CN103309727B - A kind of vane pump cavitation numerical simulation automatic operation method based on ANSYS-CFX software - Google Patents
A kind of vane pump cavitation numerical simulation automatic operation method based on ANSYS-CFX software Download PDFInfo
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Abstract
The invention discloses a kind of vane pump cavitation numerical simulation automatic operation method based on ANSYS CFX software.Using ANSYS CFX software design patterns vane pump non-cavitating numerical computations file, including initial modeling and the stress and strain model of flow field regions, boundary condition is arranged, and computation model selects, and the condition of convergence judges.Cavitation numerical value calculation document is set, including adding vapour phase physical property material, sets import two phase component boundary condition, set initial inlet pressure boundary condition, select cavitation model.ANSYS CFX software is used automatically to run the file of the entitled ccl of required suffix.Foundation can realize the autoexec that cavitation numerical simulation is run automatically, double-clicks operation this document and can realize the automatic operation of vane pump cavitation numerical simulation.Present invention can ensure that carrying out continuously and automatically of whole numerical procedure, thus shorten the time that whole numerical procedure expends to the full extent.
Description
Technical field
The present invention relates to a kind of hydraulic machinery cavitation numerical simulation operation method, particularly a kind of soft based on ANSYS-CFX
The vane pump cavitation numerical simulation automatic operation method of part.
Background technology
Vane pump is to involve the interests of the state and the people and the strategy equipment of national security, as important energy conversion device, extensively
General each department being applied to national economy.Cavitation Problems is always the key core problem of vane pump area research, is also many
Planting the key problem of engineering field key technology, almost all of vane pump all can run into Cavitation Problems.Due to cavitation phenomenon
Complexity, numerical computation method is always one of Main Means of cavitation research.At present, many CFD software can realize this
Purpose, wherein ANSYS-CFX is due to the interface of its close friend, powerful before and after process function, stable convergence, calculate accurately
Result and there is many interfaces being connected with other softwares, thus apply relatively broad.But, carrying out vane pump Cavitation Problems
Numerical computations time, need artificial constantly to reduce vane pump inlet pressure binary values, until it reaches required cavitation number.This
Be accomplished by research worker frequently pay close attention to the state that carries out of calculating, and when research worker is gone out or during rest, one of them pressure
Under calculating restrain and stop, now due to cannot revise timely inlet pressure numerical value make calculating enter next step, this will
The time of whole cavitation numerical procedure certainly will be extended, so that being delayed the carrying out of sundry item.Therefore, setting up one can be real
The computational methods that existing vane pump cavitation numerical simulation is run automatically, to realize entering continuously and automatically of whole numerical procedure
OK, the time that whole numerical procedure expends can be shortened greatly, have important practical significance.
Summary of the invention
For problems of the prior art, it is an object of the invention to provide one and can realize pressure boundary numerical value
The vane pump cavitation numerical simulation automatic operation method based on ANSYS-CFX software of automatically amendment.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of vane pump based on ANSYS-CFX software
Cavitation numerical simulation automatic operation method, step includes:
1) use 3D sculpting software to carry out the initial modeling of flow field regions, use stress and strain model software to carry out grid and draw
Point, grid file is imported selection Steady computation schema in ANSYS-CFX, sets liquid phase physical property material water at 25C,
Pressure inlets, mass flow export boundary condition are set, set initial inlet pressure boundary condition 100000Pa, choose turbulence meter
Calculating model k-ε, arrange condition of convergence 1e-4, output suffix is the non-cavitating numerical computations file of def；
2) on above-mentioned non-cavitating numerical computations file, add vapour phase physical property material water vapor at 25C, will enter
The boundary condition of oral fluid phase component is set to 1, and the boundary condition of vapor-phase composition is set to 0, selects the cavitation mould of ANSYS-CFX software
Type, the cavitation numerical value calculation document of the output entitled def of suffix, the suffix of all settings is comprised by the output of ANSYS-CFX software
The file of entitled ccl；
3) final required cavitation number σ is determined, by formula σ=(Pin -Pv)/0.5ρl u2 2Calculate corresponding import
Force value, wherein PinRepresent inlet pressure, for the numerical value of required calculating, PvRepresent saturated vapour pressure, ρlRepresent that fluid is close
Degree, u2Representing impeller circumferential speed, research worker determines that vane pump cavitation numerical value design condition is counted out n, P1=100000Pa, Pn
=Pin, make 1≤m≤n-1, open the ccl file of the m time operating point output, will wherein represent vane pump inlet pressure perimeter strip
The pressure value P of partmIt is revised as the pressure value P needed for the m+1 time operating point numerical computationsm+1, and separately deposit this ccl file, build successively
Remaining ccl file vertical, until Pn=Pin, a newly-built file, above-mentioned file is all placed in this document folder；
4) a newly-built text document under above-mentioned file, writes the peace of ANSYS-CFX software in text document
Dress path, write runs the order of numerical computations file, it is intended that the numerical computations file path of the entitled def of suffix, and write changes
The order of inlet pressure boundary condition, it is intended that the file path of the entitled ccl of suffix, will calculate under a upper inlet pressure conditions
The destination file generated after one-tenth uses kernel as initial fields when calculating under next inlet pressure conditions, write parallel computation
The order of quantity；
5) preserve this auto.txt text document, and the suffix name name of text document is revised as bat, double-click and run
Auto.bat file, computer carries out vane pump cavitation numerical computations by automatically calling ANSYS-CFX software, first from non-cavitating
Numerical computations proceeds by, and after this calculating process terminates and generates destination file, ANSYS-CFX software will perform next automatically
The order of row so that calculate and can be carried out continuously, finally gives the cavitation numerical computations of vane pump under the conditions of each inlet boundary
Result.
After using above-mentioned technical scheme, the method have the advantages that and 1. can thoroughly replace research worker to enter
Row calculates the work of amendment inlet pressure boundary condition every time, makes research worker can carry out other work or rest relievedly；
2. can avoid completely being caused when cannot be introduced into next calculation process owing to adjusting inlet pressure boundary condition the most in time
The loss of time；3. can ensure that carrying out continuously and automatically of whole numerical procedure, thus shorten whole number to the full extent
The time that value calculating process expends.
Accompanying drawing explanation
Fig. 1 is the stream of a kind of vane pump cavitation numerical simulation automatic operation method based on ANSYS-CFX software of the present invention
Cheng Tu；
Fig. 2 is centrifugal pump flow field regions three-dimensional modeling figure in the embodiment of the present invention；
Fig. 3 is centrifugal pump flow field regions Structure Network trrellis diagram in the embodiment of the present invention.
Detailed description of the invention
Below according to Figure of description and specific embodiment, the present invention is further explained.
As it is shown in figure 1, a kind of vane pump cavitation numerical simulation automatic operation method based on ANSYS-CFX software, step
Including:
1) use 3D sculpting software to carry out the initial modeling of flow field regions, use stress and strain model software to carry out grid and draw
Point, grid file is imported selection Steady computation schema in ANSYS-CFX, sets liquid phase physical property material water at 25C,
Pressure inlets, mass flow export boundary condition are set, set initial inlet pressure boundary condition 100000Pa, choose turbulence meter
Calculating model k-ε, arrange condition of convergence 1e-4, output suffix is the non-cavitating numerical computations file of def；
2) on above-mentioned non-cavitating numerical computations file, add vapour phase physical property material water vapor at 25C, will enter
The boundary condition of oral fluid phase component is set to 1, and the boundary condition of vapor-phase composition is set to 0, selects the cavitation mould of ANSYS-CFX software
Type, the cavitation numerical value calculation document of the output entitled def of suffix, the suffix of all settings is comprised by the output of ANSYS-CFX software
The file of entitled ccl；
3) final required cavitation number σ is determined, by formula σ=(Pin -Pv)/0.5ρl u2 2Calculate corresponding import
Force value, wherein PinRepresent inlet pressure, for the numerical value of required calculating, PvRepresent saturated vapour pressure, ρlRepresent that fluid is close
Degree, u2Representing impeller circumferential speed, research worker determines that vane pump cavitation numerical value design condition is counted out n, P1=100000Pa, Pn
=Pin, make 1≤m≤n-1, open the ccl file of the m time operating point output, will wherein represent vane pump inlet pressure perimeter strip
The pressure value P of partmIt is revised as the pressure value P needed for the m+1 time operating point numerical computationsm+1, and separately deposit this ccl file, build successively
Remaining ccl file vertical, until Pn=Pin, a newly-built file, above-mentioned file is all placed in this document folder；
4) a newly-built text document under above-mentioned file, writes the peace of ANSYS-CFX software in text document
Dress path, write runs the order of numerical computations file, it is intended that the numerical computations file path of the entitled def of suffix, and write changes
The order of inlet pressure boundary condition, it is intended that the file path of the entitled ccl of suffix, will calculate under a upper inlet pressure conditions
The destination file generated after one-tenth uses kernel as initial fields when calculating under next inlet pressure conditions, write parallel computation
The order of quantity；
5) preserve this auto.txt text document, and the suffix name of text document is revised as bat, double-click and run
Auto.bat file, computer carries out vane pump cavitation numerical computations by automatically calling ANSYS-CFX software, first from non-cavitating
Numerical computations proceeds by, and after this calculating process terminates and generates destination file, ANSYS-CFX software will perform next automatically
The order of row so that calculate and can be carried out continuously, finally gives the cavitation numerical computations of vane pump under the conditions of each inlet boundary
Result.
Embodiment:
Centrifugal pump is the one of vane pump, and a kind of centrifugal pump cavitation numerical simulation based on ANSYS-CFX software is transported automatically
Row method, step includes:
(1) ANSYS-CFX software design patterns centrifugal pump non-cavitating numerical computations file is used.Use Pro/E to centrifugal pump stream
Field areas carries out three-dimensional modeling, including importing and exporting extension, and impeller and spiral case, as shown in Figure 2；Use stress and strain model software convection current
Field areas carries out stress and strain model, as shown in Figure 3；Grid file is imported ANSYS-CFX and selects Steady computation schema；Set liquid
Phase physical property material water at 25C；Using pressure inlets, mass flow export boundary condition, inlet pressure is set to
100000Pa；Select turbulent flow computation model k-ε；Condition of convergence 1e-4 is set；Output calculation document pump.def.
(2) ANSYS-CFX software design patterns centrifugal pump cavitation numerical value calculation document is used.Based on previous step pump.def literary composition
Part, adds vapour phase physical property material water vapor at 25C；Setting import two phase component boundary condition, liquid phase component is set to 1,
Vapor-phase composition is set to 0；Set initial inlet pressure boundary condition 100000Pa；Select the cavitation mould that ANSYS-CFX software carries
Type；Output calculation document pump_cav.def；Output comprises the cav.ccl file of all settings.
(3) use ANSYS-CFX software to set up centrifugal pump cavitation numerical computations and automatically run the entitled ccl's of required suffix
File.Determine final required cavitation number σ, and by formula σ=(Pin -Pv)/0.5ρl u2 2Calculate corresponding inlet-pressure
Force value is 8000Pa；Determining that cavitation numerical value design condition is counted is 7；Open the cav.ccl file of previous step output, find table
Show the force value of inlet pressure boundary condition, be revised as force value 70000Pa needed for next step numerical computations, and separately deposit
This document is 70000.ccl.The like, set up remaining ccl file: 40000.ccl, 20000.ccl, 16000.ccl,
12000.ccl, 10000.ccl and 8000.ccl.At D packing catalogue new folder named pump, by complete for above-mentioned file
Portion is placed in this document folder.
(4) foundation can realize the autoexec that cavitation numerical simulation is run automatically.
1. a newly-built text document under pump file, and named auto.txt.
2. the installation path of ANSYS-CFX software is specified.
Write ANSYS-CFX software path in auto.txt text document the first row:
PATH c:\Program Files\ANSYS Inc\v121\CFX\bin\
3. write centrifugal pump non-cavitating numerical computations performs order.
Enter as ordered in auto.txt text document the second row write:
start/wait cfx5solve.exe -def "D:\pump\pump.def" -par-local -
partition 10
This order represents execution centrifugal pump non-cavitating numerical computations, will automatically generate destination file pump_ after calculating convergence
001.res。
Wherein, start/wait cfx5solve.exe represents startup software ANSYS-CFX；
-def " D: pump pump.def " represents the path of centrifugal pump non-cavitating numerical computations file；
-par-local-partition 10 represents that 10 kernels using computer calculate.
4. write centrifugal pump cavitation numerical computations performs order.
In the write of auto.txt text document the third line as ordered:
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ini "D:\pump\
pump_001.res" -par-local -partition 10
This order represents execution centrifugal pump cavitation numerical procedure, and using non-cavitating numerical result as initial fields
Calculate, after calculating convergence, destination file pump_cav_001.res will be automatically generated.Wherein ,-ini " D: pump
Pump_001.res " represents and uses non-cavitating numerical result to calculate as cavitation numerical computations initial fields.
5. write changes the order of centrifugal pump inlet pressure boundary condition.
Write is played as ordered in auto.txt text document fourth line:
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
70000.ccl" -ini "D:\pump\pump_cav_001.res" -par-local -partition 10
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
40000.ccl" -ini "D:\pump\pump_cav_002.ees" -par-local -partition 10
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
20000.ccl" -ini "D:\pump\pump_cav_003.res" -par-local -partition 10
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
16000.ccl" -ini "D:\pump\pump_cav_004.res" -par-local -partition 10
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
12000.ccl" -ini "D:\pump\pump_cav_005.res" -par-local -partition 10
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
10000.ccl" -ini "D:\pump\pump_cav_006.res" -par-local -partition 10
start/wait cfx5solve.exe -def "D:\pump\pump_cav.def" -ccl "D:\pump\
8000.ccl" -ini "D:\pump\pump_cav_007.res" -par-local -partition 10
This group command realizes automatically reducing the function of centrifugal pump inlet pressure boundary condition, and with previous inlet pressure
Result of calculation calculate as initial fields.Wherein ,-ccl " D: pump 70000.ccl " represents the import of centrifugal pump
Force value is revised as 70000Pa.
(5) run autoexec and realize the automatic operation of centrifugal pump cavitation numerical computations.
Preserve this auto.txt text document, and text document suffix name is revised as auto.bat, double-click to run and be somebody's turn to do
File.Computer is centrifuged pump cavitation numerical computations by automatically calling ANSYS-CFX software, and whole calculating process will be from without empty
Changing numerical computations to proceed by, after this calculating process terminates and generates destination file, software will perform the life of next line automatically
Order so that calculate and can be carried out continuously, it is not necessary to artificially adjust, until all calculating completes.Finally give each inlet boundary bar
The cavitation numerical result of centrifugal pump under part.
Claims (1)
1. a vane pump cavitation numerical simulation automatic operation method based on ANSYS-CFX software, it is characterised in that step bag
Include:
1) use 3D sculpting software to carry out the initial modeling of flow field regions, use stress and strain model software to carry out stress and strain model, will
Grid file imports and selects Steady computation schema in ANSYS-CFX, sets liquid phase physical property material water at 25C, arranges pressure
Power import, mass flow export boundary condition, set initial inlet pressure boundary condition 100000Pa, choose turbulent flow computation model
K-ε, arranges condition of convergence 1e-4, and output suffix is the non-cavitating numerical computations file of def；
2) on above-mentioned non-cavitating numerical computations file, vapour phase physical property material water vapor at 25C is added, by import liquid
The boundary condition of phase component is set to 1, and the boundary condition of vapor-phase composition is set to 0, selects the cavitation model of ANSYS-CFX software,
The cavitation numerical value calculation document of the output entitled def of suffix, the suffix being comprised all settings by the output of ANSYS-CFX software is entitled
The file of ccl；
3) final required cavitation number σ is determined, by formula σ=(Pin -Pv)/0.5ρl u2 2Calculate corresponding inlet pressure
Value, wherein PinRepresent inlet pressure, for the numerical value of required calculating, PvRepresent saturated vapour pressure, ρlRepresent fluid density, u2
Representing impeller circumferential speed, research worker determines that vane pump cavitation numerical value design condition is counted out n, P1=100000Pa, Pn=Pin
, make 1≤m≤n-1, open the ccl file of the m time operating point output, will wherein represent vane pump inlet pressure boundary condition
Pressure value PmIt is revised as the pressure value P needed for the m+1 time operating point numerical computationsm+1, and separately deposit this ccl file, set up it successively
Remaining ccl file, until Pn=Pin, a newly-built file, above-mentioned file is all placed in this document folder；
4) a newly-built text document under above-mentioned file, writes the installation road of ANSYS-CFX software in text document
Footpath, write runs the order of numerical computations file, it is intended that the numerical computations file path of the entitled def of suffix, and write changes import
The order of pressure boundary condition, it is intended that the file path of the entitled ccl of suffix, after having calculated under a upper inlet pressure conditions
The destination file generated uses number of cores as initial fields when calculating under next inlet pressure conditions, write parallel computation
Order；
5) preserve this auto.txt text document, and the suffix name of text document is revised as bat, double-click and run auto.bat
File, computer carries out vane pump cavitation numerical computations by automatically calling ANSYS-CFX software, first from non-cavitating numerical computations
Proceeding by, after this calculating process terminates and generates destination file, ANSYS-CFX software will perform the life of next line automatically
Order so that calculate and can be carried out continuously, finally gives the cavitation numerical result of vane pump under the conditions of each inlet boundary.
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| CN104573241B (en) * | 2015-01-14 | 2017-11-17 | 北京理工大学 | A kind of method for numerical simulation of the aviation kerosine cavitations of RP 3 |
| CN105114336B (en) * | 2015-08-07 | 2016-08-17 | 扬州大学 | Large-scale low-lift pump device cavitation performance projectional technique |
| CN107301291A (en) * | 2017-06-21 | 2017-10-27 | 河北工业大学 | A kind of electromagnetic field based on esr process, temperature field and field of flow coupling finite element method |
| CN109214136A (en) * | 2018-11-12 | 2019-01-15 | 扬州大学 | A kind of axial-flow pump impeller blade tip clearance cavitation Numerical Predicting Method |
| CN111400941A (en) * | 2019-01-03 | 2020-07-10 | 江苏大学 | Numerical prediction method for internal reflux and reflux vortex cavitation of vane pump |
| CN110096812B (en) * | 2019-05-05 | 2021-09-07 | 湖南凯利特泵业有限公司 | Centrifugal pump cavitation performance automatic simulation method based on CFD platform |
| CN111797580B (en) * | 2020-07-21 | 2022-09-09 | 中国航发湖南动力机械研究所 | CFX software-based three-dimensional CFD automatic calculation method for turbine characteristics |
| CN114021278A (en) * | 2021-11-05 | 2022-02-08 | 江苏大学 | Full-automatic internal flow analysis method for hydraulic mechanical transition process |
| CN117216822B (en) * | 2023-08-30 | 2024-06-04 | 长江水利委员会长江科学院 | Method and system for batch processing of unsaturated zone water salt migration numerical simulation |
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