CN112528413A - Method for calculating opening area of radiator effective grid based on star ccm + - Google Patents
Method for calculating opening area of radiator effective grid based on star ccm + Download PDFInfo
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- CN112528413A CN112528413A CN202011486377.4A CN202011486377A CN112528413A CN 112528413 A CN112528413 A CN 112528413A CN 202011486377 A CN202011486377 A CN 202011486377A CN 112528413 A CN112528413 A CN 112528413A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000013461 design Methods 0.000 claims abstract description 8
- 238000013499 data model Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 4
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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Abstract
The invention discloses a method for calculating the opening area of an effective grille of a radiator based on star ccm +, which is characterized by preparing a 3D data model according to the design conditions of a whole vehicle; converting data formats and classifying data, and classifying the plane of the radiator and other shielded parts into two categories; respectively setting boundary conditions for the two data classifications in the step two and solving to obtain an area S1 and an area S2; the air inlet area S is S1-S2 with the unit of mm2(ii) a S is the effective grille opening area of the radiator. The invention is a quick, efficient and accurate calculation method for the effective grille opening area of the radiator, and can provide effective constraint conditions for the early-stage concept design stage of a passenger vehicle.
Description
Technical Field
The invention relates to a method for calculating the opening area of an effective grille of a radiator based on star ccm +, belonging to the technical field of radiator design and detection.
Background
The internal flow resistance of the engine room is an important component of the wind resistance of the whole passenger car. The position and the size of the opening of the front grille of the automobile are effective means for controlling the resistance of the engine room. To meet the requirements of thermal management and low wind resistance, it is desirable to obtain an accurate positive frontal open area of the cooling module to achieve the earlier constraint on the grid open area.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a method for calculating the opening area of the radiator effective grille based on star ccm +, which is a quick, efficient and accurate method for calculating the opening area of the radiator effective grille and can provide effective constraint conditions for the early-stage conceptual design stage of a passenger vehicle.
The purpose of the invention is realized by the following technical scheme:
a method for calculating the effective grille opening area of a radiator based on star ccm + comprises the following steps:
step one, preparing a model: preparing a 3D data model according to the design conditions of the whole vehicle;
step two, data processing: converting data formats and classifying data, and classifying the plane of the radiator and other shielded parts into two categories;
step three, setting boundary conditions: respectively setting boundary conditions for the two data classifications in the step two and solving to obtain an area S1 and an area S2;
step four: area solving: the air inlet area S is S1-S2 with the unit of mm2(ii) a S is the effective grille opening area of the radiator.
Further, in the first step, the integrity of the following data is checked respectively: a front grille shutter assembly; a front bumper face shield assembly; a front anti-collision beam assembly; a front end frame assembly; an air deflector assembly; an engine cover lock bracket assembly; a cooling module assembly; a loudspeaker, various mounting brackets and the like.
Further, in the second step, all the data are converted into the data in the STL format through data format conversion.
Preferably, the data format conversion is converted by CATIA software and is imported into STAR CCM + software, and the file is stored as a.sim file.
Further, in the second step, the radiator plane is divided into one boundary _1 and other shielded components (divided into one boundary _ 2) by data classification.
Further, the setting of the boundary conditions in the third step specifically includes:
the first boundary condition is as follows: establishing a report _1 file, solving all data of objects, namely boundary _1 and boundary _2, by adopting a Frontal Area function, defining the Normal direction as the driving direction of the vehicle, and solving a report to obtain an Area S1;
and a second boundary condition: establishing a report _2 file, solving all data with a boundary _2 object by adopting a Frontal Area function, defining the Normal direction as the driving direction of the vehicle, and solving a report to obtain an Area S2.
The invention has the beneficial effects that:
1. the efficiency of calculation and solution is far higher than that of the traditional measurement and calculation mode;
2. the method is novel;
3. the operation is convenient and fast;
4. the precision is high.
In conclusion, the method for calculating the effective grille opening area of the radiator is rapid, efficient and accurate, and can provide effective constraint conditions for the early-stage concept design stage of the passenger vehicle.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic flow chart of the calculation of the method of the present invention;
fig. 2 is a schematic view of the effective grille opening area of the radiator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
As shown in FIG. 1, a method for calculating the effective grille opening area of a radiator based on star ccm + comprises the following steps:
(1) model preparation
Preparing a 3D data model according to the design conditions of the whole vehicle, and checking the data integrity by referring to the table 1, wherein the data integrity is not limited to the parts in the list and needs to be checked according to the actual condition;
TABLE 1 parts identification List
| Serial number | Component part | Integrity validation |
| 1 | Front air inlet grille assembly | Yes/no |
| 2 | Front bumper face guard assembly | Yes/no |
| 3 | Front anti-collision beam assembly | Yes/no |
| 4 | Front end frame assembly | Yes/no |
| 5 | Air deflector assembly | Yes/no |
| 6 | Engine cover lock bracket assembly | Yes/no |
| 7 | Cooling module assembly | Yes/no |
| 8 | Assembly of loudspeaker, various mounting brackets and the like | Yes/no |
(2) Data processing
The data format requires: all data is required to be converted into STL format data by means of CATIA software. And importing the file into STAR CCM + software, wherein the file is stored as a.sim file.
Data classification requirements: the radiator plane (radiator cooling module plane, corresponding to serial number 7 in table 1, i.e. cooling module assembly) needs to be separately divided into one boundary _1 (function in star ccm + software), and other shielded components (corresponding to other components except the cooling module assembly in table 1) need to be divided into one boundary _ 2.
(3) Boundary condition setting
The first boundary condition is as follows: establishing a report _1 file, solving all data with objects of boundary _1 and boundary _2 by adopting a Frontal Area function, defining the Normal direction as the driving direction of the vehicle, and solving a report to obtain an Area of S1.
And a second boundary condition: establishing a report _2 file, solving all data with a boundary _2 object by adopting a Frontal Area function, defining the Normal direction as the driving direction of the vehicle, and solving a report to obtain an Area S2.
(4) Area solution
The air inlet area S is S1-S2 with the unit of mm2. S is the effective grille opening area of the radiator.
Note: the effective grille opening area of the radiator provided by the invention is defined as follows: the total area of the grille opening portion projected to the radiator core (after all the shielding members in front of the radiator are removed) is taken as an angle (YZ plane) of a front view of the vehicle.
Advantage of star ccm + software: the method has the function of calculating the orthographic projection area, and is simple and direct.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method for calculating the opening area of an effective grille of a radiator based on star ccm + is characterized by comprising the following steps:
step one, preparing a model: preparing a 3D data model according to the design conditions of the whole vehicle;
step two, data processing: converting data formats and classifying data, and classifying the plane of the radiator and other shielded parts into two categories;
step three, setting boundary conditions: respectively setting boundary conditions for the two data classifications in the step two and solving to obtain an area S1 and an area S2;
step four: area solving: the air inlet area S is S1-S2 with the unit of mm2(ii) a S is the effective grille opening area of the radiator.
2. The method as claimed in claim 1, wherein in the first step, the following data are checked for completeness respectively: a front grille shutter assembly; a front bumper face shield assembly; a front anti-collision beam assembly; a front end frame assembly; an air deflector assembly; an engine cover lock bracket assembly; a cooling module assembly; loudspeaker, installing support assembly.
3. The method as claimed in claim 1, wherein in the second step, all data is converted into STL format data by data format conversion.
4. The method for calculating the effective grille opening area of a radiator based on STAR CCM + as claimed in claim 3, wherein the data format conversion is converted by CATIA software and is imported into STAR CCM + software, and the file is stored as a.sim file.
5. The method as claimed in claim 1, wherein in the second step, the radiator plane is divided into a boundary _1 and other shaded components (into a boundary _ 2) by data classification.
6. The method for calculating the effective grille opening area of a radiator based on star ccm + as claimed in claim 5, wherein the step three boundary condition setting specifically comprises:
the first boundary condition is as follows: establishing a report _1 file, solving all data with objects of boundary _1 and boundary _2 by adopting a FrontalArea function, defining the Normal direction as the driving direction of the vehicle, and solving a report to obtain an area S1;
and a second boundary condition: establishing a report _2 file, solving all data with a boundary _2 object by adopting a Frontal Area function, defining the Normal direction as the driving direction of the vehicle, and solving a report to obtain an Area S2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486377.4A CN112528413A (en) | 2020-12-16 | 2020-12-16 | Method for calculating opening area of radiator effective grid based on star ccm + |
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| CN202011486377.4A CN112528413A (en) | 2020-12-16 | 2020-12-16 | Method for calculating opening area of radiator effective grid based on star ccm + |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113065291A (en) * | 2021-03-31 | 2021-07-02 | 东风商用车有限公司 | Method and system for judging heat dissipation of water tank based on grating effect diagram |
| CN114169094A (en) * | 2021-11-29 | 2022-03-11 | 重庆长安汽车股份有限公司 | Method and system for calculating effective air intake area of front protection air intake grille |
| CN114564789A (en) * | 2022-01-28 | 2022-05-31 | 东风汽车集团股份有限公司 | Air inlet grille structure optimization design method based on shielding property |
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- 2020-12-16 CN CN202011486377.4A patent/CN112528413A/en active Pending
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| WO2008080991A1 (en) * | 2006-12-28 | 2008-07-10 | Robert Bosch Gmbh | Method for determining the cooling efficiency and method for determining a heat sink surface |
| CN103879276A (en) * | 2012-12-20 | 2014-06-25 | 北汽福田汽车股份有限公司 | Method for calculating effective ventilation area of front end protective device of vehicle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113065291A (en) * | 2021-03-31 | 2021-07-02 | 东风商用车有限公司 | Method and system for judging heat dissipation of water tank based on grating effect diagram |
| CN113065291B (en) * | 2021-03-31 | 2023-07-28 | 东风商用车有限公司 | Method and system for judging heat dissipation of water tank based on grid effect diagram |
| CN114169094A (en) * | 2021-11-29 | 2022-03-11 | 重庆长安汽车股份有限公司 | Method and system for calculating effective air intake area of front protection air intake grille |
| CN114169094B (en) * | 2021-11-29 | 2024-06-25 | 重庆长安汽车股份有限公司 | Method and system for calculating effective air inlet area of front-protection air inlet grille |
| CN114564789A (en) * | 2022-01-28 | 2022-05-31 | 东风汽车集团股份有限公司 | Air inlet grille structure optimization design method based on shielding property |
| CN114564789B (en) * | 2022-01-28 | 2024-09-13 | 东风汽车集团股份有限公司 | Air inlet grille structure optimization design method based on shielding property |
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