CN113051687A - Method and device for processing flow field of check valve - Google Patents
Method and device for processing flow field of check valve Download PDFInfo
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Abstract
The invention discloses a method and a device for processing a check valve flow field. Wherein, the method comprises the following steps: acquiring a flow passage grid diagram of the check valve; adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the flow passage grid diagram to obtain a flow field simulation result of the check valve; and generating a flow field velocity cloud chart of the check valve based on the flow field simulation result. The invention solves the technical problem of inaccurate analysis result due to dynamic change of boundary conditions in flow field analysis.
Description
Technical Field
The invention relates to the technical field of flow field analysis, in particular to a method and a device for processing a check valve flow field.
Background
In the prior art, when FLUENT software is adopted to analyze the flow field of the check valve, the FLUENT software cannot be directly set or controlled due to the fact that boundary conditions in flow field analysis are changed dynamically, and therefore the analysis result is very easy to be inaccurate.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method and a device for processing a check valve flow field, which at least solve the technical problem that an analysis result is inaccurate due to dynamic change of boundary conditions in flow field analysis.
According to an aspect of an embodiment of the present invention, there is provided a method for processing a flow field of a check valve, including: acquiring a flow passage grid diagram of the check valve; adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the runner grid diagram to obtain a flow field simulation result of the check valve; and generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
Optionally, before obtaining the flow path grid diagram of the check valve, the method further includes: establishing a two-dimensional flow channel model of the check valve; and carrying out gridding treatment on the two-dimensional flow channel model of the check valve to generate the flow channel grid diagram of the check valve.
Optionally, after generating the flow path grid diagram of the check valve, the method further includes: setting boundary conditions of a flow passage grid diagram of the check valve, wherein the boundary conditions of the flow passage grid diagram of the check valve include at least one of: setting inlet and outlet air pressures for the check valve, setting spring rate and equivalent mass for the check valve.
Optionally, adjusting the inlet air pressure of the check valve comprises: acquiring the flow time of inlet air of the check valve; adjusting an inlet air pressure of the check valve to a first air pressure when the flow time is less than or equal to a predetermined time; adjusting an inlet air pressure of the check valve to a second air pressure when the flow time is greater than the predetermined time; wherein the first air pressure is greater than the second air pressure.
Optionally, controlling the movement of the valve body of the check valve comprises: controlling a valve body of the check valve to maintain a current position in a case where a spring of the check valve is at a top dead center; and in the case that the spring of the check valve is not at the top dead center, controlling the valve body of the check valve to continue moving.
Optionally, before controlling the valve body of the check valve to move, the method further comprises: judging whether a spring of the check valve moves to a top dead center or not; when the displacement of the spring of the check valve is larger than or equal to the total stroke and the resultant external force of the valve body of the check valve is larger than or equal to zero, the valve body of the check valve is positioned at the top dead center; wherein, the resultant external force is the difference between the fluid acting force and the elastic force of the spring.
Optionally, generating a flow field velocity cloud map of the check valve based on the flow field simulation result includes: determining the air flow velocity distribution of the check valve at different moments according to the flow field simulation result; and obtaining a flow field velocity cloud chart of the check valve according to the air flow velocity distribution of the check valve at different moments.
According to another aspect of the embodiments of the present invention, there is also provided a processing apparatus of a flow field of a check valve, including: the acquisition module is used for acquiring a flow passage grid diagram of the check valve; the adjusting control module is used for adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the runner grid diagram to obtain a flow field simulation result of the check valve; and the generating module is used for generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium, where the computer-readable storage medium includes a stored program, where when the program runs, the computer-readable storage medium is controlled to implement a processing method of a check valve flow field, where the processing method is described in any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes a processing method of the check valve flow field described in any one of the above.
In the embodiment of the invention, a flow passage grid diagram of the check valve is obtained; adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the flow passage grid diagram to obtain a flow field simulation result of the check valve; based on a flow field simulation result, a flow field velocity cloud chart of the check valve is generated, transient flow field simulation is carried out on the whole movement process of the check valve by adjusting the inlet air pressure of the check valve and controlling the movement of the valve body, the purpose of generating the flow field velocity cloud chart of the check valve is achieved, the technical effect of knowing the flow rule of fluid in the check valve movement engineering more accurately in detail is achieved, and the technical problem that the analysis result is inaccurate due to the fact that the boundary condition is dynamically changed in flow field analysis is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of processing a check valve flow field according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a two-dimensional flow path mesh model of a check valve according to an alternative embodiment of the invention;
FIG. 3 is a cloud plot of check valve velocities at 0.00136s, according to an alternative embodiment of the invention;
FIG. 4 is a 0.0092s check valve velocity cloud in accordance with an alternative embodiment of the present invention;
fig. 5 is a schematic view of a processing device of a check valve flow field according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided an embodiment of a method of processing a check valve flow field, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
Fig. 1 is a flowchart of a processing method of a check valve flow field according to an embodiment of the present invention, as shown in fig. 1, the processing method of the check valve flow field includes the steps of:
step S102, acquiring a flow passage grid diagram of the check valve;
step S104, adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the flow passage grid diagram to obtain a flow field simulation result of the check valve;
and step S106, generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
Through the steps, the flow field simulation of the whole movement process of the check valve is realized by adjusting the inlet air pressure of the check valve and controlling the movement of the valve body, so that the purpose of generating the flow field velocity cloud chart of the check valve is achieved, the technical effect of knowing the flow rule of the fluid in the check valve movement engineering in more detail and accurately is realized, and the technical problem of inaccurate analysis result caused by the fact that the boundary condition is dynamically changed in flow field analysis is solved.
Optionally, before obtaining the flow path grid diagram of the check valve, the method further includes: establishing a two-dimensional flow channel model of the check valve; and carrying out gridding treatment on the two-dimensional flow channel model of the check valve to generate a flow channel grid diagram of the check valve.
In an optional implementation manner, two-dimensional flow channel models corresponding to different types of check valves can be established according to the different types of check valves, in a specific implementation process, the two-dimensional flow channel of the check valve needs to be determined first, then the two-dimensional flow channel model of the check valve is established according to the two-dimensional flow channel of the check valve, and then the two-dimensional flow channel model of the check valve is subjected to gridding processing to obtain a flow channel grid diagram of the check valve. It should be noted that, during the gridding process, the grid division in the flow channel grid diagram of the check valve may be divided into the same or different grids according to different application requirements, for example, squares, rectangles, and the like. Generally, in the specific implementation, the grid shapes in the flow passage grid diagram of the check valve are consistent, so that the analysis and the processing of the flow passage grid diagram of the check valve can be accelerated, and the subsequent processing time of the flow passage grid diagram of the check valve can be saved. Through the implementation mode, the two-dimensional flow channel model of the check valve can be established, the model is divided in a gridding mode to obtain the flow channel grid diagram of the check valve, the calculation complexity can be effectively reduced by adopting the two-dimensional flow channel modeling, and the calculation time is saved.
Optionally, after generating the flow path grid diagram of the check valve, the method further includes: setting boundary conditions of a flow passage grid diagram of the check valve, wherein the boundary conditions of the flow passage grid diagram of the check valve include at least one of the following: inlet and outlet air pressures to set the check valves, spring rate and equivalent mass to set the check valves.
In an alternative embodiment, in order to make the two-dimensional flow channel model of the check valve closer to the actual working condition, after the flow channel grid map of the check valve is generated, a series of settings may be performed on the boundary conditions of the flow channel grid map of the check valve, for example, setting the inlet air pressure of the check valve, setting the outlet air pressure of the check valve, setting the spring rate of the check valve, and setting the equivalent mass of the check valve. It should be noted that, in the specific implementation process, the boundary conditions of the flow channel grid diagram for setting the check valve may be set, including but not limited to those described above, and other boundary conditions may also be set specifically according to the needs of the application scenario, which is not described herein again. Through the embodiment, the real working condition of the check valve in practical application can be more accurately simulated.
Optionally, adjusting the inlet air pressure of the check valve comprises: acquiring the flow time of inlet air of the check valve; adjusting an inlet air pressure of the check valve to a first air pressure when the flow time is less than or equal to a predetermined time; adjusting an inlet air pressure of the check valve to a second air pressure when the flow time is greater than the predetermined time; wherein the first air pressure is greater than the second air pressure.
In an optional implementation manner, in the process of controlling the inlet air pressure of the check valve, the flow time of the inlet air of the check valve needs to be acquired, and then whether the flow time reaches the predetermined time is judged, if the flow time is less than or equal to the predetermined time, the inlet air pressure of the check valve can be adjusted to the first air pressure; if the flow time is greater than the predetermined time, the inlet air pressure of the check valve is adjusted to a second air pressure. The predetermined time may be set as needed, and alternatively, the predetermined time may be 0.01 s. The first air pressure may be greater than the second air pressure, and alternatively, the first air pressure may be 2000Pa and the second air pressure may be 0 Pa. By means of the above-described embodiment, the inlet air pressure of the check valve can be controlled dynamically and more flexibly upon dynamic changes in the boundary conditions.
Optionally, controlling the valve body movement of the check valve comprises: controlling the valve body of the check valve to keep the current position under the condition that the spring of the check valve is positioned at the top dead center; in the case where the spring of the check valve is not at the top dead center, the valve body controlling the check valve continues to move.
In an alternative embodiment, during the movement of the valve body of the check valve, if the spring of the check valve is at the top dead center, the valve body of the check valve can be controlled to maintain the current position; if the spring of the check valve is not at the top dead center, the valve body of the check valve can be controlled to continue moving. Through the embodiment, the valve body of the check valve can be dynamically and flexibly controlled to move when the boundary condition is dynamically changed.
Optionally, before the valve body of the check valve is controlled to move, the method further comprises: judging whether a spring of the check valve moves to a top dead center or not; when the displacement of the spring of the check valve is more than or equal to the total stroke and the resultant external force of the valve body of the check valve is more than or equal to zero, the valve body of the check valve is positioned at the top dead center; wherein, the resultant external force is the difference between the fluid acting force and the elastic force of the spring.
In an optional implementation manner, before controlling the valve body of the check valve to move, it is further required to determine whether the spring of the check valve moves to the top dead center, and if the displacement of the spring of the check valve is greater than or equal to the total stroke and the resultant external force of the valve body of the check valve is greater than or equal to zero, the valve body of the check valve is at the top dead center; and if the displacement of the spring of the check valve is smaller than the total stroke and the resultant external force of the valve body of the check valve is smaller than zero, the valve body of the check valve is not positioned at the top dead center. Wherein, the resultant external force is the difference between the fluid acting force and the elastic force of the spring. Through the embodiment, whether the valve body of the check valve is positioned at the top dead center or not can be accurately judged according to the displacement of the spring of the check valve and the combined external force of the valve body of the check valve.
Optionally, generating a flow field velocity cloud map of the check valve based on the flow field simulation result, including: determining the air flow velocity distribution of the check valve at different moments according to the flow field simulation result; and obtaining a flow field velocity cloud chart of the check valve according to the air velocity distribution of the check valve at different moments.
In an alternative embodiment, according to the flow field simulation result, the air flow velocity distribution of the check valve at different times can be obtained, and then the flow field velocity cloud charts of the check valve at different times are generated correspondingly. Through the embodiment, the flow field motion rule can be rapidly and effectively known by utilizing the flow field speed cloud chart of the check valve, the later-stage design optimization is facilitated, and the product performance is improved.
An alternative embodiment of the invention is described in detail below.
Fig. 2 is a schematic diagram of a two-dimensional flow channel grid model of a check valve according to an alternative embodiment of the present invention, as shown in fig. 2, air flows in from an inlet, as air pressure increases, a back-off spring is mixed with internal air, as air pressure decreases, the check valve is automatically closed under the action of the spring to prevent air from entering an air flow channel, and in order to reduce calculation time, a flow field simulation is performed on a process of air rushing out the check valve by using the two-dimensional flow channel grid model. The flow field analysis method comprises the following specific steps:
1. two-dimensional model building and meshing
Modeling a two-dimensional flow passage of the check valve by using Gambit software, carrying out grid division, setting boundary conditions, adopting a structured grid, setting the air pressure to be 2000Pa within 0-0.01s, setting the pressure to be 0Pa from 0.01s to the next period, setting the outlet to be standard atmospheric pressure, setting the spring elastic coefficient of the check valve to be 500N/m and the equivalent mass to be 0.005kg, connecting a moving area and a static area of the valve body by using an interface, and because FLUENT can not simulate the movement of two completely coincident solids, the valve body at the initial position has a certain distance from the throat surface.
2. Check valve dynamic grid compilation
The check valve body is acted by the fluid and the spring force to move, and the Newton's second law is satisfied:
vt＝vt-Δt+(F/m)Δt
where F is the magnitude of the resultant force, m is the fluid mass, t0 represents the initial time, t is the instant time, vtIs the instantaneous velocity, vt-ΔtFor the initial speed, Δ t is a time variable.
The check valve actuation mesh is compiled using rigid MOTION macro DEFINE _ CG _ MOTION, the compiled file is as follows:
3. User-Defined Function (UDF) writing for pressure import
The gas pressure at the inlet is 2000Pa at 0-0.01s, 0.01s to 0Pa at the next cycle, the inlet pressure is accomplished by the DEFINE _ PROFILE macro, and the specific custom function UDF is as follows:
4. flow field solving arrangement
Reading the flow field analysis two-dimensional grid obtained in the step 1, modifying a model unit, checking the grid quality, and setting as an unsteady state solver;
secondly, creating a mesh interface coupling surface, setting a turbulence model as k-eplison (2equ), and setting materials by using a fluid material library: air, in turn loading the fluid inlet pressure UDF file;
loading a valve body motion UDF file, wherein the dynamic grid UDF file needs to be loaded by adopting a compiling mode, then setting boundary conditions, setting inlet Pressure Gauge Total Pressure as UDF, and setting outlet Pressure as 0 Pa;
setting parameters of a dynamic grid area, defining a moving area and a static area, then defining relaxation factors and convergence precision, selecting default settings of a system, finally initializing a flow field, setting dynamic monitoring and carrying out iterative calculation of a fluid model.
5. Analysis result review
Fig. 3 is a cloud representation of 0.00136s check valve velocity in accordance with an alternative embodiment of the present invention, and fig. 4 is a cloud representation of 0.0092s check valve velocity in accordance with an alternative embodiment of the present invention, as shown in fig. 3 and 4, which is a visual representation of the fluid movement within the check valve.
Example 2
According to another aspect of the embodiments of the present invention, there is also provided a processing apparatus of a check valve flow field, fig. 5 is a schematic view of the processing apparatus of a check valve flow field according to the embodiments of the present invention, as shown in fig. 5, the processing apparatus of a check valve flow field includes: an acquisition module 52, a tuning control module 54, and a generation module 56. The processing apparatus of the check valve flow field will be described in detail below.
An obtaining module 52, configured to obtain a flow passage grid map of the check valve; an adjusting control module 54, connected to the obtaining module 52, for adjusting the inlet air pressure of the check valve and controlling the valve body to move, so as to perform flow field simulation on the process of opening the check valve by the air pressure in the flow channel grid diagram, and obtain a flow field simulation result of the check valve; and a generating module 56, connected to the adjustment control module 54, for generating a flow field velocity cloud map of the check valve based on the flow field simulation result.
It should be noted that the above modules may be implemented by software or hardware, for example, for the latter, the following may be implemented: the modules can be located in the same processor; and/or the modules are located in different processors in any combination.
In the above embodiment, the processing device for the flow field of the check valve can perform transient flow field simulation on the whole movement process of the check valve by adjusting the inlet air pressure of the check valve and controlling the movement of the valve body, so as to achieve the purpose of generating a flow field velocity cloud chart of the check valve, thereby achieving the technical effect of more accurately knowing the flow law of fluid in the check valve movement engineering in detail, and further solving the technical problem of inaccurate analysis result due to the fact that the boundary conditions in the flow field analysis are dynamically changed.
It should be noted here that the above-mentioned acquiring module 52, adjusting control module 54 and generating module 56 correspond to steps S102 to S106 in embodiment 1, and the above-mentioned modules are the same as the examples and application scenarios realized by the corresponding steps, but are not limited to what is disclosed in embodiment 1 above.
Optionally, the apparatus further comprises: the establishing module is used for establishing a two-dimensional flow channel model of the check valve before acquiring a flow channel grid diagram of the check valve; and the first processing module is used for carrying out gridding processing on the two-dimensional flow channel model of the check valve to generate a flow channel grid diagram of the check valve.
Optionally, the apparatus further comprises: a setting module, configured to set a boundary condition of the flow channel grid map of the check valve after generating the flow channel grid map of the check valve, where the boundary condition of the flow channel grid map of the check valve includes at least one of: inlet and outlet air pressures to set the check valves, spring rate and equivalent mass to set the check valves.
Optionally, the adjustment control module 54 includes: an acquisition unit for acquiring a flow time of inlet air of the check valve; a first adjusting unit for adjusting an inlet air pressure of the check valve to a first air pressure when the flow time is less than or equal to a predetermined time; a second adjusting unit for adjusting the inlet air pressure of the check valve to a second air pressure when the flow time is greater than a predetermined time; wherein the first air pressure is greater than the second air pressure.
Optionally, the adjustment control module 54 includes: a first control unit for controlling the valve body of the check valve to maintain a current position in a case where the spring of the check valve is at a top dead center; and the second control unit is used for controlling the valve body of the check valve to continue moving under the condition that the spring of the check valve is not positioned at the top dead center.
Optionally, the apparatus further comprises: the judging module is used for judging whether a spring of the check valve moves to a top dead center or not before controlling the valve body of the check valve to move; the second processing module is used for enabling the valve body of the check valve to be positioned at a top dead center when the displacement of the spring of the check valve is larger than or equal to the total stroke and the resultant external force of the valve body of the check valve is larger than or equal to zero; wherein, the resultant external force is the difference between the fluid acting force and the elastic force of the spring.
Optionally, the generating module 56 includes: the determining unit is used for determining the air flow velocity distribution of the check valve at different moments according to the flow field simulation result; and the obtaining unit is used for obtaining a flow field velocity cloud chart of the check valve according to the air flow velocity distribution of the check valve at different moments.
Example 3
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein when the program runs, an apparatus where the computer-readable storage medium is located is controlled to execute the processing method of the check valve flow field in any one of the above.
Optionally, in this embodiment, the computer-readable storage medium may be located in any one of a group of computer terminals in a computer network and/or in any one of a group of mobile terminals, and the computer-readable storage medium includes a stored program.
Optionally, the program when executed controls an apparatus in which the computer-readable storage medium is located to perform the following functions: acquiring a flow passage grid diagram of the check valve; adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the flow passage grid diagram to obtain a flow field simulation result of the check valve; and generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
Example 4
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, where the program executes a processing method of the check valve flow field in any one of the above.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps: acquiring a flow passage grid diagram of the check valve; adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the flow passage grid diagram to obtain a flow field simulation result of the check valve; and generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
The invention also provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: acquiring a flow passage grid diagram of the check valve; adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the flow passage grid diagram to obtain a flow field simulation result of the check valve; and generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method of processing a check valve flow field, comprising:
acquiring a flow passage grid diagram of the check valve;
adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the runner grid diagram to obtain a flow field simulation result of the check valve;
and generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
2. The method of claim 1, further comprising, prior to obtaining the flow path grid map for the check valve:
establishing a two-dimensional flow channel model of the check valve;
and carrying out gridding treatment on the two-dimensional flow channel model of the check valve to generate the flow channel grid diagram of the check valve.
3. The method of claim 2, further comprising, after generating the flow path grid map for the check valve:
setting boundary conditions of a flow passage grid diagram of the check valve, wherein the boundary conditions of the flow passage grid diagram of the check valve include at least one of: setting inlet and outlet air pressures for the check valve, setting spring rate and equivalent mass for the check valve.
4. The method of claim 1, wherein adjusting the inlet air pressure of the check valve comprises:
acquiring the flow time of inlet air of the check valve;
adjusting an inlet air pressure of the check valve to a first air pressure when the flow time is less than or equal to a predetermined time;
adjusting an inlet air pressure of the check valve to a second air pressure when the flow time is greater than the predetermined time;
wherein the first air pressure is greater than the second air pressure.
5. The method of claim 1, wherein controlling the movement of the valve body of the check valve comprises:
controlling a valve body of the check valve to maintain a current position in a case where a spring of the check valve is at a top dead center;
and in the case that the spring of the check valve is not at the top dead center, controlling the valve body of the check valve to continue moving.
6. The method of claim 5, further comprising, prior to controlling movement of a valve body of the check valve:
judging whether a spring of the check valve moves to a top dead center or not;
when the displacement of the spring of the check valve is larger than or equal to the total stroke and the resultant external force of the valve body of the check valve is larger than or equal to zero, the valve body of the check valve is positioned at the top dead center;
wherein, the resultant external force is the difference between the fluid acting force and the elastic force of the spring.
7. The method of any of claims 1 to 6, wherein generating a flow field velocity cloud for the check valve based on the flow field simulation results comprises:
determining the air flow velocity distribution of the check valve at different moments according to the flow field simulation result;
and obtaining a flow field velocity cloud chart of the check valve according to the air flow velocity distribution of the check valve at different moments.
8. A check valve flow field treatment apparatus, comprising:
the acquisition module is used for acquiring a flow passage grid diagram of the check valve;
the adjusting control module is used for adjusting the inlet air pressure of the check valve and controlling the valve body to move so as to perform flow field simulation on the process of flushing the check valve by the air pressure in the runner grid diagram to obtain a flow field simulation result of the check valve;
and the generating module is used for generating a flow field velocity cloud chart of the check valve based on the flow field simulation result.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein when the program runs, the computer-readable storage medium controls an apparatus where the computer-readable storage medium is located to execute the processing method of the check valve flow field according to any one of claims 1 to 7.
10. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the processing method of the check valve flow field according to any one of claims 1 to 7 when running.
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| CN202110358361.3A CN113051687A (en) | 2021-04-01 | 2021-04-01 | Method and device for processing flow field of check valve |
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