CN107092713A - A kind of impacting jet ventilating system optimization method based on ANSYS softwares - Google Patents
A kind of impacting jet ventilating system optimization method based on ANSYS softwares Download PDFInfo
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- CN107092713A CN107092713A CN201710144750.XA CN201710144750A CN107092713A CN 107092713 A CN107092713 A CN 107092713A CN 201710144750 A CN201710144750 A CN 201710144750A CN 107092713 A CN107092713 A CN 107092713A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
Abstract
The present invention relates to a kind of impacting jet ventilating system optimization method based on ANSYS softwares.The present invention passes through Data Collection, data processing, geometrical model, mesh generation, numerical computations, the big flow of interpretation of result six, according to the data of collection, the threedimensional model using impacting jet ventilating system office is set up in ICEM softwares, and mesh generation is carried out to model, boundary condition is defined, import FLUENT softwares to calculate, obtain indoor velocity field and the temperature field under different parameters.Instant invention overcomes the defect that the multiple technologies mode of existing ventilating system technical field is individually present.Present invention determine that the possibility working range for the parameter studied, to ensure that good thermal comfort, there is provided the reference data of system optimization, is conducive to promoting the development and application of impacting jet ventilating system.
Description
Technical field
The present invention relates to impacting jet ventilating system, more particularly to a kind of impacting jet ventage based on ANSYS softwares
System optimization method.
Background technology
Before the present invention makes, ventilating system technical field has formd multiple technologies mode.As mixed ventilation is sent
Wind velocity is larger, both can with cooling can also heat supply, but mixed ventilation air quality is poorer than replacement aeration, with relatively low ventilation
Efficiency and Energy Efficiency Ratio.In the energy crisis of the seventies so that mixed ventilation way is faced with severe tests.Replacement aeration is in upper
The eighties in century originates from Northern Europe, and it is to send into the air of low-momentum from room bottom, in Near Ground formation layer
" air lake ", the air of diffusion runs into indoor airflow and produces upward convection current and arrange the air of pollution from room top
The process gone out.But its very big shortcoming is the heating system for being only used for cold supply system and cannot be used for room.Furthermore, work as room
Between span it is very wide when so that the use of this air supply mode is also very restricted.
The content of the invention
The purpose of the present invention, which is that, overcomes drawbacks described above, develops a kind of impacting jet ventage based on ANSYS softwares
System optimization method.
The technical scheme is that：
A kind of impacting jet ventilating system optimization method based on ANSYS softwares, it is mainly characterized by, and step is such as
Under：
(1) Data Collection, that is, collect the room-sized on impacting jet ventilating system threedimensional model, personnel amount, set
Standby power, air-supply mouth-shaped and size, air outlet height off the ground, air-supply wind speed and wind pushing temperature parameter；
(2) data processing, i.e., the parameter that different threedimensional models are carried out to collecting data is arranged, and determines the room of model
Size, personnel amount and plant capacity, and air-supply mouth-shaped and size, air outlet height off the ground, air-supply wind speed and air-supply temperature
Spend the excursion of parameter；
(3) geometrical model, i.e., to carrying out three-dimensional modeling using the room of impacting jet ventilating system；
(4) mesh generation, i.e., carry out mesh generation to threedimensional model, and self-inspection optimization is carried out to grid, is converted into permanent
Grid；
(5) numerical computations, i.e. setting physical property, boundary condition, operating condition, pressure-velocity coupling process and discrete method,
Solve control parameter, solve monitor and initialization computational fields, start to solve, confirm convergence；
(6) interpretation of result, i.e. importing the poster processing soft obtain indoor velocity field and the temperature field under different parameters.
The step (3) is using ICEM softwares come to carrying out three-dimensional modeling using the room of impacting jet ventilating system；Step
It is rapid as follows：
(3-1) determines the three-dimensional coordinate on six summits of cuboid according to the appearance and size in room；According to the profile of ajutage
Size, determines the three-dimensional coordinate on each summit；The personnel of sitting posture are reduced to cuboid, it is determined that representing several length of all personnel
The apex coordinate of cube；Computer is reduced to cuboid, it is determined that representing the apex coordinate of several cuboids of computer；Determine return air
The positions and dimensions of mouth, thus obtain the coordinate on four summits；
After (3-2) creates the institute of solid a little in ICEM softwares, with the bundle of lines, they are connected.With such
Push away, after all solids are all showed with Points And lines, the line existed is generated plane.
The step (4) determines which partly needs to use structured grid, and which partly uses unstrctured grid；
6. a kind of impacting jet ventilating system optimization method based on ANSYS softwares according to claim 3, it is special
Levy and be, be in the step (4), the step of partition structure meshing：Block divides, creates topological structure, divides O-grid
The associative operation of block and topologies adjusting；Divide unstrctured grid part the step of be：Auto Mesh Algorithm, trellis-type,
Global grid parameter, Local grid control, is carried out with density box local cypher, run Octree algorithms, check grid sectional drawing,
Mesh quality is checked, Mesh smoothing and other grids control option；Setting grid output solver, the title of specified boundary,
The boundary condition on each title border is specified, facilitates the border in subsequent simulation solution procedure to input.
In step (5) numerical computations, the grid file of ICEM outputs is read in FLUENT softwares, grid is checked,
Set and calculate domain sizes, setting is general to solve parameter and turbulence model.
Advantages of the present invention and effect are indoor velocity field and the temperature field obtained according to the poster processing soft, it is determined that being ground
The possibility working range for the parameter studied carefully, to ensure good thermal comfort.Generally speaking, this method is in office environment
Impacting jet ventilating system design there is provided the reference data of system optimization, be conducive to promoting impacting jet ventilating system
Development and application.
The advantage further illustrated and effect of the present invention will continue below.
Brief description of the drawings
Fig. 1 --- schematic flow sheet of the present invention.
Embodiment
The present invention technical thought be：
For the complicated feature of impacting jet ventilating system, pass through Data Collection --- data processing --- geometry mould
--- the big flow of mesh generation --- numerical computations --- interpretation of result six, according to the data of collection, builds type in ICEM softwares
The vertical threedimensional model using impacting jet ventilating system office, and mesh generation is carried out to model, boundary condition is defined, import
FLUENT softwares are calculated, and data and chart visual and clear, that be easy to exchange are obtained using the poster processing soft.So as to be penetrated for collision
Wind system optimization of circulating provides new thinking.
As shown in figure 1, by taking the optimization of some impacting jet ventilating system as an example.
The first step：Data Collection.
In the present invention, Data Collection is mainly looking into for documents and materials and taken.For impacting jet ventilating system, in Hownet and
Related Chinese and English document is searched on the platforms such as Web of Science.Collect the room on impacting jet ventilating system threedimensional model
Between size, personnel amount, plant capacity, air-supply mouth-shaped and size, air outlet height off the ground, blow wind speed and wind pushing temperature etc.
Parameter.
Second step：Data processing.
Data collection effort carries out systematization combing after completing it is necessary to provide data information to correlation.According to follow-up three-dimensional
The need for modeling work, the parameter for the different threedimensional models collected in advance is arranged.The room of model is determined after com-parison and analysis
Between physical dimension be 4.2m × 3.6m × 2.5m, one people of setting, a computer, ceiling light and air-supply arrangement in room.
The air handled well is supplied by airduct and sent out above floor with certain height H, and room air is from positioned at same
Exhaust outlet discharge below ceiling on the wall of side.Air-supply mouth-shaped is divided into the rectangle that area is 0.01667, square, semiellipse
Shape, rectangle is 0.169m × 0.098m, and square is 0.129m × 0.129m, and half elliptic is a=0.2044m, b=0.1035m.
Air outlet height off the ground is 0.4m, 0.8m and 1.2m.Air output is 0.02,0.025 and 0.03.Wind pushing temperature is 14 DEG C, 16 DEG C
With 18 DEG C.
3rd step：Geometrical model
The present invention is using ICEM softwares come to carrying out three-dimensional modeling using the room of impacting jet ventilating system.According to by upper
And under, from outside to inside, the principle that goes from the simple to the complex carry out three-dimensional modeling.The first step, according to the appearance and size in room, determines cuboid
The three-dimensional coordinate on six summits；According to the appearance and size of ajutage, the three-dimensional coordinate on each summit is determined；By personnel's letter of sitting posture
Turn to several cuboids to be spliced, it is determined that representing the apex coordinate of several cuboids of personnel；Computer is reduced to cuboid,
It is determined that representing the apex coordinate of several cuboids of computer；The positions and dimensions of return air inlet are determined, four summits are thus obtained
Coordinate.Second, after the institute of solid is created in ICEM softwares a little, with the bundle of lines, they are connected.With such
Push away, after all solids are all showed with Points And lines, the line existed is generated plane.So far, geometry mould
Type creates completion substantially.
4th step：Mesh generation
The rudimentary model completed for step 3, needs further to carry out self-inspection optimization to it.To air outlet and heating target
Structured grid is used to reduce number of grid.Some regions grid distribution, such as at wall and heating object table
Face, it should with precipitous speed and thermograde, based on being built in checking research with the grid that optimal placement is identified.Meter
Domain is calculated to be mainly around hexahedron element, half elliptic air outlet with the presence of some mixing Shape Elements.For all situations production
Raw total size of mesh opening is included in 903-957 unit at air outlet from 410 to 4,300,000.
5th step：Numerical computations
The grid file of ICEM outputs is read in FLUENT softwares, grid is checked, confirmed without negative volume.In FLUENT
Set and calculate domain sizes, it is considered to whether computational fields are zoomed in and out with processing.Air-flow and temperature in room by quality, momentum and
Law of conservation of energy is described, wherein flowing is assumed the incompressible turbulent flow of three-dimensional steady state.The equation of momentum includes buoyancy effect,
Density is determined by incompressible perfect gas law, density is only varied with temperature and changed.Examined by discrete coordinates (DO) model
Radiant heat is considered.Turbulent flow is modeled with turbulence model.In order to solve equation group, define with downstream condition：In air outlet
Place there is provided uniform speed and temperature field, and using 10% turbulence intensity come determine Turbulent Kinetic k, turbulence dissipation rate ε and
Velocity variance.At exhaust outlet, outlet pressure is assumed zero meter pressure.All inner surfaces in room are both configured to Antiskid wall.
All surface is assumed to the grey that emissivity is 0.9.Governing equation separation scheme and SIMPLE algorithm couples pressure and speed
Solve.On discretization, calculate nonlinear terms using Second-order Up-wind form and calculate viscosity using Second-Order Central Difference form
, and calculate pressure term using PRESTO (pressure segmentation option) scheme.The convergent standard of numerical value is variable p, u, v, w, k,
Maximum relative different between ε, and f subsequent iteration twice is less than.Convergence on energy is that residual is less than.This
Outside, the error of total mass flow rate and heat flux balance is calculated, they are respectively smaller than 0.03% and 0.3%.
6th step：Interpretation of result
Importing the poster processing soft obtains indoor velocity field and temperature field under different parameters.
Claims (5)
1. a kind of impacting jet ventilating system optimization method based on ANSYS softwares, it is characterised in that step is as follows：
(1) Data Collection, that is, collect the room-sized on impacting jet ventilating system threedimensional model, personnel amount, equipment work(
Rate, air-supply mouth-shaped and size, air outlet height off the ground, air-supply wind speed and wind pushing temperature parameter；
(2) data processing, i.e., the parameter that different threedimensional models are carried out to collecting data is arranged, and determines the room chi of model
Very little, personnel amount and plant capacity, and air-supply mouth-shaped and size, air outlet height off the ground, air-supply wind speed and wind pushing temperature
The excursion of parameter；
(3) geometrical model, i.e., to carrying out three-dimensional modeling using the room of impacting jet ventilating system；
(4) mesh generation, i.e., carry out mesh generation to threedimensional model, carries out self-inspection optimization to grid, is converted into permanent grid；
(5) numerical computations, that is, set physical property, boundary condition, operating condition, pressure-velocity coupling process and discrete method, solution
Control parameter, solution monitor and initialization computational fields, start to solve, confirm convergence；
(6) interpretation of result, i.e. importing the poster processing soft obtain indoor velocity field and the temperature field under different parameters.
2. a kind of impacting jet ventilating system optimization method based on ANSYS softwares according to claim 1, its feature exists
In the step (3) is using ICEM softwares come to carrying out three-dimensional modeling using the room of impacting jet ventilating system；Step is such as
Under：
(3-1) determines the three-dimensional coordinate on six summits of cuboid according to the appearance and size in room；According to the profile chi of ajutage
It is very little, determine the three-dimensional coordinate on each summit；The personnel of sitting posture are reduced to cuboid, it is determined that representing the several rectangular of all personnel
The apex coordinate of body；Computer is reduced to cuboid, it is determined that representing the apex coordinate of several cuboids of computer；Determine return air inlet
Positions and dimensions, thus obtain the coordinate on four summits；
After (3-2) creates the institute of solid a little in ICEM softwares, with the bundle of lines, they are connected.By that analogy,
After all solids are all showed with Points And lines, the line existed is generated plane.
3. a kind of impacting jet ventilating system optimization method based on ANSYS softwares according to claim 1, its feature exists
In the step (4) determines which partly needs to use structured grid, and which partly uses unstrctured grid.
4. a kind of impacting jet ventilating system optimization method based on ANSYS softwares according to claim 3, its feature exists
In being in the step (4), the step of partition structure meshing：Block divide, create topological structure, divide O-grid blocks and
The associative operation of topologies adjusting；Divide unstrctured grid part the step of be：Auto Mesh Algorithm, trellis-type, the overall situation
Mesh parameter, Local grid control, local cypher, operation Octree algorithms are carried out with density box, grid sectional drawing, grid is checked
Quality examination, Mesh smoothing and other grids control option；Grid output solver is set, the title of specified boundary is specified
The boundary condition on each title border, facilitates the border in subsequent simulation solution procedure to input.
5. a kind of impacting jet ventilating system optimization method based on ANSYS softwares according to claim 1, its feature exists
In in step (5) numerical computations, the grid file of reading ICEM outputs, checks grid, set meter in FLUENT softwares
Domain sizes are calculated, setting is general to solve parameter and turbulence model.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109635394A (en) * | 2018-11-30 | 2019-04-16 | 深圳中广核工程设计有限公司 | A kind of method and device judging automatically high energy pipeline breaking range target safety |
| CN111222210A (en) * | 2019-12-12 | 2020-06-02 | 合肥通用机械研究院有限公司 | Micro-channel unit CFD fluid-solid coupling unstructured grid automatic generation method |
| CN111666723A (en) * | 2020-05-23 | 2020-09-15 | 上海海洋大学 | Large-space all-air conditioning system optimization design method based on numerical simulation |
| CN113128137A (en) * | 2021-04-06 | 2021-07-16 | 中国辐射防护研究院 | Design method and device of radioactive contamination ventilation protective clothing |
| CN113158593A (en) * | 2021-04-13 | 2021-07-23 | 中南建筑设计院股份有限公司 | Intelligent design method of hospital ward ventilation system based on artificial intelligence |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633827A (en) * | 2014-11-26 | 2015-05-20 | 东华大学 | Optimized design method for impacting jet ventilation system |
| CN104834778A (en) * | 2015-05-04 | 2015-08-12 | 北京工业大学 | Method for optimizing control parameters of ventilation and air conditioning system of subway station |
-
2017
- 2017-03-06 CN CN201710144750.XA patent/CN107092713A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633827A (en) * | 2014-11-26 | 2015-05-20 | 东华大学 | Optimized design method for impacting jet ventilation system |
| CN104834778A (en) * | 2015-05-04 | 2015-08-12 | 北京工业大学 | Method for optimizing control parameters of ventilation and air conditioning system of subway station |
Non-Patent Citations (2)
| Title |
|---|
| 晋欢欢: "射流通风室内气流组织的数值研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 蒋昌波等: "孤立波作用下排柱附近流动特性数值分析", 《浙江大学学报（工学版）》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109635394A (en) * | 2018-11-30 | 2019-04-16 | 深圳中广核工程设计有限公司 | A kind of method and device judging automatically high energy pipeline breaking range target safety |
| CN109635394B (en) * | 2018-11-30 | 2023-03-17 | 深圳中广核工程设计有限公司 | Method and device for automatically judging safety of target material in high-energy pipeline rupture range |
| CN111222210A (en) * | 2019-12-12 | 2020-06-02 | 合肥通用机械研究院有限公司 | Micro-channel unit CFD fluid-solid coupling unstructured grid automatic generation method |
| CN111666723A (en) * | 2020-05-23 | 2020-09-15 | 上海海洋大学 | Large-space all-air conditioning system optimization design method based on numerical simulation |
| CN113128137A (en) * | 2021-04-06 | 2021-07-16 | 中国辐射防护研究院 | Design method and device of radioactive contamination ventilation protective clothing |
| CN113158593A (en) * | 2021-04-13 | 2021-07-23 | 中南建筑设计院股份有限公司 | Intelligent design method of hospital ward ventilation system based on artificial intelligence |
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