Active working fluid injection liquid film into the high enthalpy boundary layer of gas-liquid phase change multi-domain coupling simulation method, equipment, medium and system

Abstract

The application discloses a kind of active working medium injects liquid film into high enthalpy boundary layer gas-liquid phase change multi-domain coupling simulation method, equipment, medium and system, belong to numerical calculation technical field, including steps: first, different control equation is used to solve high Mach number compressible outer flow and the flow field in porous structure, temperature field respectively, and in gas-solid interface, two-dimensional liquid film transport equation with liquid film thickness as state variable is used to obtain the physical parameters at liquid film gas-liquid interface;Finally, using the physical parameters, internal and external coupling simulation is carried out by parameter transmission.The simulation method of the application can accurately reveal the influence law of liquid film on boundary layer heat transfer characteristics, so as to facilitate accurate prediction of actual thermal protection performance.

Description

Technical Field

[0001] This invention relates to the field of numerical computation technology, and more specifically, to a multi-domain coupled simulation method, device, medium, and system for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high enthalpy boundary layer. Background Technology

[0002] High-speed aircraft face severe aerodynamic and thermal load threats to components such as the nose cone and wing leading edge under extreme high-speed flight environments, posing a significant challenge to the design of thermal protection systems. Phase change perspiration cooling technology achieves efficient thermal protection through coolant phase change heat absorption and ejection / displacement mechanisms, but its core difficulty lies in the complex coupling mechanism between gas-liquid two-phase flow within porous media, the dynamic behavior of the liquid film, and the high-enthalpy compressible external flow field. Existing methods, by neglecting the transport process of the liquid film at the boundary layer surface, struggle to accurately predict actual thermal protection performance. There is an urgent need to establish a gas-liquid-solid three-phase multi-domain coupled simulation method to reveal the influence of the liquid film on the boundary layer heat transfer characteristics, providing theoretical support for the design of thermal protection systems based on phase change perspiration cooling.

[0003] Existing technical solutions often employ step-by-step solutions for internal and external flow fields or simplify interface coupling, without modeling the spreading and evaporation processes of the liquid film at the gas-solid interface. This results in large deviations and uncertainties in boundary layer heat transfer predictions. Relying on static interpolation to transfer data fails to reflect the feedback of dynamic changes in the liquid film on the internal and external flow fields. Insufficient coupling between the two-phase flow within the porous medium and the non-equilibrium phase change of the external high-enthalpy flow field affects the assessment of cooling efficiency.

[0004] Therefore, for the heat and mass transport process of active sweating cooling system under high Mach number conditions, it is necessary to develop a high-speed chemical non-equilibrium outflow-porous medium inflow coupling numerical simulation scheme that considers the influence of liquid film transport at the gas-solid interface (i.e. gas-liquid-solid interface effect). Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-domain coupling simulation method, device, medium and system for actively ejecting liquid films into high enthalpy boundary layers, which can accurately reveal the influence of liquid films on the heat transfer characteristics of boundary layers, thereby facilitating accurate prediction of actual thermal protection performance.

[0006] The objective of this invention is achieved through the following solution: A multi-domain coupled simulation method for gas-liquid phase transition of an actively ejected liquid film into a high-enthalpy boundary layer includes the following steps: First, different governing equations are used to solve the flow field and temperature field of the high Mach number compressible external flow and the internal flow field of the porous structure, respectively. Then, a two-dimensional liquid film transport equation with liquid film thickness as the state variable is used at the gas-solid interface to obtain the physical parameters at the liquid film gas-liquid interface. Finally, the physical parameters are used to perform internal and external coupling simulation through parameter transfer.

[0007] Furthermore, the process first employs different governing equations to solve for the high Mach number compressible external flow and the internal flow and temperature fields of the porous structure, and then uses a two-dimensional liquid film transport equation with liquid film thickness as the state variable to obtain the physical parameters at the liquid film gas-liquid interface. Finally, using these physical parameters, an internal and external coupling simulation is performed through parameter transfer, specifically including the following sub-steps: Step a: Determine the initial state of the gas-liquid-solid three-phase multi-domain coupling interface and obtain the physical parameters at the gas-liquid and liquid-solid interfaces. Step b: Use the current liquid film surface temperature and the liquid film surface evaporation mass flow rate as the gas-liquid interface conditions for solving the external flow field; Step c: Solve the chemical nonequilibrium external flow field to obtain the physical parameters at the gas-liquid interface; Step d: Update the source terms of the liquid film control equation based on the current gas-liquid interface heat flux, interfacial pressure, and shear force. Step e: Solve the liquid film governing equations to obtain the physical parameters at the liquid-solid interface; Step f: Determine the outer boundary conditions of the micro-percolation flow field and temperature field inside the porous structure; Step g: Solve the control equations for the micro-permeation flow field and temperature field inside the porous structure to obtain the physical parameters at the liquid-solid interface; Step h: Based on the current liquid-solid interface temperature and interfacial mass flow rate, update the energy term of the liquid film control equation; Step i: Solve the liquid film transport equation to obtain the physical parameters at the liquid-gas-liquid interface at the next moment; Step j, iterate through steps b to h until the coupling simulation termination time requirement is met, and the calculation ends.

[0008] Furthermore, in step g, solving the governing equations for the micro-percolation flow field and temperature field inside the porous structure specifically includes the following sub-steps: The enthalpy method based on a two-phase mixing model and a porous medium thermal nonequilibrium model is used to solve the problem. The governing equations are:

[0009] in, Porosity For fluid density, t For time, for i Spatial coordinates in direction for j Spatial coordinates in direction for i velocity in direction, for j velocity in direction, For pressure, The dynamic viscosity of the gas-liquid mixture. For penetration rate, Enthalpy of mixture For convection coefficient, The effective thermal conductivity of the fluid, For fluid temperature, The capillary diffusion coefficient is... Latent heat, For saturation, For fluid-solid heat transfer source items, Components s solid density, Specific heat of solids For solid temperature, It represents the effective thermal conductivity of the solid.

[0010] Further, in step i, solving the liquid film transport equation specifically includes the following sub-steps: The two-dimensional liquid film transport equations, with liquid film thickness as the state variable, are used for solution. The governing equations are as follows:

[0011] in, t For time, for i velocity in direction, for j velocity in direction, for i Spatial coordinates in direction for j Spatial coordinates in direction This refers to the gas-liquid interface pressure. Shear force, For liquid film thickness, For the ejector mass flow rate, The mass flow rate of liquid-gas evaporation at the liquid film surface. For liquid film density, The dynamic viscosity of the liquid film. For liquid film temperature, The specific heat capacity of the liquid film. For heat flow at the gas-liquid interface, For liquid-solid interface heat flow, The mass flow rate of liquid-gas evaporation at the liquid film surface. This is the latent heat of vaporization of the liquid film working fluid.

[0012] A multi-domain coupled simulation device for gas-liquid phase change of an active working fluid ejecting a liquid film into a high enthalpy boundary layer includes a processor and a memory, wherein the memory stores a computer program that, when loaded by the processor, executes the method described in any of the preceding descriptions.

[0013] A computer-readable storage medium storing a computer program that, when loaded by a processor, executes the method described in any of the preceding claims.

[0014] A multi-domain coupled simulation system for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high enthalpy boundary layer includes the multi-domain coupled simulation device for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high enthalpy boundary layer as described above.

[0015] The beneficial effects of this invention include: The method of this invention considers the influence of liquid film transport at the gas-solid interface. It uses different governing equations to solve the flow field and temperature field of high Mach number compressible outflow and porous structure internal flow field respectively. It proposes a two-dimensional liquid film transport equation with liquid film thickness as the state variable at the gas-solid interface. Furthermore, it achieves internal and external coupling through parameter transfer, thereby revealing the influence of liquid film on boundary layer heat transfer characteristics. Based on the simulation method of this invention, the actual thermal protection performance can be accurately predicted. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the gas-liquid-solid three-phase multi-domain coupling problem for actively ejecting a liquid film into a high-enthalpy boundary layer; Figure 2 Flowchart of the solution process for the gas-liquid-solid three-phase multi-domain coupled simulation method for actively ejecting the liquid film into the high-enthalpy boundary layer; Figure 3 A schematic diagram of the parameter transfer scheme for a gas-liquid-solid three-phase multi-domain coupling simulation of an active working fluid ejecting a liquid film into a high-enthalpy boundary layer. Detailed Implementation

[0018] All features disclosed in all embodiments of this specification, or steps in all methods or processes implied in the disclosure, may be combined and / or extended or replaced in any way, except for mutually exclusive features and / or steps.

[0019] Opinions on the multi-domain coupling problem of gas-liquid-solid three phases Figure 1As shown, this involves porous media, liquid films, and gas flow. In a preferred embodiment, the present invention specifically provides a multi-domain coupled simulation method for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high-enthalpy boundary layer, comprising the following steps: firstly, different governing equations are used to solve the flow field and temperature field inside the high Mach number compressible outflow and the porous structure, respectively; and a two-dimensional liquid film transport equation with liquid film thickness as the state variable is proposed at the gas-solid interface; further, internal and external coupling is achieved through parameter transfer.

[0020] Based on the above embodiments, in a more specific embodiment, a multi-domain coupled simulation method for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high-enthalpy boundary layer is provided, and the specific implementation steps are as follows: Step a. Determine the initial state of the gas-liquid-solid three-phase multi-domain coupling interface and obtain the physical parameters at the gas-liquid and liquid-solid interfaces; Step b. Use the current liquid film surface temperature and the liquid film surface evaporation mass flow rate as the gas-liquid interface conditions for solving the external flow field; Step c. Solve for the nonequilibrium chemical flow field to obtain the physical parameters at the gas-liquid interface; Step d. Update the source terms of the liquid film governing equations based on the current gas-liquid interface heat flux, interfacial pressure, and shear force; Step e. Solve the governing equations of the liquid film to obtain the physical parameters at the liquid-solid interface; Step f. Determine the external boundary conditions of the micro-percolation flow field and temperature field inside the porous structure; Step g. Solve the governing equations for the micro-permeation flow field and temperature field inside the porous structure to obtain the physical parameters at the liquid-solid interface; Step h. Update the energy term of the liquid film control equation based on the current liquid-solid interface temperature and interfacial mass flow rate; Step i. Solve the liquid film transport equation to obtain the physical parameters at the liquid-gas-liquid interface at the next moment.

[0021] Step j. Iterate through steps b to h until the coupling simulation termination time requirement is met, at which point the calculation ends.

[0022] Based on the above embodiments, in other more specific embodiments, a multi-domain coupled simulation method for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high-enthalpy boundary layer is provided, the overall steps of which are as follows: Figure 2 As shown, the interface coupling parameter passing scheme is as follows: Figure 3 As shown, the specific steps include: a. Determine the initial time (coupling step) The gas-liquid-solid three-phase multi-domain coupled interface state was obtained, and the physical parameters at the gas-liquid and liquid-solid interfaces were obtained: liquid-gas surface temperature. Initial cold wall temperature Zero ejection (ejector mass flow rate) External flow field under certain conditions; initial temperature of a spatially uniform porous seepage field. Initial ejection mass Liquid film thickness .

[0023] b. The current time (coupling step) Liquid-gas surface temperature of the liquid film Mass flow rate of liquid-gas evaporation on liquid film surface As a gas-liquid interface condition for solving the external flow field.

[0024] c. Solve for the non-equilibrium external flow field to obtain the physical parameters at the gas-liquid interface: gas-liquid interface heat flux. Gas-liquid interface pressure and gas-liquid shear force .

[0025] Among them, the high Mach number compressible outflow is solved using the three-dimensional Navier-Stokes (NS) equations under the assumption of multi-component chemical nonequilibrium, and its governing equations are:

[0026] in, t For time, Components s density, for i Spatial coordinates in direction for j Spatial coordinates in direction for i velocity in direction, for j velocity in direction, For mass diffusion flux, The mass source term is caused by the chemical reaction in the flow field. For fluid density, For pressure, Shear force, For total energy, This is an energy source term.

[0027] d. Based on the current gas-liquid interface heat flow Interface pressure and shear force Update the right-hand source terms of the momentum and energy equations in the liquid film governing equations.

[0028] e. Solve the governing equations of the liquid film to obtain the physical parameters at the liquid-solid interface: interfacial heat flow. Based on the fundamental assumptions of the liquid film control equation, the gas-liquid interface pressure is... Converted into solid-liquid interface pressure .

[0029] f. Transferring heat flow at the liquid-solid interface and interface pressure As the outer boundary condition for the micro-percolation flow field and temperature field inside the porous structure.

[0030] g. Solve the governing equations for the micro-flow and temperature fields inside the porous structure to obtain the physical parameters at the liquid-solid interface: interface solid temperature. Fluid temperature and mass flow rate; It should be noted that the micro-percolation flow field and temperature field inside the porous structure were solved using the enthalpy method based on the Two-Phase Mixture Model (TPMM) and the Local Thermal Non-Equilibrium (LTNE) model. The governing equations are as follows: ; in, Porosity The dynamic viscosity of the gas-liquid mixture. For penetration rate, Enthalpy of mixture For convection coefficient, The effective thermal conductivity of the fluid, For fluid temperature, The capillary diffusion coefficient is... Latent heat, For saturation, For fluid-solid heat transfer source items, For solid density, Specific heat of solids For solid temperature, It represents the effective thermal conductivity of the solid.

[0031] interface solid temperature Fluid temperature According to the following correlation, the porosity of the porous structure is... The equivalent temperature of the liquid-solid interface is obtained by weighting the parameters. .

[0032] ; h. Based on the current solid-liquid interface temperature Interface quality flow rate Update the energy term of the liquid film governing equation.

[0033] i. Solve the liquid film transport equation to obtain the next time step (coupling step). +1) Physical parameters at the liquid-gas interface: surface temperature Mass flow rate of liquid film surface evaporation .

[0034] Considering that the thickness of the three-dimensional liquid film at the gas-solid interface is much smaller than the liquid film flow or spanwise scale, the three-dimensional liquid film is treated as two-dimensional. The gas-solid interface is solved using a two-dimensional liquid film transport equation with the liquid film thickness as the state variable. The governing equation is:

[0035] in, For liquid film density, The dynamic viscosity of the liquid film. For liquid film temperature, For liquid film thickness, The specific heat capacity of the liquid film. This is the latent heat of vaporization of the liquid film working fluid.

[0036] j. Iterate through steps b to h until the coupling simulation termination time requirement is met, at which point the calculation ends.

[0037] Figure 1 middle, This represents the shear stress exerted by the gas on the liquid film. This represents the viscous resistance of the solid wall to the liquid film.

[0038] Figure 3 In the middle, b (i) ~j (i) The steps under the i-th coupling step j ( j = b~i).

[0039] It should be noted that, within the scope of protection defined in the claims of this invention, the following embodiments can be combined and / or extended or replaced in any logical manner from the above specific embodiments, such as the disclosed technical principles, disclosed technical features or implicitly disclosed technical features.

[0040] Example 1 A multi-domain coupled simulation method for gas-liquid phase transition of an actively ejected liquid film into a high-enthalpy boundary layer includes the following steps: First, different governing equations are used to solve the flow field and temperature field of the high Mach number compressible external flow and the internal flow field of the porous structure, respectively. Then, a two-dimensional liquid film transport equation with liquid film thickness as the state variable is used at the gas-solid interface to obtain the physical parameters at the liquid film gas-liquid interface. Finally, the physical parameters are used to perform internal and external coupling simulation through parameter transfer.

[0041] Example 2 Based on Example 1, the flow field and temperature field of the high Mach number compressible external flow and the internal flow field of the porous structure are first solved using different governing equations. Then, at the gas-solid interface, a two-dimensional liquid film transport equation with liquid film thickness as the state variable is used to obtain the physical parameters at the liquid film gas-liquid interface. Finally, using these physical parameters, an internal and external coupling simulation is performed through parameter transfer, specifically including the following sub-steps: Step a: Determine the initial state of the gas-liquid-solid three-phase multi-domain coupling interface and obtain the physical parameters at the gas-liquid and liquid-solid interfaces. Step b: Use the current liquid film surface temperature and the liquid film surface evaporation mass flow rate as the gas-liquid interface conditions for solving the external flow field; Step c: Solve the chemical nonequilibrium external flow field to obtain the physical parameters at the gas-liquid interface; Step d: Update the source terms of the liquid film control equation based on the current gas-liquid interface heat flux, interfacial pressure, and shear force. Step e: Solve the liquid film governing equations to obtain the physical parameters at the liquid-solid interface; Step f: Determine the outer boundary conditions of the micro-percolation flow field and temperature field inside the porous structure; Step g: Solve the control equations for the micro-permeation flow field and temperature field inside the porous structure to obtain the physical parameters at the liquid-solid interface; Step h: Based on the current liquid-solid interface temperature and interfacial mass flow rate, update the energy term of the liquid film control equation; Step i: Solve the liquid film transport equation to obtain the physical parameters at the liquid-gas-liquid interface at the next moment; Step j, iterate through steps b to h until the coupling simulation termination time requirement is met, and the calculation ends.

[0042] Example 3 Based on Example 2, step g, which involves solving the governing equations for the micro-permeation flow field and temperature field inside the porous structure, specifically includes the following sub-steps: The enthalpy method based on a two-phase mixing model and a porous medium thermal nonequilibrium model is used to solve the problem. The governing equations are:

[0043] in, Porosity For fluid density, t For time, for i Spatial coordinates in direction for j Spatial coordinates in direction for i velocity in direction, for j velocity in direction, For pressure, The dynamic viscosity of the gas-liquid mixture. For penetration rate, Enthalpy of mixture For convection coefficient, The effective thermal conductivity of the fluid, For fluid temperature, The capillary diffusion coefficient is... Latent heat, For saturation, For fluid-solid heat transfer source items, Components s solid density, Specific heat of solids For solid temperature, It represents the effective thermal conductivity of the solid.

[0044] Example 4 Based on Example 2, step i, which involves solving the liquid film transport equation, specifically includes the following sub-steps: The two-dimensional liquid film transport equations, with liquid film thickness as the state variable, are used for solution. The governing equations are as follows:

[0045] in, t For time, for i Spatial coordinates in direction for j Spatial coordinates in direction for i velocity in direction, for j velocity in direction, This refers to the gas-liquid interface pressure. Shear force, For liquid film thickness, For the ejector mass flow rate, The mass flow rate of liquid-gas evaporation at the liquid film surface. For liquid film density, The dynamic viscosity of the liquid film. For liquid film temperature, The specific heat capacity of the liquid film. For heat flow at the gas-liquid interface, For liquid-solid interface heat flow, The mass flow rate of liquid-gas evaporation at the liquid film surface. This is the latent heat of vaporization of the liquid film working fluid.

[0046] Example 5 A multi-domain coupling simulation device for gas-liquid phase change of an active working fluid ejecting a liquid film into a high enthalpy boundary layer includes a processor and a memory. The memory stores a computer program, which, when loaded by the processor, executes the method described in any one of Examples 1 to 4.

[0047] Example 6 A computer-readable storage medium storing a computer program, the computer program being loaded by a processor and executed as described in any one of Embodiments 1 to 4.

[0048] Example 7 A multi-domain coupled simulation system for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high enthalpy boundary layer includes the multi-domain coupled simulation device for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high enthalpy boundary layer described in Example 5.

[0049] The units described in the embodiments of the present invention can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0050] According to one aspect of the present invention, a computer program product or computer program is provided, the computer program product or computer program 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 methods provided in the various optional implementations described above.

[0051] In another aspect, embodiments of the present invention also provide a computer-readable medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the methods described in the above embodiments.

Claims

1. A multi-domain coupled simulation method for gas-liquid phase transition of an actively ejected liquid film into a high-enthalpy boundary layer, characterized in that, Including the following steps: First, different governing equations are used to solve the flow field and temperature field of the high Mach number compressible external flow and the internal flow field of the porous structure, respectively. Then, a two-dimensional liquid film transport equation with liquid film thickness as the state variable is used at the gas-solid interface to obtain the physical parameters at the liquid film gas-liquid interface. Finally, using these physical parameters, an internal and external coupled simulation is performed through parameter transfer. The specific steps include: Step a: Determine the initial state of the gas-liquid-solid three-phase multi-domain coupled interface and obtain the physical parameters at the gas-liquid and liquid-solid interfaces: liquid-gas surface temperature. Initial cold wall temperature Ejector mass flow rate Initial ejection mass and liquid film thickness ; Step b, set the current liquid-gas surface temperature of the liquid film. Mass flow rate of liquid film surface evaporation As a gas-liquid interface condition for solving the external flow field; Step c, solve for the non-equilibrium external flow field to obtain the physical parameters at the gas-liquid interface: gas-liquid interface heat flow. Gas-liquid interface pressure and gas-liquid shear force ; Step d, based on the current gas-liquid interface heat flow Interface pressure and shear force Update the source terms of the liquid film control equation; Step e: Solve the governing equations of the liquid film to obtain the physical parameters at the liquid-solid interface: interfacial heat flow. Based on the fundamental assumptions of the liquid film control equation, the gas-liquid interface pressure is... Converted into solid-liquid interface pressure ; Step f, transfer the heat flow at the liquid-solid interface and interface pressure As the outer boundary condition for the micro-permeation flow field and temperature field inside the porous structure; Step g: Solve the governing equations for the micro-percolation flow field and temperature field inside the porous structure to obtain the physical parameters at the liquid-solid interface: interface solid temperature. Fluid temperature and mass flow rate; Step h, based on the current liquid-solid interface temperature Interface quality flow rate Update the energy term of the liquid film control equation; Step i: Solve the liquid film transport equation to obtain the physical parameters at the liquid-gas-liquid interface at the next moment: surface temperature. and the mass flow rate of liquid film surface evaporation ; Step j, iterate through steps b to h until the coupling simulation termination time requirement is met, then the calculation ends; In step i, solving the liquid film transport equation specifically includes the following sub-steps: The two-dimensional liquid film transport equations, with liquid film thickness as the state variable, are used for solution. The governing equations are as follows: in, t For time, for i velocity in direction, for j velocity in direction, for i Spatial coordinates in direction for j Spatial coordinates in direction This refers to the gas-liquid interface pressure. Shear force, For liquid film thickness, For the ejector mass flow rate, The mass flow rate of liquid-gas evaporation at the liquid film surface. For liquid film density, The dynamic viscosity of the liquid film. For liquid film temperature, The specific heat capacity of the liquid film. For heat flow at the gas-liquid interface, For liquid-solid interface heat flow, The mass flow rate of liquid-gas evaporation at the liquid film surface. This is the latent heat of vaporization of the liquid film working fluid.

2. The multi-domain coupled simulation method for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high-enthalpy boundary layer according to claim 1, characterized in that, In step g, solving the governing equations for the micro-percolation flow field and temperature field inside the porous structure specifically includes the following sub-steps: The enthalpy method based on a two-phase mixing model and a porous medium thermal nonequilibrium model is used to solve the problem. The governing equations are: in, Porosity For fluid density, t For time, for i Spatial coordinates in direction for j Spatial coordinates in direction for i velocity in direction, for j velocity in direction, For pressure, The dynamic viscosity of the gas-liquid mixture. For penetration rate, Enthalpy of mixture For convection coefficient, The effective thermal conductivity of the fluid, For fluid temperature, The capillary diffusion coefficient is... Latent heat, For saturation, For fluid-solid heat transfer source items, Components s solid density, Specific heat of solids For solid temperature, It represents the effective thermal conductivity of the solid.

3. A multi-domain coupled simulation device for actively ejecting a liquid film into a high-enthalpy boundary layer of gas-liquid phase change, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program that, when loaded by the processor, executes the method as described in any one of claims 1 to 2.

4. A computer-readable storage medium, characterized in that, A computer program is stored in a readable storage medium, the computer program being loaded by a processor and executing the method as described in any one of claims 1 to 2.

5. A multi-domain coupled simulation system for gas-liquid phase transition of an active working fluid ejecting a liquid film into a high-enthalpy boundary layer, characterized in that, The device includes the gas-liquid phase transition multi-domain coupling simulation device for actively ejecting liquid films into high-enthalpy boundary layers, as described in claim 3.

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