CN107526890A - A kind of automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method - Google Patents
A kind of automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method Download PDFInfo
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Abstract
The invention discloses a kind of automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method, including：Determine optimization object function Fi(x1,x2,…,xN)；Determine optimization aim independent variable x1,x2,…,xN；Independent variable is initialized, and gives each independent variable xjStep-size in search εj, wherein j=1,2 ..., N；According to initialization independent variable and the structure radiating tube three-dimensional heat dissipation model of ambient boundary condition, and it is based on CFD fluid-solid conjugated heat transfer principle calculation optimization object functions Fi(x1,x2,…,xN)；Whether inspection optimization object function has reached minimum value, if having reached minimum value, optimization process terminates, and exports optimized results F nowopWith xop；If object function is not up to minimum value, each independent variable x is calculatedjSensitivity FactorCalculate each independent variable xjThe conjugate gradient factorCalculate each independent variable xjThe direction of searchUpdate the value of independent variableAgain radiating tube three-dimensional heat dissipation model is built, and performs the step.
Description
Technical field
The present invention relates to automobile radiators radiating tube flow Field Design and structural optimization method, more particularly to a kind of car radiation
Device hyperboloid of one sheet radiating tube flow Field Design and structural optimization method.
Background technology
Automobile radiators are critical components essential in automobile water-cooling engine-cooling system, wherein, single leaf hyperbolic
Face radiating tube can effectively strengthen ability to bear of the radiating tube intake-outlet for water impact, reduce radiating tube intake-outlet
Fatigue failure, the waterpower crushing at radiating tube intake-outlet is reduced, reduce vortex and flow blind angle, improve fluid structurecoupling to wandering
The thermal efficiency.To seek the hyperboloid of one sheet radiation tube structure with heat optimized, a kind of automobile radiators hyperboloid of one sheet radiating tube is designed
Flow Field Design is very necessary with structural optimization method, for instructing the design and optimization of single page hyperboloid radiating tube to have actual meaning
Justice.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of automobile radiators hyperboloid of one sheet radiating tube stream
Field design and structural optimization method, this method need not recalculate step-size in search, can largely save the Optimized Iterative time, and step
Clearly, logic is sincerely close, is effectively used for automobile radiators hyperboloid of one sheet radiating tube key structural feature parameter optimization.
The purpose of the present invention is realized by following technical scheme：
A kind of automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method, including：
1. determine optimization object function Fi(x1,x2,...,xN)；
2. determine optimization aim independent variable x1,x2,...,xN；
3. initializing independent variable, and give each independent variable xjStep-size in search εj, wherein j=1,2 ..., N；
4. flowed according to initialization independent variable and the structure radiating tube three-dimensional heat dissipation model of ambient boundary condition, and based on CFD
Gu Coupled Heat Transfer principle calculation optimization object function Fi(x1,x2,...,xN)；
5. whether inspection optimization object function has reached minimum value, if having reached minimum value, optimization process terminates,
And export optimized results F nowopWith xop；
6. if object function is not up to minimum value, each independent variable x is calculatedjSensitivity FactorIts
InFor differential sign, n is iterations variable；
7. calculate each independent variable xjThe conjugate gradient factor
8. calculate each independent variable xjThe direction of search
9. update the value of independent variableStep is come back to 4. to start to perform.
Compared with prior art, one or more embodiments of the invention can have the following advantages that：
Step-size in search need not be recalculated, can largely save the Optimized Iterative time, and step is clear, logic is sincerely close, can have
Effect ground is used for automobile radiators hyperboloid of one sheet radiating tube key structural feature parameter optimization.
Brief description of the drawings
Fig. 1 is automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method flow graph.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing to this hair
It is bright to be described in further detail.
As shown in figure 1, be automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method flow, including
Following steps：
Determine optimization object function Fi(x1,x2,...,xN)；
Determine optimization aim independent variable x1,x2,...,xN；
Independent variable is initialized, and gives each independent variable xjStep-size in search εj, wherein j=1,2 ..., N；
According to initialization independent variable and the structure radiating tube three-dimensional heat dissipation model of ambient boundary condition, and it is solid based on CFD streams
Coupled Heat Transfer principle calculation optimization object function Fi(x1,x2,...,xN)；
Whether inspection optimization object function has reached minimum value, if having reached minimum value, optimization process terminates, and
The optimized results F of output nowopWith xop；
If object function is not up to minimum value, each independent variable x Sensitivity Factor is calculated
Calculate each independent variable xjThe conjugate gradient factor
Calculate each independent variable xjThe direction of search
Update the value of independent variableRebuild radiating tube three-dimensional heat dissipation model, and from the step
It is rapid to perform.
In above-mentioned steps, optimization object function Fi(x1,x2,...,xN) it is hyperboloid of one sheet radiating tube evaluation index, including
Intake-outlet fluid mean temperature difference Δ T, the weight assignment group for entering delivery port fluid average pressure difference Δ P or said two devices
Close, wherein：
F3=θ (Δ T/ Δs Top)+(1-θ)(Δp/Δpop) (3)
Wherein, A is area variable symbol, Ac,in、Ac,outRespectively radiate tube inlet and exit area, Tin,i、
Tout,iRespectively radiate tube inlet and outlet fluid units element temperature, pin,i、pout,iThe tube inlet that respectively radiates flows with outlet
Body identity element pressure, Δ TopWith Δ PopRespectively optimal or minimum intake-outlet temperature difference and optimal or minimum intake-outlet
Crushing, θ are importance factor, θ=0-1.
Above-mentioned steps determine optimization aim independent variable x1,x2,...,xNJoin for hyperboloid of one sheet radiating tube optimization aim structure
Number, including pipe thickness δ, the hyperboloid of one sheet disengaging water swivel true length axle 2a, real short axle 2b and imaginary axis 2c.
Each independent variable x in above-mentioned stepsjSensitivity FactorIts calculation formula is：
Wherein, Δ xjFor adjacent iteration independent variable x twicejDifference.
Above-mentioned each independent variable xjThe conjugate gradient factorCalculation formula be：
Wherein, during first time iteration, i.e. during n=1,
Each independent variable x in the stepjThe direction of searchCalculation formula be：
Although disclosed herein embodiment as above, described content only to facilitate understand the present invention and adopt
Embodiment, it is not limited to the present invention.Any those skilled in the art to which this invention pertains, this is not being departed from
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (6)
1. a kind of automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method, it is characterised in that the side
Method includes：
1. determine optimization object function Fi(x1,x2,...,xN)；
2. determine optimization aim independent variable x1,x2,...,xN；
3. initializing independent variable, and give each independent variable xjStep-size in search εj, wherein j=1,2 ..., N；
4. according to initialization independent variable and the structure radiating tube three-dimensional heat dissipation model of ambient boundary condition, and based on the solid coupling of CFD streams
Close heat transfer theory calculation optimization object function Fi(x1,x2,...,xN)；
5. whether inspection optimization object function has reached minimum value, if having reached minimum value, optimization process terminates, and defeated
Go out optimized results F nowopWith xop；
6. if object function is not up to minimum value, each independent variable x is calculatedjSensitivity FactorWherein
For differential sign, n is iterations variable；
7. calculate each independent variable xjThe conjugate gradient factor
8. calculate each independent variable xjThe direction of search
9. update the value of independent variableStep is come back to 4. to start to perform.
2. automobile radiators hyperboloid of one sheet radiating tube flow Field Design as claimed in claim 1 and structural optimization method, it is special
Sign is, the step 1. in, optimization object function Fi(x1,x2,...,xN) it is hyperboloid of one sheet radiating tube evaluation index, bag
Include intake-outlet fluid mean temperature difference Δ T, enter the weight assignment of delivery port fluid average pressure difference Δ P or said two devices
Combination, wherein：
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F3=θ (Δ T/ Δs Top)+(1-θ)(Δp/Δpop) (3)
Wherein, A is area variable symbol, Ac,in、Ac,outRespectively radiate tube inlet and exit area, Tin,i、Tout,iPoint
Wei not radiate tube inlet and outlet fluid units element temperature, pin,i、pout,iRespectively radiate tube inlet and outlet fluid units
Element pressure, Δ TopWith Δ PopRespectively optimal or minimum intake-outlet temperature difference and optimal or minimum intake-outlet crushing, θ
For importance factor, θ=0-1.
3. automobile radiators hyperboloid of one sheet radiating tube flow Field Design as claimed in claim 1 and structural optimization method, it is special
Sign is, the step 2. in, determine optimization aim independent variable x1,x2,...,xNFor hyperboloid of one sheet radiating tube optimization aim knot
Structure parameter, including pipe thickness δ, the hyperboloid of one sheet disengaging water swivel true length axle 2a, real short axle 2b and imaginary axis 2c.
4. automobile radiators hyperboloid of one sheet radiating tube flow Field Design as claimed in claim 1 and structural optimization method, it is special
Sign is, the step 6. in, each independent variable xjSensitivity FactorIts calculation formula is：
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5. automobile radiators hyperboloid of one sheet radiating tube flow Field Design as claimed in claim 1 and structural optimization method, it is special
Sign is, each independent variable xjThe conjugate gradient factorCalculation formula be：
Wherein, during first time iteration, i.e. during n=1,
6. automobile radiators hyperboloid of one sheet radiating tube flow Field Design as claimed in claim 1 and structural optimization method, it is special
Sign is, the step 8. in, each independent variable xjThe direction of searchCalculation formula be：
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710728383.8A CN107526890B (en) | 2017-08-23 | 2017-08-23 | Method for designing and optimizing flow field of single-blade hyperboloid radiating pipe of automobile radiator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710728383.8A CN107526890B (en) | 2017-08-23 | 2017-08-23 | Method for designing and optimizing flow field of single-blade hyperboloid radiating pipe of automobile radiator |
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| CN107526890B CN107526890B (en) | 2020-05-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110990939A (en) * | 2019-10-10 | 2020-04-10 | 西北工业大学 | Anti-icing cavity structure reliability design method |
| CN115618502A (en) * | 2022-12-14 | 2023-01-17 | 四川腾盾科技有限公司 | Efficient design method suitable for air intake and exhaust of propeller-driven aircraft engine radiator |
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|---|---|---|---|---|
| CN102332041A (en) * | 2011-08-30 | 2012-01-25 | 山东同创汽车散热装置股份有限公司 | Heat radiating performance analysis and structure design system for tube and fin type radiator |
| CN102508355A (en) * | 2011-11-23 | 2012-06-20 | 上海晶电新能源有限公司 | Discretized secondary reflecting system |
| US20130299145A1 (en) * | 2012-04-19 | 2013-11-14 | National University Of Singapore | Heat sink system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332041A (en) * | 2011-08-30 | 2012-01-25 | 山东同创汽车散热装置股份有限公司 | Heat radiating performance analysis and structure design system for tube and fin type radiator |
| CN102508355A (en) * | 2011-11-23 | 2012-06-20 | 上海晶电新能源有限公司 | Discretized secondary reflecting system |
| US20130299145A1 (en) * | 2012-04-19 | 2013-11-14 | National University Of Singapore | Heat sink system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110990939A (en) * | 2019-10-10 | 2020-04-10 | 西北工业大学 | Anti-icing cavity structure reliability design method |
| CN110990939B (en) * | 2019-10-10 | 2024-04-19 | 西北工业大学 | Method for designing reliability of anti-icing cavity structure |
| CN115618502A (en) * | 2022-12-14 | 2023-01-17 | 四川腾盾科技有限公司 | Efficient design method suitable for air intake and exhaust of propeller-driven aircraft engine radiator |
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