CN107491574A - A kind of method and device of vehicle motor air intake duct simulation calculation - Google Patents
A kind of method and device of vehicle motor air intake duct simulation calculation Download PDFInfo
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- CN107491574A CN107491574A CN201610952572.9A CN201610952572A CN107491574A CN 107491574 A CN107491574 A CN 107491574A CN 201610952572 A CN201610952572 A CN 201610952572A CN 107491574 A CN107491574 A CN 107491574A
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- air intake
- intake duct
- simulation model
- test point
- inlet valve
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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
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The invention discloses a kind of method and device of vehicle motor air intake duct simulation calculation, this method includes：The inlet valve lift test point of the air intake duct of vehicle motor is determined, and determines air intake duct simulation model corresponding to each inlet valve lift test point；Gridding is carried out to air intake duct simulation model corresponding to each inlet valve lift test point；Computational fields boundary condition corresponding to each air intake duct simulation model after gridding is set, and is set using Hydrodynamics Theory and calculates solver；According to each air intake duct simulation model after computational fields boundary condition and gridding, using solver is calculated carry out that simulation result corresponding to each inlet valve lift test point is calculated；This method calculating is simple to operate, and the cycle is short, and cost is low, and computational accuracy is high, and computation model is built more flexibly, and available for the contrast optimization between multiple air intake duct schemes, according to the scheme that result selection inlet characteristic is optimal, can be designed with assisted engine.
Description
Technical field
The present invention relates to Vehicle Engineering technical field, more particularly to a kind of method of vehicle motor air intake duct simulation calculation
And device.
Background technology
At this stage, energy shortage receives extensive attention in the world with environmental pollution.In Vehicle Industry, constitutional law
Rule are also increasingly stricter to the requirement of vehicle discharge and oil consumption, and therefore, vehicle company all employs one in terms of engine application
Serial new technology meets these requirements, such as use in-cylinder direct-jet and supercharging technology simultaneously on gasoline engine, lifting engine
And can reduction oil consumption and discharge while power, but the realization of this technology, and higher want is proposed to engine design
Ask.
The structure design of air intake duct directly influences the air inflow and In Cylinder Flow of engine, rational to organize in cylinder
Air motion has material impact to the fuel oil mixing and burning process of direct spray petrol engine in cylinder, and then has influence on engine power
Property, economy and emission performance.Therefore in engine design, the importance that assessment is made to inlet characteristic is also more and more prominent
Go out.
Inlet characteristic parameter mainly includes the discharge coefficient and tumble flow/strength of vortex two values of air flue.It is existing to hair
It is air flue test method that motivation air port performance, which carries out assessing Main Means, and it is corresponding to test out each valve stroke by bench test
Air flue discharge coefficient and tumble flow/strength of vortex, but the test period is longer, and cost is high, and a variety of air flues for designing
Scheme, the exploitativeness of test method are poor, it is not easy to realize.Therefore, vehicle motor inlet characteristic test effect how is improved
Rate, and testing cost is reduced, it is those skilled in the art's technical issues that need to address.
The content of the invention
It is an object of the invention to provide a kind of method and device of vehicle motor air intake duct simulation calculation, calculates operation letter
Single, the cycle is short, and cost is low, and computational accuracy is high, and computation model is built more flexibly, and available between multiple air intake duct schemes
Contrast optimization, the optimal scheme of inlet characteristic is selected according to result, can be designed with assisted engine.
In order to solve the above technical problems, the present invention provides a kind of method of vehicle motor air intake duct simulation calculation, including：
The inlet valve lift test point of the air intake duct of vehicle motor is determined, and determines each inlet valve lift test point
Corresponding air intake duct simulation model；
Gridding is carried out to air intake duct simulation model corresponding to each inlet valve lift test point；
Computational fields boundary condition corresponding to each air intake duct simulation model after gridding is set, and utilizes Hydrodynamics Theory
Set and calculate solver；
According to each air intake duct simulation model after the computational fields boundary condition and gridding, the calculating solver is utilized
Carry out that simulation result corresponding to each inlet valve lift test point is calculated.
Optionally, air intake duct simulation model corresponding to each inlet valve lift test point is determined, including：
Establish the air intake duct simulation model of the vehicle motor；
Inlet valve lift parameter in the air intake duct simulation model is set according to each inlet valve lift test point, really
Air intake duct simulation model corresponding to fixed each inlet valve lift test point.
Optionally, after determining air intake duct simulation model corresponding to each inlet valve lift test point, in addition to：
Digital-to-analogue detection is carried out to air intake duct simulation model corresponding to each inlet valve lift test point, and judges that digital-to-analogue is examined
Survey whether result meets quality requirement；
If not satisfied, then the air intake duct simulation model for being unsatisfactory for quality requirement is modified until corresponding air intake duct is imitated
True mode meets quality requirement.
Optionally, after carrying out gridding to air intake duct simulation model corresponding to each inlet valve lift test point, also
Including：
Grid detection is carried out to the mesh quality of each air intake duct simulation model after gridding, and judges grid detection result
Whether quality requirement is met；
If not satisfied, then the grid of the air intake duct simulation model to being unsatisfactory for quality requirement refined until it is corresponding enter
The grid of air flue simulation model meets quality requirement.
Optionally, the entrance in the computational fields boundary condition and the pressure differential range of outlet are 2500Pa~6500Pa.
Optionally, be calculated emulation corresponding to each inlet valve lift test point using the calculating solver
As a result, including：
Calculated using the calculating solver, and judge to calculate and whether restrain；
If convergence, using result of calculation as simulation result corresponding to corresponding inlet valve lift test point；
If not restraining, the grid of the air intake duct simulation model of inlet valve lift test point and/or modification corresponding to modification
The computational fields boundary condition of the air intake duct simulation model of corresponding inlet valve lift test point is restrained until calculating.
Optionally, the simulation result includes：
Discharge coefficient and vortex/Tumble intensity numerical value and/or air flue and cylinder interior gas VELOCITY DISTRIBUTION and streamline.
Optionally, before carrying out gridding to air intake duct simulation model corresponding to each inlet valve lift test point, also
Including：
The air intake duct simulation model is checked with test model, judges check result whether in predictive error；
If not existing, corresponding air intake duct simulation model is modified until the check of corresponding air intake duct simulation model
As a result in predictive error.
The present invention also provides a kind of device of vehicle motor air intake duct simulation calculation, including：
Model building module, the inlet valve lift test point of the air intake duct for determining vehicle motor, and determine each institute
State air intake duct simulation model corresponding to inlet valve lift test point；
Gridding module, for carrying out grid to air intake duct simulation model corresponding to each inlet valve lift test point
Change；
Condition setting module, for setting computational fields boundary condition corresponding to each air intake duct simulation model after gridding,
And set using Hydrodynamics Theory and calculate solver；
Simulation algorithm model, for according to each air intake duct simulation model after the computational fields boundary condition and gridding,
Using the calculating solver carry out that simulation result corresponding to each inlet valve lift test point is calculated.
Optionally, the simulation result includes：
Discharge coefficient and vortex/Tumble intensity numerical value and/or air flue and cylinder interior gas VELOCITY DISTRIBUTION and streamline.
A kind of method of vehicle motor air intake duct simulation calculation provided by the present invention, including：Determine vehicle motor
Air intake duct inlet valve lift test point, and determine air intake duct simulation model corresponding to each inlet valve lift test point；To each
Air intake duct simulation model corresponding to inlet valve lift test point carries out gridding；Each air intake duct simulation model after gridding is set
Corresponding computational fields boundary condition, and set using Hydrodynamics Theory and calculate solver；According to computational fields boundary condition and net
Each air intake duct simulation model after formatting, using calculate solver be calculated corresponding to each inlet valve lift test point imitate
True result；
It can be seen that this method carries out simulation calculation using the simulation model built, it is not necessary to utilizes cost engine model；Cause
This calculating is simple to operate, and the cycle is short, and cost is low, and computational accuracy is high, and computation model is built more flexibly, is further useful for more
The simulation result that contrast optimization between individual air intake duct scheme is obtained multiple air intake ducts using the above method is carried out to score
Analysis, and the optimal scheme of inlet characteristic is selected according to analysis result, it can also be set according to comparing result complex optimum engine
Meter, promotes the research and development of engine.The present invention also provides a kind of device of vehicle motor air intake duct simulation calculation, has with above-mentioned
Beneficial effect, will not be repeated here.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
A kind of flow chart of the method for vehicle motor air intake duct simulation calculation that Fig. 1 is provided by the embodiment of the present invention；
The air flue and cylinder interior gas VELOCITY DISTRIBUTION schematic diagram that Fig. 2 is provided by the embodiment of the present invention；
The air flue and cylinder interior gas streamline schematic diagram that Fig. 3 is provided by the embodiment of the present invention；
The flow signal of the method for another vehicle motor air intake duct simulation calculation that Fig. 4 is provided by the embodiment of the present invention
Figure；
A kind of structural frames of the device for vehicle motor air intake duct simulation calculation that Fig. 5 is provided by the embodiment of the present invention
Figure.
Embodiment
The core of the present invention is to provide a kind of method and device of vehicle motor air intake duct simulation calculation, calculates operation letter
Single, the cycle is short, and cost is low, and computational accuracy is high, and computation model is built more flexibly, and available between multiple air intake duct schemes
Contrast optimization, the optimal scheme of inlet characteristic is selected according to result, can be designed with assisted engine.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
It refer to Fig. 1, a kind of method for vehicle motor air intake duct simulation calculation that Fig. 1 is provided by the embodiment of the present invention
Flow chart；This method can include：
S100, determine vehicle motor air intake duct inlet valve lift test point, and determine each inlet valve lift
Air intake duct simulation model corresponding to test point；
Specifically, the step is primarily to obtain air intake duct simulation model corresponding to each inlet valve lift test point；Its
In, the selection of inlet valve lift test point is according to the size of vehicle motor inlet valve lift (i.e. according to the big of engine displacement
It is small) specifically determine.It is selected under same selection rule for the big inlet valve of vehicle motor inlet valve lift under normal circumstances
Inlet valve lift test point be more than vehicle motor inlet valve lift small inlet valve.Such as when the fixed integral point lift of selection
Position is as inlet valve lift test point, i.e., respectively with 1mm, 2mm ... calculate arrive corresponding engine maximum valve liter always
Journey.Generally inlet valve lift selecting test point is 1mm, 2mm, 3mm ..., 9mm, 10mm.The present embodiment is not to specific
Vehicle motor air intake duct inlet valve lift test point selection mode and quantity be defined.
It is determined that vehicle motor air intake duct inlet valve lift test point after, it is necessary to obtain the test of each inlet valve lift
Air intake duct simulation model (can be understood as air intake duct geometrical model) corresponding to point, so as to subsequently respectively to each inlet valve lift
Air intake duct geometrical model calculated.The present embodiment does not limit the instrument for establishing air intake duct simulation model.Further, in order to
More accurately air intake duct is modeled, ensures the accuracy calculated, the present embodiment can establish 3D air intake duct simulation models.
Because each inlet valve lift test point has a corresponding air intake duct simulation model.Even there are 10 air inlets
Door lift test point, then be corresponding with 10 air intake duct simulation models.The air intake duct emulation mould of vehicle motor can be initially set up
Type；Inlet valve lift parameter in the air intake duct simulation model is set according to each inlet valve lift test point, determines each air inlet
Air intake duct simulation model corresponding to door lift test point.Such as inlet valve lift parameter value in air intake duct simulation model can be changed
Obtain air intake duct simulation model corresponding to each inlet valve lift test point (i.e. each inlet valve lift parameter value).Can also be
Air intake duct simulation parameters corresponding to each inlet valve lift test point are obtained, then the ginseng using modeling tool according to acquisition
Number, the air intake duct simulation model of each inlet valve lift test point is established respectively.I.e. the present embodiment not pair does not determine each inlet valve liter
The process of air intake duct simulation model is defined corresponding to journey test point.
Further for ensure calculate solver result of calculation and result of the test uniformity, air intake duct simulation model be into
The arrangement of air flue computational fields geometrical model and steady flow testbed of air passage should be consistent, and air intake duct simulation model can include air inlet
Road, inlet valve, valve retainer, combustion chamber top surface, several parts of simulation cylinder sleeve and entrance pressurizer tank etc., each part mentioned above is assembled into
Assembly, extraction assembly inner surface composition closed computation domain.
Because the accuracy of air intake duct simulation model directly affects the accuracy of simulation result.Therefore, in order to further
Ensure the accuracy of simulation result, the present embodiment can carry out quality testing to the air intake duct simulation model established.This implementation
Example is not defined to specific quality determining method, such as can be that almost T-stable itself is examined to air intake duct simulation model
Survey or air intake duct simulation model is checked etc. using test model.It is i.e. preferable, to each inlet valve lift
Air intake duct simulation model corresponding to test point carries out digital-to-analogue detection, and judges whether digital-to-analogue testing result meets quality requirement；If
Meet, then subsequent treatment directly is carried out to the air intake duct simulation model；If not satisfied, then to being unsatisfactory for the air intake duct of quality requirement
Simulation model is modified and carries out digital-to-analogue detection to amended air intake duct simulation model, and whether judges digital-to-analogue testing result
Meet quality requirement, change line number mould detection of going forward side by side again if being unsatisfactory for until corresponding air intake duct simulation model meets quality
Continue operation after it is required that after execution.Meet that quality requirement meets that follow-up calculate requires.
Said process is mainly detected by digital-to-analogue and carries out preliminary quality detection to air intake duct simulation model.Examination can also be utilized
Test model to check air intake duct simulation model, be further ensured that model quality and then ensure the true and reliable of simulation result.
It is i.e. optional, the air intake duct simulation model is checked with test model, judges check result whether in predictive error；
If not existing, corresponding air intake duct simulation model is modified until the check result of corresponding air intake duct simulation model is pre-
Determine in error.Here predictive error is set by user according to experiment the required accuracy, for example, can be error 5% with
It is interior, it is ensured that simulation result coincide preferable with result of the test.
S110, gridding is carried out to air intake duct simulation model corresponding to each inlet valve lift test point；
Specifically, the step be mainly the air intake duct simulation model of each inlet valve lift test point is carried out gridding namely
Grid discretization is carried out to air intake duct geometrical model.The detailed process of gridding can be：Computation software enters to computational fields
Row mesh generation.Wherein, calculate grid and typically require hexahedral mesh, but due to the computational fields shape of air intake duct simulation model
It is more complicated, therefore allow a small amount of tetrahedron or pentahedron be present.
Subsequent simulation calculating speed and precision are directly influenced further as mesh quality, therefore the present embodiment is in order to true
Protect mesh quality to meet to require, mesh quality can be checked, it is undesirable to mesh quality, then need again to net
Lattice are divided.It is i.e. preferable, grid detection is carried out to the mesh quality of each air intake duct simulation model after gridding, and judge
Whether grid detection result meets quality requirement；If not satisfied, then to the net for the air intake duct simulation model for being unsatisfactory for quality requirement
Lattice are refined until the grid of corresponding air intake duct simulation model meets quality requirement.The present embodiment is not to specific grid
Quality testing mode is defined.
Computational fields boundary condition corresponding to each air intake duct simulation model after S120, setting gridding, and utilize fluid force
Theory, which is set, calculates solver；
Specifically, because each inlet valve lift test point has corresponding air intake duct simulation model, thus need exist for for
Computational fields boundary condition corresponding to the setting of each air intake duct simulation model.Set up and calculated corresponding to each air intake duct simulation model
After the boundary condition of domain, it is also necessary to it is configured to calculating solver, wherein, calculating solver is carried out according to Hydrodynamics Theory
Set.Here the setting of computational fields boundary condition and calculating solver is required for being carried out according to specific simulation model.Meter
The setting for calculating domain boundary condition is consistent with experiment, and entrance is arranged to pressure differential with outlet.Entrance is stagnation pressure, is exported to be quiet
Pressure.Preferably, the entrance in computational fields boundary condition here and the pressure differential range of outlet are 2500Pa~6500Pa.Small enters
Pressure differential range corresponding to valve stroke test point is big, such as inlet valve lift selecting test point is 1mm, 2mm, 3mm ..., 9mm,
10mm.Then pressure difference corresponding to 10mm is 2500Pa, and pressure difference corresponding to 1mm is 6500Pa.Above-mentioned numerical value is only for example, the present embodiment
Concrete numerical value is not defined.
S130, according to each air intake duct simulation model after the computational fields boundary condition and gridding, utilize the calculating
Solver carries out that simulation result corresponding to each inlet valve lift test point is calculated.
It can obtain specifically, calculating solver and be calculated simulation result corresponding to each inlet valve lift test point
It is to export the evaluating of description air port performance to assess inlet characteristic parameter, and can utilize inlet characteristic parameter to air flue
Performance is assessed.Here simulation result can include：The discharge coefficient and vortex/tumble flow of each inlet valve lift test point
Strength values and/or air flue and cylinder interior gas VELOCITY DISTRIBUTION and streamline.Pass through the discharge coefficient and vortex/Tumble intensity of output
Numerical value is evaluated inlet characteristic, passes through the air flue and cylinder interior gas VELOCITY DISTRIBUTION (refer to Fig. 2) and streamline of output
(refer to Fig. 3) can visualize the gas motion in air flue and cylinder, make gas motion rail of the technical staff according to image
The shortcomings that mark analysis is to Design of Inlet and optimization direction.
Need whether to restrain the calculating process of simulation result further for the credibility for ensureing simulation result and sentence
It is fixed, corresponding simulation result in the case of convergence can be used as final result to the greatest extent.It is i.e. optional, solved using described calculate
Whether device is calculated, and judge to calculate and restrain；It is if convergence, result of calculation is corresponding as corresponding inlet valve lift test point
Simulation result；If not restraining, modification corresponding to inlet valve lift test point air intake duct simulation model grid and/or repair
The computational fields boundary condition of the air intake duct simulation model of inlet valve lift test point is restrained until calculating corresponding to changing.That is application stream
Mechanics theoretical installation calculates solver and calculated.It is required that after calculating convergence, result of calculation can use, and not received if calculated
Hold back, then need to reexamine model and boundary condition, recalculate.During recalculating can first to it is corresponding enter
The grid of air flue simulation model is further refined, and is re-starting simulation calculation, can also be to calculating if not restraining still
Domain boundary condition is modified.Or in the case of appearance is not convergent, grid and meter directly to air intake duct simulation model
Calculate domain boundary condition to modify, can so improve computational efficiency, reduce and repeat modification number.
Fig. 4 is refer to, citing gives a kind of schematic flow sheet of the method for vehicle motor air intake duct simulation calculation.
The process (i.e. air intake duct simulation calculation process) that calculating solver in the embodiment calculates is mainly based upon fluid
Dynamic method application finite volume method is analyzed air intake duct simulation model, and air flue flow can be not only drawn by calculating
The numerical value of coefficient and tumble flow/strength of vortex, while velocity field cloud charts in air flue and cylinder can also be obtained, i.e., by air flue and gas
Gas motion visualization in cylinder, and Design of Inlet is optimized by interpretation of result and carries out theoretical direction.Effectively make up
The defects of in the prior art experiment using air flue test method.
Further, due to the air intake duct simulation model, to build more flexible calculating process simple, thus suitable for it is multiple enter
Contrast optimization between air flue scheme, i.e., the simulation result of multiple air intake duct simulation models is analyzed, can basis
The optimal scheme of analysis result selection inlet characteristic, assisted engine design, every kind of hair can also be selected according to analysis result
The advantages of under motivation Design of Inlet, carries out the fusion of various designs, obtains more excellent engine inlets design.
The efficiency of research and development of engine inlets design can also further be lifted.
Based on above-mentioned technical proposal, the method for vehicle motor air intake duct simulation calculation provided in an embodiment of the present invention, meter
Simple to operate, the cycle is short, and cost is low, and computational accuracy is high, and computation model is built more flexibly, suitable for multiple air intake duct sides
Contrast optimization between case, the optimal scheme of inlet characteristic is selected according to result of calculation, can also be integrated according to comparing result
Optimize engine design, promote the research and development of engine.
The device of vehicle motor air intake duct simulation calculation provided in an embodiment of the present invention is introduced below, hereafter retouched
The device for the vehicle motor air intake duct simulation calculation stated and the method for above-described vehicle motor air intake duct simulation calculation
Can be mutually to should refer to.
It refer to Fig. 5, a kind of device for vehicle motor air intake duct simulation calculation that Fig. 5 is provided by the embodiment of the present invention
Structured flowchart；The device can include：
Model building module 100, the inlet valve lift test point of the air intake duct for determining vehicle motor, and determine each
Air intake duct simulation model corresponding to the inlet valve lift test point；
Gridding module 200, for carrying out net to air intake duct simulation model corresponding to each inlet valve lift test point
Format；
Condition setting module 300, for setting computational fields perimeter strip corresponding to each air intake duct simulation model after gridding
Part, and set using Hydrodynamics Theory and calculate solver；
Simulation algorithm model 400, for emulating mould according to each air intake duct after the computational fields boundary condition and gridding
Type, using the calculating solver carry out that simulation result corresponding to each inlet valve lift test point is calculated.
Based on above-described embodiment, the model building module 100 includes：
Model establishes unit, for establishing the air intake duct simulation model of the vehicle motor；
Model corresponding unit, for being set according to each inlet valve lift test point in the air intake duct simulation model
Inlet valve lift parameter, determine air intake duct simulation model corresponding to each inlet valve lift test point.
Based on above-mentioned any embodiment, the device can also include：
Digital-to-analogue detection module, for carrying out digital-to-analogue to air intake duct simulation model corresponding to each inlet valve lift test point
Detection, and judge whether digital-to-analogue testing result meets quality requirement；
Digital-to-analogue modified module, if being unsatisfactory for quality requirement for digital-to-analogue testing result, enter to being unsatisfactory for quality requirement
Air flue simulation model is modified until corresponding air intake duct simulation model meets quality requirement.
Based on above-mentioned any embodiment, the device can also include：
Grid detection module, for carrying out grid detection to the mesh quality of each air intake duct simulation model after gridding,
And judge whether grid detection result meets quality requirement；
Mesh modification module, if being unsatisfactory for quality requirement for grid detection result, enter to being unsatisfactory for quality requirement
The grid of air flue simulation model is refined until the grid of corresponding air intake duct simulation model meets quality requirement.
Based on above-mentioned any embodiment, entrance and the pressure differential range of outlet in the computational fields boundary condition are 2500Pa
~6500Pa.
Based on above-mentioned any embodiment, simulation algorithm model 400 includes：
Judging unit is restrained, for being calculated using the calculating solver, and judges to calculate and whether restrains；
Output unit, if being restrained for calculating, imitated using result of calculation as corresponding to corresponding inlet valve lift test point
True result；
Convergence modification unit, if not restrained for calculating, the air intake duct of inlet valve lift test point is imitated corresponding to modification
The computational fields boundary condition of the air intake duct simulation model of inlet valve lift test point is straight corresponding to the grid of true mode and/or modification
Restrained to calculating.
Based on above-mentioned any embodiment, the simulation result includes：
Discharge coefficient and vortex/Tumble intensity numerical value and/or air flue and cylinder interior gas VELOCITY DISTRIBUTION and streamline.
Based on above-mentioned any embodiment, the device can also include：
Module is checked, for the air intake duct simulation model to be checked with test model, whether judges check result
In predictive error；
Modified module, if for check result not in predictive error, corresponding air intake duct simulation model is repaiied
Change the check result until corresponding air intake duct simulation model in predictive error.
Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Detailed Jie has been carried out to the method and device of vehicle motor air intake duct simulation calculation provided by the present invention above
Continue.Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is only
It is the method and its core concept for being used to help understand the present invention.It should be pointed out that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these improve and repaiied
Decorations are also fallen into the protection domain of the claims in the present invention.
Claims (10)
- A kind of 1. method of vehicle motor air intake duct simulation calculation, it is characterised in that including：The inlet valve lift test point of the air intake duct of vehicle motor is determined, and determines that each inlet valve lift test point is corresponding Air intake duct simulation model；Gridding is carried out to air intake duct simulation model corresponding to each inlet valve lift test point；Computational fields boundary condition corresponding to each air intake duct simulation model after gridding is set, and set using Hydrodynamics Theory Calculate solver；According to each air intake duct simulation model after the computational fields boundary condition and gridding, carried out using the calculating solver Simulation result corresponding to each inlet valve lift test point is calculated.
- 2. the method for vehicle motor air intake duct simulation calculation according to claim 1, it is characterised in that determine each described Air intake duct simulation model corresponding to inlet valve lift test point, including：Establish the air intake duct simulation model of the vehicle motor；Inlet valve lift parameter in the air intake duct simulation model is set according to each inlet valve lift test point, it is determined that respectively Air intake duct simulation model corresponding to the inlet valve lift test point.
- 3. the method for vehicle motor air intake duct simulation calculation according to claim 2, it is characterised in that determine each described After air intake duct simulation model corresponding to inlet valve lift test point, in addition to：Digital-to-analogue detection is carried out to air intake duct simulation model corresponding to each inlet valve lift test point, and judges digital-to-analogue detection knot Whether fruit meets quality requirement；If not satisfied, then the air intake duct simulation model for being unsatisfactory for quality requirement is modified until corresponding air intake duct emulates mould Type meets quality requirement.
- 4. the method for vehicle motor air intake duct simulation calculation according to claim 3, it is characterised in that to it is each it is described enter After air intake duct simulation model corresponding to valve stroke test point carries out gridding, in addition to：Grid detection is carried out to the mesh quality of each air intake duct simulation model after gridding, and whether judges grid detection result Meet quality requirement；If not satisfied, then the grid of the air intake duct simulation model to being unsatisfactory for quality requirement is refined until corresponding air intake duct The grid of simulation model meets quality requirement.
- 5. the method for vehicle motor air intake duct simulation calculation according to claim 4, it is characterised in that the computational fields Entrance and the pressure differential range of outlet in boundary condition are 2500Pa~6500Pa.
- 6. the method for vehicle motor air intake duct simulation calculation according to claim 5, it is characterised in that utilize the meter Solver is calculated to carry out that simulation result corresponding to each inlet valve lift test point is calculated, including：Calculated using the calculating solver, and judge to calculate and whether restrain；If convergence, using result of calculation as simulation result corresponding to corresponding inlet valve lift test point；If not restraining, the grid of the air intake duct simulation model of inlet valve lift test point corresponding to modification and/or modification are corresponding Inlet valve lift test point air intake duct simulation model computational fields boundary condition until calculate restrain.
- 7. the method for the vehicle motor air intake duct simulation calculation according to claim any one of 1-6, it is characterised in that institute Stating simulation result includes：Discharge coefficient and vortex/Tumble intensity numerical value and/or air flue and cylinder interior gas VELOCITY DISTRIBUTION and streamline.
- 8. the method for vehicle motor air intake duct simulation calculation according to claim 7, it is characterised in that to it is each it is described enter Before air intake duct simulation model corresponding to valve stroke test point carries out gridding, in addition to：The air intake duct simulation model is checked with test model, judges check result whether in predictive error；If not existing, corresponding air intake duct simulation model is modified until the check result of corresponding air intake duct simulation model In predictive error.
- A kind of 9. device of vehicle motor air intake duct simulation calculation, it is characterised in that including：Model building module, the inlet valve lift test point of the air intake duct for determining vehicle motor, and determine it is each it is described enter Air intake duct simulation model corresponding to valve stroke test point；Gridding module, for carrying out gridding to air intake duct simulation model corresponding to each inlet valve lift test point；Condition setting module, for setting computational fields boundary condition corresponding to each air intake duct simulation model after gridding, and profit Set with Hydrodynamics Theory and calculate solver；Simulation algorithm model, for according to each air intake duct simulation model after the computational fields boundary condition and gridding, utilizing The calculating solver carries out that simulation result corresponding to each inlet valve lift test point is calculated.
- 10. the device of vehicle motor air intake duct simulation calculation according to claim 9, it is characterised in that the emulation As a result include：Discharge coefficient and vortex/Tumble intensity numerical value and/or air flue and cylinder interior gas VELOCITY DISTRIBUTION and streamline.
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| CN109446660A (en) * | 2018-10-31 | 2019-03-08 | 潍柴动力股份有限公司 | A kind of engine inlets automatic optimization method and device |
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| CN115342010A (en) * | 2022-10-14 | 2022-11-15 | 潍柴动力股份有限公司 | Air inlet pipe guide assembly installation structure and arrangement method |
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