vapor.

[0143] In one embodiment, the solution escape data includes solution escape velocity data at different height monitoring points, and the solution escape data is analyzed to obtain the solution escape diffusion law, including:

[0144] Determining monitoring curves at different height monitoring points based on solution escape velocity data at different height monitoring points;

[0145] Analyze a plurality of the monitoring curves to obtain the escape and diffusion law of the solution.

[0146] Analysis of concentration at different heights at the same time: By constructing a proportional model, monitoring points are set at four different heights of the tank: 1m (human breathing height), 2m (leakage point height), 5m and 10m. The trend of UDMH gas concentration over time at the height is calculated. The monitoring data curve is as follows: Figure 12 As shown, the mass fraction of UDMH gas at different altitudes is displayed.

[0147] By analyzing the monitoring data curves, it can be found that the solution escape diffusion law is as follows: the monitoring curves at heights of 1m and 2m can be divided into two stages. The first stage is a rapid increase stage, in which the concentration of UDMH gas increases rapidly over time from time zero; the second stage is a stabilization stage. When the UDMH gas concentration approaches the equilibrium concentration, the growth rate of the UDMH gas concentration at this height will gradually slow down and finally stabilize. By comparing the monitoring curves at a height of 1m with the monitoring curves at a height of 2m, it can be found that the closer the height is to the annular liquid pool, the faster the increase rate in the first stage, and the faster it enters the stable state. This shows that the secondary escape of UDMH significantly affects the concentration of toxic gases in the environment. The monitoring curves at heights of 5m and 10m can be divided into three stages. The first stage is the stop stage. Since it is not between the leakage point and the annular liquid pool, the concentration of UDMH gas does not increase from time zero. The concentration of UDMH gas is zero during this stage. The second stage is the rapid increase stage. The concentration of UDMH gas rises rapidly with time. The third stage is the stabilization stage. Due to the limitation of calculation time, this stage does not appear in the curve. It can be inferred that a stable concentration will inevitably appear with the passage of time. The main difference between the two different monitoring curves is the presence or absence of the first stage, and the trend is obvious, and the difference time is relatively long. When the height of the leakage source is different, monitors set at different heights will show different monitoring curves, which can effectively point out the specific location of the leakage point and provide data for subsequent rescue activities. At the same time, the molecular weight of UDMH is larger than the average molecular weight of air, and it belongs to the category of heavy gas. The toxic gas produced by the leakage is more likely to gather at the bottom. This feature will make the difference between the two different monitoring curves more obvious. Figure 13 The overall mass cloud distribution after 600s calculation shows that the closer to the annular liquid pool, the higher the concentration of UDMH gas. The heights of the four cross sections in the figure are 1m, 2m, 5m and 10m respectively. This concentration gradient increases the difficulty of subsequent leak repair and rescue.

[0148] In one embodiment, the solution escape data includes solution escape velocity data at different times at the same height monitoring point, and the solution escape data is analyzed to obtain the solution escape diffusion law, including:

[0149] Determine the mass cloud diagram at the same height at different times based on the solution escape velocity data at different times at the same height monitoring point;

[0150] Each mass cloud diagram is analyzed to obtain the escape and diffusion law of the solution.

[0151] After a solution leaks, personal safety should always be prioritized. Based on this, we can conduct concentration analysis at the same height at different times: In this simulation, it is assumed that 2m is the height of the leak point, which is also the height where the rescuers are located during subsequent rescue activities. The change in toxic gas concentration at this height can provide a strong reference for the selection of subsequent protective measures. Therefore, the silo simulation model further calculated the mass cloud diagram at a height of 2m at four times: 10s, 50s, 100s, and 150s. The mass cloud diagrams of the UDMH gas concentration at different times at a height of 2m are shown below. Figure 14 shown.

[0152] Analysis of the mass cloud distribution reveals that, within 30 seconds of the leak, UDMH gas at a height of 2 meters was primarily generated by the leak point, with very low concentrations outside the immediate vicinity. Over time, 50 seconds after the leak, UDMH concentrations in areas other than the leak point became uniform. During this period, UDMH gas generated by the annular liquid pool dominated, maintaining an overall stable trend. This indicates that, beyond the initial leak phase, UDMH gas generated by secondary escape from the annular liquid pool, rather than evaporation from the leak point, significantly impacted overall UDMH concentrations at a height of 2 meters. This suggests that, once inside the leak environment, both frontline rescuers performing leak repairs and support personnel providing technical support face similar toxic gas risks. Protective measures for both types of personnel should be consistent to effectively protect the lives of rescuers. At the same time, this result also reflects the shortcomings of the existing rescue plan. The leak repair activities and waste liquid treatment activities cannot be completely separated. Instead, the waste liquid that has been generated should be drained and treated as much as possible during the rescue activities. On the one hand, this provides more time for rescue and leak repair activities, and on the other hand, it also reduces the damage of harmful substances to the environment.

[0153] The application is carried out small-scale experiment and simulation analysis by the escape phenomenon after the leakage of unsymmetrical dimethylhydrazine in cylindrical confined space, and the influence of the secondary escape phenomenon of unsymmetrical dimethylhydrazine (that is, solution escape diffusion law) on the development of accident and rescue activities is obtained. First, after experimental measurement, the annular liquid pool formed after the unsymmetrical dimethylhydrazine leakage accident is subjected to escape phenomenon, and the maximum escape rate and maximum escape amount of unsymmetrical dimethylhydrazine gas are positively correlated with the liquid pool concentration. This shows that the more in the accident with larger leakage amount, the current situation of the secondary escape of unsymmetrical dimethylhydrazine is more worthy of attention, and can have a strong impact on the subsequent development of accident and rescue activities. Secondly, as can be seen from the result of simulation calculation, the closer the unsymmetrical dimethylhydrazine gas concentration is to the bottom liquid pool in cylindrical confined space, the higher the gas concentration is, and the unsymmetrical dimethylhydrazine gas is mainly produced by the bottom annular liquid pool, and this is the main height for rescue personnel to carry out activities, which has produced a huge threat to the life and health safety of relevant personnel, and has also caused adverse effects for the rescue activities of later generations. Finally, analysis of the simulation data reveals distinct trends in the mass fraction of UDMH gas at different heights after water spraying. The significant trend differences and long lag times between the two different monitoring curves provide effective data support and guidance for accurately locating the height of the leak source and narrowing the scope of leak repair.

[0154] The above is the solution escape law analysis process of the unsymmetrical dimethylhydrazine storage device of this application.

[0155] As mentioned above, the present application provides a method, device, computer equipment and storage medium for analyzing the solution escape law of an unsymmetrical dimethylhydrazine storage device, by constructing a launch silo simulation model for the launch silo of the unsymmetrical dimethylhydrazine storage device; meshing the launch silo simulation model; after setting boundary conditions, simulating solution data on the launch silo simulation model after meshing to obtain solution escape data; analyzing the solution escape data to obtain solution escape diffusion law. In the solution escape law analysis scheme for the unsymmetrical dimethylhydrazine storage device provided in the present application, by constructing a simulation model of the launch silo and performing network division, the diffusion details after the leakage of unsymmetrical dimethylhydrazine can be more accurately calculated, which is conducive to more accurate simulation of the diffusion process after the leakage of unsymmetrical dimethylhydrazine. The boundary conditions are set to simulate the operating conditions of the actual launch silo to ensure the accuracy of the simulation results. After setting the boundary conditions, the solution data simulation is performed on the launch silo simulation model after meshing. Through the numerical simulation method, the flow, diffusion and escape process after the solution leak is calculated to obtain solution escape data, thereby accurately analyzing the solution escape law of the liquid propellant, improving the safety of the liquid propellant in transportation, storage, filling and use, and reducing the risk of leakage.

[0156] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0157] In one embodiment, a device for analyzing the solution escape pattern of an UDMH storage device is provided. The device for analyzing the solution escape pattern of an UDMH storage device corresponds to the method for analyzing the solution escape pattern of an UDMH storage device in the above embodiment. Figure 15 As shown, the solution escape law analysis device of the UDMH storage device includes:

[0158] Construction module 201 is used to construct a launch silo simulation model for the launch silo of the UDMH storage device;

[0159] A partitioning module 202 is configured to perform grid partitioning on the silo simulation model;

[0160] The simulation module 203 is used to perform solution data simulation on the gridded silo simulation model after setting boundary conditions to obtain solution escape data;

[0161] The analysis module 204 is used to analyze the solution escape data to obtain the solution escape diffusion law.

[0162] In the solution escape law analysis scheme of the unsymmetrical dimethylhydrazine storage device provided in the present application, a launch silo simulation model is constructed for the launch silo of the unsymmetrical dimethylhydrazine storage device; the launch silo simulation model is gridded; after setting the boundary conditions, the gridded launch silo simulation model is simulated for solution data to obtain solution escape data; the solution escape data is analyzed to obtain the solution escape diffusion law. In the solution escape law analysis scheme of the unsymmetrical dimethylhydrazine storage device provided in the present application, by constructing a simulation model of the launch silo and performing network division, the diffusion details after the leakage of unsymmetrical dimethylhydrazine can be more accurately measured, which is conducive to more accurate simulation of the diffusion process after the leakage of unsymmetrical dimethylhydrazine. The boundary conditions are set to simulate the operating conditions of the actual launch silo to ensure the accuracy of the simulation results. After setting the boundary conditions, the gridded launch silo simulation model is simulated for solution data. Through the numerical simulation method, the flow, diffusion and escape process after the solution leak is calculated to obtain the solution escape data, thereby accurately analyzing the solution escape law of the liquid propellant, improving the safety of the liquid propellant in transportation, storage, filling and use, and reducing the risk of leakage.

[0163] Optionally, in some embodiments of the present application, when leakage occurs on the flange contact surface of the container charging and discharging connection valve of the UDMH storage device, the device further comprises:

[0164] A first acquisition module is used to obtain the leakage volume of the solution per unit time;

[0165] The second acquisition module is used to obtain the liquid pool volume, the launch silo bottom area, the missile bottom area and the liquid pool height;

[0166] a first calculation module, configured to calculate the concentration of the solution based on the volume of the liquid pool, the leakage rate per unit time, the bottom area of the silo, the bottom area of the missile, and the height of the liquid pool;

[0167] a second calculation module, configured to calculate the volatilization rate of the bottom solution and the evaporation rate of the solution flowing out of the leakage port according to the concentration of the solution;

[0168] A setting module is used to set the boundary condition according to the volatilization rate and the evaporation rate.

[0169] Optionally, in some embodiments of the present application, the first acquisition module includes:

[0170] The first acquisition submodule is used to obtain the leakage gap, the pressure difference between the inside and outside of the confined space, the solution viscosity, and the ratio of the flange inner diameter to the outer diameter;

[0171] The calculation submodule is used to calculate the leakage per unit time based on the leakage gap, the pressure difference between the inside and outside of the confined space, the solution viscosity, and the ratio of the inner diameter to the outer diameter of the flange.

[0172] Optionally, in some embodiments of the present application, the boundary conditions include control equations, mass flux inlet, solid wall boundary, solver, time term, time step, numerical simulation model, and temperature, humidity and ambient pressure in the confined space.

[0173] Optionally, in some embodiments of the present application, the simulation module includes:

[0174] The second acquisition submodule is used to obtain the solution escape data per unit area;

[0175] The second simulation submodule is used to perform solution data simulation on the gridded silo simulation model based on the solution escape data per unit area after setting the boundary conditions to obtain solution escape data.

[0176] Optionally, in some embodiments of the present application, the solution escape data includes solution escape velocity data at different height monitoring points, and the analysis module includes:

[0177] A first determining submodule is used to determine monitoring curves of monitoring points at different heights based on the solution escape velocity data at the monitoring points at different heights;

[0178] The first analysis submodule is used to analyze the plurality of monitoring curves to obtain the escape and diffusion law of the solution.

[0179] Optionally, in some embodiments of the present application, the solution escape data includes solution escape velocity data at different times at the same height monitoring point, and the analysis module includes:

[0180] The second determination submodule is used to determine the mass cloud diagram at the same height at different times based on the solution escape velocity data at different times at the same height monitoring point;

[0181] The second molecular submodule is used to analyze each of the mass cloud diagrams to obtain the escape and diffusion law of the solution.

[0182] In one embodiment, a computer device is provided. The internal structure diagram of the computer device can be as follows: Figure 16 As shown. The computer device includes a processor, memory, network interface, display screen and input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external server via a network connection. When the computer program is executed by the processor, it implements the functions or steps of a method for analyzing the escape pattern of a solution of a unidirectional dimethylhydrazine storage device.

[0183] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:

[0184] A launch silo simulation model is constructed for the launch silo of the UDMH storage device; the launch silo simulation model is meshed; after setting boundary conditions, solution data simulation is performed on the meshed launch silo simulation model to obtain solution escape data; the solution escape data is analyzed to obtain the solution escape diffusion law.

[0185] In this embodiment, by constructing a simulation model of the launch silo and performing a meshing operation, the diffusion details after a UDMH leak can be more accurately described, facilitating a more precise simulation of the diffusion process after a UDMH leak. Boundary conditions are set to simulate the operating conditions of an actual launch silo to ensure the accuracy of the simulation results. After setting the boundary conditions, solution data simulation is performed on the meshed launch silo simulation model. Numerical simulation methods are used to calculate the flow, diffusion, and escape processes of the solution after a leak, generating solution escape data. This allows for accurate analysis of the solution escape patterns of liquid propellants, improving the safety of liquid propellants during transportation, storage, refueling, and use, and reducing the risk of leakage.

[0186] In one embodiment, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the following steps are implemented:

[0187] A launch silo simulation model is constructed for the launch silo of the UDMH storage device; the launch silo simulation model is meshed; after setting boundary conditions, solution data simulation is performed on the meshed launch silo simulation model to obtain solution escape data; the solution escape data is analyzed to obtain the solution escape diffusion law.

[0188] In this embodiment, by constructing a simulation model of the launch silo and performing a meshing operation, the diffusion details after a UDMH leak can be more accurately described, facilitating a more precise simulation of the diffusion process after a UDMH leak. Boundary conditions are set to simulate the operating conditions of an actual launch silo to ensure the accuracy of the simulation results. After setting the boundary conditions, solution data simulation is performed on the meshed launch silo simulation model. Numerical simulation methods are used to calculate the flow, diffusion, and escape processes of the solution after a leak, generating solution escape data. This allows for accurate analysis of the solution escape patterns of liquid propellants, improving the safety of liquid propellants during transportation, storage, refueling, and use, and reducing the risk of leakage.

[0189] It should be noted that the above functions or steps that can be implemented by the computer-readable storage medium or computer device can be found in the relevant descriptions of the server side and the client side in the aforementioned method embodiment. To avoid repetition, they will not be described one by one here.

[0190] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0191] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0192] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for analyzing the solution escape pattern of an unsymmetrical dimethylhydrazine storage device, characterized in that: The method comprises: Construct a launch silo simulation model for the launch silo of the UDMH storage device; Performing grid division on the silo simulation model; After setting the boundary conditions, the solution data simulation is performed on the gridded silo simulation model to obtain the solution escape data; The solution escape data is analyzed to obtain the solution escape diffusion law.

2. The method for analyzing the solution escape regularity of the UDMH storage device according to claim 1, wherein: In the event that leakage occurs on the flange contact surface of the container charging and discharging connection valve of the UDMH storage device, the method further comprises: Get the leakage of the solution per unit time; Obtain the liquid pool volume, silo bottom area, missile bottom area, and liquid pool height; Calculating the concentration of the solution based on the volume of the liquid pool, the leakage rate per unit time, the bottom area of the silo, the bottom area of the missile, and the height of the liquid pool; Calculating the volatilization rate of the bottom solution and the evaporation rate of the solution flowing out of the leakage port according to the concentration of the solution; The boundary condition is set according to the volatilization rate and the evaporation rate.

3. The method for analyzing the solution escape pattern of the liquid recommendation storage device according to claim 2, characterized in that: The amount of leakage per unit time of the solution obtained includes: Obtain leakage gap, pressure difference between inside and outside of confined space, solution viscosity, and flange inner diameter to outer diameter ratio; The leakage rate per unit time is calculated based on the leakage gap, the pressure difference between the inside and outside of the confined space, the viscosity of the solution, and the ratio of the inner diameter to the outer diameter of the flange.

4. The method for analyzing the solution escape regularity of the UDMH storage device according to claim 1, wherein: The boundary conditions include control equations, mass flux inlet, solid wall boundary, solver, time term, time step, numerical simulation model, and temperature, humidity and ambient pressure in the confined space.

5. The method for analyzing the solution escape regularity of the UDMH storage device according to claim 1, wherein: After setting the boundary conditions, the gridded silo simulation model is subjected to solution data simulation to obtain solution escape data, including: Obtain the solution escape data per unit area; After setting the boundary conditions, solution data simulation is performed on the gridded silo simulation model based on the unit area solution escape data to obtain solution escape data.

6. The method for analyzing the solution escape regularity of the UDMH storage device according to claim 1, wherein: The solution escape data includes solution escape velocity data at different height monitoring points. The solution escape data is analyzed to obtain the solution escape diffusion law, including: Determining monitoring curves at different height monitoring points based on solution escape velocity data at different height monitoring points; Analyze a plurality of the monitoring curves to obtain the escape and diffusion law of the solution.

7. The method for analyzing the solution escape regularity of the UDMH storage device according to claim 1, wherein: The solution escape data includes solution escape velocity data at different times at the same height monitoring point. The solution escape data is analyzed to obtain the solution escape diffusion law, including: Determine the mass cloud diagram at the same height at different times based on the solution escape velocity data at different times at the same height monitoring point; Each mass cloud diagram is analyzed to obtain the escape and diffusion law of the solution.

8. A device for analyzing the escape pattern of a solution of an unsymmetrical dimethylhydrazine storage device, characterized in that: include: A construction module for constructing a launch silo simulation model for a launch silo of an UDMH storage device; A partitioning module, configured to perform grid partitioning on the silo simulation model; The simulation module is used to simulate the solution data of the gridded silo simulation model after setting the boundary conditions to obtain the solution escape data; The analysis module is used to analyze the solution escape data to obtain the solution escape diffusion law.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method for analyzing the solution escape law of the unsymmetrical dimethylhydrazine storage device according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for analyzing the solution escape law of the UDMH storage device according to any one of claims 1 to 7 are implemented.

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