Method, device and equipment for measuring oxygen content of aeration tank and medium

Abstract

The invention discloses an aeration tank oxygen content measurement method, device, equipment and medium, and relates to the field of oxygen content measurement, and the method comprises the steps: inputting a current velocity vector and a current gas-liquid phase function of a fluid in an aeration tank into a coupling relational expression among the velocity vector, the vortex vector and the gas-liquid phase function, the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid are updated; determining the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in liquid and gas and the updated current gas-liquid phase function, and updating the current oxygen solute mass fraction in combination with the updated current velocity vector; and measuring the oxygen content of the aeration tank according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function in a predetermined cubic computational domain based on the aeration tank. Through real-time simulation of the gas-liquid two-phase flow and the oxygen solute transport process, non-contact measurement of the oxygen content of the aeration tank is independently researched and developed, and support is provided for optimal design of the aeration tank.

Description

Technical Field

[0001] The invention relates to the field of oxygen content measurement, and in particular to a method, a device, equipment and a medium for measuring the oxygen content in an aeration tank. Background Art

[0002] The principle of an aeration tank is to inject a large number of tiny bubbles into the sewage through a nozzle. The tiny bubbles directly exchange oxygen solutes with the sewage, transfer the oxygen in the tiny bubbles to the sewage, and use the oxidation effect of oxygen to kill microorganisms and bacteria in the sewage, thereby achieving the purpose of sterilization. Due to the small specific surface area of ​​tiny bubbles, a large number of tiny bubbles can produce a huge amount of oxygen exchange, which is one of the reasons why aeration tanks have become the mainstream sewage treatment technology. However, the optimal design of aeration tanks has always relied on experience, and there is a lack of quantitative tools for designing aeration tanks and measuring the oxygen content of aeration tanks. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for measuring the oxygen content in an aeration tank, which can simulate the gas-liquid two-phase flow and oxygen solute transport process in the aeration tank in real time, independently develop non-contact measurement of the oxygen content in the aeration tank, and provide support for optimizing the design of the aeration tank through the oxygen content in the aeration tank. The specific scheme is as follows:

[0004] In a first aspect, the present application provides a method for measuring oxygen content in an aeration tank, comprising:

[0005] Inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid;

[0006] Determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and update the current oxygen solute mass fraction using the apparent diffusion coefficient and the updated current velocity vector;

[0007] In a cubic calculation domain predetermined based on the aeration tank, the oxygen content of the aeration tank is measured according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function.

[0008] Optionally, the formula for determining the apparent diffusion coefficient includes:

[0009] ;

[0010] in, represents the apparent diffusion coefficient, represents the gas-liquid phase function, represents the diffusion coefficient of oxygen solute in liquid, It represents the diffusion coefficient of oxygen solute in gas.

[0011] Optionally, the updating of the current oxygen solute mass fraction by using the apparent diffusion coefficient and the updated current velocity vector includes:

[0012] Determine the oxygen solute mass fraction at the next moment based on the oxygen solute mass fraction at the current moment by using the current displacement vector of the fluid, the apparent diffusion coefficient and the updated current velocity vector, so as to update the current oxygen solute mass fraction;

[0013] Among them, the update formula of oxygen solute mass fraction is: ; represents the mass fraction of oxygen solute, t represents time, represents the apparent diffusion coefficient, represents the displacement vector, represents the velocity vector; and the updated formula for the oxygen solute mass fraction adopts the Einstein summation convention, Indicates three different directions.

[0014] Optionally, the measurement formula for the oxygen content of the aeration tank includes:

[0015] ;

[0016] in, represents the oxygen content of the aeration tank, represents the mass fraction of oxygen solute, represents the gas-liquid phase function, Represents the length, height, and width of the cube computational domain.

[0017] Optionally, the step of inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid comprises:

[0018] Inputting the current velocity vector, the current gas-liquid phase function and the current displacement vector of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function, so as to determine the current vortex vector based on the current velocity vector, the current displacement vector and the curl operator, and updating the current vortex vector using the apparent kinematic viscosity and the surface tension vector of the fluid;

[0019] A flow function vector is determined based on the current displacement vector and the updated current vortex vector, and a velocity potential function is determined based on the current displacement vector and the current velocity vector, so that the current velocity vector is updated using the flow function vector and the velocity potential function, and the current gas-liquid phase function is updated using the current displacement vector and the updated current velocity vector.

[0020] Optionally, before the current vortex vector is updated using the apparent kinematic viscosity and the surface tension vector of the fluid, the method further includes:

[0021] Determining the apparent dynamic viscosity of the fluid according to the dynamic viscosity of the liquid and the gas and the current gas-liquid phase function, and determining the apparent density of the fluid according to the density of the liquid and the gas and the current gas-liquid phase function, so as to determine the apparent kinematic viscosity of the fluid based on the ratio of the apparent dynamic viscosity to the apparent density;

[0022] The gas-liquid interface normal vector is determined according to the current displacement vector and the current gas-liquid phase function, and the curvature coefficient is determined according to the gas-liquid interface normal vector and the current displacement vector, so as to determine the surface tension vector based on the gas-liquid interface normal vector, the curvature coefficient, the current displacement vector and the current gas-liquid phase function.

[0023] Optionally, the coupling relationship includes:

[0024] ;

[0025] ;

[0026] ;

[0027] ;

[0028] ;

[0029] Wherein, the coupling relation adopts the Einstein summation convention, and Indicates three different directions. Indicates three different directions. Indicates three different directions. are vortex vectors, represents the curl operator, are velocity vectors, All represent displacement vectors, t represents time, represents the apparent kinematic viscosity, represents the surface tension vector, denotes the stream function vector, represents the velocity potential function, represents the gas-liquid phase function.

[0030] In a second aspect, the present application provides an aeration tank oxygen content measuring device, comprising:

[0031] A first updating module is used to input the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid;

[0032] A second updating module, configured to determine an apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and to update the current oxygen solute mass fraction using the apparent diffusion coefficient and the updated current velocity vector;

[0033] The oxygen content measurement module is used to measure the oxygen content of the aeration tank according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function in a cubic calculation domain predetermined based on the aeration tank.

[0034] In a third aspect, the present application provides an electronic device, including:

[0035] Memory, used to store computer programs;

[0036] A processor is used to execute the computer program to implement the aforementioned method for measuring oxygen content in an aeration tank.

[0037] In a fourth aspect, the present application provides a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the aforementioned method for measuring oxygen content in an aeration tank.

[0038] In the present application, the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank are input into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid; the apparent diffusion coefficient of the oxygen solute is determined based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and the current oxygen solute mass fraction is updated using the apparent diffusion coefficient and the updated current velocity vector; in a cubic calculation domain predetermined based on the aeration tank, the oxygen content of the aeration tank is measured according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function. It can be seen that the present application gradually solves the vortex vector, velocity vector, gas-liquid phase function and oxygen solute mass fraction at each moment in the aeration tank to measure the oxygen content of the aeration tank at each moment, thereby realizing non-contact measurement of the oxygen content in the aeration tank by real-time simulation of the gas-liquid two-phase flow process and the oxygen solute transport process in the aeration tank. On the one hand, it fills the gap in the field of non-contact measurement of oxygen content in aeration tanks and realizes autonomous control of independent source code software. On the other hand, it improves the measurement accuracy of oxygen content in aeration tanks, and provides strong support for optimizing the design of aeration tanks through accurately measuring oxygen content in aeration tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0040] Figure 1 This is a flow chart of a method for measuring oxygen content in an aeration tank disclosed in the present application;

[0041] Figure 2 This is a schematic diagram of an oxygen content integration area of ​​an aeration tank disclosed in the present application;

[0042] Figure 3 This is a schematic structural diagram of an aeration tank oxygen content measuring device disclosed in this application;

[0043] Figure 4 This is a structural diagram of an electronic device disclosed in this application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The principle of an aeration tank is to inject a large number of tiny bubbles into sewage through a nozzle. The tiny bubbles directly exchange oxygen solutes with the sewage, transfer the oxygen in the tiny bubbles to the sewage, and use the oxidizing effect of oxygen to kill the microorganisms and bacteria in the sewage, thereby achieving the purpose of sterilization. However, the optimal design of aeration tanks has always relied on experience, and there is a lack of quantitative tools to design aeration tanks and measure the oxygen content of aeration tanks. To this end, the present application provides a method for measuring the oxygen content of an aeration tank. By simulating the gas-liquid two-phase flow and oxygen solute transport process in an aeration tank in real time, the non-contact measurement of the oxygen content of an aeration tank is independently developed, and support is provided for the optimal design of an aeration tank through the oxygen content of the aeration tank.

[0046] See also Figure 1 As shown, the embodiment of the present invention discloses a method for measuring oxygen content in an aeration tank, comprising:

[0047] Step S11, inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid.

[0048] In this embodiment, the current velocity vector, the current gas-liquid phase function and the current displacement vector of the fluid in the aeration tank are input into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function, so as to determine the current vortex vector based on the current velocity vector, the current displacement vector and the curl operator, and the current vortex vector is updated using the apparent kinematic viscosity and the surface tension vector of the fluid to obtain an updated current vortex vector, and then the stream function vector is determined based on the current displacement vector and the updated current vortex vector, and the velocity potential function is determined based on the current displacement vector and the current velocity vector, so as to update the current velocity vector using the stream function vector and the velocity potential function to obtain an updated current velocity vector, and finally the current gas-liquid phase function is updated using the current displacement vector and the updated current velocity vector to obtain an updated current gas-liquid phase function.

[0049] Among them, the coupling relationship between the velocity vector, vortex vector and gas-liquid phase function is as follows:

[0050] ;

[0051] ;

[0052] ;

[0053] ;

[0054] ;

[0055] The coupling relation adopts the Einstein summation convention, and Indicates three different directions. Indicates three different directions. Indicates three different directions. are vortex vectors, represents the curl operator, are velocity vectors, All represent displacement vectors, t represents time, represents the apparent kinematic viscosity, represents the surface tension vector, denotes the stream function vector, represents the velocity potential function, It should be noted that all vectors in this application are expressed in the form of Einstein indicators.

[0056] by Take the example of Einstein's summation convention:

[0057] .

[0058] In addition, this embodiment uses the Runge-Kutta third-order format (Runge-Kutta third-order format) coupled with the Crank-Nicolson second-order format (Crank-Nicholson second-order format) to numerically discretize the unsteady time term The nonlinear convection term is numerically discretized using a hybrid format of sixth-order compact differential coupling WENO5 (Weighted Essentially Non-Oscillatory) and convection splitting technology. , the dissipative term is numerically discretized using the second-order central difference scheme and vortex stretching term , using the second-order central difference format to discretize the curl term , the second-order derivative and Both use the second-order central difference format to discretize the curl term. .

[0059] Specifically, this embodiment inputs the current velocity vector, the current gas-liquid phase function and the current displacement vector of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function, so as to determine the current vortex vector based on the current velocity vector, the current displacement vector and the curl operator, and uses the apparent kinematic viscosity and surface tension vector of the fluid, the current displacement vector, the current velocity vector, the curl operator and the vortex vector at the current moment to determine the vortex vector at the next moment, so as to update the current vortex vector to obtain an updated current vortex vector; it should be noted that the updated current vortex vector is the vortex vector at the next moment. Then, the stream function vector is determined based on the current displacement vector and the updated current vortex vector, and the velocity potential function is determined based on the current displacement vector and the current velocity vector. The current velocity vector is updated using the stream function vector, the velocity potential function, the curl operator and the current displacement vector to obtain an updated current velocity vector. Finally, the gas-liquid phase function at the next moment is determined based on the gas-liquid phase function at the current moment using the current displacement vector and the updated current velocity vector to update the current gas-liquid phase function to obtain an updated current gas-liquid phase function. The updated current gas-liquid phase function is the gas-liquid phase function at the next moment.

[0060] It should be noted that for determining the current vortex vector based on the current velocity vector, the current displacement vector and the curl operator, when considering the boundary velocity of the fluid at the wall of the aeration tank, the current velocity vector can be updated using the boundary velocity first, and the current velocity vector updated using the boundary velocity is substituted into To determine the current vortex vector.

[0061] Before using the apparent kinematic viscosity and surface tension vector of the fluid to update the current vortex vector, it is necessary to first determine the apparent kinematic viscosity and surface tension vector of the fluid. To determine the apparent kinematic viscosity of the fluid, the apparent dynamic viscosity of the fluid can be determined based on the dynamic viscosity of the liquid and gas and the current gas-liquid phase function, and the apparent density of the fluid can be determined based on the density of the liquid and gas and the current gas-liquid phase function, and then the apparent kinematic viscosity of the fluid can be determined based on the ratio of the apparent dynamic viscosity and the apparent density of the fluid. The formulas involved are as follows:

[0062] ;

[0063] represents the apparent density, represents the gas-liquid phase function, represents the density of the liquid, represents the density of the gas, represents the apparent dynamic viscosity, represents the dynamic viscosity of the liquid, represents the dynamic viscosity of the gas, Indicates apparent kinematic viscosity.

[0064] To determine the surface tension vector of the fluid, the gas-liquid interface normal vector can be determined based on the current displacement vector and the current gas-liquid phase function, and the curvature coefficient can be determined based on the gas-liquid interface normal vector and the current displacement vector. Then, the surface tension vector can be determined based on the gas-liquid interface normal vector, the curvature coefficient, the current displacement vector and the current gas-liquid phase function. The formulas involved are as follows:

[0065] ;

[0066] ;

[0067] The above formulas all use the Einstein summation convention, and Indicates three different directions. represents the surface tension vector, represents the surface tension coefficient, represents the curvature coefficient, represents the displacement vector, represents the gas-liquid phase function, represents the normal vector of the air-liquid interface.

[0068] Step S12: determining the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and updating the current oxygen solute mass fraction using the apparent diffusion coefficient and the updated current velocity vector.

[0069] In this embodiment, after the current velocity vector and the current gas-liquid phase function are updated, the apparent diffusion coefficient of the oxygen solute is first determined based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and then the oxygen solute mass fraction at the next moment is determined based on the oxygen solute mass fraction at the current moment using the current displacement vector of the fluid, the apparent diffusion coefficient of the oxygen solute and the updated current velocity vector, so as to update the current oxygen solute mass fraction, thereby obtaining the updated current oxygen solute mass fraction. It should be noted that the updated current oxygen solute mass fraction is the oxygen solute mass fraction at the next moment.

[0070] Among them, the formula for determining the apparent diffusion coefficient of oxygen solute is: ; represents the apparent diffusion coefficient of oxygen solute, represents the gas-liquid phase function, represents the diffusion coefficient of oxygen solute in liquid, It represents the diffusion coefficient of oxygen solute in gas.

[0071] Among them, the update formula of oxygen solute mass fraction is: ; represents the mass fraction of oxygen solute, t represents time, represents the apparent diffusion coefficient of oxygen solute, represents the displacement vector, represents the velocity vector; and the updated formula for the oxygen solute mass fraction adopts the Einstein summation convention, Indicates three different directions.

[0072] Step S13: In a cubic calculation domain predetermined based on the aeration tank, the oxygen content of the aeration tank is measured according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function.

[0073] In this embodiment, in a cubic calculation domain predetermined based on the aeration tank, the law of conservation of mass is used to measure the oxygen content of the aeration tank; wherein the cubic calculation domain may be a rectangular calculation domain. Specifically, in a cubic calculation domain predetermined based on the aeration tank, the oxygen content of the aeration tank is measured according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function.

[0074] Among them, the measurement formula of the oxygen content in the aeration tank includes: ; Indicates the oxygen content of the aeration tank. represents the mass fraction of oxygen solute, represents the gas-liquid phase function, Indicates the length, height, and width of the cube calculation domain.

[0075] by Figure 2 For example, in the rectangular calculation domain predetermined based on the aeration tank, the length, height, and width of the rectangular calculation domain can be expressed as , the three different directions corresponding to the rectangular computational domain can be expressed as ; For the measurement of oxygen content in the aeration tank, the oxygen content in the aeration tank can be measured in the rectangular calculation domain according to the current oxygen solute mass fraction and the current gas-liquid phase function. Among them, the dV stereo box gives a schematic diagram of oxygen bubbles in the microelement, and the shaded part represents the gas-liquid phase function in the rectangular calculation domain. part, Indicates that there is oxygen in this part.

[0076] It can be seen that the present application gradually solves the vortex vector, velocity vector, gas-liquid phase function and oxygen solute mass fraction at each moment in the aeration tank to measure the oxygen content of the aeration tank at each moment, thereby realizing non-contact measurement of the oxygen content in the aeration tank by real-time simulation of the gas-liquid two-phase flow process and the oxygen solute transport process in the aeration tank. On the one hand, it fills the gap in the field of non-contact measurement of oxygen content in aeration tanks and realizes autonomous control of independent source code software. On the other hand, it improves the measurement accuracy of oxygen content in aeration tanks, and provides strong support for optimizing the design of aeration tanks through accurately measuring oxygen content in aeration tanks.

[0077] See also Figure 3 As shown, the embodiment of the present invention discloses an aeration tank oxygen content measuring device, comprising:

[0078] A first updating module 11 is used to input the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid;

[0079] A second updating module 12 is used to determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and to update the current oxygen solute mass fraction using the apparent diffusion coefficient and the updated current velocity vector;

[0080] The oxygen content measurement module 13 is used to measure the oxygen content of the aeration tank according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function in a cubic calculation domain predetermined based on the aeration tank.

[0081] It can be seen that the present application gradually solves the vortex vector, velocity vector, gas-liquid phase function and oxygen solute mass fraction at each moment in the aeration tank to measure the oxygen content of the aeration tank at each moment, thereby realizing non-contact measurement of the oxygen content in the aeration tank by real-time simulation of the gas-liquid two-phase flow process and the oxygen solute transport process in the aeration tank. On the one hand, it fills the gap in the field of non-contact measurement of oxygen content in aeration tanks and realizes autonomous control of independent source code software. On the other hand, it improves the measurement accuracy of oxygen content in aeration tanks, and provides strong support for optimizing the design of aeration tanks through accurately measuring oxygen content in aeration tanks.

[0082] In some specific embodiments, the second updating module 12 includes:

[0083] an oxygen solute mass fraction updating unit, configured to determine the oxygen solute mass fraction at the next moment based on the oxygen solute mass fraction at the current moment by using the current displacement vector of the fluid, the apparent diffusion coefficient and the updated current velocity vector, so as to update the current oxygen solute mass fraction;

[0084] Among them, the update formula of oxygen solute mass fraction is: ; represents the mass fraction of oxygen solute, t represents time, represents the apparent diffusion coefficient, represents the displacement vector, represents the velocity vector; and the updated formula for the oxygen solute mass fraction adopts the Einstein summation convention, Indicates three different directions.

[0085] In some specific embodiments, the first updating module 11 includes:

[0086] a first vector updating unit, for inputting a current velocity vector, a current gas-liquid phase function and a current displacement vector of the fluid in the aeration tank into a coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function, so as to determine a current vortex vector based on the current velocity vector, the current displacement vector and the curl operator, and to update the current vortex vector using the apparent kinematic viscosity and the surface tension vector of the fluid;

[0087] The second vector updating unit is used to determine the flow function vector based on the current displacement vector and the updated current vortex vector, and to determine the velocity potential function based on the current displacement vector and the current velocity vector, so as to update the current velocity vector using the flow function vector and the velocity potential function, and to update the current gas-liquid phase function using the current displacement vector and the updated current velocity vector.

[0088] In some specific embodiments, the aeration tank oxygen content measuring device further includes:

[0089] a kinematic viscosity determination unit, configured to determine the apparent dynamic viscosity of the fluid according to the dynamic viscosity of the liquid and the gas and a current gas-liquid phase function, and to determine the apparent density of the fluid according to the density of the liquid and the gas and a current gas-liquid phase function, so as to determine the apparent kinematic viscosity of the fluid based on a ratio of the apparent dynamic viscosity to the apparent density;

[0090] A tension vector determination unit is used to determine the gas-liquid interface normal vector according to the current displacement vector and the current gas-liquid phase function, and to determine the curvature coefficient according to the gas-liquid interface normal vector and the current displacement vector, so as to determine the surface tension vector based on the gas-liquid interface normal vector, the curvature coefficient, the current displacement vector and the current gas-liquid phase function.

[0091] Furthermore, the present application also discloses an electronic device. Figure 4 This is a structural diagram of an electronic device 20 according to an exemplary embodiment. The content in the diagram cannot be considered as any limitation on the scope of use of the present application.

[0092] Figure 4The present invention provides a schematic diagram of the structure of an electronic device 20 provided in an embodiment of the present application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 is used to store a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the aeration tank oxygen content measurement method disclosed in any of the aforementioned embodiments. In addition, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0093] In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and the external device, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0094] In addition, the memory 22, as a carrier for storing resources, can be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon can include an operating system 221, a computer program 222, etc., and the storage method can be temporary storage or permanent storage.

[0095] The operating system 221 is used to manage and control the hardware devices and computer program 222 on the electronic device 20, and can be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program that can be used to complete the aeration tank oxygen content measurement method performed by the electronic device 20 disclosed in any of the aforementioned embodiments, the computer program 222 can further include computer programs that can be used to complete other specific tasks.

[0096] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the aforementioned aeration tank oxygen content measurement method is implemented. The specific steps of the method can refer to the corresponding contents disclosed in the aforementioned embodiments, and will not be repeated here.

[0097] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0098] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0099] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0100] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0101] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for measuring oxygen content in an aeration tank, characterized in that: include: Inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid; Determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and update the current oxygen solute mass fraction using the apparent diffusion coefficient and the updated current velocity vector; In a cubic calculation domain predetermined based on the aeration tank, the oxygen content of the aeration tank is measured according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function.

2. The method for measuring oxygen content in an aeration tank according to claim 1, characterized in that: The formula for determining the apparent diffusion coefficient includes: ； in, represents the apparent diffusion coefficient, represents the gas-liquid phase function, represents the diffusion coefficient of oxygen solute in liquid, It represents the diffusion coefficient of oxygen solute in gas.

3. The method for measuring oxygen content in an aeration tank according to claim 1, characterized in that: The updating of the current oxygen solute mass fraction by using the apparent diffusion coefficient and the updated current velocity vector comprises: Determine the oxygen solute mass fraction at the next moment based on the oxygen solute mass fraction at the current moment by using the current displacement vector of the fluid, the apparent diffusion coefficient and the updated current velocity vector, so as to update the current oxygen solute mass fraction; Among them, the update formula of oxygen solute mass fraction is: ; represents the mass fraction of oxygen solute, t represents time, represents the apparent diffusion coefficient, represents the displacement vector, represents the velocity vector; and the updated formula for the oxygen solute mass fraction adopts the Einstein summation convention, Indicates three different directions.

4. The method for measuring oxygen content in an aeration tank according to claim 1, characterized in that: The measurement formula of the oxygen content in the aeration tank includes: ； in, represents the oxygen content of the aeration tank, represents the mass fraction of oxygen solute, represents the gas-liquid phase function, Represents the length, height, and width of the cube computational domain.

5. The method for measuring oxygen content in an aeration tank according to any one of claims 1 to 4, characterized in that: The step of inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid comprises: Inputting the current velocity vector, the current gas-liquid phase function and the current displacement vector of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function, so as to determine the current vortex vector based on the current velocity vector, the current displacement vector and the curl operator, and updating the current vortex vector using the apparent kinematic viscosity and the surface tension vector of the fluid; A flow function vector is determined based on the current displacement vector and the updated current vortex vector, and a velocity potential function is determined based on the current displacement vector and the current velocity vector, so that the current velocity vector is updated using the flow function vector and the velocity potential function, and the current gas-liquid phase function is updated using the current displacement vector and the updated current velocity vector.

6. The method for measuring oxygen content in an aeration tank according to claim 5, characterized in that: Before the current vortex vector is updated by using the apparent kinematic viscosity and the surface tension vector of the fluid, the method further includes: Determining the apparent dynamic viscosity of the fluid according to the dynamic viscosity of the liquid and the gas and the current gas-liquid phase function, and determining the apparent density of the fluid according to the density of the liquid and the gas and the current gas-liquid phase function, so as to determine the apparent kinematic viscosity of the fluid based on the ratio of the apparent dynamic viscosity to the apparent density; The gas-liquid interface normal vector is determined according to the current displacement vector and the current gas-liquid phase function, and the curvature coefficient is determined according to the gas-liquid interface normal vector and the current displacement vector, so as to determine the surface tension vector based on the gas-liquid interface normal vector, the curvature coefficient, the current displacement vector and the current gas-liquid phase function.

7. The method for measuring oxygen content in an aeration tank according to claim 6, characterized in that: The coupling relationship includes: ； ； ； ； ； Wherein, the coupling relation adopts the Einstein summation convention, and Indicates three different directions. Indicates three different directions. Indicates three different directions. are vortex vectors, represents the curl operator, are velocity vectors, All represent displacement vectors, t represents time, represents the apparent kinematic viscosity, represents the surface tension vector, denotes the stream function vector, represents the velocity potential function, represents the gas-liquid phase function.

8. An aeration tank oxygen content measuring device, characterized in that: include: A first updating module is used to input the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship between the velocity vector, the vortex vector and the gas-liquid phase function to update the current vortex vector, the current velocity vector and the current gas-liquid phase function of the fluid; A second updating module, configured to determine an apparent diffusion coefficient of the oxygen solute based on the diffusion coefficient of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and to update the current oxygen solute mass fraction using the apparent diffusion coefficient and the updated current velocity vector; The oxygen content measurement module is used to measure the oxygen content of the aeration tank according to the updated current oxygen solute mass fraction and the updated current gas-liquid phase function in a cubic calculation domain predetermined based on the aeration tank.

9. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the method for measuring oxygen content in an aeration tank according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Used to store a computer program, which, when executed by a processor, implements the method for measuring oxygen content in an aeration tank according to any one of claims 1 to 7.

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