CN107491573A - A kind of method and device of engine performance detection - Google Patents
A kind of method and device of engine performance detection Download PDFInfo
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- CN107491573A CN107491573A CN201610952556.XA CN201610952556A CN107491573A CN 107491573 A CN107491573 A CN 107491573A CN 201610952556 A CN201610952556 A CN 201610952556A CN 107491573 A CN107491573 A CN 107491573A
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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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Abstract
The invention discloses a kind of method of engine performance detection, including：Cooling jacket CFD calculating, the first nearly wall temperature mapped and first coefficient of heat transfer are carried out using the fixed wall temperature of setting；The described first nearly wall temperature and first coefficient of heat transfer are carried out into the engine FEA as the boundary condition that engine FEA is calculated to calculate, obtain water jacket wall surface temperature；The cooling jacket CFD is carried out using the water jacket wall surface temperature to calculate, the second nearly wall temperature mapped and the cooling water jacket flow field analysis result of second coefficient of heat transfer and engine；This method ensure that engine cooling water jacket CFD calculating closing to reality situation, ensure that the reliability of result of calculation, supported to ensure that the normal operation of engine provides strong data；The invention also discloses a kind of device of engine performance detection, there is above-mentioned beneficial effect.
Description
Technical field
The present invention relates to Vehicle Engineering technical field, more particularly to a kind of method and device of engine performance detection.
Background technology
In engine development, in order to ensure the normal operation of engine, it is necessary to which carrying out FEA, (i.e. FInite Element one kind has
The numerical computation method of effect) calculate checking parts temperature in the reasonable scope.And cooling jacket CFD (calculates fluid dynamic
Learn) whether calculate the flow field that can not only assess in water jacket reasonable, it is also necessary to provide boundary condition for FEA calculating.
The cooling jacket CFD of existing engine, which is calculated, mainly passes through CFD software, and the flow field in cooling jacket is carried out
Sunykatuib analysis, analyze water jacket in cooling water mobility status, and provide coolant nearly wall temperature and the coefficient of heat transfer as cylinder body
Cylinder cap is the boundary condition that engine FEA is calculated, and can be used when doing optimization analysis for water jacket.And existing engine cooling water
Set CFD calculating is carried out using fixed wall temperature, it is impossible to reacts real wall surface temperature, therefore it can not accurately reflect
Real Flow Field situation in cooling jacket.How so that engine cooling water jacket CFD calculating close to actual conditions,
Accurately to make evaluation to the performance of the engine of exploitation, so as to ensure the normal operation of engine.
The content of the invention
It is an object of the invention to provide a kind of method and device of engine performance detection, this method ensure that engine is cold
But water jacket CFD calculating closing to reality situation, ensure that the reliability of result of calculation, to ensure that the normal operation of engine provides
Strong data are supported.
In order to solve the above technical problems, the present invention provides a kind of method of engine performance detection, including：
Cooling jacket CFD calculating, the first nearly wall temperature mapped and the are carried out using the fixed wall temperature of setting
One coefficient of heat transfer；
Described first nearly wall temperature and first coefficient of heat transfer are subjected to institute as the boundary condition that engine FEA is calculated
Engine FEA calculating is stated, obtains water jacket wall surface temperature；
Using the water jacket wall surface temperature cooling jacket CFD is carried out to calculate, the second nearly wall temperature for being mapped and
The cooling water jacket flow field analysis result of second coefficient of heat transfer and engine.
Optionally, cooling jacket CFD calculating is carried out using the fixed wall temperature of setting, including：
Establish the three-dimensional digital-to-analogue of cooling jacket；Wherein, the three-dimensional digital-to-analogue includes water jacket and the cylinder pad water hole of gray iron
The closed computation domain of composition；
The three-dimensional digital-to-analogue is subjected to mesh generation according to physical dimension；
Using the fixed wall temperature of setting as boundary condition, cooling jacket is carried out to the three-dimensional digital-to-analogue of gridding
CFD is calculated.
Optionally, after the three-dimensional digital-to-analogue being carried out into mesh generation according to physical dimension, in addition to：
Grid detection is carried out to the mesh quality of the three-dimensional digital-to-analogue after mesh generation, and judges whether grid detection result is full
Sufficient quality requirement；
If not satisfied, then the grid of the three-dimensional digital-to-analogue to being unsatisfactory for quality requirement is refined until corresponding three-dimensional digital-to-analogue
Grid meet quality requirement.
Optionally, the cooling jacket CFD is carried out using the water jacket wall surface temperature to calculate, including：
The cooling jacket CFD is carried out using the water jacket wall surface temperature combination wall boiling heat transfer model to calculate.
Optionally, this method also includes：
Described second nearly wall temperature and second coefficient of heat transfer are entered as the engine FEA boundary conditions calculated
The row engine FEA is calculated, and obtains the heated situation of the engine.
The present invention also provides a kind of device of engine performance detection, including：
First cooling jacket CFD computing modules, based on carrying out cooling jacket CFD using the fixed wall temperature of setting
Calculate, the first nearly wall temperature mapped and first coefficient of heat transfer；
First engine FEA computing modules, for using the described first nearly wall temperature and first coefficient of heat transfer as hair
The boundary condition that motivation FEA is calculated carries out the engine FEA and calculated, and obtains water jacket wall surface temperature；
Second cooling jacket CFD computing modules, based on carrying out the cooling jacket CFD using the water jacket wall surface temperature
Calculate, the second nearly wall temperature mapped and the cooling jacket process analysis result of second coefficient of heat transfer and engine.
Optionally, the first cooling jacket CFD computing modules include：
Digital-to-analogue establishes unit, for establishing the three-dimensional digital-to-analogue of cooling jacket；Wherein, the three-dimensional digital-to-analogue includes cylinder body, cylinder
The closed computation domain of water jacket and cylinder pad the water hole composition of lid；
Mesh generation unit, for the three-dimensional digital-to-analogue to be carried out into mesh generation according to physical dimension；
First cooling jacket CFD computing units, for using the fixed wall temperature of setting as boundary condition, to gridding
Three-dimensional digital-to-analogue carry out cooling jacket CFD calculating.
Optionally, the device also includes：
Grid detection module, for carrying out grid detection to the mesh quality of the three-dimensional digital-to-analogue after mesh generation, and judge
Whether grid detection result meets quality requirement；
Mesh refinement module, if quality requirement is unsatisfactory for for the grid detection result, to being unsatisfactory for quality requirement
The grid of three-dimensional digital-to-analogue refined until the grid of corresponding three-dimensional digital-to-analogue meets quality requirement.
Optionally, the second cooling jacket CFD computing modules include：
Second cooling jacket CFD computing units, for utilizing the water jacket wall surface temperature combination wall boiling heat transfer model
The cooling jacket CFD is carried out to calculate.
Optionally, the device also includes：
Second engine FEA computing modules, for using the described second nearly wall temperature and second coefficient of heat transfer as FEA
The boundary condition of calculating carries out the FEA calculating, obtains the heated situation of the engine.
The method of engine performance detection provided by the present invention, including：Carried out using the fixed wall temperature of setting cold
But water jacket CFD is calculated, the first nearly wall temperature mapped and first coefficient of heat transfer；By the described first nearly wall temperature and described
One coefficient of heat transfer carries out the engine FEA as the boundary condition that engine FEA is calculated and calculated, and obtains water jacket wall surface temperature；
The cooling jacket CFD is carried out using the water jacket wall surface temperature to calculate, the second nearly wall temperature mapped and the second heat exchange
The cooling water jacket flow field analysis result of coefficient and engine；
It can be seen that this method is changed when directly carrying out cooling jacket CFD calculating using fixed wall temperature in the prior art
The shortcomings that actual wall surface temperature can not be reacted, the actual water jacket wall surface temperature that engine FEA is calculated is as wall surface temperature
Boundary condition carries out cooling jacket CFD and calculates the calculating closing to reality situation that ensure that engine cooling water jacket CFD, ensure that meter
The reliability of result is calculated, is supported to ensure that the normal operation of engine provides strong data；The invention also discloses one kind to send out
The device of motivation performance detection, there is 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.
The flow chart for the method that the engine performance that Fig. 1 is provided by the embodiment of the present invention detects；
The flow chart for the method that the engine performance that Fig. 2 is provided by the embodiment of the present invention detects；
The structured flowchart for the device that the engine performance that Fig. 3 is provided by the embodiment of the present invention detects；
The structured flowchart for the device that another engine performance that Fig. 4 is provided by the embodiment of the present invention detects.
Embodiment
The core of the present invention is to provide a kind of method and device of engine performance detection, this method ensure that engine is cold
But water jacket CFD calculating closing to reality situation, ensure that the reliability of result of calculation, to ensure that the normal operation of engine provides
Strong data are supported.
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, the flow chart for the method that the engine performance that Fig. 1 is provided by the embodiment of the present invention detects；It is also square
Method can include：
S100, the fixed wall temperature progress cooling jacket CFD calculating using setting, the first nearly wall temperature mapped
With first coefficient of heat transfer；
Specifically, the step carries out cooling jacket CFD calculating using the fixed wall temperature of setting, to obtain accurate water
Set wall surface temperature is prepared.Here the setting value of fixed wall temperature is determined by user.It is calculated carrying out cooling jacket CFD
It is preceding, it is necessary to establish the digital-to-analogue of cooling jacket.Cooling jacket digital-to-analogue (cooling jacket can be established using modeling tool (such as CAD)
Three-dimensional digital-to-analogue).The present embodiment does not limit specific modeling process and method, does not limit the dimension of cooling jacket digital-to-analogue yet.
The accuracy and reliability subsequently calculated further for raising to the digital-to-analogue of cooling jacket, it is necessary to carry out digital-to-analogue quality testing.
When the digital-to-analogue of cooling jacket meets digital-to-analogue quality testing requirement, subsequent operation is just carried out；The present embodiment is not to specific number
Mould quality testing mode is defined.
Vividly accurately cooling jacket can be described for threedimensional model.Following three-dimensional digital-to-analogues with cooling jacket are illustrated
Illustrate the detailed process of the step：
Establish the three-dimensional digital-to-analogue of cooling jacket；Wherein, the three-dimensional digital-to-analogue includes water jacket and the cylinder pad water hole of gray iron
The closed computation domain of composition；
The three-dimensional digital-to-analogue is subjected to mesh generation according to physical dimension；
Using the fixed wall temperature of setting as boundary condition, cooling jacket is carried out to the three-dimensional digital-to-analogue of gridding
CFD is calculated.
Specifically, water jacket wall is arranged into fixed temperature border, estimate i.e. fixed wall temperature are given, is entered
Row first time flow field CFD is calculated.Mainly for obtaining the first nearly wall temperature of boundary condition and first of subsequent engine FEA calculating
The coefficient of heat transfer.
Directly influence the speed and precision subsequently calculated further as mesh quality, thus the present embodiment in order to ensure
Mesh quality meets to require, mesh quality can be checked, undesirable to mesh quality, then needs again to grid
Divided.It is i.e. optional, grid detection is carried out to the mesh quality of the three-dimensional digital-to-analogue after mesh generation, and judge grid detection
As a result whether quality requirement is met；If not satisfied, then the grid of the three-dimensional digital-to-analogue to being unsatisfactory for quality requirement refined until
The grid of corresponding three-dimensional digital-to-analogue meets quality requirement.The present embodiment is not limited specific mesh quality detection mode
It is fixed.
S110, the boundary condition for calculating the described first nearly wall temperature and first coefficient of heat transfer as engine FEA
Carry out the engine FEA to calculate, obtain water jacket wall surface temperature；
Specifically, the step counts the obtained in S100 first nearly wall temperature and first coefficient of heat transfer as engine FEA
The boundary condition of calculation carries out engine FEA calculating, obtains water jacket wall surface temperature, the water jacket wall surface temperature considers the reality of engine
Border operating mode, real water jacket wall surface temperature more closing to reality situation can be reacted.Cooling water is carried out using the water jacket wall surface temperature
Cover CFD to calculate, the Real Flow Field situation that can accurately reflect in cooling jacket.
S120, carry out the cooling jacket CFD using the water jacket wall surface temperature and calculate, the second nearly wall temperature mapped
The cooling water jacket flow field analysis result of degree and second coefficient of heat transfer and engine.
Specifically, the step will be obtained in S110 water jacket wall surface temperature re-map to cooling jacket CFD calculate make perimeter strip
Part, the flowing of cooling water in water jacket can more really be reflected by carrying out cooling jacket CFD calculating using the water jacket wall surface temperature
Whether situation, can reasonable with the flow field in accurate evaluation water jacket, accurately to make evaluation to the performance of the engine of exploitation,
So as to ensure the normal operation of engine.
Based on above-mentioned technical proposal, the method for the engine performance detection that the embodiment of the present invention carries, prior art is changed
In the shortcomings that can not reacting actual wall surface temperature when directly carrying out cooling jacket CFD calculating using fixed wall temperature, will start
The actual water jacket wall surface temperature that machine FEA is calculated ensure that as the progress cooling jacket CFD calculating of wall surface temperature parameter to be started
Machine cooling jacket CFD calculating closing to reality situation, ensure that the reliability of result of calculation, to ensure the normal operation of engine
Strong data are provided to support.
It is cold in water jacket in order to further make cooling jacket CFD calculating more really to reflect based on above-described embodiment
But the mobility status of water, it is whether reasonable so as to the flow field more in accurate evaluation water jacket, so as to accurately to the hair of exploitation
The performance of motivation makes evaluation, so as to ensure the normal operation of engine.It is therefore preferred that entered using the water jacket wall surface temperature
The row cooling jacket CFD is calculated and can included：
The cooling jacket CFD is carried out using the water jacket wall surface temperature combination wall boiling heat transfer model to calculate.Tie
Close boiling heat transfer model and carry out cooling jacket CFD calculating.The perimeter strip for having used the real wall surface temperature of fitting to be calculated as CFD
Part, and the coolant boiling phenomenon occurred in operating condition is considered, can be with the flowing of real simulation coolant and heat exchange feelings
Condition simulates real work state and carries out cooling jacket CFD calculating as much as possible, and obtained result is more genuine and believable, such as defeated
The the second nearly wall temperature gone out and the cooling water jacket flow field analysis result of second coefficient of heat transfer and engine are with a high credibility.
Based on above-described embodiment, in order to further accurately make evaluation to the performance of the engine of exploitation, it is also necessary to make
Obtain the result of the engine FEA calculating relevant with engine performance evaluation more accurately and reliably.Cooling jacket CFD is calculated as starting
The accurate boundary condition of machine FEA calculating offers (such as the nearly wall temperature of offer coolant and the coefficient of heat transfer are as cylinder block and head
The boundary condition that engine FEA is calculated), it can be used when doing optimization analysis for water jacket.But if calculated using prior art
The boundary condition that the nearly wall temperature and the coefficient of heat transfer of the water jacket come calculate as engine FEA, then can cause engine FEA to calculate
The temperature field gone out is inaccurate, it is impossible to truly reflects the heated situation of engine (referring mainly to cylinder block and head).Therefore it is guarantee FEA knots
The accuracy of fruit, the cooling jacket CFD of engine calculating also must be close to actual conditions.Therefore, the present embodiment
What the second nearly wall temperature and second coefficient of heat transfer that can be calculated by the use of above-described embodiment were calculated as the engine FEA
Boundary condition carries out engine FEA calculating.I.e. this method can also include：
Described second nearly wall temperature and second coefficient of heat transfer are entered as the engine FEA boundary conditions calculated
The row engine FEA is calculated, and obtains the heated situation of the engine.Concrete condition refer to Fig. 2.
Based on above-mentioned technical proposal, the method for engine performance detection provided in an embodiment of the present invention, use more true
The boundary condition that real wall surface temperature calculates as cooling jacket CFD, and consider the coolant boiling occurred in operating condition
Phenomenon is risen, simulates real work state as much as possible, the nearly wall coolant temperature and the coefficient of heat transfer of output are more credible, Ke Yiwei
Follow-up engine FEA, which is calculated, provides accurate boundary condition, it can be considered that the various influence factors under actual motion state, can
To provide accurate result of calculation, supported to ensure that the normal operation of engine provides strong data.
The device of engine performance provided in an embodiment of the present invention detection is introduced below, engine described below
The method that the device of performance detection detects with above-described engine performance can be mutually to should refer to.
It refer to Fig. 3, the structured flowchart for the device that the engine performance that Fig. 3 is provided by the embodiment of the present invention detects；Should
Device can include：
First cooling jacket CFD computing modules 100, for carrying out cooling jacket CFD using the fixed wall temperature of setting
Calculate, the first nearly wall temperature mapped and first coefficient of heat transfer；
First engine FEA computing modules 200, for using the described first nearly wall temperature and first coefficient of heat transfer as
The boundary condition that engine FEA is calculated carries out the engine FEA and calculated, and obtains water jacket wall surface temperature；
Second cooling jacket CFD computing modules 300, for carrying out the cooling jacket using the water jacket wall surface temperature
CFD is calculated, the second nearly wall temperature mapped and the cooling jacket process analysis result of second coefficient of heat transfer and engine.
Based on above-described embodiment, the first cooling jacket CFD computing modules 100 include：
Digital-to-analogue establishes unit, for establishing the three-dimensional digital-to-analogue of cooling jacket；Wherein, the three-dimensional digital-to-analogue includes cylinder body, cylinder
The closed computation domain of water jacket and cylinder pad the water hole composition of lid；
Mesh generation unit, for the three-dimensional digital-to-analogue to be carried out into mesh generation according to physical dimension；
First cooling jacket CFD computing units, for using the fixed wall temperature of setting as boundary condition, to gridding
Three-dimensional digital-to-analogue carry out cooling jacket CFD calculating.
Based on above-mentioned any embodiment, the device can also include：
Grid detection module, for carrying out grid detection to the mesh quality of the three-dimensional digital-to-analogue after mesh generation, and judge
Whether grid detection result meets quality requirement；
Mesh refinement module, if quality requirement is unsatisfactory for for the grid detection result, to being unsatisfactory for quality requirement
The grid of three-dimensional digital-to-analogue refined until the grid of corresponding three-dimensional digital-to-analogue meets quality requirement.
Based on above-mentioned any embodiment, the second cooling jacket CFD computing modules 300 include：
Second cooling jacket CFD computing units, for utilizing the water jacket wall surface temperature combination wall boiling heat transfer model
The cooling jacket CFD is carried out to calculate.
Based on above-mentioned any embodiment, Fig. 4 is refer to, the device can also include：
Second engine FEA computing modules 400, for using the described second nearly wall temperature and second coefficient of heat transfer as
The boundary condition that FEA is calculated carries out the FEA calculating, obtains the heated situation of the engine.
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.
The method and device of engine performance provided by the present invention detection is described in detail above.Herein should
The principle and embodiment of the present invention are set forth with specific case, the explanation of above example is only intended to help and managed
Solve the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, do not departing from
On the premise of the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into this hair
In bright scope of the claims.
Claims (10)
- A kind of 1. method of engine performance detection, it is characterised in that including：Cooling jacket CFD calculating is carried out using the fixed wall temperature of setting, the first nearly wall temperature mapped and first is changed Hot coefficient；Described first nearly wall temperature and first coefficient of heat transfer are subjected to the hair as the boundary condition that engine FEA is calculated Motivation FEA is calculated, and obtains water jacket wall surface temperature；The cooling jacket CFD is carried out using the water jacket wall surface temperature to calculate, the second nearly wall temperature mapped and second The cooling water jacket flow field analysis result of the coefficient of heat transfer and engine.
- 2. the method for engine performance detection according to claim 1, it is characterised in that utilize the fixed wall temperature of setting Degree carries out cooling jacket CFD calculating, including：Establish the three-dimensional digital-to-analogue of cooling jacket；Wherein, the three-dimensional digital-to-analogue includes the water jacket and cylinder pad water hole composition of gray iron Closed computation domain；The three-dimensional digital-to-analogue is subjected to mesh generation according to physical dimension；Using the fixed wall temperature of setting as boundary condition, cooling jacket CFD meters are carried out to the three-dimensional digital-to-analogue of gridding Calculate.
- 3. the method for engine performance detection according to claim 2, it is characterised in that by the three-dimensional digital-to-analogue according to knot After structure size carries out mesh generation, in addition to：Grid detection is carried out to the mesh quality of the three-dimensional digital-to-analogue after mesh generation, and judges whether grid detection result meets matter Amount requires；If not satisfied, then the grid of the three-dimensional digital-to-analogue to being unsatisfactory for quality requirement is refined until the net of corresponding three-dimensional digital-to-analogue Lattice meet quality requirement.
- 4. the method for engine performance detection according to claim 3, it is characterised in that utilize the water jacket wall surface temperature The cooling jacket CFD is carried out to calculate, including：The cooling jacket CFD is carried out using the water jacket wall surface temperature combination wall boiling heat transfer model to calculate.
- 5. the method for the engine performance detection according to claim any one of 1-4, it is characterised in that also include：Described second nearly wall temperature and second coefficient of heat transfer are subjected to institute as the boundary condition that the engine FEA is calculated Engine FEA calculating is stated, obtains the heated situation of the engine.
- A kind of 6. device of engine performance detection, it is characterised in that including：First cooling jacket CFD computing modules, for carrying out cooling jacket CFD calculating using the fixed wall temperature of setting, obtain To the first nearly wall temperature of mapping and first coefficient of heat transfer；First engine FEA computing modules, for using the described first nearly wall temperature and first coefficient of heat transfer as engine The boundary condition that FEA is calculated carries out the engine FEA and calculated, and obtains water jacket wall surface temperature；Second cooling jacket CFD computing modules, calculated for carrying out the cooling jacket CFD using the water jacket wall surface temperature, The cooling jacket process analysis result of the second nearly wall temperature mapped and second coefficient of heat transfer and engine.
- 7. the device of engine performance detection according to claim 6, it is characterised in that the first cooling jacket CFD Computing module includes：Digital-to-analogue establishes unit, for establishing the three-dimensional digital-to-analogue of cooling jacket；Wherein, the three-dimensional digital-to-analogue includes gray iron The closed computation domain of water jacket and cylinder pad water hole composition；Mesh generation unit, for the three-dimensional digital-to-analogue to be carried out into mesh generation according to physical dimension；First cooling jacket CFD computing units, for using the fixed wall temperature of setting as boundary condition, to the three of gridding Dimension mould carries out cooling jacket CFD calculating.
- 8. the device of engine performance detection according to claim 7, it is characterised in that also include：Grid detection module, for carrying out grid detection to the mesh quality of the three-dimensional digital-to-analogue after mesh generation, and judge grid Whether testing result meets quality requirement；Mesh refinement module, if being unsatisfactory for quality requirement for the grid detection result, three to being unsatisfactory for quality requirement The grid of dimension mould is refined until the grid of corresponding three-dimensional digital-to-analogue meets quality requirement.
- 9. the device of engine performance detection according to claim 8, it is characterised in that the second cooling jacket CFD Computing module includes：Second cooling jacket CFD computing units, for being carried out using the water jacket wall surface temperature combination wall boiling heat transfer model The cooling jacket CFD is calculated.
- 10. the device of the engine performance detection according to claim any one of 6-9, it is characterised in that also include：Second engine FEA computing modules, for the described second nearly wall temperature and second coefficient of heat transfer to be calculated as FEA Boundary condition carry out the FEA calculating, obtain the heated situation of the engine.
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