CN112966452A - Method for simulating airflow speed and pressure intensity of coating spray booth - Google Patents
Method for simulating airflow speed and pressure intensity of coating spray booth Download PDFInfo
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- CN112966452A CN112966452A CN202110262912.6A CN202110262912A CN112966452A CN 112966452 A CN112966452 A CN 112966452A CN 202110262912 A CN202110262912 A CN 202110262912A CN 112966452 A CN112966452 A CN 112966452A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007921 spray Substances 0.000 title claims abstract description 19
- 239000011248 coating agent Substances 0.000 title claims abstract description 10
- 238000000576 coating method Methods 0.000 title claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000003973 paint Substances 0.000 claims description 25
- 238000005507 spraying Methods 0.000 claims description 20
- 238000010422 painting Methods 0.000 claims description 16
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Mathematical Physics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a method for simulating airflow speed and pressure of a coating spray booth, which is operated based on SCDM (design description language), ICEM (Integrated Circuit) and Fluent software and comprises the following steps: performing 3D modeling based on SCDM; dividing a structure and a grid of a 3D model generated by SCDM based on ICEM; setting material properties of the grid structure generated by ICEM based on Fluent; setting boundary conditions of a model structure and a grid based on Fluent; performing subsequent processing based on Fluent; the method provides a simulation method of airflow speed and pressure intensity of a coating spray booth, and provides a means for checking a design structure for a designer; the porous medium parameters adopted by simulation are an equation fitted by a curve obtained by multiple simulation results, and the obtained results of the inertial resistance coefficient and the viscous resistance coefficient are more accurate; the simulation can be rapidly carried out for many times by modifying the parameters, and the structure can be checked; the change cloud picture of the speed and the pressure of any surface can be obtained, the result is more visual, and the designer can conveniently refer to and change the design.
Description
Technical Field
The invention relates to the field of airflow speed and pressure intensity simulation of a coating and painting room, in particular to a method for simulating airflow speed and pressure intensity of the coating and painting room.
Background
The flowing condition of air flow in a painting spray booth has great influence on the painting effect of a vehicle body, the current control on the air flow of the painting spray booth is generally adjusted according to the specific conditions of a site through experience of a designer and a project manager, the structural design of the painting spray booth cannot be changed in time through the air flow speed and the pressure of a visual three-dimensional model, and the method can greatly consume manpower, material resources and financial resources and is not easy to control. Therefore, the research on a simulation method for the air flow speed and the pressure of the painting booth is important for the design of the painting booth.
Disclosure of Invention
The invention aims to provide a method for simulating the air flow speed and the pressure of a coating and painting room, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a simulation method for airflow speed and pressure of a coating and painting booth is operated based on SCDM (design description language), ICEM (Integrated Circuit engineering) and Fluent software and comprises the following steps:
step 2, dividing a structure and a grid of a 3D model generated by SCDM based on ICEM;
step 3, setting material properties of the grid structure generated by the ICEM based on Fluent;
step 4, setting the boundary conditions of the grid based on Fluent;
and 5, performing subsequent processing based on Fluent.
The modeling mode in the step 1 comprises the following steps:
step 101, importing a two-dimensional drawing of a paint spraying chamber;
step 102, importing a two-dimensional drawing of a vehicle body;
and 103, generating a three-dimensional model based on SCDM software according to the imported painting room drawing data and the vehicle body drawing data.
Preferably, the dividing of the structure and the grid in step 2 includes the following steps:
step 201, importing the 3D model data obtained by SCDM into ICEM software;
step 202, dividing the paint spraying chamber into a dynamic pressure chamber, a static pressure chamber, a filter bag, a porous baffle, non-woven fabrics, the paint spraying chamber, an operation table, a trolley and an exhaust pipe according to the 3D model structure of the paint spraying chamber;
and 203, dividing the meshes of the spray booth into tetrahedral meshes, dividing the meshes of the vehicle body into triangular meshes, and then finishing the division of the whole meshes.
Preferably, the setting of the medium model in step 3 comprises the following steps:
according to the actual structural characteristics, porous plates, non-woven fabrics, an operation table, cartons and filter bags are set into porous medium models in a paint spraying chamber by Fluent software;
according to the actual structural characteristics, the material parameters of a dynamic pressure chamber, a static pressure chamber, a paint spraying chamber and an air pipe in the paint spraying chamber are set to be air media in Fluent software.
Preferably, the setting of the boundary conditions in step 4 includes setting the inlet, the outlet, the internal face and the wall face.
Preferably, the treatment process in step 5 is as follows:
according to the setting of the medium in the step 3: calculating the speed-pressure drop characteristic, carrying out multiple simulation experiments to obtain the relationship between the flow speed and the pressure drop of the porous medium, namely the resistance characteristic curve of each part, and calculating the resistance characteristic curve according to the formula:
wherein: the C2-inertia resistance coefficient and the 1/alpha-viscous part resistance coefficient of each porous baffle can be obtained by fitting a curve according to the formula;
and (4) setting the number of iteration steps to be 500 steps according to the setting of the boundary conditions in the step (4), and submitting calculation after initialization to obtain a distribution result graph of the air flow speed and the pressure.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a simulation method for air flow speed and pressure intensity of a painting room, which saves a large amount of cost and provides a means for checking a design structure for a designer;
2. the porous medium parameters adopted by the simulation are an equation fitted by a curve obtained by multiple simulation results, and the obtained results of the inertial resistance coefficient and the viscous resistance coefficient are more accurate;
3. the invention can simulate and check the structure for many times rapidly by modifying the parameters;
4. the invention can obtain the change cloud picture of the speed and the pressure of any surface, the result is more visual, and the designer can conveniently refer and change the design.
Drawings
FIG. 1 is a block flow diagram of the steps disclosed in the present invention;
FIG. 2 is a simplified three-dimensional model of the spray booth and vehicle body disclosed herein;
FIG. 3 is a pressure cloud of the spray booth and vehicle body disclosed herein;
FIG. 4 is a graph of the velocity profile of the spray booth and vehicle body of the present disclosure;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-4, the present invention provides a technical solution: a simulation method for airflow speed and pressure of a coating and painting booth is operated based on SCDM (design description language), ICEM (Integrated Circuit engineering) and Fluent software and comprises the following steps:
step 2, dividing a structure and a grid of a 3D model generated by SCDM based on ICEM;
step 3, setting material properties of the grid structure generated by the ICEM based on Fluent;
step 4, setting boundary conditions of the structure and the grid based on Fluent;
and 5, performing subsequent processing based on Fluent.
Specifically, the modeling manner in step 1 includes the following steps:
step 101, importing a two-dimensional drawing of a paint spraying chamber;
step 102, importing a two-dimensional drawing of a vehicle body;
and 103, generating a three-dimensional model based on SCDM software according to the imported painting room drawing data and the vehicle body drawing data.
Specifically, the division of the structure and the grid in step 2 includes the following steps:
step 201, importing the 3D model data obtained by SCDM into ICEM software;
step 202, dividing the paint spraying chamber into a dynamic pressure chamber, a static pressure chamber, a filter bag, a porous baffle, non-woven fabrics, the paint spraying chamber, an operation table, a trolley and an exhaust pipe according to the 3D model structure of the paint spraying chamber;
and 203, dividing the meshes of the spray booth into tetrahedral meshes, dividing the meshes of the vehicle body into triangular meshes, and then finishing the division of the whole meshes.
Specifically, the setting of the medium model in step 3 includes:
according to the actual structural characteristics, porous plates, non-woven fabrics, an operation table, cartons and filter bags are set into porous medium models in a paint spraying chamber by Fluent software;
according to the actual structural characteristics, the material parameters of a dynamic pressure chamber, a static pressure chamber, a paint spraying chamber and an air pipe in the paint spraying chamber are set to be air media in Fluent software.
Specifically, the setting of the boundary conditions in step 4 includes setting the inlet, the outlet, and the internal and wall surfaces.
Specifically, the processing procedure in step 5 is as follows:
according to the setting of the medium in the step 3: calculating the speed-pressure drop characteristic, carrying out multiple simulation experiments to obtain the relationship between the flow speed and the pressure drop of the porous medium, namely the resistance characteristic curve of each part, and calculating the resistance characteristic curve according to the formula:
wherein: the C2-inertia resistance coefficient and the 1/alpha-viscous part resistance coefficient of each porous baffle can be obtained by fitting a curve according to the formula;
and (4) setting the number of iteration steps to be 500 steps according to the setting of the boundary conditions in the step (4), and submitting calculation after initialization to obtain a distribution result graph of the air flow speed and the pressure.
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 simulation method for airflow speed and pressure of a coating and painting booth is operated based on SCDM (design description language), ICEM (Integrated Circuit engineering) and Fluent software, and is characterized by comprising the following steps:
step 1, performing 3D modeling based on SCDM;
step 2, dividing a structure and a grid of a 3D model generated by SCDM based on ICEM;
step 3, setting material properties of the grid structure generated by the ICEM based on Fluent;
step 4, setting the boundary conditions of the grid based on Fluent;
and 5, performing subsequent processing based on Fluent.
2. The method for simulating the air flow speed and the air pressure of the paint spray booth according to claim 1, wherein: the modeling mode in the step 1 comprises the following steps:
step 101, importing a two-dimensional drawing of a paint spraying chamber;
step 102, importing a two-dimensional drawing of a vehicle body;
and 103, generating a three-dimensional model based on SCDM according to the imported painting room drawing data and the vehicle body drawing data.
3. The method for simulating the air flow speed and the air pressure of the paint spray booth according to claim 1, wherein: the division of the structure and the grid in the step 2 comprises the following steps:
step 201, importing the 3D model data obtained by SCDM into ICEM software;
step 202, dividing the paint spraying chamber into a dynamic pressure chamber, a static pressure chamber, a filter bag, a porous baffle, non-woven fabrics, the paint spraying chamber, an operation table, a trolley and an exhaust pipe according to the 3D model structure of the paint spraying chamber;
and 203, dividing the meshes of the spray booth into tetrahedral meshes, dividing the meshes of the vehicle body into triangular meshes, and then finishing the division of the whole meshes.
4. The method for simulating the air flow speed and the air pressure of the paint spray booth according to claim 1, wherein: the setting of the medium model in the step 3 comprises the following steps:
setting porous plates, non-woven fabrics, an operation table, a carton and filter bags in a spray booth as porous medium models based on Fluent software according to actual structural characteristics;
according to the actual structural characteristics, the material parameters of a dynamic pressure chamber, a static pressure chamber, a paint spraying chamber body and an air pipe in the paint spraying chamber are set to be air media in Fluent software.
5. The method for simulating the air flow speed and the air pressure of the paint spray booth according to claim 1, wherein: the setting of the boundary conditions in step 4 includes setting the inlet, the outlet, the internal face and the wall face.
6. The method for simulating the air flow speed and the air pressure of the paint spray booth according to claim 1, wherein: the processing procedure in step 5 is as follows:
according to the setting of the medium in the step 3: calculating the speed-pressure drop characteristic, carrying out multiple simulation experiments to obtain the relationship between the flow speed and the pressure drop of the porous medium, namely the resistance characteristic curve of each part, and calculating the resistance characteristic curve according to the formula:
wherein: the C2-inertia resistance coefficient and the 1/alpha-viscous part resistance coefficient of each porous baffle can be obtained by fitting a curve according to the formula;
and (4) setting the number of iteration steps to be 500 steps according to the setting of the boundary conditions in the step (4), and submitting calculation after initialization to obtain a distribution result graph of the air flow speed and the pressure.
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| CN202110262912.6A CN112966452A (en) | 2021-03-11 | 2021-03-11 | Method for simulating airflow speed and pressure intensity of coating spray booth |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102831271A (en) * | 2012-08-28 | 2012-12-19 | 天津七所高科技有限公司 | Method for optimally designing powder spray room based on fluent software |
| CN109033664A (en) * | 2018-08-07 | 2018-12-18 | 北京建筑大学 | Based on the considerations of the architectural wind environment appraisal procedure of CFD building body draining effect |
| CN110705160A (en) * | 2019-09-27 | 2020-01-17 | 中冶南方都市环保工程技术股份有限公司 | Airflow simulation calculation method of desulfurization and dust removal integrated desulfurization tower |
| CN111760445A (en) * | 2020-06-28 | 2020-10-13 | 淮阴工学院 | Desulfurizing tower flow field simulation method |
| CN112100891A (en) * | 2020-09-15 | 2020-12-18 | 安徽工业大学 | CFD-based resistance calculation method for porous medium in dust holding state |
-
2021
- 2021-03-11 CN CN202110262912.6A patent/CN112966452A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102831271A (en) * | 2012-08-28 | 2012-12-19 | 天津七所高科技有限公司 | Method for optimally designing powder spray room based on fluent software |
| CN109033664A (en) * | 2018-08-07 | 2018-12-18 | 北京建筑大学 | Based on the considerations of the architectural wind environment appraisal procedure of CFD building body draining effect |
| CN110705160A (en) * | 2019-09-27 | 2020-01-17 | 中冶南方都市环保工程技术股份有限公司 | Airflow simulation calculation method of desulfurization and dust removal integrated desulfurization tower |
| CN111760445A (en) * | 2020-06-28 | 2020-10-13 | 淮阴工学院 | Desulfurizing tower flow field simulation method |
| CN112100891A (en) * | 2020-09-15 | 2020-12-18 | 安徽工业大学 | CFD-based resistance calculation method for porous medium in dust holding state |
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Address after: No. 1958, Chuangye street, Changchun automobile economic and Technological Development Zone, Changchun City, Jilin Province, 130011 Applicant after: The Ninth Design and Research Institute of Machinery Industry Co.,Ltd. Address before: No. 1958, Chuangye street, Changchun automobile economic and Technological Development Zone, Changchun City, Jilin Province, 130011 Applicant before: Machinery Industry Ninth Design and Research Institute Co.,Ltd. |
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Application publication date: 20210615 |