A method, device, equipment and medium for determining phase transition drainage capacity of an underwater vehicle

Abstract

The application relates to the technical field of drainage capacity calculation, and discloses a phase change drainage capacity determination method, device, equipment and medium for an underwater vehicle, a drainage tank of the underwater vehicle is connected with a drainage adjusting unit, the drainage adjusting unit controls the drainage of the drainage tank through volume change caused by phase change of a target drainage medium; the method comprises the following steps: performing phase change drainage calculation on the target drainage medium according to design working parameters of the underwater vehicle to obtain a theoretical drainage capacity of the underwater vehicle; performing medium energy loss calculation on a drainage process of the underwater vehicle according to structural design parameters of the underwater vehicle to obtain predicted phase change energy loss corresponding to the target drainage medium; and performing energy loss correction on the theoretical drainage capacity by using the predicted phase change energy loss to obtain an actual drainage capacity of the underwater vehicle. The method has the beneficial effect that the influence of the structural design of the underwater vehicle on the phase change of the target drainage medium is fully considered, and the accuracy of the obtained drainage capacity is improved.

Description

Technical Field

[0001] This application relates to the field of drainage capacity calculation technology, and in particular to a method, apparatus, equipment and medium for determining the phase change drainage capacity of an underwater vehicle. Background Technology

[0002] With the continuous development of underwater vehicle technology, underwater vehicles can flexibly change their buoyancy underwater by increasing or decreasing the amount of water stored in their drainage tanks, thereby altering their navigation state during underwater navigation. Determining the drainage capacity of an underwater vehicle based on its design parameters is a crucial step in the design process and is directly related to its safety during underwater navigation. In related technologies, the drainage capacity of an underwater vehicle is usually determined directly based on the volume of the medium used in the drainage regulating unit. However, this method cannot be applied to drainage regulating units that utilize the phase change of the drainage medium. Therefore, the accuracy of determining drainage capacity in related technologies still needs improvement. Summary of the Invention

[0003] This application provides a method, apparatus, equipment, and medium for determining the phase change drainage capacity of an underwater vehicle. It corrects the theoretical drainage capacity of the target drainage medium based on the energy loss caused by friction or heat exchange during the corresponding drainage process, fully considering the influence of the underwater vehicle's structural design on the phase change of the target drainage medium, and improving the accuracy of the obtained drainage capacity.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, embodiments of this application provide a method for determining the phase change drainage capacity of an underwater vehicle. The underwater vehicle's drainage chamber is connected to a drainage regulating unit, which uses a target drainage medium. The drainage regulating unit controls the drainage of the drainage chamber by controlling the volume change caused by the phase change of the target drainage medium. The method includes:

[0006] Phase change drainage calculations are performed on the target drainage medium based on the design operating parameters of the underwater vehicle to obtain the theoretical drainage capacity of the underwater vehicle; wherein, the design operating parameters are used to describe the working environment of the underwater vehicle when it is navigating underwater;

[0007] Based on the structural design parameters of the underwater vehicle, the energy loss of the medium during the drainage process of the underwater vehicle is calculated to obtain the predicted phase change energy loss corresponding to the target drainage medium; wherein, the predicted phase change energy loss is used to describe the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process when the underwater vehicle is navigating underwater.

[0008] The theoretical displacement capacity is corrected by using the predicted phase change energy loss to obtain the actual displacement capacity of the underwater vehicle.

[0009] The method for determining the phase change drainage capacity of an underwater vehicle proposed in this application calculates the energy loss of the medium based on the structural design parameters of the underwater vehicle, obtaining the predicted phase change energy loss of the target drainage medium during transportation. The predicted phase change energy loss is then used to correct the theoretical drainage capacity of the underwater vehicle when using the target drainage medium, thus obtaining the actual drainage capacity of the underwater vehicle. Compared with related technologies, this application considers the influence of the underwater vehicle's structural design on the target drainage medium after phase change, calculates the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process, and determines the actual extent to which the target drainage medium can be used for the volume change caused by phase change. This effectively improves the accuracy of the obtained drainage capacity and enhances the reliability of the underwater vehicle design process.

[0010] Optionally, the drainage regulating unit and the drainage chamber are connected via a transmission pipeline, and the structural design parameters include the pipeline structure parameters of the transmission pipeline and the chamber structure parameters of the drainage chamber; the step of calculating the medium energy loss during the drainage process of the underwater vehicle based on the structural design parameters of the underwater vehicle to obtain the predicted phase change energy loss corresponding to the target drainage medium includes:

[0011] Based on the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium, the energy loss during the transportation process of the target drainage medium in the transmission pipeline is calculated to obtain pipeline energy loss data.

[0012] Based on the chamber structure parameters and the chamber medium state parameters of the target drainage medium, the energy loss of the target drainage medium in the drainage chamber is calculated to obtain the chamber energy loss data.

[0013] The predicted phase change energy loss is obtained based on the pipeline energy loss data and the cabin energy loss data.

[0014] Optionally, the pipeline structure parameters include friction-line structure parameters and local structure parameters; the step of calculating the energy loss of the target drainage medium during its transport process in the transmission pipeline based on the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium to obtain pipeline energy loss data includes:

[0015] The flow friction characteristics of the target drainage medium are analyzed based on the frictional parameters along the pipeline structure and the pipeline medium state parameters to obtain the friction coefficient of the target drainage medium.

[0016] The friction coefficient and the frictional parameters along the target drainage medium are used to perform frictional calculations along the target drainage medium to obtain the frictional energy loss data of the target drainage medium.

[0017] Based on the local structural parameters and the pipeline medium state parameters, the local resistance of the target drainage medium is calculated to obtain the local energy loss data of the target drainage medium.

[0018] The pipeline energy loss data is obtained based on the energy loss data along the pipeline and the local energy loss data.

[0019] Optionally, the step of calculating the energy loss of the target drainage medium during the drainage process in the drainage tank based on the compartment structural parameters and the compartment medium state parameters of the target drainage medium to obtain compartment energy loss data includes:

[0020] The convective heat transfer characteristics of the target drainage medium are analyzed based on the chamber structure parameters and the chamber medium state parameters of the target drainage medium to obtain the convective heat transfer coefficient of the target drainage medium.

[0021] The heat exchange of the target drainage medium is calculated using the convective heat transfer coefficient and the compartment structural parameters to obtain the bulkhead energy loss data of the target drainage medium.

[0022] Optionally, the step of correcting the theoretical displacement capacity using the predicted phase change energy loss to obtain the actual displacement capacity of the underwater vehicle includes:

[0023] The energy loss ratio is obtained by proportionally calculating the predicted phase change energy loss and the phase change energy provided by the underwater vehicle to the target drainage medium.

[0024] The actual drainage capacity is obtained by correcting the theoretical drainage capacity using the energy loss ratio.

[0025] Optionally, the design operating parameters include the underwater vehicle's operating pressure data, operating temperature data, drainage medium density, and drainage medium load; the step of performing phase change drainage calculations on the target drainage medium based on the underwater vehicle's design operating parameters to obtain the underwater vehicle's theoretical drainage capacity includes:

[0026] Based on the working pressure data and the working temperature data, the target drainage medium is analyzed to determine its current state.

[0027] When the current medium condition meets the drainage working conditions, the phase change density of the target drainage medium is determined based on the working pressure data and the working temperature data, and the volume is converted based on the phase change density and the drainage medium load to obtain the theoretical drainage capacity; wherein, the drainage working conditions indicate that the target drainage medium is in a state that can be used for phase change drainage.

[0028] Optionally, the method further includes:

[0029] If the current medium condition does not meet the drainage working conditions, the drainage medium load of the underwater vehicle is increased, and the current medium condition of the target drainage medium is re-determined until the current medium condition meets the drainage working conditions.

[0030] Secondly, embodiments of this application provide a device for determining the phase change drainage capacity of an underwater vehicle. The drainage tank of the underwater vehicle is connected to a drainage adjustment unit. The drainage adjustment unit uses a target drainage medium and controls the drainage of the drainage tank by the volume change caused by the phase change of the target drainage medium. The device includes:

[0031] The theoretical drainage calculation module is used to perform phase change drainage calculations on the target drainage medium based on the design operating parameters of the underwater vehicle, so as to obtain the theoretical drainage capacity of the underwater vehicle; wherein, the design operating parameters are used to describe the working environment of the underwater vehicle when it is navigating underwater;

[0032] The energy loss calculation module is used to calculate the energy loss of the underwater vehicle during the drainage process based on the structural design parameters of the underwater vehicle, and to obtain the predicted phase change energy loss corresponding to the target drainage medium; wherein, the predicted phase change energy loss is used to describe the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process when the underwater vehicle is navigating underwater.

[0033] An energy loss correction module is used to correct the theoretical displacement capacity using the predicted phase change energy loss, so as to obtain the actual displacement capacity of the underwater vehicle.

[0034] Thirdly, embodiments of this application provide a computer device, including: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the method described in any of the above embodiments.

[0035] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer instructions, which are used to cause a computer to perform the method described in any one of the above embodiments.

[0036] Fifthly, embodiments of this application provide a computer program product, including computer instructions, which are used to cause a computer to perform the method described in any of the above embodiments. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A flowchart illustrating the steps of a method for determining the phase change drainage capacity of an underwater vehicle provided in an embodiment of this application;

[0039] Figure 2 This is a diagram illustrating the steps involved in predicting phase transition energy loss in an embodiment of this application.

[0040] Figure 3 This is a schematic diagram of the connection between the drainage regulating unit and the drainage chamber in an embodiment of this application;

[0041] Figure 4 This is a diagram illustrating the steps involved in obtaining pipeline energy loss data in an embodiment of this application.

[0042] Figure 5 This is a diagram illustrating the steps involved in obtaining bulkhead energy loss data in an embodiment of this application.

[0043] Figure 6 This is a diagram illustrating the steps involved in obtaining the actual drainage capacity in an embodiment of this application.

[0044] Figure 7 This is a diagram illustrating the steps involved in obtaining the theoretical drainage capacity in an embodiment of this application.

[0045] Figure 8 A block diagram of a device for determining the phase change drainage capacity of an underwater vehicle provided in an embodiment of this application;

[0046] Figure 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] With the continuous development of underwater vehicle technology, underwater vehicles can flexibly change their buoyancy underwater by increasing or decreasing the amount of water stored in their drainage tanks, thereby altering their navigation state during underwater operations. Determining the drainage capacity of an underwater vehicle based on its design parameters is a crucial step in the design process and is directly related to its safety during underwater navigation. By determining the drainage capacity, ensuring that the underwater vehicle possesses sufficient capacity to adjust its buoyancy, the safety of underwater navigation is improved.

[0049] In related technologies, drainage regulating units typically use drainage media such as compressed air or direct pump drive to drain water. Since these drainage media do not undergo phase changes or other changes during the drainage process, the drainage capacity of underwater vehicles that use the aforementioned drainage regulating units to control drainage is usually determined directly based on the volume of the medium used by the drainage regulating unit.

[0050] However, the same method cannot be applied to drainage control units that utilize the phase change of the drainage medium for drainage. These units rely on the phase change of the drainage medium to cause a volume change, thereby controlling the drainage tank's drainage. During the phase change, the drainage medium typically absorbs a significant amount of energy to achieve this volume change. As the drainage medium travels to the drainage tank, it comes into contact with the underwater vehicle's internal structures, and the heat exchange between these structures causes energy loss, leading to volume compression. This volume change directly affects the underwater vehicle's drainage capacity. Directly using methods from related technologies fails to comprehensively account for the energy loss during the drainage medium's transport, resulting in reduced accuracy of the obtained drainage capacity, limiting the underwater vehicle's design efficiency, and also impacting its safety.

[0051] To address the aforementioned issues, this application provides a method, apparatus, device, and medium for determining the phase change drainage capacity of an underwater vehicle. The underwater vehicle's drainage tank is connected to a drainage adjustment unit, which controls drainage by controlling the drainage tank's drainage through volume changes caused by the phase change of the target drainage medium. The method includes: performing phase change drainage calculations on the target drainage medium based on the underwater vehicle's design operating parameters to obtain the underwater vehicle's theoretical drainage capacity; calculating the energy loss of the medium during the underwater vehicle's drainage process based on the underwater vehicle's structural design parameters to obtain the predicted phase change energy loss corresponding to the target drainage medium; and using the predicted phase change energy loss to correct the theoretical drainage capacity, thereby obtaining the underwater vehicle's actual drainage capacity.

[0052] The method for determining the phase change drainage capacity of an underwater vehicle provided in this application calculates the energy loss of the medium based on the structural design parameters of the underwater vehicle, obtains the predicted phase change energy loss of the target drainage medium during transportation, and uses the predicted phase change energy loss to correct the theoretical drainage capacity of the underwater vehicle when using the target drainage medium, thereby obtaining the actual drainage capacity of the underwater vehicle.

[0053] Compared with related technologies, this application considers the impact of the underwater vehicle's structural design on the target drainage medium after phase change, calculates the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process, and determines the actual extent to which the target drainage medium can be used for the volume change caused by phase change, thereby effectively improving the accuracy of the obtained drainage capacity and enhancing the reliability of the underwater vehicle design process.

[0054] The method for determining the phase change drainage capacity of underwater vehicles provided in this specification can be applied to underwater vehicles equipped with a drainage adjustment unit. This unit controls drainage from the drainage tank by controlling the volume change caused by the phase change of the target drainage medium. It is understood that the method for determining the phase change drainage capacity of underwater vehicles provided in this specification can be used for different types of underwater vehicles, including manned and unmanned underwater vehicles.

[0055] According to an embodiment of this application, a method for determining the phase change drainage capacity of an underwater vehicle is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0056] This embodiment provides a method for determining the phase change displacement capacity of an underwater vehicle, which can be used for the aforementioned underwater vehicle. (Refer to...) Figure 1As shown, the underwater vehicle's drainage tank is connected to a drainage adjustment unit. The drainage adjustment unit uses a target drainage medium and controls the drainage of the drainage tank by the volume change caused by the phase change of the target drainage medium. The method includes: S100. Performing phase change drainage calculation on the target drainage medium according to the underwater vehicle's design operating parameters to obtain the underwater vehicle's theoretical drainage capacity. The design operating parameters are used to describe the underwater vehicle's operating environment when it is navigating underwater.

[0057] S200. Calculate the energy loss of the underwater vehicle during its drainage process based on the structural design parameters of the underwater vehicle, and obtain the predicted phase change energy loss corresponding to the target drainage medium; wherein, the predicted phase change energy loss is used to describe the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process when the underwater vehicle is navigating underwater.

[0058] S300. The theoretical displacement capacity is corrected by predicting the phase change energy loss, thus obtaining the actual displacement capacity of the underwater vehicle.

[0059] The target drainage medium can be a medium with significant density differences between multiple phases. The target drainage medium is stored in the drainage regulating unit in the first phase. When the drainage regulating unit is activated to control the drainage tank's drainage, the target drainage medium receives energy and undergoes a phase transition to the second phase. It should be noted that the density of the target drainage medium in the second phase is much lower than that in the first phase; therefore, for the same mass of target drainage medium, its volume in the second phase is much larger than its volume in the first phase. After the target drainage medium changes to the second phase, it is transferred to the drainage tank through the connection structure between the drainage regulating unit and the drainage tank. The volume change caused by the phase transition is used to control the drainage tank's drainage, thereby adjusting the buoyancy of the underwater vehicle.

[0060] For example, the target drainage medium can be carbon dioxide. Carbon dioxide has a density of approximately 1.976 g / L in its gaseous state, approximately 770 g / L in its liquid state, and approximately 100 g / L to 600 g / L in its supercritical state. It can be seen that the density of carbon dioxide in its liquid state differs significantly from its density in its gaseous or supercritical states. When the target drainage medium is carbon dioxide, its first phase stored in the drainage regulating unit can be liquid, and the second phase after phase change can be gaseous or supercritical. When carbon dioxide changes from liquid to gaseous or supercritical state, its volume changes significantly, providing effective drainage capacity for the underwater vehicle. Furthermore, carbon dioxide has the characteristics of rapid conversion and safe, controllable operation, and does not cause environmental pollution.

[0061] Design operating parameters can be the preset operating conditions of an underwater vehicle, including parameters such as pressure and temperature during operation, used to describe the operating environment of the underwater vehicle during underwater navigation. Theoretical displacement capacity can be the displacement capacity obtained through volume change after a phase change of a target displacement medium of a set mass under preset operating conditions, which can be calculated based on the phase change of the underwater vehicle's design operating parameters.

[0062] Structural design parameters can be the geometric parameters of the mechanical structure in an underwater vehicle used to transport and discharge the target drainage medium. These parameters describe the flow state of the target drainage medium during transport within the mechanical structure, enabling the calculation of energy losses during transport. For example, the mechanical structure may include a transport pipeline. The structural design parameters of the pipeline may include its length, inner diameter, roughness, and inclination angle. These parameters allow for the calculation of energy losses during the flow of the target drainage medium within the pipeline.

[0063] Specifically, when designing an underwater vehicle, the total amount of the target drainage medium stored in the drainage adjustment unit can be preset. Based on the design operating parameters of the underwater vehicle, phase change drainage calculations are performed on the target drainage medium under a set operating environment to obtain the phase change volume of the target drainage medium after the phase change, which is taken as the theoretical drainage capacity of the underwater vehicle.

[0064] It should be noted that the underwater vehicle's drainage tank is connected to the drainage regulation unit. The target drainage medium within the drainage regulation unit undergoes a phase change and is then transported to the drainage tank via the connection structure. Upon entering the drainage tank, the system controls the drainage tank to discharge water. During this process, the target drainage medium comes into contact with the surfaces of these mechanical structures, resulting in energy loss due to friction or heat exchange. Understandably, this energy loss causes a drop in the temperature of the target drainage medium, leading to a reduction in its volume and consequently affecting its drainage capacity.

[0065] Furthermore, based on the structural design parameters of the aforementioned mechanical structures in the underwater vehicle, the potential energy loss of the target drainage medium when passing through these structures is predicted, yielding the predicted phase change energy loss for the target drainage medium. This predicted phase change energy loss allows for accurate understanding of the energy changes in the target drainage medium during the drainage process. The theoretical drainage capacity is then corrected based on the predicted phase change energy loss to obtain the actual drainage capacity of the underwater vehicle under conditions of energy loss. By correcting the theoretical drainage capacity of the underwater vehicle for energy loss, the accuracy of the obtained drainage capacity is improved, enhancing the reliability of the design process and ensuring the drainage capacity and safety of the underwater vehicle.

[0066] In some embodiments, the design parameters may include the phase transition temperature of the target drainage medium after phase transition, which can be determined based on the pre-designed normal temperature range of the underwater vehicle. After obtaining the actual drainage capacity of the underwater vehicle, a test is conducted in the test apparatus with the same parameters to obtain the test drainage capacity. The error between the actual drainage capacity and the test drainage capacity is calculated. If the error does not exceed the error threshold, it indicates that the actual drainage capacity is accurate. If the error exceeds the error threshold, and the actual drainage capacity is less than the test drainage capacity, it indicates that the predicted phase transition energy loss during the calculation is too large. In this case, the phase transition temperature can be adjusted by lowering the phase transition temperature to reduce the error between the actual drainage capacity and the test drainage capacity. Conversely, if the actual drainage capacity is greater than the test drainage capacity, it indicates that the predicted phase transition energy loss during the calculation is too small. In this case, the phase transition temperature can be adjusted by raising the phase transition temperature to reduce the error between the actual drainage capacity and the test drainage capacity.

[0067] The method for determining the phase change drainage capacity of an underwater vehicle provided in this embodiment calculates the energy loss of the medium based on the structural design parameters of the underwater vehicle, obtains the predicted phase change energy loss of the target drainage medium during transportation, and uses the predicted phase change energy loss to correct the theoretical drainage capacity of the underwater vehicle when using the target drainage medium, thereby obtaining the actual drainage capacity of the underwater vehicle.

[0068] Compared with related technologies, this application considers the impact of the underwater vehicle's structural design on the target drainage medium after phase change, calculates the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process, and determines the actual extent to which the target drainage medium can be used for the volume change caused by phase change, thereby effectively improving the accuracy of the obtained drainage capacity and enhancing the reliability of the underwater vehicle design process.

[0069] Reference Figure 2 As shown in one embodiment of this application, the drainage regulating unit and the drainage chamber are connected by a transmission pipeline. The structural design parameters include the pipeline structure parameters and the chamber structure parameters of the drainage chamber. Based on the structural design parameters of the underwater vehicle, the energy loss of the underwater vehicle during the drainage process is calculated to obtain the predicted phase change energy loss corresponding to the target drainage medium, including:

[0070] S210. Based on the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium, calculate the energy loss during the transportation process of the target drainage medium in the transmission pipeline to obtain pipeline energy loss data.

[0071] S220. Based on the compartment structural parameters and the compartment medium state parameters of the target drainage medium, calculate the energy loss of the target drainage medium during the drainage process in the drainage compartment to obtain the compartment energy loss data.

[0072] S230. Based on pipeline energy loss data and compartment energy loss data, the predicted phase change energy loss is obtained.

[0073] Reference Figure 3 As shown, the drainage regulating unit is connected to the drainage chamber via a transmission pipeline. This transmission pipeline can be a complex structure, and multiple local structures, such as valves, can be installed as needed. All of these mechanical structures will affect the flow of the target drainage medium and result in corresponding energy losses.

[0074] Specifically, based on different pipeline structure parameters, the target drainage medium may experience different flow states when flowing in the transmission pipeline. Under different flow states, the target drainage medium will incur different forms of energy loss. Therefore, it is necessary to calculate the energy loss during the transportation process of the target drainage medium in the transmission pipeline based on the pipeline medium state parameters of the target drainage medium. The pipeline medium state parameters of the target drainage medium can be represented by the Reynolds number, and its form is as follows:

[0075]

[0076] Where Re1 represents the pipeline medium state parameter; ρ represents the phase change density of the target drainage medium; v1 represents the flow velocity of the target drainage medium in the transmission pipeline; D represents the inner diameter of the transmission pipeline; and μ represents the dynamic viscosity of the target drainage medium. The density and dynamic viscosity of the target drainage medium can be obtained from a database query based on the design operating parameters of the underwater vehicle. For example, the database could be the NIST REFPROP database. The flow velocity of the target drainage medium in the transmission pipeline is expressed as follows:

[0077]

[0078] in, A represents the mass flow rate of the target drainage medium. p Let be the cross-sectional area of ​​the transmission pipeline, in the following form:

[0079]

[0080] Based on the numerical range of the pipeline medium state parameters, the flow state of the target drainage medium in the transmission pipeline can be determined: if Re1 < 2000, it indicates that the target drainage medium is in a laminar flow state in the transmission pipeline; if 2000 ≤ Re1 ≤ 4000, it indicates that the target drainage medium is in a transitional flow state in the transmission pipeline; if Re1 > 4000, it indicates that the target drainage medium is in a turbulent flow state in the transmission pipeline.

[0081] Furthermore, based on the pipeline structure parameters and pipeline medium state parameters, energy loss is calculated during the transport of the target drainage medium in the transmission pipeline, yielding pipeline energy loss data. It can be understood that the pipeline energy loss data represents the energy loss incurred by the target drainage medium in the transmission pipeline.

[0082] Similarly, based on different compartment structural parameters, the target drainage medium may exhibit different flow states when flowing within the drainage tank. Therefore, it is necessary to calculate the energy loss during the drainage process of the target drainage medium in the drainage tank based on the compartment medium state parameters of the target drainage medium. The compartment medium state parameters of the target drainage medium can be expressed by the Reynolds number, and their form is as follows:

[0083]

[0084] Where Re2 is the compartment medium state parameter; L c v1 is the characteristic length of the drainage chamber; v2 is the flow velocity of the target drainage medium in the drainage chamber. The selection of the characteristic length is related to the flow direction of the target drainage medium. For example, when the drainage chamber is cylindrical and the target drainage medium flows along the axial direction of the drainage chamber, the characteristic length can be the equivalent diameter of the drainage chamber. The flow velocity of the target drainage medium in the drainage chamber is as follows:

[0085]

[0086] Among them, A c Let be the cross-sectional area of ​​the drainage compartment, which takes the following form:

[0087]

[0088] Based on the numerical range of the medium state parameters in the chamber, the flow state of the target drainage medium in the drainage chamber can be determined: if Re2 < 2000, it indicates that the target drainage medium is in a laminar flow state in the drainage chamber; if 2000 ≤ Re2 ≤ 4000, it indicates that the target drainage medium is in a transitional flow state in the drainage chamber; if Re2 > 4000, it indicates that the target drainage medium is in a turbulent flow state in the drainage chamber.

[0089] Furthermore, based on the compartment structural parameters and compartment medium state parameters, energy loss calculations are performed on the drainage process of the target drainage medium in the drainage tank, yielding compartment energy loss data. It can be understood that the compartment energy loss data represents the energy loss generated by the target drainage medium in the drainage tank.

[0090] Furthermore, by summing the pipeline energy loss data and the compartment energy loss data, the predicted phase change energy loss can be obtained. This loss represents all the energy loss of the target drainage medium during the corresponding drainage process and is used to correct the theoretical drainage capacity of the underwater vehicle. This fully considers the influence of the underwater vehicle's structural design on the phase change of the target drainage medium and improves the accuracy of the obtained drainage capacity.

[0091] Reference Figure 4 As shown in one embodiment of this application, the pipeline structure parameters include friction-line structure parameters and local structure parameters; based on the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium, the energy loss during the transport process of the target drainage medium in the transmission pipeline is calculated to obtain pipeline energy loss data, including:

[0092] S212. Analyze the flow friction characteristics of the target drainage medium based on the structural parameters along the pipeline and the medium state parameters to obtain the friction coefficient of the target drainage medium.

[0093] S214. Calculate the friction along the target drainage medium using the friction coefficient and the frictional parameters along the flow path to obtain the frictional energy loss data of the target drainage medium.

[0094] S216. Calculate the local resistance of the target drainage medium based on the local structural parameters and pipeline medium state parameters to obtain the local energy loss data of the target drainage medium.

[0095] S218. Based on the friction loss data and local energy loss data, obtain the pipeline energy loss data.

[0096] Among them, the friction path structural parameters can be the geometric dimensions or material surface properties of the transmission pipeline, including but not limited to the length, inner diameter, roughness, and inclination angle of the transmission pipeline, used to determine the impact of the transmission pipeline on the flow of the target drainage medium. Local structural parameters can be the geometric dimensions or material surface properties of local structures installed in the transmission pipeline, such as bends or valves in the transmission pipeline, used to determine the impact of irregular structures in the transmission pipeline on the flow of the target drainage medium.

[0097] Specifically, when the target drainage medium is in a laminar flow state in the transmission pipeline, the friction coefficient of the target drainage medium is as follows:

[0098]

[0099] Where f is the friction coefficient of the target drainage medium. Since the transitional flow state may locally develop into turbulence, calculating the transitional flow state as a turbulent state provides a safety margin for underwater vehicles. Therefore, when the target drainage medium is in a turbulent or transitional flow state in the transmission pipeline, the friction coefficient of the target drainage medium takes the following form:

[0100]

[0101] Where ε is the absolute roughness of the transmission pipeline.

[0102] Furthermore, the energy loss data along the path of the target drainage medium is presented in the following form:

[0103]

[0104] Wherein, ΔP s Data on energy loss along the path; L p This represents the length of the transmission pipeline. It is understandable that friction loss data represents the energy loss caused by friction as the target drainage medium flows along the transmission pipeline.

[0105] Furthermore, the local energy loss data of the target drainage medium is presented in the following form:

[0106]

[0107] Wherein, ΔP l This represents local energy loss data; K is the local resistance coefficient, which can be determined based on the type of local structure in the transmission pipeline.

[0108] Furthermore, the pipeline energy loss data is presented in the following format:

[0109]

[0110] Where ΔE1 represents pipeline energy loss data; n represents the total number of local structures in the transmission pipeline.

[0111] Reference Figure 5 As shown, in one embodiment of this application, based on the compartment structural parameters and the compartment medium state parameters of the target drainage medium, the energy loss during the drainage process of the target drainage medium in the drainage tank is calculated to obtain compartment energy loss data, including:

[0112] S222. Based on the structural parameters of the compartment and the state parameters of the target drainage medium, the convective heat transfer characteristics of the target drainage medium are analyzed to obtain the convective heat transfer coefficient of the target drainage medium.

[0113] S224. Calculate the heat exchange of the target drainage medium using the convective heat transfer coefficient and the structural parameters of the compartment to obtain the energy loss data of the target drainage medium from the compartment wall.

[0114] Specifically, the convective heat transfer coefficient of the target drainage medium is as follows:

[0115]

[0116] Where h is the convective heat transfer coefficient; Nu is the Nusselt number; and k is the thermal conductivity of the target drainage medium. The Nusselt number can be expressed using the Dittus-Boelter equation, as follows:

[0117] Nu = 0.023Re2 0.8 Pr 0.3

[0118] Where Pr is Planck's coefficient, which has the following form:

[0119]

[0120] Among them, C p The specific heat capacity of the target drainage medium.

[0121] In some embodiments, the temperature difference between the target drainage medium and the drainage tank wall can also be obtained. When the temperature difference between the two is greater than a preset temperature difference threshold, the convective heat transfer coefficient of the target drainage medium is corrected using a heat transfer correction parameter. The heat transfer correction parameter is in the following form:

[0122]

[0123] Among them, C t For heat transfer correction parameters; μ f μ is the fluid dynamic viscosity calculated based on the temperature of the target drainage medium. w This is the fluid dynamic viscosity calculated based on the temperature of the drainage tank wall.

[0124] Furthermore, the bulkhead energy loss data for the target drainage medium is presented in the following format:

[0125] ΔE2=h·S c ·ΔT·Δt

[0126] Where ΔE2 represents bulkhead energy loss data; S c ΔT represents the surface area of ​​the drainage tank in contact with the target drainage medium; ΔT represents the temperature difference between the target drainage medium and the tank wall; Δt represents the time during which the target drainage medium controls the drainage tank's drainage. Taking a cylindrical drainage tank as an example, the surface area of ​​the drainage tank in contact with the target drainage medium takes the following form:

[0127]

[0128] Wherein, H represents the height of the drainage section controlled by the target drainage medium in the drainage chamber, and its form is as follows:

[0129] H = v2Δt.

[0130] Reference Figure 6 As shown, in one embodiment of this application, the theoretical displacement capacity is corrected for energy loss using predicted phase change energy loss to obtain the actual displacement capacity of the underwater vehicle, including:

[0131] S310. The energy loss ratio is obtained by proportionally calculating the predicted phase change energy loss and the phase change energy provided by the underwater vehicle to the target drainage medium.

[0132] S320. The theoretical drainage capacity is corrected by comparing the energy loss to obtain the actual drainage capacity.

[0133] Specifically, the energy loss ratio takes the following form:

[0134]

[0135] Where Q is the total energy supplied to the drainage regulating unit for the target drainage medium to undergo phase change.

[0136] Furthermore, the actual drainage capacity takes the following form:

[0137] V a =(1-α)V t

[0138] Among them, V a V represents the actual drainage capacity. t This represents the theoretical drainage capacity.

[0139] Understandably, this application considers the impact of the underwater vehicle's structural design on the target drainage medium after phase change, and calculates the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process, in order to determine the actual extent to which the target drainage medium can be used for the volume change caused by phase change, thereby effectively improving the accuracy of the obtained drainage capacity and enhancing the reliability of the underwater vehicle design process.

[0140] Reference Figure 7 As shown, in one embodiment of this application, the design operating parameters include the underwater vehicle's operating pressure data, operating temperature data, drainage medium density, and drainage medium load; based on the underwater vehicle's design operating parameters, phase change drainage calculations are performed on the target drainage medium to obtain the underwater vehicle's theoretical drainage capacity, including:

[0141] S110. Analyze the medium state of the target drainage medium based on the working pressure and working temperature data to determine the current medium state of the target drainage medium.

[0142] S120. Under the condition that the current medium condition meets the drainage working conditions, determine the phase change density of the target drainage medium based on the working pressure data and working temperature data, and perform volume conversion based on the phase change density and drainage medium load to obtain the theoretical drainage capacity; wherein, the drainage working conditions indicate that the target drainage medium is in a state that can be used for phase change drainage.

[0143] The operating pressure data can be the water pressure experienced by the underwater vehicle during underwater navigation, which is determined based on the designed navigation depth of the underwater vehicle. The operating temperature data can be the phase transition temperature of the target drainage medium after phase change, which is determined based on the pre-designed normal temperature range of the underwater vehicle.

[0144] Specifically, the density of the drainage medium can be obtained based on the drainage medium load of the underwater vehicle and the volume of the drainage regulating unit used to store the target drainage medium, as follows:

[0145]

[0146] Where ρ1 is the density of the drainage medium; m is the drainage medium capacity; V s This refers to the volume in the drainage regulating unit used to store the target drainage medium. Based on the drainage medium's density, operating pressure, and operating temperature data, a medium state analysis is performed on the target drainage medium to determine its current state. This determination can be done by querying a database; for example, the database could be the NIST REFPR OP database. If the target drainage medium is in a state suitable for phase change drainage, then the current medium state meets the drainage operating conditions; if the target drainage medium is in another state and cannot be directly used for drainage, then the current medium state does not meet the drainage operating conditions.

[0147] Furthermore, assuming the current medium condition meets the drainage operating conditions, the phase transition density of the target drainage medium after phase change is determined based on the operating pressure and operating temperature data. The phase transition density can be obtained by querying a database; for example, the database could be the NIST REFPR OP database.

[0148] Furthermore, the theoretical displacement capacity of the underwater vehicle is determined by converting the displacement medium capacity and the phase change density of the target displacement medium. The theoretical displacement capacity is expressed as follows:

[0149]

[0150] It is understandable that theoretical drainage capacity represents the theoretical drainage capacity that an underwater vehicle can possess, assuming the total amount of the target drainage medium is equal to the drainage medium load and the same phase change energy is provided to the drainage regulation unit.

[0151] As one embodiment of this application, the method further includes:

[0152] S130. If the current medium condition does not meet the drainage working conditions, increase the drainage medium load of the underwater vehicle and redetermine the current medium condition of the target drainage medium until the current medium condition meets the drainage working conditions.

[0153] Specifically, if the target drainage medium is in a state where it cannot be directly used for drainage, the state of the target drainage medium in the drainage regulating unit can be changed by increasing the drainage medium load. After each increase in the drainage medium load, the current state of the target drainage medium is redefined until the current medium state meets the drainage operating conditions. It can be understood that, with the increase in drainage medium load, the theoretical drainage capacity can also be expressed as:

[0154]

[0155] Where δm represents the increased drainage medium load.

[0156] It is understandable that the drainage regulating unit utilizes the significant volume change caused by the target drainage medium transitioning from a specific first phase state to a second phase state to control the drainage of the drainage tank. If the target drainage medium in the drainage regulating unit is not in the aforementioned specific first phase state, it will affect the drainage capacity of the target drainage medium. Therefore, before determining the drainage capacity of an underwater vehicle, it is necessary to ensure that the target drainage medium stored in the drainage regulating unit is in a state suitable for phase change drainage.

[0157] Accordingly, please refer to Figure 8 This application provides a device for determining the phase change drainage capacity of an underwater vehicle. The underwater vehicle's drainage tank is connected to a drainage adjustment unit. The drainage adjustment unit uses a target drainage medium and controls the drainage of the drainage tank by the volume change caused by the phase change of the target drainage medium. The device includes:

[0158] The theoretical drainage calculation module 810 is used to perform phase change drainage calculations on the target drainage medium based on the design operating parameters of the underwater vehicle, so as to obtain the theoretical drainage capacity of the underwater vehicle; wherein, the design operating parameters are used to describe the working environment of the underwater vehicle when it is navigating underwater.

[0159] The energy loss calculation module 820 is used to calculate the energy loss of the underwater vehicle during the drainage process based on the structural design parameters of the underwater vehicle, and to obtain the predicted phase change energy loss corresponding to the target drainage medium. The predicted phase change energy loss is used to describe the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process when the underwater vehicle is navigating underwater.

[0160] The energy loss correction module 830 is used to correct the theoretical displacement capacity by using the predicted phase change energy loss, so as to obtain the actual displacement capacity of the underwater vehicle.

[0161] In some optional embodiments, the drainage regulating unit and the drainage chamber are connected by a transmission pipeline, and the structural design parameters include the pipeline structure parameters of the transmission pipeline and the chamber structure parameters of the drainage chamber; the energy loss calculation module 820 includes: a pipeline energy loss calculation unit, used to calculate the energy loss of the target drainage medium in the transmission pipeline according to the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium, and obtain pipeline energy loss data.

[0162] The compartment energy loss calculation unit is used to calculate the energy loss of the target drainage medium in the drainage compartment based on the compartment structural parameters and the compartment medium state parameters of the target drainage medium, and obtain the compartment energy loss data.

[0163] The phase change energy loss prediction unit is used to predict the phase change energy loss based on pipeline energy loss data and compartment energy loss data.

[0164] In some optional implementations, the pipeline structural parameters include friction-line structural parameters and local structural parameters; the pipeline energy loss calculation unit includes:

[0165] The friction coefficient calculation subunit is used to analyze the flow friction characteristics of the target drainage medium based on the frictional parameters of the structure along the flow path and the medium state parameters, and to obtain the friction coefficient of the target drainage medium.

[0166] The friction calculation sub-unit is used to perform friction calculations on the target drainage medium using the friction coefficient and friction structure parameters to obtain the friction energy loss data of the target drainage medium.

[0167] The local resistance calculation subunit is used to calculate the local resistance of the target drainage medium based on local structural parameters and medium state parameters, and obtain the local energy loss data of the target drainage medium.

[0168] The pipeline energy loss calculation subunit is used to obtain pipeline energy loss data based on friction loss data and local energy loss data.

[0169] In some alternative implementations, the compartment energy loss calculation unit includes:

[0170] The heat transfer coefficient calculation subunit is used to analyze the convective heat transfer characteristics of the target drainage medium based on the compartment structural parameters and the compartment medium state parameters of the target drainage medium, and to obtain the convective heat transfer coefficient of the target drainage medium.

[0171] The bulkhead heat exchange calculation subunit is used to calculate the bulkhead heat exchange of the target drainage medium using the convective heat transfer coefficient and the compartment structural parameters, and to obtain the bulkhead energy loss data of the target drainage medium.

[0172] In some alternative implementations, the energy loss correction module 830 includes:

[0173] The loss ratio calculation unit is used to calculate the energy loss ratio based on the predicted phase change energy loss and the phase change energy provided by the underwater vehicle to the target drainage medium.

[0174] The energy loss correction unit is used to correct the theoretical drainage capacity by comparing the energy loss to obtain the actual drainage capacity.

[0175] In some optional implementations, the design operating parameters include the underwater vehicle's operating pressure data, operating temperature data, drainage medium density, and drainage medium load; the theoretical drainage calculation module 810 includes:

[0176] The medium state analysis unit is used to analyze the medium state of the target drainage medium based on the working pressure data and working temperature data, and to determine the current medium state of the target drainage medium.

[0177] The medium volume conversion unit is used to determine the phase change density of the target drainage medium based on the working pressure and working temperature data, and to perform volume conversion based on the phase change density and the drainage medium load to obtain the theoretical drainage capacity, provided that the current medium state meets the drainage working conditions. Here, the drainage working conditions indicate that the target drainage medium is in a state that can be used for phase change drainage.

[0178] In some optional implementations, the theoretical drainage calculation module 810 further includes:

[0179] The medium loading unit is used to increase the underwater vehicle's drainage medium loading capacity when the current medium condition does not meet the drainage working conditions, and to redetermine the current medium condition of the target drainage medium until the current medium condition meets the drainage working conditions.

[0180] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0181] In this embodiment, the device for determining the phase change drainage capacity of the underwater vehicle is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0182] Please see Figure 9 , Figure 9 This is a schematic diagram of a computer device according to an embodiment of this application. As shown in the figure, the computer device includes one or more processors 10, a memory 20, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components communicate with each other using different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some alternative embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 9 Take a processor 10 as an example.

[0183] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0184] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0185] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0186] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0187] The computer device also includes a communication interface 30 for communicating with other devices or communication networks.

[0188] This application also provides a computer-readable storage medium. The methods described in this application can be implemented in hardware or firmware, or implemented as recordable on a storage medium, or implemented as computer code downloaded over a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and subsequently stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the methods shown in the above embodiments are implemented.

[0189] This application provides a computer program product including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the method of any embodiment of this application.

[0190] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

[0191] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0192] For ease of description, the above devices are described separately by function as various units. Of course, in implementing this application, the functions of each unit can be implemented in one or more software and / or hardware.

[0193] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0194] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0195] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0196] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0197] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0198] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0199] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0200] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for determining the phase change displacement capacity of an underwater vehicle, characterized in that, The underwater vehicle's drainage tank is connected to a drainage regulating unit, which uses a target drainage medium. The drainage regulating unit controls the drainage of the drainage tank by controlling the volume change caused by the phase change of the target drainage medium. The method includes: Phase change drainage calculations are performed on the target drainage medium based on the design operating parameters of the underwater vehicle to obtain the theoretical drainage capacity of the underwater vehicle; wherein, the design operating parameters are used to describe the working environment of the underwater vehicle when it is navigating underwater; Based on the structural design parameters of the underwater vehicle, the energy loss of the medium during the drainage process of the underwater vehicle is calculated to obtain the predicted phase change energy loss corresponding to the target drainage medium; wherein, the predicted phase change energy loss is used to describe the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process when the underwater vehicle is navigating underwater. The theoretical displacement capacity is corrected by using the predicted phase change energy loss to obtain the actual displacement capacity of the underwater vehicle.

2. The method according to claim 1, characterized in that, The drainage regulating unit and the drainage chamber are connected by a transmission pipeline. The structural design parameters include the pipeline structure parameters and the chamber structure parameters of the drainage chamber. The calculation of medium energy loss during the drainage process of the underwater vehicle based on the structural design parameters of the underwater vehicle, to obtain the predicted phase change energy loss corresponding to the target drainage medium, includes: Based on the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium, the energy loss during the transportation process of the target drainage medium in the transmission pipeline is calculated to obtain pipeline energy loss data. Based on the chamber structure parameters and the chamber medium state parameters of the target drainage medium, the energy loss of the target drainage medium in the drainage chamber is calculated to obtain the chamber energy loss data. The predicted phase change energy loss is obtained based on the pipeline energy loss data and the cabin energy loss data.

3. The method according to claim 2, characterized in that, The pipeline structure parameters include friction parameters and local structure parameters; the step of calculating the energy loss of the target drainage medium during its transport process in the transmission pipeline based on the pipeline structure parameters and the pipeline medium state parameters of the target drainage medium to obtain pipeline energy loss data includes: analyzing the flow friction characteristics of the target drainage medium based on the friction parameters and the pipeline medium state parameters to obtain the friction coefficient of the target drainage medium; The friction coefficient and the frictional parameters along the target drainage medium are used to perform frictional calculations along the target drainage medium to obtain the frictional energy loss data of the target drainage medium. Based on the local structural parameters and the pipeline medium state parameters, the local resistance of the target drainage medium is calculated to obtain the local energy loss data of the target drainage medium. The pipeline energy loss data is obtained based on the energy loss data along the pipeline and the local energy loss data.

4. The method according to claim 2, characterized in that, The step involves calculating the energy loss of the target drainage medium during its drainage process in the drainage chamber based on the chamber structure parameters and the chamber medium state parameters of the target drainage medium, thereby obtaining chamber energy loss data, including: The convective heat transfer characteristics of the target drainage medium are analyzed based on the chamber structure parameters and the chamber medium state parameters of the target drainage medium to obtain the convective heat transfer coefficient of the target drainage medium. The heat exchange of the target drainage medium is calculated using the convective heat transfer coefficient and the compartment structural parameters to obtain the bulkhead energy loss data of the target drainage medium.

5. The method according to claim 1, characterized in that, The step of correcting the theoretical displacement capacity using the predicted phase transition energy loss to obtain the actual displacement capacity of the underwater vehicle includes: The energy loss ratio is obtained by proportionally calculating the predicted phase change energy loss and the phase change energy provided by the underwater vehicle to the target drainage medium. The actual drainage capacity is obtained by correcting the theoretical drainage capacity using the energy loss ratio.

6. The method according to any one of claims 1 to 5, characterized in that, The design operating parameters include the underwater vehicle's operating pressure data, operating temperature data, drainage medium density, and drainage medium capacity; the step of performing phase change drainage calculations on the target drainage medium based on the underwater vehicle's design operating parameters to obtain the underwater vehicle's theoretical drainage capacity includes: Based on the working pressure data and the working temperature data, the target drainage medium is analyzed to determine its current state. When the current medium condition meets the drainage working conditions, the phase change density of the target drainage medium is determined based on the working pressure data and the working temperature data, and the volume is converted based on the phase change density and the drainage medium load to obtain the theoretical drainage capacity; wherein, the drainage working conditions indicate that the target drainage medium is in a state that can be used for phase change drainage.

7. The method according to claim 6, characterized in that, The method further includes: If the current medium condition does not meet the drainage working conditions, the drainage medium load of the underwater vehicle is increased, and the current medium condition of the target drainage medium is re-determined until the current medium condition meets the drainage working conditions.

8. A device for determining the phase change displacement capacity of an underwater vehicle, characterized in that, The underwater vehicle's drainage tank is connected to a drainage regulating unit. The drainage regulating unit uses a target drainage medium and controls the drainage of the drainage tank by controlling the volume change caused by the phase change of the target drainage medium. The device includes: The theoretical drainage calculation module is used to perform phase change drainage calculations on the target drainage medium based on the design operating parameters of the underwater vehicle, so as to obtain the theoretical drainage capacity of the underwater vehicle; wherein, the design operating parameters are used to describe the working environment of the underwater vehicle when it is navigating underwater; The energy loss calculation module is used to calculate the energy loss of the underwater vehicle during the drainage process based on the structural design parameters of the underwater vehicle, and to obtain the predicted phase change energy loss corresponding to the target drainage medium; wherein, the predicted phase change energy loss is used to describe the energy loss of the target drainage medium due to friction or heat exchange during the corresponding drainage process when the underwater vehicle is navigating underwater. An energy loss correction module is used to correct the theoretical displacement capacity using the predicted phase change energy loss, so as to obtain the actual displacement capacity of the underwater vehicle.

9. A computer device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1 to 7.

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