A method, device, equipment and medium for measuring the oxygen content in an aeration tank

Abstract

The present application discloses a method, device, equipment and medium for measuring the oxygen content in an aeration tank, relating to the field of oxygen content measurement, including: inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relation among the velocity vector, the vorticity vector and the gas-liquid phase function to update the current vorticity vector, the current velocity vector and the current gas-liquid phase function of the fluid; determining the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficients 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 in combination with the updated current velocity vector; 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 the pre-determined cubic calculation domain of the aeration tank. The present application independently develops a non-contact measurement of the oxygen content in the aeration tank by real-time simulating the process of gas-liquid two-phase flow and oxygen solute transport, and provides support for optimizing the design of the aeration tank.

Description

Technical Field

[0001] The present invention relates to the field of oxygen content measurement, and particularly to a method, device, equipment and 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 sewage through nozzles. The tiny bubbles directly undergo oxygen solute exchange with the sewage, transferring the oxygen in the tiny bubbles to the sewage. The oxidation effect of oxygen is used to kill microorganisms and bacteria in the sewage, thereby achieving the purpose of sterilization. Since the specific surface area of the tiny bubbles is small, a large number of tiny bubbles can produce a huge oxygen exchange amount, which is one of the reasons why the aeration tank has become the mainstream sewage treatment technology. However, the optimal design of the aeration tank has always relied on experience, lacking a quantitative tool for designing the aeration tank and measuring the oxygen content in the aeration tank. 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 process of gas-liquid two-phase flow and oxygen solute transport in the aeration tank in real time, independently develop a 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 solutions are as follows:

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

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

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

[0007] 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 the cubic calculation domain pre-determined based on the aeration tank.

[0008] Optionally, the determination formula of the apparent diffusion coefficient includes:

[0009] ;

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

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

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

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

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

[0015] ;

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

[0017] Optionally, inputting the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship among the velocity vector, the vorticity vector, and the gas-liquid phase function to update the current vorticity vector, the current velocity vector, and the current gas-liquid phase function of the fluid includes:

[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 among the velocity vector, the vorticity vector, and the gas-liquid phase function to determine the current vorticity vector based on the current velocity vector, the current displacement vector, and the curl operator, and updating the current vorticity vector using the apparent kinematic viscosity and the surface tension vector of the fluid;

[0019] Determine the stream function vector based on the current displacement vector and the updated current vorticity vector, and determine the velocity potential function based on the current displacement vector and the current velocity vector, so as to update the current velocity vector by using the stream function vector and the velocity potential function, and update the current gas-liquid phase function by using the current displacement vector and the updated current velocity vector.

[0020] Optionally, before updating the current vorticity vector by using the apparent kinematic viscosity and the surface tension vector of the fluid, it further includes:

[0021] Determine the apparent dynamic viscosity of the fluid according to the dynamic viscosities of the liquid and the gas and the current gas-liquid phase function, and determine the apparent density of the fluid according to the densities 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 and the apparent density;

[0022] Determine the gas-liquid interface normal vector according to the current displacement vector and the current gas-liquid phase function, and 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.

[0023] Optionally, the coupling relation includes:

[0024] ;

[0025] ;

[0026] ;

[0027] ;

[0028] ;

[0029] wherein, the coupling relation adopts the Einstein summation convention, and represents three different directions, represents three different directions, represents three different directions, all represent the vorticity vector, represents the curl operator, all represent the velocity vector, all represent the displacement vector, t represents time, represents the apparent kinematic viscosity, represents the surface tension vector, all represent 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 oxygen content measuring device for an aeration tank, comprising:

[0031] A first update module, configured to input the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relation among the velocity vector, the vorticity vector, and the gas-liquid phase function, so as to update the current vorticity vector, the current velocity vector, and the current gas-liquid phase function of the fluid;

[0032] A second update module, configured to determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficients 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 by using the apparent diffusion coefficient and the updated current velocity vector;

[0033] An oxygen content measuring module, configured 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 pre-determined cubic calculation domain of the aeration tank.

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

[0035] A memory, configured to store a computer program;

[0036] A processor, configured to execute the computer program to implement the aforementioned oxygen content measuring method for the aeration tank.

[0037] In a fourth aspect, the present application provides a computer-readable storage medium, configured to store a computer program, and when the computer program is executed by a processor, the aforementioned oxygen content measuring method for the aeration tank is implemented.

[0038] In this application, the current velocity vector of the fluid in the aeration tank and the current gas-liquid phase function are input into the coupling relationship among the velocity vector, vorticity vector, and gas-liquid phase function to update the current vorticity vector, current velocity vector, and current gas-liquid phase function of the fluid; the apparent diffusion coefficient of the oxygen solute is determined based on the diffusion coefficients of the oxygen solute in the liquid and 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 the pre-determined cubic calculation domain 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 this application measures the oxygen content of the aeration tank at each moment by gradually solving the vorticity vector, velocity vector, gas-liquid phase function, and oxygen solute mass fraction in the aeration tank at each moment, so as to realize the non-contact measurement of the oxygen content of the aeration tank by real-time simulation of the process of gas-liquid two-phase flow and the process of oxygen solute transport in the aeration tank. On the one hand, it fills the gap in the field of non-contact measurement of the oxygen content of the aeration tank and realizes the autonomy and controllability of the self-developed source code software. On the other hand, it improves the measurement accuracy of the oxygen content of the aeration tank, and provides strong support for the optimized design of the aeration tank by accurately measuring the oxygen content of the aeration tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0040] Figure 1 It is a flowchart of a method for measuring the oxygen content of an aeration tank disclosed in this application;

[0041] Figure 2 It is a schematic diagram of the integral region of the oxygen content of an aeration tank disclosed in this application;

[0042] Figure 3 It is a schematic diagram of the structure of a device for measuring the oxygen content of an aeration tank disclosed in this application;

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

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] The principle of the aeration tank is to inject a large number of tiny bubbles into the sewage through nozzles. The tiny bubbles directly exchange oxygen solute with the sewage, transfer the oxygen in the tiny bubbles to the sewage, and use the oxidation of oxygen to kill the microorganisms and bacteria in the sewage, thereby achieving the purpose of sterilization. However, the optimal design of the aeration tank has always relied on experience, lacking quantitative tools for designing the aeration tank and measuring the oxygen content in the aeration tank. For this reason, the present application provides a method for measuring the oxygen content in the aeration tank. By real-time simulating the process of gas-liquid two-phase flow and oxygen solute transport in the aeration tank, it independently develops a non-contact measurement of the oxygen content in the aeration tank, and provides support for the optimal design of the aeration tank through the oxygen content in the aeration tank.

[0046] See Figure 1 As shown, the embodiments of the present invention disclose a method for measuring the oxygen content in the aeration tank, including:

[0047] Step S11: 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 vorticity vector, and the gas-liquid phase function to update the current vorticity vector, the current velocity vector, and the current gas-liquid phase function of the fluid.

[0048] In this embodiment, by 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 vorticity vector, and the gas-liquid phase function, the current vorticity vector is determined based on the current velocity vector, the current displacement vector, and the curl operator, and the current vorticity vector is updated using the apparent kinematic viscosity and the surface tension vector of the fluid to obtain the updated current vorticity vector. Then, the stream function vector is determined based on the current displacement vector and the updated current vorticity 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 the updated current velocity vector. Finally, the current gas-liquid phase function is updated using the current displacement vector and the updated current velocity vector to obtain the updated current gas-liquid phase function.

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

[0050] ;

[0051] ;

[0052] ;

[0053] ;

[0054] ;

[0055] wherein, the coupling relation adopts the Einstein summation convention, and represent three different directions, represent three different directions, represent three different directions, all represent vorticity vectors, represents the curl operator, all represent velocity vectors, all represent displacement vectors, t represents time, represents the apparent kinematic viscosity, represents the surface tension vector, all represent stream function vectors, represents the velocity potential function, represents the gas-liquid phase function. It should be noted that all vectors in this application are represented in the Einstein index form.

[0056] Taking as an example to illustrate the Einstein summation convention:

[0057] .

[0058] Moreover, in this embodiment, the Runge-Kutta third-order format (Runge-Kutta third-order format) is used to couple the Crank-Nicolson second-order format (Crank-Nicolson second-order format) to numerically discretize the unsteady time term , and a hybrid format of sixth-order compact difference coupling WENO5 (Weighted Essentially Non-Oscillatory) and the convection splitting technique are used to numerically discretize the nonlinear convection term , the second-order central difference format is used to numerically discretize the dissipation term and the vorticity stretching term , the second-order central difference format is used to discretize the curl term , the second derivative and are both discretized using the second-order central difference format, and the second-order central difference format is used to discretize the curl term .

[0059] Specifically, 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 among the velocity vector, the vorticity vector, and the gas-liquid phase function, so as to determine the current vorticity vector based on the current velocity vector, the current displacement vector, and the curl operator. The apparent kinematic viscosity of the fluid, the surface tension vector, the current displacement vector, the current velocity vector, the curl operator, and the vorticity vector at the current moment are used to determine the vorticity vector at the next moment, so as to update the current vorticity vector to obtain the updated current vorticity vector. It should be noted that the updated current vorticity vector is the vorticity vector at the next moment. Then, the stream function vector is determined based on the current displacement vector and the updated current vorticity 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 by using the stream function vector, the velocity potential function, the curl operator, and the current displacement vector to obtain the updated current velocity vector. Finally, the gas-liquid phase function at the next moment is determined by using the current displacement vector and the updated current velocity vector and based on the gas-liquid phase function at the current moment, so as to update the current gas-liquid phase function to obtain the updated current gas-liquid phase function, and 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 vorticity 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 first by using the boundary velocity, and the updated current velocity vector using the boundary velocity is substituted into to determine the current vorticity vector.

[0061] Before updating the current vorticity vector by using the apparent kinematic viscosity of the fluid and the surface tension vector, it is necessary to determine the apparent kinematic viscosity of the fluid and the surface tension vector first. Among them, for the determination of the apparent kinematic viscosity of the fluid, the apparent dynamic viscosity of the fluid can be determined first according to the dynamic viscosities of the liquid and the gas and the current gas-liquid phase function, and the apparent density of the fluid can be determined according to the densities of the liquid and the gas and the current gas-liquid phase function. Then, the apparent kinematic viscosity of the fluid is 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, represents the apparent kinematic viscosity.

[0064] For the determination of the surface tension vector of a fluid, the gas-liquid interface normal vector can be determined first according to the current displacement vector and the current gas-liquid phase function, and the curvature coefficient can be determined according to 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 involved formulas are as follows:

[0065] ;

[0066] ;

[0067] The above formulas all adopt the Einstein summation convention, and represents 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 gas-liquid interface normal vector.

[0068] Step S12: Determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficients 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.

[0069] In this embodiment, after updating the current velocity vector and the current gas-liquid phase function, first determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficients of the oxygen solute in the liquid and the gas and the updated current gas-liquid phase function, and then determine the oxygen solute mass fraction at the next moment based on the current displacement vector of the fluid, the apparent diffusion coefficient of the oxygen solute, and the updated current velocity vector and based on the oxygen solute mass fraction at the current moment to update the current oxygen solute mass fraction, so as to obtain 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 the oxygen solute is: ; represents the apparent diffusion coefficient of the oxygen solute, represents the gas-liquid phase function, represents the diffusion coefficient of the oxygen solute in the liquid, represents the diffusion coefficient of the oxygen solute in the gas.

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

[0072] Step S13, in the cubic calculation domain predetermined based on the aeration tank, 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.

[0073] In this embodiment, in the cubic calculation domain predetermined based on the aeration tank, the law of conservation of mass is adopted to measure the oxygen content of the aeration tank; wherein, the cubic calculation domain can be a cuboid calculation domain. Specifically, in the cubic calculation domain predetermined based on the aeration tank, 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.

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

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

[0076] It can be seen that this application measures the oxygen content of the aeration tank at each moment by gradually solving the vorticity vector, velocity vector, gas-liquid phase function, and oxygen solute mass fraction in the aeration tank, so as to realize the non-contact measurement of the oxygen content of the aeration tank by real-time simulation of the process of gas-liquid two-phase flow and the process of oxygen solute transport in the aeration tank. On the one hand, it fills the gap in the field of non-contact measurement of the oxygen content of the aeration tank and realizes the autonomy and controllability of the independent source code software. On the other hand, it improves the measurement accuracy of the oxygen content of the aeration tank, and provides strong support for the optimized design of the aeration tank through the accurately measured oxygen content of the aeration tank.

[0077] See Figure 3 As shown, an oxygen content measuring device for an aeration tank disclosed in an embodiment of the present invention includes:

[0078] A first update module 11, configured to input the current velocity vector and the current gas-liquid phase function of the fluid in the aeration tank into the coupling relationship among the velocity vector, the vorticity vector, and the gas-liquid phase function, so as to update the current vorticity vector, the current velocity vector, and the current gas-liquid phase function of the fluid;

[0079] A second update module 12, configured to determine the apparent diffusion coefficient of the oxygen solute based on the diffusion coefficients 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 by using the apparent diffusion coefficient and the updated current velocity vector;

[0080] An oxygen content measuring module 13, configured 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 pre-determined cubic calculation domain of the aeration tank.

[0081] It can be seen that in this application, by gradually solving the vorticity vector, the velocity vector, the gas-liquid phase function, and the oxygen solute mass fraction at each moment in the aeration tank, it is used to measure the oxygen content of the aeration tank at each moment, so as to realize the non-contact measurement of the oxygen content of the aeration tank by real-time simulation of the process of the gas-liquid two-phase flow and the process of oxygen solute transport in the aeration tank. On the one hand, it fills the blank in the field of non-contact measurement of the oxygen content of the aeration tank and realizes the autonomy and controllability of the self-source code software. On the other hand, it improves the measurement accuracy of the oxygen content of the aeration tank, and provides strong support for the optimal design of the aeration tank by accurately measuring the oxygen content of the aeration tank.

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

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

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

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

[0086] A first vector update unit, configured to input 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 relation between the velocity vector, the vorticity vector, and the gas-liquid phase function, to determine the current vorticity vector based on the current velocity vector, the current displacement vector, and the curl operator, and update the current vorticity vector by using the apparent kinematic viscosity and the surface tension vector of the fluid;

[0087] A second vector update unit, configured to determine the stream function vector based on the current displacement vector and the updated current vorticity vector, and determine the velocity potential function based on the current displacement vector and the current velocity vector, to update the current velocity vector by using the stream function vector and the velocity potential function, and update the current gas-liquid phase function by using the current displacement vector and the updated current velocity vector.

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

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

[0090] A tension vector determination unit, configured to determine the gas-liquid interface normal vector according to the current displacement vector and the current gas-liquid phase function, and determine the curvature coefficient according to the gas-liquid interface normal vector and the current displacement vector, 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, an embodiment of the present application also discloses an electronic device, Figure 4 It is a structural diagram of an electronic device 20 shown according to an exemplary embodiment, and the content in the figure should not be considered as any limitation to the scope of use of the present application.

[0092] Figure 4Schematic diagram of the structure of an electronic device 20 provided by 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. Among them, the memory 22 is used to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the oxygen content measurement method of the aeration tank disclosed in any of the foregoing 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 operating 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 external devices, and the communication protocol it follows is any communication protocol applicable to the technical solution of the present application, and no specific limitation is imposed thereon here; the input / output interface 25 is used to obtain external input data or output data to the outside, and its specific interface type can be selected according to specific application requirements, and no specific limitation is made here.

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

[0095] Among them, the operating system 221 is used to manage and control each hardware device and the computer program 222 on the electronic device 20, and it may be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program that can be used to complete the oxygen content measurement method of the aeration tank executed by the electronic device 20 disclosed in any of the foregoing embodiments, the computer program 222 may 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, it implements the oxygen content measurement method disclosed above. For the specific steps of this method, reference may be made to the corresponding content disclosed in the foregoing embodiments, and details will not be repeated here.

[0097] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments may 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 may be referred to the description of the method part.

[0098] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0099] The steps of the methods or algorithms described in combination with the embodiments disclosed herein can be directly implemented by hardware, software modules executed by a processor, or a combination of the two. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0100] Finally, it should also be noted that in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0101] The technical solutions provided in this application have been introduced in detail above. Specific examples are used herein to illustrate the principles and implementation manners of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this 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, 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; 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; Determine a stream function vector based on a current displacement vector and an updated current vortex vector, and determine a velocity potential function 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, and update the current gas-liquid phase function using the current displacement vector and the updated current velocity vector; Wherein, the coupling relation 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.

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 claim 1, 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.

6. An aeration tank oxygen content measuring device, characterized in that: The aeration tank oxygen content measuring device is used to implement the aeration tank oxygen content measuring method according to any one of claims 1 to 5, and the aeration tank oxygen content measuring device comprises: 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.

7. 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 5.

8. 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 the oxygen content in an aeration tank according to any one of claims 1 to 5.

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