CN108168481A - Wind tunnel test segment length determines method, apparatus and electronic equipment - Google Patents
Wind tunnel test segment length determines method, apparatus and electronic equipment Download PDFInfo
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- CN108168481A CN108168481A CN201711325079.5A CN201711325079A CN108168481A CN 108168481 A CN108168481 A CN 108168481A CN 201711325079 A CN201711325079 A CN 201711325079A CN 108168481 A CN108168481 A CN 108168481A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
Abstract
The present invention relates to field of vehicle detection,Method is determined more particularly to a kind of wind tunnel test segment length,Device and electronic equipment,This method is by inputting wind data in the Free Flow Field model pre-established and multiple simulation wind tunnel models,Respectively obtain pressure distribution in the distribution of Free Flow Field pressure and multiple wind tunnel test sections,It will be in wind data and vehicle vehicle mode input Free Flow Field model and multiple simulation wind tunnel models,Respectively obtain Free Flow Field vehicle coefficient and multigroup simulation wind-tunnel vehicle coefficient,Then it is distributed according to pressure distribution and Free Flow Field pressure in multiple wind tunnel test sections,Obtain multiple wind tunnel model adaptive values,According to multigroup simulation wind-tunnel vehicle coefficient and Free Flow Field vehicle coefficient,Obtain multiple auto model adaptive values,Finally according to multiple wind tunnel model adaptive values and multiple auto model adaptive values,Obtain the wind tunnel test segment length needed for design wind-tunnel.This method can obtain accurately designing the wind tunnel test segment length needed for wind-tunnel.
Description
Technical field
The present invention relates to field of vehicle detection, and in particular to a kind of wind tunnel test segment length determines method, apparatus and electronics
Equipment.
Background technology
With the continuous improvement that the rapid development and consumer of automobile industry require automotive performance, automobile production manufacturer exists
It needs to test automobile or tested before automobile manufacture.Automobile wind tunnel automobile is tested and is tested play it is irreplaceable
Effect.The design of automobile wind tunnel has extreme influence if appropriate for the precision that automotive performance is tested.Therefore, for automobile wind tunnel
Design be an important research topic.
At present, it is to the design method of automobile wind tunnel：It tests as needed or the size of the automobile of experiment builds a reality
The scale model automobile wind tunnel of body.The automobile wind tunnel precision that the design of this method obtains is low, so that the automobile of vehicle
Energy measuring accuracy is low.
Automobile wind tunnel test segment length is the significant data that the size of automobile wind tunnel determines, thus determines accurate vapour
Vehicle wind tunnel test segment length plays a crucial role the design of automobile wind tunnel.
Invention content
The object of the present invention is to provide a kind of wind tunnel test segment length to determine method, apparatus and electronic equipment, purport
Improving the above-mentioned problems in the prior art.
An embodiment of the present invention provides a kind of wind tunnel test segment length to determine method, the method includes：Obtain wind-force number
According to vehicle vehicle model；The wind data is inputted respectively in preset multiple simulation wind tunnel models, obtains multiple not putting
Pressure is distributed in wind tunnel test section when putting vehicle, wherein, the multiple simulation wind tunnel model is surveyed according to multiple wind-tunnel of setting
Examination length value builds to obtain；By the wind data and the multiple simulation wind tunnel model of the vehicle vehicle mode input
In, obtain multigroup simulation wind-tunnel vehicle coefficient corresponding with the multiple wind tunnel test length value；By the wind-force number
In the Free Flow Field model pre-established according to input, Free Flow Field pressure distribution during vehicle is not placed；By the wind-force
In Free Flow Field model described in data and the vehicle vehicle mode input, Free Flow Field vehicle coefficient is obtained；According to described more
Pressure distribution and Free Flow Field pressure distribution when not placing vehicle, obtain in a wind tunnel test section when not placing vehicle
Multiple wind tunnel model adaptive values；According to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle coefficient, obtain more
A auto model adaptive value；According to the multiple wind tunnel model adaptive value and the multiple auto model adaptive value, designed
Wind tunnel test segment length needed for wind-tunnel.
The embodiment of the present invention additionally provides a kind of wind tunnel test segment length determining device, and the wind tunnel test segment length determines
Device includes：Test data module is obtained, for obtaining wind data and vehicle vehicle model；The empty tunnel pressure distributed mode of test
Block for the wind data to be inputted respectively in preset multiple simulation wind tunnel models, obtains multiple when not placing vehicle
Pressure is distributed in wind tunnel test section, wherein, it is the multiple to simulate multiple wind tunnel test length values of the wind tunnel model according to setting
Structure obtains；Test simulation wind-tunnel vehicle pressure coefficient module, for the wind data and the vehicle vehicle model is defeated
Enter in the multiple simulation wind tunnel model, obtain multigroup simulation wind-tunnel corresponding with the multiple wind tunnel test length value
Vehicle coefficient；The empty Free Flow Field pressure distribution module of test, for the Free Flow Field for pre-establishing wind data input
In model, Free Flow Field pressure distribution during vehicle is not placed；Free Flow Field vehicle pressure coefficient module is tested, for inciting somebody to action
In Free Flow Field model described in the wind data and the vehicle vehicle mode input, Free Flow Field vehicle coefficient is obtained；It obtains
Take wind tunnel model adaptive value module, for according to it is the multiple do not place vehicle when wind tunnel test section in pressure distribution and described
Free Flow Field pressure distribution during vehicle is not placed, obtains multiple wind tunnel model adaptive values；Auto model adaptive value module is obtained,
For according to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle coefficient, obtaining multiple auto models and adapting to
Value；Design tunnel coefficient module is obtained, for according to the multiple wind tunnel model adaptive value and the adaptation of the multiple auto model
Value obtains the wind tunnel test segment length needed for design wind-tunnel.
The embodiment of the present invention additionally provides a kind of electronic equipment, which is characterized in that the electronic equipment includes：Memory；
Processor, the processor are connect with the memory；And wind tunnel test segment length determining device, the wind tunnel test segment length
Degree determining device is stored in the memory and the computer software that can be performed including one or more by the processor
Functional module group, including：Test data module is obtained, for obtaining wind data and vehicle vehicle model；The empty wind-tunnel pressure of test
Power distribution module for the wind data to be inputted respectively in preset multiple simulation wind tunnel models, obtains multiple not placing
Pressure is distributed in wind tunnel test section during vehicle, wherein, it is the multiple to simulate multiple wind tunnel tests of the wind tunnel model according to setting
Length value builds to obtain；Test simulation wind-tunnel vehicle pressure coefficient module, for by the wind data and the vehicle vehicle
In the multiple simulation wind tunnel model of type mode input, obtain corresponding multigroup with the multiple wind tunnel test length value
Simulate wind-tunnel vehicle coefficient；The empty Free Flow Field pressure distribution module of test, for pre-establish wind data input
In Free Flow Field model, Free Flow Field pressure distribution during vehicle is not placed；Test Free Flow Field vehicle pressure coefficient mould
Block, for by Free Flow Field model described in the wind data and the vehicle vehicle mode input, obtaining Free Flow Field vehicle
Type coefficient；Obtain wind tunnel model adaptive value module, for according to it is the multiple do not place vehicle when wind tunnel test section in pressure
Distribution and Free Flow Field pressure distribution when not placing vehicle, obtain multiple wind tunnel model adaptive values；Obtain auto model
Adaptive value module, for according to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle coefficient, obtaining multiple vehicles
Model adaptive value；Design tunnel coefficient module is obtained, for according to the multiple wind tunnel model adaptive value and the multiple vehicle
Model adaptive value obtains the wind tunnel test segment length needed for design wind-tunnel.
An embodiment of the present invention provides a kind of wind tunnel test segment length to determine method, apparatus and electronic equipment, passes through first
Wind data is inputted respectively in preset multiple simulation wind tunnel models, obtained in multiple wind tunnel test sections when not placing vehicle
Pressure is distributed, wherein, multiple simulation wind tunnel models build to obtain according to multiple wind tunnel test length values of setting, by wind-force number
According to in the multiple simulation wind tunnel models of vehicle vehicle mode input, obtain corresponding more with multiple wind tunnel test length values
Group simulation wind-tunnel vehicle coefficient, when in the Free Flow Field model that pre-establishes of wind data input, will not be placed vehicle
Free Flow Field pressure is distributed, and by Free Flow Field model described in wind data and the vehicle vehicle mode input, obtains freedom
Flow field vehicle coefficient, then according to it is multiple do not place vehicle when wind tunnel test section in pressure distribution and when not placing vehicle from
It is distributed by fluid field pressure, obtains multiple wind tunnel model adaptive values, according to multigroup simulation wind-tunnel vehicle coefficient and Free Flow Field vehicle
Coefficient obtains multiple auto model adaptive values, finally according to multiple wind tunnel model adaptive values and multiple auto model adaptive values, obtains
To the wind tunnel test segment length needed for design wind-tunnel, design wind tunnel test segment length and multiple wind-tunnel of setting needed for wind-tunnel and survey
Length value is tried to correspond to.This method can obtain accurately designing the wind tunnel test segment length needed for wind-tunnel.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows that the present invention applies the block diagram of the electronic equipment 100 of example offer.
Fig. 2 shows a kind of wind tunnel test segment length provided in an embodiment of the present invention to determine method flow diagram.
Fig. 3 shows the flow chart of step S700.
Fig. 4 shows the flow chart of step S800.
Fig. 5 shows the flow chart of step S810.
Fig. 6 shows the frame structure schematic diagram of the wind tunnel test segment length determining device 200 described in Fig. 1.
Fig. 7 shows the frame structure schematic diagram for obtaining auto model adaptive value module 270.
Fig. 8 shows the frame structure schematic diagram for obtaining design tunnel coefficient module 280.
Fig. 9 shows the frame structure schematic diagram for obtaining preparation coefficient elements 281.
Icon：100- electronic equipments；101- memories；102- processors；103- Peripheral Interfaces；104- wind-force detection dress
It puts；105- display devices；200- wind tunnel test segment length determining devices；210- obtains test data module；The empty wind of 220- tests
Hole pressure distribution module；230- test simulation wind-tunnel vehicle pressure coefficient modules；The empty Free Flow Field pressure distributed mode of 240- tests
Block；250- tests Free Flow Field vehicle pressure coefficient module；260- obtains wind tunnel model adaptive value module；270- obtains vehicle mould
Type adaptive value module；271- asks for coefficient difference unit；272- obtains auto model and adapts to value cell；280- obtains design wind-tunnel system
Digital-to-analogue block；281- obtains preparation coefficient elements；The first judgment sub-units of 2811-；The second judgment sub-units of 2812-；2813- is determined
Take prepared coefficient subelement；282- judges processing units；283- determines design tunnel coefficient unit.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be configured to arrange and design with a variety of different herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Go out all other embodiments obtained under the premise of creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
Referring to Fig. 1, Fig. 1 shows that the present invention applies the block diagram of the electronic equipment 100 of example offer.Of the invention real
It applies in example, electronic equipment 100 may be, but not limited to, smart mobile phone, tablet computer, above-knee pocket computer, vehicle-mounted computer, a
Personal digital assistant (personal digital assistant, PDA), wearable mobile terminal, desktop computer etc..The electronics
Equipment 100 includes memory 101, processor 102, Peripheral Interface 103, wind detection device 104, display device 105 and wind-tunnel
Test segment length determining device 200.
The memory 101, processor 102, Peripheral Interface 103, wind detection device 104 and display device 105 are each
It is directly or indirectly electrically connected between element, to realize the transmission of data or interaction.Such as these elements can lead between each other
It crosses one or more communication bus or signal wire is realized and is electrically connected.The wind tunnel test segment length determining device 200 is included extremely
Few one can be stored in the memory 101 or be solidificated in the electronics in the form of software or firmware (firmware) and set
Software function module in standby 100 operating system (operation system, OS).The processor 102 is deposited for performing
The executable module or computer program stored in reservoir 101, such as the wind tunnel test segment length determining device 200 include
Software function module or computer program.
Wherein, memory 101 may be, but not limited to, random access memory 101 (Random Access Memory,
RAM), read-only memory 101 (Read Only Memory, ROM), 101 (Programmable of programmable read only memory
Read-Only Memory, PROM), (the Erasable Programmable Read-Only of erasable read-only memory 101
Memory, EPROM), (the Electric Erasable Programmable Read-Only of electricallyerasable ROM (EEROM) 101
Memory, EEPROM) etc..For memory 101 for storing program, the processor 102 performs institute after execute instruction is received
Program is stated, the method performed by the server for the flow definition that any embodiment of the present invention is explained can be applied to processor 102
In or realized by processor 102.
Processor 102 can be a kind of integrated chip, have signal handling capacity.Above-mentioned processor 102 can be logical
With processor, including central processing unit (Central Processing Unit, CPU), network processing unit (Network
Processor, NP), speech processor and video processor etc.；It can also be digital processing unit, application-specific integrated circuit, scene
Programmable gate array either other programmable logic device, discrete gate or transistor logic, discrete hardware components.It can be with
Realize or perform each method, step and the logic diagram disclosed in the embodiment of the present invention.General processor can be microprocessor
Device or the processor can also be any conventional processors etc..
The Peripheral Interface 103 is used to various input/output devices being coupled to processor 102 and memory 101.
In some embodiments, Peripheral Interface 103 and processor 102 can be realized in one single chip.In some other example, they
It can be realized respectively by independent chip.
Wind detection device 104 is for acquiring image, and in embodiments of the present invention, wind detection device 104 can be pressure
Force snesor, such as piezoresistive force sensor, ceramic pressure sensor, diffusion silicon pressure sensor, sapphire pressure sensor
With piezoelectric pressure indicator etc..
Display device 105 is used to implement the interaction between user and electronic equipment 100, such as, but not limited to display device
105 can show the encrypted image after image encryption.
In embodiments of the present invention, wind-tunnel of the wind tunnel test segment length determining device 200 needed for for determining design wind-tunnel
Segment length is tested, image encryption can be realized by the following method in wind tunnel test segment length determining device 200.
Referring to Fig. 2, Fig. 2 shows a kind of wind tunnel test segment length provided in an embodiment of the present invention to determine method flow
Figure.In embodiments of the present invention, wind tunnel test segment length determines that method includes step S100~step S800.Below to step
S100~step S800 is described in detail.
Step S100：Obtain wind data and vehicle vehicle model.
In embodiments of the present invention, wind data can be collected by wind detection device 104.Vehicle vehicle model
It can be generated or manually entered by electronic equipment 100.In embodiments of the present invention, vehicle vehicle model can be vehicle vehicle
The electronic model of data or vehicle vehicle, such as size, resistance to compression maximum value etc..During wind data need simulate think wind-tunnel or
The data of wind-force are injected in person's Free Flow Field, for example, the speed of wind-force, the intensity of wind-force, pressure of wind-force etc..
Step S200：Wind data is inputted respectively in preset multiple simulation wind tunnel models, obtain multiple non-placement vehicles
When wind tunnel test section in pressure distribution, wherein, multiple simulation wind tunnel models are according to multiple wind tunnel test segment length of setting
Value structure obtains.
In embodiments of the present invention, wind data is inputted respectively in preset multiple simulation wind tunnel models, can simulated
When obtaining wind-tunnel and not being placed in vehicle, it is distributed to the pressure of blasting.
In embodiments of the present invention, it is built to obtain multiple simulation wind-tunnel moulds according to multiple wind tunnel test length values of setting
The step of type, including：1. the multiple wind tunnel test length values of setting.There are many settings of multiple wind tunnel test length values, example
As multiple wind tunnel test length values are respectively：15m, 17m, 18m, 19m etc., but the setting of multiple wind tunnel test length values is not
It is limited to this.2. multiple simulation wind tunnel models are built respectively according to multiple wind tunnel test length values, wherein, a wind tunnel test section
Length value corresponds to a simulation wind tunnel model, and wind tunnel test length value is the significant dimensions parameter for simulating wind tunnel model.Pass through
Using above scheme, the simulation wind-tunnel of multiple and different sizes can be built.
Step S300：By in the multiple simulation wind tunnel models of wind data and vehicle vehicle mode input, obtain and multiple wind
The corresponding multigroup simulation wind-tunnel vehicle coefficient of hole test length value.
It in embodiments of the present invention, can be with by the multiple simulation wind tunnel models of wind data and vehicle vehicle mode input
Simulation in vehicle performance test or experiment, vehicle is put into wind-tunnel, the scene being detected, for example, can simulate by
Vehicle is put into wind-tunnel, is thought that vehicle is dried, is monitored the compressive property to wind-force of vehicle.By wind data and vehicle vehicle model
In one simulation wind tunnel model of input, one group of simulation wind-tunnel vehicle coefficient can be obtained.By wind data and vehicle vehicle model
It inputs in simulation wind tunnel model corresponding from different wind tunnel test length values, can obtain and multiple wind tunnel test segment lengths respectively
The corresponding multigroup simulation wind-tunnel vehicle coefficient of angle value.
In embodiments of the present invention, each group of simulation wind-tunnel vehicle coefficient include simulation wind-tunnel vehicle surface pressure distribution,
Simulate wind-tunnel vehicle pneumatic drag coefficient and simulation wind-tunnel aerodynamic lift coefficient.Specific vehicle in wind-tunnel surface of vehicle by
Pressure distribution, vehicle launch lift coefficient point can in wind-tunnel for the pneumatic drag coefficient of vehicle of the vehicle in wind-tunnel and vehicle
To simulate to obtain by the way that wind data and vehicle vehicle mode input are simulated wind tunnel model.Specifically, by wind data and vehicle
In vehicle mode input simulation wind tunnel model, simulation wind-tunnel vehicle surface corresponding with wind tunnel test length value is obtained
Pressure distribution, simulation wind-tunnel vehicle pneumatic drag coefficient and simulation wind-tunnel aerodynamic lift coefficient can represent table vehicle in wind respectively
The pressure that surface of vehicle is subject in hole is distributed, the pneumatic drag coefficient of vehicle of the vehicle in wind-tunnel and the vehicle vehicle in wind-tunnel
Aerodynamic lift coefficient.
Step S400：When in the Free Flow Field model that pre-establishes of wind data input, will not be placed vehicle from
It is distributed by fluid field pressure.
In embodiments of the present invention, it in Free Flow Field model wind data input pre-established, can simulate to obtain
Pressure distribution situation during vehicle is not put into Free Flow Field.
Step S500：By in wind data and vehicle vehicle mode input Free Flow Field model, Free Flow Field vehicle is obtained
Coefficient.
In embodiments of the present invention, Free Flow Field vehicle coefficient includes Free Flow Field vehicle surface pressure distribution, free flow
Field vehicle pneumatic drag coefficient and Free Flow Field aerodynamic lift coefficient.The pressure that vehicle surface of vehicle in Free Flow Field is subject to point
The pneumatic drag coefficient and vehicle of the vehicle of cloth, vehicle in wind-tunnel vehicle launch lift coefficient in wind-tunnel can pass through respectively
It is obtained being simulated in wind data and vehicle vehicle mode input Free Flow Field model, specifically, by wind data and vehicle vehicle
In type mode input Free Flow Field model, with the Free Flow Field vehicle surface pressure distribution of Free Flow Field model output, free flow
Field vehicle pneumatic drag coefficient and Free Flow Field aerodynamic lift coefficient represent to represent meter for vehicle of the vehicle in Free Flow Field respectively
The pressure distribution in face, aerodynamic lift coefficient of pneumatic drag coefficient and vehicle of the vehicle in Free Flow Field in Free Flow Field.
In embodiments of the present invention, it by wind data and vehicle vehicle mode input Free Flow Field model, can simulate
Go out to put on vehicle the scene of vehicle when people's Free Flow Field dries to vehicle, can test to obtain and vehicle is put into people's Free Flow Field to vehicle
Blowing when vehicle scene in vehicle pressure distribution.
In embodiments of the present invention, step S200, the executive mode of step S300, step S400 and step S500 are not limited to
Step S200, step S300, step S400, step S500 can also be step S400, step S500, step S200, step
S300；Step S200, step S400, step S500, step S300；Step S400, step S200, step S300, step S500
Deng.
By using above scheme, the simulation wind tunnel model of simulation and Free Flow Field model can be established, and pass through wind
In force data input simulation wind tunnel model and Free Flow Field model, the environment that wind-force is injected in wind-tunnel and Free Flow Field is simulated, into
One step, it can simulate to obtain the pressure point when not having the vehicle to be only injected into wind-force equal with wind data in wind-tunnel and Free Flow Field
Cloth, specifically, the pressure point when simulation obtains not having in wind-tunnel and Free Flow Field vehicle and injects wind-force equal with wind data
Cloth is pressure distribution and the distribution of Free Flow Field pressure in wind tunnel test section respectively.It can be by by wind data and vehicle vehicle mould
In type input simulation wind tunnel model and Free Flow Field model, it can simulate and be placed in simulation wind tunnel model and Free Flow Field model
Vehicle and injecting is distributed with the pressure of vehicle during wind data equal wind-force, you can obtains needing the vehicle performance detected with simulation
Data, specifically, vehicle when simulation obtains merging vehicle in wind-tunnel and Free Flow Field and injects wind-force equal with wind data
Performance data is simulation wind-tunnel vehicle coefficient and Free Flow Field vehicle coefficient respectively.
Step S600：According to it is multiple do not place vehicle when wind tunnel test section in pressure distribution and when not placing vehicle from
It is distributed by fluid field pressure, obtains multiple wind tunnel model adaptive values.
In embodiments of the present invention, the specific embodiment of step S600 may be, but not limited to,：Each is asked for not put
The difference that Free Flow Field pressure when pressure is distributed and does not place vehicle in wind tunnel test section when putting vehicle is distributed.It is in this way, multiple
In wind tunnel test section when not placing vehicle pressure be distributed with do not place vehicle when Free Flow Field pressure distribution can obtain with
Pressure distribution corresponding multiple pressure distributions are poor in multiple wind tunnel test sections when not placing vehicle, and the distribution of each pressure is poor right
Answer an above-mentioned simulation wind tunnel model.Using multiple pressure differentials as multiple wind tunnel model adaptive values, then obtain and multiple simulations
Wind tunnel model multiple wind tunnel model adaptive values correspondingly.
Step S700：According to multigroup simulation wind-tunnel vehicle coefficient and Free Flow Field vehicle coefficient, multiple auto models are obtained
Adaptive value.
In embodiments of the present invention, step S700 includes step S710 and step S720.Referring to Fig. 3, Fig. 3 shows step
The flow chart of rapid S700.Step S710 and step S720 are described in detail below.
Step S710：Each group of simulation wind-tunnel vehicle surface pressure distribution, simulation wind-tunnel vehicle aerodynamic drag are calculated respectively
Coefficient and simulation wind-tunnel aerodynamic lift coefficient and Free Flow Field vehicle surface pressure distribution, Free Flow Field vehicle pneumatic drag coefficient
With the difference of Free Flow Field aerodynamic lift coefficient, it is poor to respectively obtain poor pressure distribution, resistance coefficient difference and lift coefficient.Each group of mould
Intend wind-tunnel vehicle surface pressure distribution, simulation wind-tunnel vehicle pneumatic drag coefficient and simulation wind-tunnel aerodynamic lift coefficient and correspond to one group
Pressure distribution is poor, resistance coefficient difference and lift coefficient are poor.
Step S720：Pressure distribution the sum of poor, resistance coefficient difference and lift coefficient difference are asked for, obtains auto model adaptation
Value.Each group of simulation wind-tunnel vehicle coefficient corresponds to an auto model adaptive value.In this way, pass through multigroup simulation wind-tunnel vehicle coefficient
Multiple auto model adaptive values can be obtained with Free Flow Field vehicle coefficient.
Step S800：According to multiple wind tunnel model adaptive values and multiple auto model adaptive values, obtain needed for design wind-tunnel
Wind tunnel test segment length.
As a kind of embodiment, step S800 includes step S810 and step S820, referring to Fig. 4, Fig. 4 shows step
The flow chart of rapid S800.Step S810 and step S820 are described in detail below.
Step S810：According to multiple wind tunnel model adaptive values and multiple auto model adaptive values, one or more is obtained
Preparation wind tunnel test segment length.
As a kind of embodiment, step S810 includes step S811, step S812 and step S813.Referring to Fig. 5, figure
5 show the flow chart of step S810.Step S811, step S812 and step S813 are described in detail below.
Step S811：Judge whether auto model adaptive value is less than preset value.Preset value is pre- in embodiments of the present invention
First set.Auto model adaptive value is smaller, then illustrates the corresponding vehicle vehicle model of the auto model adaptive value in the vehicle
The performance test parameter of the corresponding simulation wind tunnel model of model adaptive value is closer to the corresponding vehicle vehicle of auto model adaptive value
Model is in the performance test parameter of the corresponding Free Flow Field model of the auto model adaptive value.
Step S812：When auto model adaptive value is less than preset value, the corresponding wind-tunnel mould of auto model adaptive value is judged
Whether type adaptive value is less than setting value.In embodiments of the present invention, setting value is preset.Wind tunnel model adaptive value is got over
It is small, then illustrate that the difference of the corresponding simulation wind tunnel model and Free Flow Field model of the wind tunnel model adaptive value is smaller.
Step S813：When the corresponding wind tunnel model adaptive value of the auto model adaptive value is less than setting value, with the wind-tunnel
Preparation wind tunnel test segment length of the corresponding wind tunnel test length value of model adaptive value needed for as design wind-tunnel.There are multiple vehicles
Model adaptive value and multiple wind tunnel model adaptive values, in this way, one or more preparation wind tunnel test segment length can be obtained.
When multiple auto model adaptive values and corresponding multiple wind tunnel model adaptive values are all unsatisfactory for auto model and fit
It should be worth and be less than setting value less than preset value and the corresponding wind tunnel model adaptive value of the auto model adaptive value, then need to set again
Determine preset value and setting value.Step S811~step S813 is performed again.
Step S820：Judge whether the quantity of preparation wind tunnel test segment length is more than 1, as the prepared wind tunnel test segment length
The quantity of degree is more than 1, using the wind tunnel test needed for the minimum value of the multiple prepared wind tunnel test segment length as design wind-tunnel
Segment length；When the quantity of the prepared wind tunnel test segment length is no more than 1, then the prepared wind tunnel test segment length is as design
Wind tunnel test segment length needed for wind-tunnel.
By using above scheme, this method can be obtained accurately, suitable for testing or testing vehicle vehicle model
Wind tunnel test segment length needed for the required design wind-tunnel of corresponding vehicle.By using the mode of electronic simulation, to simulate wind
Wind-tunnel and Free Flow Field in hole model and Free Flow Field modeling reality can simulate the field that performance detection is carried out to vehicle
Scape, test obtains carrying out vehicle the parameter needed for the scene of performance detection, so as to obtain accurately to vehicle progressive
Wind tunnel test segment length needed for testing needed for design wind-tunnel, it is simple and convenient, it is time saving and energy saving, cost is saved, it is efficient, accurately
Property it is high.
Referring to Fig. 6, Fig. 6 shows the frame structure signal of the wind tunnel test segment length determining device 200 described in Fig. 1
Figure.In embodiments of the present invention, a kind of wind tunnel test segment length determining device 200 includes obtaining test data module 210, test
Empty tunnel pressure distribution module 220, test simulation wind-tunnel vehicle pressure coefficient module 230, the empty Free Flow Field pressure distribution of test
Module 240, obtains wind tunnel model adaptive value module 260, obtains vehicle mould test Free Flow Field vehicle pressure coefficient module 250
Type adaptive value module 270 and acquisition design tunnel coefficient module 280.Obtain test data module 210, the empty tunnel pressure point of test
Cloth module 220, test simulation wind-tunnel vehicle pressure coefficient module 230, the empty Free Flow Field pressure distribution module 240 of test, test
Free Flow Field vehicle pressure coefficient module 250 obtains wind tunnel model adaptive value module 260, obtains auto model adaptive value module
270 are sequentially connected with design tunnel coefficient module 280 is obtained.The mould included below to wind tunnel test segment length determining device 200
Block is described in detail.
Test data module 210 is obtained, for obtaining wind data and vehicle vehicle model, wind data and vehicle will be obtained
Vehicle model is sent to the empty tunnel pressure distribution module 220 of test.In embodiments of the present invention, test data module is obtained
210 can be used for performing above-mentioned steps S100, and content described in above-mentioned steps S100 is suitable for obtaining test data module 210,
This is repeated no more.
The empty tunnel pressure distribution module 220 of test, for wind data to be inputted to preset multiple simulation wind-tunnel moulds respectively
In type, pressure distribution in multiple wind tunnel test sections when not placing vehicle is obtained, wherein, multiple simulation wind tunnel models are according to setting
Multiple wind tunnel test length values build to obtain.In embodiments of the present invention, testing empty tunnel pressure distribution module 220 can be with
For performing above-mentioned steps S200, content described in above-mentioned steps S200 is suitable for the empty tunnel pressure distribution module 220 of test, herein
It repeats no more.
Test simulation wind-tunnel vehicle pressure coefficient module 230, for wind data and vehicle vehicle mode input is multiple
It simulates in wind tunnel model, obtains multigroup simulation wind-tunnel vehicle coefficient corresponding with multiple wind tunnel test length values.At this
In inventive embodiments, test simulation wind-tunnel vehicle pressure coefficient module 230 can be used for performing above-mentioned steps S300, above-mentioned steps
Content described in S300 is suitable for test simulation wind-tunnel vehicle pressure coefficient module 230, and details are not described herein.
The empty Free Flow Field pressure distribution module 240 of test, for the Free Flow Field mould for pre-establishing wind data input
In type, Free Flow Field pressure distribution during vehicle is not placed.In embodiments of the present invention, empty Free Flow Field pressure point is tested
Cloth module 240 can be used for performing above-mentioned steps S400, and content described in above-mentioned steps S400 is suitable for the empty Free Flow Field pressure of test
Power distribution module 240, details are not described herein.
Free Flow Field vehicle pressure coefficient module 250 is tested, for will be described in wind data and vehicle vehicle mode input
In Free Flow Field model, Free Flow Field vehicle coefficient is obtained.In embodiments of the present invention, Free Flow Field vehicle pressure coefficient is tested
Module 250 can be used for performing above-mentioned steps S500, and content described in above-mentioned steps S500 is suitable for test Free Flow Field vehicle pressure
Force coefficient module 250, details are not described herein.
Obtain wind tunnel model adaptive value module 260, for according to it is multiple do not place vehicle when wind tunnel test section in pressure
Distribution is distributed with Free Flow Field pressure when not placing vehicle, obtains multiple wind tunnel model adaptive values.In embodiments of the present invention,
It obtains wind tunnel model adaptive value module 260 to can be used for performing step S600, content described in above-mentioned steps S600 is suitable for obtaining
Wind tunnel model adaptive value module 260, details are not described herein.
Auto model adaptive value module 270 is obtained, for according to multigroup simulation wind-tunnel vehicle coefficient and Free Flow Field vehicle
Coefficient obtains multiple auto model adaptive values.In embodiments of the present invention, obtaining auto model adaptive value module 270 can use
In performing above-mentioned steps S700, content described in above-mentioned steps S700 is suitable for obtaining auto model adaptive value module 270, herein not
It repeats again.
Referring to Fig. 7, Fig. 7 shows the frame structure schematic diagram for obtaining auto model adaptive value module 270.In the present invention
In embodiment, obtain auto model adaptive value module 270 and include asking for coefficient difference unit 271 and obtain auto model adaptive value list
Member 272.It asks for coefficient difference unit 271 and is connect with obtaining auto model adaptation value cell 272.Below to asking for coefficient difference unit
271 are described in detail with auto model adaptation value cell 272 is obtained.
Coefficient difference unit 271 is asked for, for calculating each group of simulation wind-tunnel vehicle surface pressure distribution, simulation wind-tunnel respectively
Vehicle pneumatic drag coefficient and simulation wind-tunnel aerodynamic lift coefficient and Free Flow Field vehicle surface pressure distribution, Free Flow Field vehicle
The difference of pneumatic drag coefficient and Free Flow Field aerodynamic lift coefficient respectively obtains poor pressure distribution, resistance coefficient difference and lift system
Number is poor.In embodiments of the present invention, coefficient difference unit 271 is asked for can be used for described in execution step S710, above-mentioned steps S710
Content is suitable for asking for coefficient difference unit 271, and details are not described herein.
It obtains auto model and adapts to value cell 272, be distributed poor, resistance coefficient difference and lift coefficient difference for asking for pressure
With auto model adaptive value is obtained, in this way, the multigroup simulation wind-tunnel vehicle coefficient and Free Flow Field vehicle coefficient, obtains more
A auto model adaptive value.In embodiments of the present invention, auto model adaptation value cell 272 is obtained to can be used for performing step
S720, content described in above-mentioned steps S720 are suitable for obtaining auto model adaptation value cell 272, and details are not described herein.
Design tunnel coefficient module 280 is obtained, for according to multiple wind tunnel model adaptive values and the adaptation of multiple auto models
Value obtains the wind tunnel test segment length needed for design wind-tunnel.In embodiments of the present invention, design tunnel coefficient module 280 is obtained
Can be used for performing above-mentioned steps S800, content described in above-mentioned steps S800 is suitable for obtaining design tunnel coefficient module 280,
This is repeated no more.
Referring to Fig. 8, Fig. 8 shows the frame structure schematic diagram for obtaining design tunnel coefficient module 280, of the invention real
It applies in example, obtains design tunnel coefficient module 280 and include obtaining preparation coefficient elements 281, judge processing units 282 and determine to set
Count tunnel coefficient unit 283.Obtain preparation and coefficient elements 281 and judge that processing units 282 are connect, judge processing units 282 and
Determine that design tunnel coefficient unit 283 connects.
Preparation coefficient elements 281 are obtained, for according to multiple wind tunnel model adaptive values and multiple auto model adaptive values, obtaining
To one or more preparation wind tunnel test segment length.In embodiments of the present invention, preparation coefficient elements 281 are obtained to can be used for
Above-mentioned steps S810 is performed, content described in above-mentioned steps S810 is suitable for obtaining preparation coefficient elements 281, and details are not described herein.
Referring to Fig. 9, Fig. 9 shows the frame structure schematic diagram for obtaining preparation coefficient elements 281.In the embodiment of the present invention
In, it obtains preparation coefficient elements 281 and includes the first judgment sub-unit 2811, the second judgment sub-unit 2812 and determine to take prepared system
Number subelement 2813.It first judgment sub-unit 2811, the second judgment sub-unit 2812 and determines to take prepared coefficient subelement 2813
It is sequentially connected.It to the first judgment sub-unit 2811, the second judgment sub-unit 2812 and determines to take prepared coefficient subelement below
2813 are illustrated.
First judgment sub-unit 2811, for judging whether auto model adaptive value is less than preset value.Implement in the present invention
In example, the first judgment sub-unit 2811 can be used for performing step S811, and content described in above-mentioned steps S811 is sentenced suitable for first
Disconnected subelement 2811, details are not described herein.
Second judgment sub-unit 2812, for when auto model adaptive value is less than preset value, judging that auto model adapts to
It is worth whether corresponding wind tunnel model adaptive value is less than setting value.In embodiments of the present invention, the second judgment sub-unit 2812 can be with
For performing step S812, content described in above-mentioned steps S812 is suitable for the second judgment sub-unit 2812, and details are not described herein.
It determines to take prepared coefficient subelement 2813, be less than for working as the corresponding wind tunnel model adaptive value of auto model adaptive value
During setting value, surveyed using the preparation wind-tunnel needed for the corresponding wind tunnel test length value of the wind tunnel model adaptive value as design wind-tunnel
Try segment length；In this way, obtain one or more preparation wind tunnel test segment length.In embodiments of the present invention, it determines to take preparation
Coefficient subelement 2813 can be used for performing step S813, and content described in above-mentioned steps S813 is suitable for determining to take prepared coefficient
Unit 2813, details are not described herein.
Processing units 282 are judged, for judging whether the quantity of the prepared wind tunnel test segment length is more than 1.In this hair
In bright embodiment, judge that processing units 282 can be used for performing step S820, content described in above-mentioned steps S820 is suitable for judging number
Unit 282 is measured, details are not described herein.
Design tunnel coefficient unit 283 is determined, for when the quantity of preparation wind tunnel test segment length is more than 1, with multiple
Wind tunnel test segment length of the minimum value of preparation wind tunnel test segment length needed for as design wind-tunnel；As preparation wind tunnel test segment length
When the quantity of degree is not more than 1, then wind tunnel test segment length of the wind tunnel test segment length needed for as design wind-tunnel is prepared.In this hair
In bright embodiment, determine that design tunnel coefficient unit 283 can be used for performing step S830, content described in above-mentioned steps S830 is applicable in
In determining design tunnel coefficient unit 283, details are not described herein.
In conclusion an embodiment of the present invention provides a kind of wind tunnel test segment length to determine method, apparatus and electronic equipment,
First by inputting wind data respectively in preset multiple simulation wind tunnel models, multiple wind-tunnel when not placing vehicle are obtained
Pressure is distributed in test section, wherein, multiple simulation wind tunnel models build to obtain according to multiple wind tunnel test length values of setting,
By in the multiple simulation wind tunnel models of wind data and vehicle vehicle mode input, obtain distinguishing with multiple wind tunnel test length values
Corresponding multigroup simulation wind-tunnel vehicle coefficient, wind data is inputted in the Free Flow Field model pre-established, is not placed
Free Flow Field pressure distribution during vehicle, by Free Flow Field model described in wind data and the vehicle vehicle mode input,
Obtain Free Flow Field vehicle coefficient, then according to it is multiple do not place vehicle when wind tunnel test section in pressure distribution and non-placement vehicle
When the distribution of Free Flow Field pressure, multiple wind tunnel model adaptive values are obtained, according to multigroup simulation wind-tunnel vehicle coefficient and freedom
Flow field vehicle coefficient obtains multiple auto model adaptive values, finally according to multiple wind tunnel model adaptive values and multiple auto models
Adaptive value obtains the wind tunnel test segment length needed for design wind-tunnel, designs the wind tunnel test segment length needed for wind-tunnel and setting
Multiple wind tunnel test length values correspond to.This method can be obtained accurately, suitable for testing or testing vehicle vehicle model
Wind tunnel test segment length needed for the required design wind-tunnel of corresponding vehicle.By using the mode of electronic simulation, to simulate wind
Wind-tunnel and Free Flow Field in hole model and Free Flow Field modeling reality can simulate the field that performance detection is carried out to vehicle
Scape, test obtains carrying out vehicle the parameter needed for the scene of performance detection, so as to obtain accurately to vehicle progressive
Wind tunnel test segment length needed for testing needed for design wind-tunnel, it is simple and convenient, it is time saving and energy saving, cost is saved, it is efficient, accurately
Property it is high.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flow chart or block diagram can represent the one of a module, program segment or code
Part, a part for the module, program segment or code include one or more and are used to implement holding for defined logic function
Row instruction.It should also be noted that at some as in the realization method replaced, the function that is marked in box can also be to be different from
The sequence marked in attached drawing occurs.For example, two continuous boxes can essentially perform substantially in parallel, they are sometimes
It can perform in the opposite order, this is depended on the functions involved.It is it is also noted that every in block diagram and/or flow chart
The combination of a box and the box in block diagram and/or flow chart can use function or the dedicated base of action as defined in performing
It realizes or can be realized with the combination of specialized hardware and computer instruction in the system of hardware.
In addition, each function module in each embodiment of the present invention can integrate to form an independent portion
Point or modules individualism, can also two or more modules be integrated to form an independent part.
If the function is realized in the form of software function module and is independent product sale or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention is substantially in other words
The part contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, is used including some instructions so that a computer equipment (can be
People's computer, server or network equipment etc.) perform all or part of the steps of the method according to each embodiment of the present invention.
It should be noted that herein, relational terms such as first and second and the like are used merely to an entity or behaviour
Make with another entity or operate distinguish, without necessarily requiring or implying between these entities or operation there are it is any this
Kind practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to nonexcludability
Include so that process, method, article or equipment including a series of elements not only include those elements, but also
Including other elements that are not explicitly listed or further include for this process, method, article or equipment it is intrinsic will
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that wanted including described
Also there are other identical elements in the process of element, method, article or equipment.
Claims (10)
1. a kind of wind tunnel test segment length determines method, which is characterized in that the method includes：
Obtain wind data and vehicle vehicle model；
The wind data is inputted respectively in preset multiple simulation wind tunnel models, obtains multiple wind-tunnel when not placing vehicle
Pressure is distributed in test section, wherein, the multiple simulation wind tunnel model is built according to multiple wind tunnel test length values of setting
It obtains；
Will the wind data and the vehicle vehicle mode input it is the multiple simulation wind tunnel model in, obtain with it is the multiple
The corresponding multigroup simulation wind-tunnel vehicle coefficient of wind tunnel test length value；
In the Free Flow Field model that wind data input is pre-established, Free Flow Field pressure during vehicle is not placed
Distribution；
By in Free Flow Field model described in the wind data and the vehicle vehicle mode input, Free Flow Field vehicle system is obtained
Number；
According to it is the multiple do not place vehicle when wind tunnel test section in pressure distribution and it is described do not place vehicle when free flow
Field pressure distribution, obtains multiple wind tunnel model adaptive values；
According to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle coefficient, obtain multiple auto models and adapt to
Value；
According to the multiple wind tunnel model adaptive value and the multiple auto model adaptive value, the wind-tunnel needed for design wind-tunnel is obtained
Test segment length.
2. wind tunnel test segment length according to claim 1 determines method, which is characterized in that is not placed according to the multiple
Pressure distribution and Free Flow Field pressure distribution when not placing vehicle, obtain multiple wind-tunnel in wind tunnel test section during vehicle
The step of model adaptive value, including：
In wind tunnel test section when asking for not placing vehicle described in each pressure distribution with it is described do not place vehicle when freedom
The difference of fluid field pressure distribution, in this way, it is poor to obtain multiple pressure distributions；
Using the multiple pressure differential as multiple wind tunnel model adaptive values.
3. wind tunnel test segment length according to claim 2 determines method, which is characterized in that the simulation wind-tunnel vehicle system
Number includes simulating wind-tunnel vehicle surface pressure distribution, simulation wind-tunnel vehicle pneumatic drag coefficient and simulation wind-tunnel aerodynamic lift system
Number；
The Free Flow Field vehicle coefficient includes Free Flow Field vehicle surface pressure distribution, Free Flow Field vehicle pneumatic drag coefficient
With Free Flow Field aerodynamic lift coefficient；
According to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle coefficient, multiple auto model adaptive values are obtained
The step of, including：
Calculate respectively simulated described in each group wind-tunnel vehicle surface pressure distribution, the simulation wind-tunnel vehicle pneumatic drag coefficient and
The simulation wind-tunnel aerodynamic lift coefficient is pneumatically hindered with the Free Flow Field vehicle surface pressure distribution, the Free Flow Field vehicle
The difference of force coefficient and the Free Flow Field aerodynamic lift coefficient respectively obtains poor pressure distribution, resistance coefficient difference and lift coefficient
Difference；
Pressure distribution the sum of poor, the described resistance coefficient difference and the lift coefficient difference are asked for, obtains auto model adaptive value；
It is adapted in this way, obtaining multiple auto models by multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle coefficient
Value.
4. wind tunnel test segment length according to claim 3 determines method, which is characterized in that according to the multiple wind-tunnel mould
Type adaptive value and the multiple auto model adaptive value, the step of obtaining designing the wind tunnel test segment length needed for wind-tunnel, including：
According to the multiple wind tunnel model adaptive value and the multiple auto model adaptive value, one or more preparation wind is obtained
Segment length is tested in hole；
Judge whether the quantity of the prepared wind tunnel test segment length is more than 1, when the quantity of the prepared wind tunnel test segment length
More than 1, using the wind tunnel test segment length needed for the minimum value of the multiple prepared wind tunnel test segment length as design wind-tunnel；
When the quantity of the prepared wind tunnel test segment length is no more than 1, then the prepared wind tunnel test segment length is as design wind
Wind tunnel test segment length needed for hole.
5. wind tunnel test segment length according to claim 4 determines method, which is characterized in that according to the multiple wind-tunnel mould
Type adaptive value and the multiple auto model adaptive value obtain the step of one or more prepares wind tunnel test segment length, packet
It includes：
Judge whether the auto model adaptive value is less than preset value；
When the auto model adaptive value is less than preset value, the corresponding wind tunnel model of the auto model adaptive value is judged
Whether adaptive value is less than setting value；
When the corresponding wind tunnel model adaptive value of the auto model adaptive value is less than setting value, with wind tunnel model this described
Preparation wind tunnel test segment length of the corresponding wind tunnel test length value of adaptive value needed for as design wind-tunnel；
In this way, obtain one or more preparation wind tunnel test segment length.
6. a kind of wind tunnel test segment length determining device, which is characterized in that described device includes：
Test data module is obtained, for obtaining wind data and vehicle vehicle model；
The empty tunnel pressure distribution module of test, for the wind data to be inputted preset multiple simulation wind tunnel models respectively
In, pressure distribution in multiple wind tunnel test sections when not placing vehicle is obtained, wherein, the multiple simulation wind tunnel model is according to setting
The multiple wind tunnel test length values put build to obtain；
Test simulation wind-tunnel vehicle pressure coefficient module, for will be described in the wind data and the vehicle vehicle mode input
In multiple simulation wind tunnel models, multigroup simulation wind-tunnel vehicle system corresponding with the multiple wind tunnel test length value is obtained
Number；
The empty Free Flow Field pressure distribution module of test, for the Free Flow Field model for pre-establishing wind data input
In, Free Flow Field pressure distribution during vehicle is not placed；
Free Flow Field vehicle pressure coefficient module is tested, for will be described in the wind data and the vehicle vehicle mode input
In Free Flow Field model, Free Flow Field vehicle coefficient is obtained；
Obtain wind tunnel model adaptive value module, for according to it is the multiple do not place vehicle when wind tunnel test section in pressure be distributed
With it is described do not place vehicle when the distribution of Free Flow Field pressure, obtain multiple wind tunnel model adaptive values；
Auto model adaptive value module is obtained, for according to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle
Coefficient obtains multiple auto model adaptive values；
Design tunnel coefficient module is obtained, for according to the multiple wind tunnel model adaptive value and the adaptation of the multiple auto model
Value obtains the wind tunnel test segment length needed for design wind-tunnel.
7. wind tunnel test segment length determining device according to claim 6, which is characterized in that the acquisition auto model is fitted
Module should be worth to include：
Coefficient difference unit is asked for, wind-tunnel vehicle surface pressure distribution, the simulation wind are simulated described in each group for calculating respectively
Hole vehicle pneumatic drag coefficient and the simulation wind-tunnel aerodynamic lift coefficient and the Free Flow Field vehicle surface pressure distribution, institute
State the difference of Free Flow Field vehicle pneumatic drag coefficient and the Free Flow Field aerodynamic lift coefficient, respectively obtain pressure distribution it is poor,
Resistance coefficient difference and lift coefficient are poor；
It obtains auto model and adapts to value cell, be distributed poor, described resistance coefficient difference and the lift system for asking for the pressure
The sum of number difference, obtains auto model adaptive value, in this way, multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle system
Number, obtains multiple auto model adaptive values.
8. wind tunnel test segment length determining device according to claim 7, which is characterized in that described to obtain design wind-tunnel system
Digital-to-analogue block includes：
Preparation coefficient elements are obtained, for according to the multiple wind tunnel model adaptive value and the multiple auto model adaptive value,
Obtain one or more preparation wind tunnel test segment length；
Processing units are judged, for judging whether the quantity of the prepared wind tunnel test segment length is more than 1；
Determine design tunnel coefficient unit, for when the quantity of the prepared wind tunnel test segment length be more than 1 when, with the multiple
Wind tunnel test segment length of the minimum value of preparation wind tunnel test segment length needed for as design wind-tunnel；When the prepared wind tunnel test
When the quantity of segment length is not more than 1, then the prepared wind tunnel test segment length is as the wind tunnel test segment length designed needed for wind-tunnel
Degree.
9. wind tunnel test segment length determining device according to claim 8, which is characterized in that described to obtain preparation coefficient list
Member includes：
First judgment sub-unit, for judging whether the auto model adaptive value is less than preset value；
Second judgment sub-unit, for when the auto model adaptive value is less than preset value, judging that the auto model adapts to
It is worth whether the corresponding wind tunnel model adaptive value is less than setting value；
It determines to take prepared coefficient subelement, be less than for working as the corresponding wind tunnel model adaptive value of the auto model adaptive value
During setting value, using the preparation wind needed for the corresponding wind tunnel test length value of wind tunnel model adaptive value this described as design wind-tunnel
Segment length is tested in hole；In this way, obtain one or more preparation wind tunnel test segment length.
10. a kind of electronic equipment, which is characterized in that the electronic equipment includes：
Memory；
Processor, the processor are connect with the memory；And
Wind tunnel test segment length determining device, the wind tunnel test segment length determining device are stored in the memory and including one
A or multiple computer software function modules that can be performed by the processor, including：
Test data module is obtained, for obtaining wind data and vehicle vehicle model；
The empty tunnel pressure distribution module of test, for the wind data to be inputted preset multiple simulation wind tunnel models respectively
In, pressure distribution in multiple wind tunnel test sections when not placing vehicle is obtained, wherein, the multiple simulation wind tunnel model is according to setting
The multiple wind tunnel test length values put build to obtain；
Test simulation wind-tunnel vehicle pressure coefficient module, for will be described in the wind data and the vehicle vehicle mode input
In multiple simulation wind tunnel models, multigroup simulation wind-tunnel vehicle system corresponding with the multiple wind tunnel test length value is obtained
Number；
The empty Free Flow Field pressure distribution module of test, for the Free Flow Field model for pre-establishing wind data input
In, Free Flow Field pressure distribution during vehicle is not placed；
Free Flow Field vehicle pressure coefficient module is tested, for will be described in the wind data and the vehicle vehicle mode input
In Free Flow Field model, Free Flow Field vehicle coefficient is obtained；
Obtain wind tunnel model adaptive value module, for according to it is the multiple do not place vehicle when wind tunnel test section in pressure be distributed
With it is described do not place vehicle when the distribution of Free Flow Field pressure, obtain multiple wind tunnel model adaptive values；
Auto model adaptive value module is obtained, for according to multigroup simulation wind-tunnel vehicle coefficient and the Free Flow Field vehicle
Coefficient obtains multiple auto model adaptive values；
Design tunnel coefficient module is obtained, for according to the multiple wind tunnel model adaptive value and the adaptation of the multiple auto model
Value obtains the wind tunnel test segment length needed for design wind-tunnel.
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