CN107016203A - A kind of method for numerical simulation of photovoltaic water pump internal flow - Google Patents
A kind of method for numerical simulation of photovoltaic water pump internal flow Download PDFInfo
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- CN107016203A CN107016203A CN201710244653.8A CN201710244653A CN107016203A CN 107016203 A CN107016203 A CN 107016203A CN 201710244653 A CN201710244653 A CN 201710244653A CN 107016203 A CN107016203 A CN 107016203A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
Abstract
The invention discloses a kind of method for numerical simulation of photovoltaic water pump internal flow.The present invention process be：Three-dimensional modeling and mesh generation are carried out to photovoltaic water pump internal calculation region, and grid file is imported into setting primary condition and boundary condition in Fluent；The simulation model of photovoltaic battery panel, controller, motor is set up using Matlab/Simulink, the rotating speed of pump is calculated in real time；It is combined by Fluent User-Defined Functions (UDF) and Simulink M function, realizes and carry out data exchange between software；Photovoltaic water pump internal flow is calculated using Fluent, according to Simulink simulation result real-time update rotating speed and inlet boundary condition during solution.The present invention can carry out numerical simulation according to the actual motion condition of photovoltaic water pump to its internal flow, so that numerical result is more accurate, finally can provide correct theoretical foundation for the design of photovoltaic water pump.
Description
Technical field
The invention belongs to fluid machinery engineering field, it is related to a kind of method for numerical simulation of photovoltaic water pump internal flow.
Background technology
Solar energy is converted into electric energy by the Volta effect that photovoltaic water pump is produced using photovoltaic, then by controller and
Inverter AC motor drives water pump operation to be drawn water.Photovoltaic water pump begins work at sunrise, ending at sunset, unattended, with energy
Consumption is low, economize on resources, it is easy to use the advantages of, while energy-conservation, water saving, the agriculture purpose increased production, increased income can effectively be reached,
One of prior development direction as following energy-saving and emission-reduction and water-saving irrigation etc..
In actual moving process, because the unstability of solar radiation causes the rotating speed of photovoltaic water pump to be continually changing,
So that photovoltaic water pump is run under variable working condition always.With the development of CFD technologies, numerical simulation undoubtedly turns into be disclosed in pump
The best instrument of portion's flowing law.But light radiation intensity is continually changing the unstability that result in photovoltaic water pump rotating speed, because
And to flow the inter-flow simulation that CFD computational methods cannot be directly used to photovoltaic water pump in traditional water pump.Therefore, in photovoltaic water pump
The method for numerical simulation of portion's flowing turns into a difficult point of field of fluid machinery.
To solve the above problems, being necessary to seek a kind of can precisely simulate the numerical computations side of photovoltaic water pump internal flow
Method, mechanism is flowed to disclose in photovoltaic water pump, so as to be provided fundamental basis for the design of photovoltaic water pump.
The content of the invention
Regarding to the issue above and difficult point, it is an object of the invention to set up under the conditions of a kind of variable speed to flow inside photovoltaic water pump
The exact method of dynamic numerical simulation.
The technical solution adopted for the present invention to solve the technical problems is：
The three dimensional fluid computational fields of photovoltaic water pump are built using 3D sculpting software Creo, UG or Solidworks
Mould；The discrete shape that mesh generation generates computational fields is carried out to three dimensional fluid computational fields by mesh generation software I CEM or Gambit
Formula, and carry out grid relevance verification；The emulation mould of photovoltaic battery panel, controller, motor is set up using Matlab/Simulink
Type, calculates the rotating speed of photovoltaic water pump in real time；The three dimensional fluid computational fields grid file of obtained optimal photovoltaic water pump is imported
In Fluent softwares, the boundary condition and primary condition of solving model are set；Photovoltaic water pump internal flow is entered using Fluent
Row is calculated, according to Matlab/Simulink simulation result real-time update rotating speed and boundary condition during calculating；To meter
Result is calculated to be post-processed.
It is comprised the following steps that：
Step 1, using 3D sculpting software Creo, UG or Solidworks the three dimensional fluid computational fields of photovoltaic water pump are entered
Row modeling, is comprised the following steps that：
(A) three dimensional fluid computational fields mainly include following components：Inducer, cavity, impeller water body, diffuser water body
And outlet section；
(B) the three dimensional fluid calculating domain model of each several part is assembled.
Step 2, by mesh generation software I CEM or Gambit to three dimensional fluid computational fields carry out mesh generation generation count
The discrete form in domain is calculated, and carries out grid relevance verification, is comprised the following steps that：(A) fluid calculation domain assembly is imported into net
Lattice are divided in software I CEM or Gambit, define the face in fluid calculation domain, and divide high-quality mess generation computational fields from
The form of dissipating.；
(B) in order to ensure computational accuracy, it is necessary to which the lift for calculating prediction with steady state values is predicted as criterion and carries out net
Lattice relevance verification, thinks that grid reaches computational accuracy, now to be optimal when the front and rear difference of prediction lift twice is less than 1%
Value；
Wherein, steady state values calculate selection standard k- ε models, and pump inlet is set as the mass flow under design conditions, pump
Outlet is set as free discharge condition, and impeller is defined as rotating reference frame, and setting speed is rated speed, and remaining calculates stream
Body domain is defined as connection between rest frame, subdomain and carried out data transmission using interface Mesh Interfaces, is calculated
In to wall assume without slip boundary condition.
Step 3, the simulation model for setting up using Matlab/Simulink photovoltaic battery panel, controller, motor, in real time meter
The rotating speed of photovoltaic water pump is calculated, is comprised the following steps that：
(A) intensity of illumination and photovoltaic battery panel output voltage U and electric current I relation during temperature change are：
Wherein,
C2=(Um/UOC-1)/ln(1-Im/ISC),
Δ U=- β Δs T-RSΔ I,
Δ T=T-Tref,
T is the temperature of solar cell, DEG C；TrefFor reference temperature value, 25 DEG C；G is the intensity of illumination of the sun, W/m2；
GrefTo refer to intensity of illumination, 1000W/m2；ISCFor for short circuit current flow, ImFor the electric current at maximum power point, A；UOCFor open circuit electricity
Pressure, UmFor the voltage at maximum power point, V；α is current temperature coefficient, A/ DEG C under the conditions of reference light shines；β is that reference light shines bar
Voltage temperature coefficient under part, V/ DEG C；RSFor the resistance of photovoltaic array, Ω；
The Simulink simulation models of photovoltaic battery panel are set up according to formula (1).
(B) according to MPPT maximum power point tracking algorithm (perturbation observation method, constant voltage process, neural network, fuzzy control
Deng) the course of work write maximal power tracing controller algorithm, set up controller Simulink simulation models；
(C) permagnetic synchronous motor mathematical modeling is expressed as：
Its electromagnetic torque TeIt is expressed as：
Wherein, subscript d and q represent (d, q) axis component, ν respectivelydAnd νqFor stator voltage, LdAnd LqFor stator inductance, idWith
iqFor stator electric current, RsIt is the every phase resistance of stator, ψfIt is that, as the rotor flux caused by rotor permanent magnet frame, p represents differential operator,
ωmFor angular speed.
The Simulink models of motor are set up according to formula (2) and formula (3).
Step 4, the fluid calculation domain grid file of photovoltaic water pump imported in Fluent softwares, the side of solving model is set
Boundary's condition and primary condition, are comprised the following steps that：.
(A) the fluid calculation domain grid file for the optimal a set of photovoltaic water pump for obtaining step 2 imports Fluent softwares
In, carry out unsteady computation；
(B) boundary condition and primary condition of solving model are set：Selection standard k- ε models, pump inlet is set as quality
Flow, the rotating speed that the size of its value is exported according to Simulink is calculated by similarity law, and pump discharge is set as free discharge
Condition, impeller is defined as rotating reference frame, and tachometer value is exported by Simulink, and remaining calculates fluid domain and is defined as static seat
Mark system；Connection is carried out data transmission using interface (Mesh Interfaces) between subdomain, and wall is assumed to be in calculating
Non-slip condition, impeller often rotates 1 degree and once calculated, i.e., impeller, which rotates a circle, in unsteady computation needs 360 time steps
It is long, according to the corresponding time step of speed setting, dynamic ten circle of impeller corotation.
Step 5, using Fluent photovoltaic water pump internal flow is calculated, according to Matlab/ during calculating
Simulink simulation result real-time update rotating speed and boundary condition.
(A) collaborative simulation needs to carry out data transfer, the operating mechanism of two kinds of software between Simulink and Fluent
Difference, the present invention is by the way of embedded Fluent in Simulink；
(B) interface is realized using M function in Simulink, journal file and User Defined letter is utilized in Fluent
Between number, two softwares the phase in modification Fluent journal files is operated by accessing shared data file and using file I/O
The mode of related parameter reaches the purpose of data transfer,
(C) Simulink is enabled, Fluent initial boundary conditions are exported, by journal file, starts Fluent, to light
Volt water pump internal flow is calculated, and the parameter that calculating is obtained passes to Simulink model, and Simulink calculates next
The rotating speed and boundary condition at moment, Fluent is passed to using User-Defined Functions, and photovoltaic water pump internal flow is entered again
Row is calculated, and is so moved in circles, until completing the time set in Simulink, analog simulation terminates.
Step 6, result of calculation is post-processed.
(A) photovoltaic water pump internal speed distribution situation is obtained using Fluent figure and visualization technique；
(B) change curve of electric current and voltage is obtained from Simulink.
The advantage of the invention is that：
1st, photovoltaic water pump internal flow method for numerical simulation is set up based on Simulink/Fluent collaborative simulations, breached
The limitation of stream CFD computational methods in traditional water pump, result of calculation is more accurate；
2nd, numerical simulation is carried out to its internal flow according to the actual motion condition of photovoltaic water pump, discloses photovoltaic water pump always
Internal flow changing rule under variable parameter operation, finally can provide correct theoretical foundation for the design of photovoltaic water pump；
3rd, important reference frame can be provided for the analysis of photovoltaic water pump operational reliability.
Brief description of the drawings：
Fig. 1 is photovoltaic water pump three dimensional fluid domain；
Fig. 2 is the photovoltaic cell Simulink simulation models of encapsulation；
Fig. 3 is perturbation observation method algorithm flow；
Fig. 4 is photovoltaic water pump controller Simulink simulation models；
Fig. 5 is permagnetic synchronous motor Simulink simulation models；
Fig. 6 is the data transmission principle between Simulink and Fluent；
Fig. 7 is the realization figure of Simulink and Fluent collaborative simulation photovoltaic water pumping systems；
Fig. 8 is the relative velocity distribution map of photovoltaic water pump numerical simulation first stage impeller intermediate cross-section in embodiment；
Fig. 9 is the change curve of electric current and voltage in embodiment.
Embodiment：
In order to which a kind of method for numerical simulation of photovoltaic water pump internal flow of the present invention is better described, this hair is utilized
Bright method is tested calculating in conjunction with the accompanying drawings and embodiments so that technical scheme and beneficial effect are clearer.
The present embodiment is using 7 grades of photovoltaic centrifugal pumps that a specific revolution is 133 as research object, pump design discharge Q=
2.5m3/ h, lift H=18.3m, rotating speed n=2850r/min, impeller and the stator number of blade are all 6.Specific implementation step is as follows：
Step 1, using the softwares of Creo 2.0 the three dimensional fluid model of photovoltaic water pump is modeled, it is contemplated that impeller and lead
Leaf-size class number increase causes grid sum to be incremented by, and the time that calculates increases, therefore the whole flow field model for choosing two-stage (two-speed) pump is studied, fluid
Computational fields contain five parts：Import extension, impeller water body, cavity, stator water body and outlet extending section, to each several part
Fluid calculation domain model is assembled, as shown in Figure 1.Three-dimensional waterbody assembling file is saved as into suffix name stp files, then will
It imports ANSYS-ICEM grid divisions.
Step 2, by the softwares of ANSYS-ICEM 15.0 to fluid computational fields carry out structured grid divide generation computational fields
Discrete form.In order to ensure computational accuracy, it is necessary to which the lift for calculating prediction with steady state values is predicted as criterion and carries out net
Lattice relevance verification, thinks that grid reaches computational accuracy when the front and rear difference of prediction lift twice is less than 1%.By ready-portioned net
Lattice file is imported in Fluent softwares, and the photovoltaic water pump under different size grids is determined under the setting of identical numerical simulation
Often calculate.Wherein steady state values calculate selection standard k- ε models, and pump inlet is set as the mass flow under design conditions
(0.694kg/s), pump discharge is set as free discharge condition (outflow), and impeller is defined as rotating reference frame, and setting turns
Speed is rated speed (2850r/min), and remaining calculating fluid domain is defined as connection between rest frame, subdomain and uses interface
(Mesh Interfaces) carries out data transmission, and wall is assumed without slip boundary condition in calculating.
Step 3, the simulation model for setting up using Matlab/Simulink photovoltaic battery panel, controller, motor, in real time meter
Calculate the rotating speed of photovoltaic water pump：
(1) intensity of illumination and photovoltaic battery panel output voltage U and electric current I relation during temperature change are：
Wherein,
C2=(Um/UOC-1)/ln(1-Im/ISC),
Δ U=- β Δs T-RSΔ I,
Δ T=T-Tref,
T is the temperature of solar cell, DEG C；TrefFor reference temperature value, 25 DEG C；G is the intensity of illumination of the sun, W/m2；
GrefTo refer to intensity of illumination, 1000W/m2；ISCFor for short circuit current flow, ImFor the electric current at maximum power point, A；Respectively, UOCFor
Open-circuit voltage, UmFor the voltage at maximum power point, V；α is current temperature coefficient, A/ DEG C under the conditions of reference light shines；β is reference
Voltage temperature coefficient under illumination condition, V/ DEG C；RSFor the resistance of photovoltaic array, Ω.
The Simulink simulation models of photovoltaic battery panel can be set up based on formula (1), as shown in Figure 2.
(2) maximal power tracing controller algorithm is write according to the course of work of perturbation observation method, sets up Simulink and imitate
True mode, perturbation observation method algorithm flow is as shown in Figure 3.The function of inverter is realized using pulse duration modulation method, and sets up phase
The simulation model answered, as shown in Figure 4.
(3) permagnetic synchronous motor mathematical modeling is expressed as：
Its electromagnetic torque is expressed as：
Wherein, subscript d and q represent (d, q) axis component, ν respectivelydAnd νqFor stator voltage, LdAnd LqFor stator inductance, idWith
iqFor stator electric current, RsIt is the every phase resistance of stator, ψfIt is that, as the rotor flux caused by rotor permanent magnet frame, p represents differential operator,
ωmFor angular speed.
The Simulink simulation models of permagnetic synchronous motor are set up according to the mathematical equation of motor, as shown in Figure 5.
The parameter of each part is as follows when Simulink is emulated：
Photovoltaic battery panel major parameter：(G=1000W/m under reference conditions2, T=25 DEG C) and cell panel open-circuit voltage Voc=
66.8V, short circuit current flow Isc=9.51A, maximum power point voltage Vm=55V, maximum power point electric current Im=18.2A.
Permagnetic synchronous motor major parameter：Rated power Pn=250W, rotating speed n=2850r/min, be often in series resistance Rs
=1.93 Ω, inductance Ld=0.042H, Lq=0.0795H, rotor flux ψf=0.314Wb, rotary inertia Jm=0.003kg/m2,
Viscosity friction coefficient Bm=0.0008Nm/ (rad/s).
Simulation parameter is set：Using discrete method for solving, Ts=5e-5S, derivation algorithm uses ode0.2s, and variable step is asked
Solution.
Step 4, the fluid calculation domain grid file of photovoltaic water pump imported in Fluent softwares, carries out unsteady computation,
The boundary condition and primary condition of solving model are set：Selection standard k- ε models, pump inlet is set as mass flow, its value
The rotating speed that size is exported according to Simulink is calculated by similarity law, and pump discharge is set as free discharge condition
(outflow), impeller is defined as rotating reference frame, and tachometer value is exported by Simulink, and remaining calculates fluid domain and is defined as
Rest frame；Connection is carried out data transmission using interface (Mesh Interfaces) between subdomain, to wall in calculating
Assuming that without slip boundary condition；The impeller and stator of the photovoltaic water pump are plastic material, and calculating basin wall is very smooth, therefore
Wall is assumed without slip boundary condition in calculating.Impeller often rotates 1 degree and once calculated, i.e., impeller revolves in unsteady computation
Circling needs 360 time steps, according to the corresponding time step of speed setting, dynamic ten circle of impeller corotation.
Step 5, using Fluent photovoltaic water pump internal flow is calculated, according to Matlab/ during calculating
Simulink simulation result real-time update rotating speed and boundary condition.Data transmission principle between the two, as shown in Figure 6.Association
Need to carry out data transfer between Simulink and Fluent with emulation, the operating mechanism of two kinds of software is different, and the present invention is adopted
With the mode of embedded Fluent in Simulink.Interface is realized using M function in Simulink, passes through order in M programs
“！Fluent 3dd-i journal " start Fluent and perform corresponding artificial tasks.Pass through daily record in Fluent
(Journal) file and User-Defined Functions (UDF).Pass through accessing shared data file (or shared drive) between two softwares
And operate the mode of the relevant parameter in modification Fluent daily records (Journal) file to reach data transfer using file I/O
Purpose.The realization figure of Simulink and Fluent collaborative simulation photovoltaic water pumps, as shown in Figure 7.
Step 6, result of calculation is post-processed.Obtained using Fluent figure and visualization technique in photovoltaic water pump
Portion's VELOCITY DISTRIBUTION situation, obtains the change curve of electric current and voltage from Simulink.
Claims (7)
1. a kind of method for numerical simulation of photovoltaic water pump internal flow, it is characterised in that comprise the following specific steps that：
(1) 3D sculpting software Creo, UG or Solidworks are used, the three dimensional fluid computational fields of photovoltaic water pump are built
Mould；
(2) by mesh generation software I CEM or Gambit to three dimensional fluid computational fields carry out mesh generation generate computational fields from
The form of dissipating, and carry out grid relevance verification；
(3) simulation model of photovoltaic battery panel, controller, motor is set up using Matlab/Simulink, photovoltaic water is calculated in real time
The rotating speed of pump；
(4) the three dimensional fluid computational fields grid file for the optimal photovoltaic water pump for obtaining step (2) is imported in Fluent softwares,
The boundary condition and primary condition of solving model are set；
(5) photovoltaic water pump internal flow is calculated using Fluent, according in step (3) during calculating
The rotating speed and the boundary condition of solving model of Matlab/Simulink simulation result real-time update photovoltaic water pump；
(6) result of calculation is post-processed, obtains photovoltaic water pump internal speed distribution situation；Photovoltaic array electric current and voltage
Change curve.
2. a kind of method for numerical simulation of photovoltaic water pump internal flow according to claim 1, it is characterised in that：Step
(1) in, using 3D sculpting software Creo, UG or Solidworks, the three dimensional fluid computational fields of photovoltaic water pump are modeled,
Comprise the following steps that：
(A) three dimensional fluid computational fields mainly include following components：Inducer, cavity, impeller water body, diffuser water body and
Outlet section；
(B) the three dimensional fluid calculating domain model of each several part is assembled.
3. a kind of method for numerical simulation of photovoltaic water pump internal flow according to claim 1, it is characterised in that：Step
(2) in, by mesh generation software I CEM or Gambit, three dimensional fluid computational fields are carried out mesh generation generation computational fields from
The form of dissipating, and grid relevance verification is carried out, comprise the following steps that：
(A) fluid calculation domain assembly is imported in mesh generation software I CEM or Gambit, defines the face in fluid calculation domain, and
Divide the discrete form of high-quality mess generation computational fields；
(B) in order to ensure computational accuracy, it is necessary to which the lift for calculating prediction with steady state values is predicted as criterion and carries out grid phase
The checking of closing property, thinks that grid reaches computational accuracy when the front and rear difference of prediction lift twice is less than 1%, is now optimal value；
Wherein, steady state values calculate selection standard k- ε models, and pump inlet is set as the mass flow under design conditions, pump discharge
It is set as free discharge condition, impeller is defined as rotating reference frame, and setting speed is rated speed, remaining calculates fluid domain
Connection between rest frame, subdomain is defined as using interface Mesh Interfaces to carry out data transmission, it is right in calculating
Wall is assumed without slip boundary condition.
4. a kind of method for numerical simulation of photovoltaic water pump internal flow according to claim 1, it is characterised in that：Step
(3) in, the simulation model of photovoltaic battery panel, controller, motor is set up using Matlab/Simulink, photovoltaic water is calculated in real time
The rotating speed of pump, is comprised the following steps that：
(A) intensity of illumination and photovoltaic battery panel output voltage U and electric current I relation during temperature change are：
Wherein,
C2=(Um/UOC-1)/ln(1-Im/ISC),
Δ U=- β Δs T-RSΔ I,
Δ T=T-Tref,
T is the temperature of solar cell, DEG C；TrefFor reference temperature value, 25 DEG C；G is the intensity of illumination of the sun, W/m2；GrefFor ginseng
Examine intensity of illumination, 1000W/m2；ISCFor for short circuit current flow, ImFor the electric current at maximum power point, A；UOCFor open-circuit voltage, UmFor
Voltage at maximum power point, V；α is current temperature coefficient, A/ DEG C under the conditions of reference light shines；β is voltage under the conditions of reference light shines
Temperature coefficient, V/ DEG C；RSFor the resistance of photovoltaic array, Ω；
The Simulink simulation models of photovoltaic battery panel are set up according to formula (1)；
(B) according to MPPT maximum power point tracking algorithm (perturbation observation method, constant voltage process, neural network, fuzzy control etc.)
The course of work write maximal power tracing controller algorithm, set up controller Simulink simulation models；
(C) permagnetic synchronous motor mathematical modeling is expressed as：
Its electromagnetic torque TeIt is expressed as：
Wherein, subscript d and q represent (d, q) axis component, ν respectivelydAnd νqFor stator voltage, LdAnd LqFor stator inductance, idAnd iqFor
Stator electric current, RsIt is the every phase resistance of stator, ψfIt is that, as the rotor flux caused by rotor permanent magnet frame, p represents differential operator, ωmFor
Angular speed；
The Simulink models of motor are set up according to formula (2) and formula (3).
5. a kind of method for numerical simulation of photovoltaic water pump internal flow according to claim 1, it is characterised in that：Step
(4) in, the fluid calculation domain grid file of photovoltaic water pump is imported in Fluent softwares, set solving model boundary condition and
Primary condition, is comprised the following steps that：
(A) the fluid calculation domain grid file for the optimal a set of photovoltaic water pump for obtaining step (2) is imported in Fluent softwares,
Carry out unsteady computation；
(B) boundary condition and primary condition of solving model are set：
Selection standard k- ε models, pump inlet is set as mass flow, and the rotating speed that the size of its value is exported according to Simulink is by phase
Calculated like law, pump discharge is set as free discharge condition, impeller is defined as rotating reference frame, tachometer value by
Simulink is exported, and remaining calculates fluid domain and is defined as rest frame；Connection is using interface Mesh between subdomain
Interfaces carries out data transmission, and is assumed to be non-slip condition in calculating to wall, impeller, which often rotates 1 degree, once to be counted
Calculate, i.e., impeller, which rotates a circle, in unsteady computation needs 360 time steps, according to the corresponding time step of speed setting, impeller
Dynamic ten circle of corotation.
6. a kind of method for numerical simulation of photovoltaic water pump internal flow according to claim 1, it is characterised in that：Step
(5) in, photovoltaic water pump internal flow is calculated using Fluent, according to Matlab/Simulink during calculating
Simulation result real-time update rotating speed and boundary condition, comprise the following steps that：
(A) collaborative simulation needs to carry out data transfer between Simulink and Fluent, and the operating mechanism of two kinds of software is different,
The present invention is by the way of embedded Fluent in Simulink；
(B) interface is realized using M function in Simulink, journal file and User-Defined Functions is utilized in Fluent,
The correlation in modification Fluent journal files is operated to join by accessing shared data file and using file I/O between two softwares
Several modes reaches the purpose of data transfer；
(C) Simulink is enabled, Fluent initial boundary conditions are exported, by journal file, starts Fluent, to photovoltaic water
Pump internal flow is calculated, and the parameter that calculating is obtained passes to Simulink model, and Simulink calculates subsequent time
Rotating speed and boundary condition, pass to Fluent using User-Defined Functions, photovoltaic water pump internal flow counted again
Calculate, so move in circles, until completing the time set in Simulink, analog simulation terminates.
7. a kind of method for numerical simulation of photovoltaic water pump internal flow according to claim 1, it is characterised in that：Step
(6) in, result of calculation is post-processed, comprised the following steps that：
(A) photovoltaic water pump internal speed distribution situation is obtained using Fluent figure and visualization technique；
(B) change curve of electric current and voltage is obtained from Simulink.
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| CN109858094A (en) * | 2018-12-28 | 2019-06-07 | 国家电网有限公司 | The method for numerical simulation of oil water separation process in a kind of substation accident oil sump |
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| CN113268824A (en) * | 2021-04-23 | 2021-08-17 | 上海卫星工程研究所 | Fluid loop numerical simulation method, system and medium based on flow field in temperature control valve |
| CN113312856A (en) * | 2021-05-14 | 2021-08-27 | 湘潭大学 | Numerical calculation combined thermal management control simulation method for battery pack of electric vehicle |
| CN113312856B (en) * | 2021-05-14 | 2022-04-26 | 湘潭大学 | Numerical calculation combined thermal management control simulation method for battery pack of electric vehicle |
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