CN101477708A - Combustion process interactive virtual simulation process oriented to ceramic roller kiln - Google Patents
Combustion process interactive virtual simulation process oriented to ceramic roller kiln Download PDFInfo
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- CN101477708A CN101477708A CNA2009100606379A CN200910060637A CN101477708A CN 101477708 A CN101477708 A CN 101477708A CN A2009100606379 A CNA2009100606379 A CN A2009100606379A CN 200910060637 A CN200910060637 A CN 200910060637A CN 101477708 A CN101477708 A CN 101477708A
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Abstract
The invention relates to a method for interactive and virtual simulation of a combustion process. The method is oriented to a ceramic roller kiln. With the ceramic roller kiln combustion modelling technology, the visualization technology, the virtual reality technology and the numerical calculation technology taken as the core of the method, and VC++ and OpenGL graphics library taken as implementation tools, the method is used for realizing the interactive and virtual simulation of the combustion process in the ceramic roller kiln. Specifically, the method comprises the following steps: 1, an implementation environment is established; 2, the ceramic roller kiln is subjected to three-dimensiontal virtual modelling and displayed; 3, the ceramic roller kiln is subjected to combustion visualization modelling based on a particle system; 4, panoramic and local interactive three-dimensional travellings are made in a combustion space in the ceramic roller kiln; and 5, the three-dimensional dynamic visualization of the combustion process in the ceramic roller kiln is realized. By introducing the visualization technology in a research into the combustion process in the ceramic roller kiln, the invention can ensure that the analysis is more straightforward and in-depth. The invention has the characteristics of good virtual reality, excellent interaction and high practicability.
Description
Technical field
The invention belongs to the crossing domain of building material engineering technology and computer visualization technology, be comprehensive ceramic roller kiln combustion process modeling technique and Computerized three-dimensional visual simulating technology concretely, and a kind of combustion process interactive virtual simulation process towards ceramic roller kiln is provided.
Background technology
Ceramic roller kiln is the novel continuous Industrial Stoves that grow up nearly decades, has been widely used in the commercial production such as architectural pottery, domestic ceramics, sanitary ceramics at present, has represented the developing direction of modern industry kiln.China's roller kilns development at present is swift and violent, and one of research contents that it is important is exactly to study the combustion process of roller kilns, and target is to obtain best roller kilns operating characteristic under emission limit set, fuel economy standard etc. require.And for the roller kilns Study on Combustion Process, be experiment or numerical evaluation all will produce mass data, comprised huge and complicated information in these data, only adopt dependence Simple Calculation instrument and simple simulation method be have very big circumscribed.Visualization technique is as the effective means of understanding complicated phenomenon and data, numeral is converted into how much by symbol, become invisible into as seen, make the researcher can observe their research work, enriched the approach of scientific discovery, give people beyond thought enlightenment, obtained widespread use in the natural science field.
Summary of the invention
The object of the present invention is to provide a kind of combustion process interactive virtual simulation process of realistic strong, characteristics that interactivity is good, practical towards ceramic roller kiln.
To achieve these goals, the method applied in the present invention is: with ceramic roller kiln burning modeling technique, visualization technique, virtual reality technology and numerical computation technology etc. is core, with VC++ and OpenGL shape library is implementation tool, finish the interactive virtual emulation of ceramic roller kiln combustion process, its concrete steps are:
First step: build the realization environment: adopt VC++ constructing system platform and related interfaces, utilize the OpenGL shape library to realize the three-dimensional emulation of ceramic roller kiln combustion process;
Second step: modeling of ceramic roller kiln three-dimensional and demonstration: utilize 3DS MAX to set up ceramic roller kiln kiln body, combustion system, burn till the three-dimensional model of product, and set up relevant virtual emulation scene;
Third step: based on the ceramic roller kiln combustion visualization modeling of particIe system: adopt the particIe system modeling method, and comprehensive flame propagation model, turbulent flow model and three sub-modellings of fuel attribute grid model are based on the ceramic roller kiln combustion visualization model of particIe system, to embody various phenomenons and the characteristic rule in the ceramic roller kiln combustion process;
The 4th step: the panorama of ceramic roller kiln combustion space and local interactive three-dimensional roaming: the observer watches panorama or partial combustion situation in the kiln according to the wish of oneself, and the duty of various device;
The 5th step: the Three-Dimensional Dynamic of ceramic roller kiln combustion process is visual: set up temperature/concentration/speed-color map table, the distribution and the variation of aspects such as the temperature in the demonstration ceramic roller kiln combustion process, product concentration, speed.
Because the present invention introduces visualization technique in the ceramic roller kiln Study on Combustion Process, help it is carried out more directly perceived, deep analysis.The characteristics that the present invention is realistic by force, interactivity is good, practical.
Embodiment
In order to understand the present invention better, further describe the present invention below in conjunction with specific embodiment.
The present invention by realize the building of environment, the modeling of ceramic roller kiln three-dimensional and demonstration, based on the panorama and the local interactive three-dimensional of the ceramic roller kiln combustion visualization modeling of particIe system, ceramic roller kiln combustion space roam, visual four key steps of Three-Dimensional Dynamic of ceramic roller kiln combustion process are constituted.
(1) the realization environment of building method:
The realization of all methods all is to finish in the environment of being built jointly by VC++ and OpenGL shape library.Adopt VC++ constructing system platform and related interfaces, utilize the OpenGL shape library to realize the three-dimensional emulation of ceramic roller kiln combustion process.
(2) virtual modeling of ceramic roller kiln and demonstration:
The three-dimensional virtual scene simulation is to ceramic roller kiln structure, combustion system and burns till product and carry out three-dimensional simulation, can very clearly find out the true apperance of ceramic roller kiln by three-dimensional model, and each part in the model carried out interference checking, see whether assemble success.
Ceramic roller kiln is formed " roller-way " by being arranged in parallel, crossing the high temperature roller rod that the firer makes channel cross-section one by one, and ceramic is placed on the roller-way, is conveyed into kiln along with the rotation of roller, finishes the firing process process in kiln.It mainly is made up of preheating zone, clinkering zone and salband.Wherein, clinkering zone is provided with combustion system, before the clinkering zone to kiln hood partly be the preheating zone, clinkering zone is divided into salband to the kiln afterbody afterwards.
According to true ceramic roller kiln structure, the relative scale between part, position relation utilize 3DSMAX to reconstruct corresponding virtual three-dimensional object entity, form the 3DS file.The main method that adopts create primitives modeling and mesh modeling to combine, and the comparatively complicated combustion system of structure etc. finished modeling by polygonal extruding with the chamfering function, make modeling process more intuitively easy.In order to reach effect true to nature, in 3DS MAX, compose material and use the pinup picture mode.Before pinup picture, handle pinup picture in Photoshop the inside, make picture do not influence under the situation with the aid of pictures as far as possible little.
Because the animation of making of 3DS MAX does not have interactivity, can't control in real time.Be head it off, the present invention converts the 3DS model file to the VC++ code of OpenGL, functions such as display list among the utilization OpenGL import engineering with the ceramic roller kiln model and show, utilize functions such as coordinate transform in the OpenGL shape library, scene rendering, graphic plotting, two buffer memorys again, in the VC++ environment, realize demonstration and control the ceramic roller kiln model.
(3) based on the ceramic roller kiln combustion visualization modeling of particIe system:
The particIe system method is a kind of as the vector field visualization method, often is used in the research to simulating flame.The present invention adopts the particIe system modeling method, and analyzes the combustion characteristics of ceramic roller kiln, realizes the modeling of ceramic roller kiln combustion visualization.
Definition ceramic roller kiln combustion flame particle data structure is a n n dimensional vector n on the real number field, as the formula (1):
Rn＝{Pos，Spe，Aspe，Col，Lif，Alp} (1)
Wherein, Rn represents a certain flame particle vector, Pos, and Spe, Aspe, Col, Lif, Alp are respectively locus, movement velocity, acceleration, color, life-span, the desalination speed of particle.Flame particle collection is defined as the finite aggregate of above-mentioned flame particle, and wherein each particle all has above-mentioned these genus matter and states, and all these attributes all are the functions of time t.
Based on the ceramic roller kiln combustion visualization modeling of particIe system, combine the foundation and the implementation procedure of flame propagation Visualization Model, flow-field visualized model and three submodels of fuel attribute Visualization Model.
Ceramic roller kiln burned flame particle with burner place kindling point as the generation source, a plurality of flame particles erupt out from the generation source, form sphere flame and propagate forward, its velocity of propagation can obtain by the turbulent combustion Model Calculation, and the flame particle has the average velocity that moves along the spherical radius direction; In motion process, the vital values of flame particle causes the variation of attributes such as brightness and transparency simultaneously in continuous variation, and chamber wall is carried out collision detection; Burner place fuel spray phenomenon can be thought to be made of liquid mist particle, and the mist bundle has certain geometrical shape and motion feature, can adopt the particIe system method to express equally.
Have the air motion phenomenon in combustion process, flow-field visualized model is simulation and structure flow field on the basis of analytic combustion turbulent air flow feature.The principal character of turbulent motion is the motion in whirlpool in the fluid, and the turbulent flow flow field is reduced to the turbulent flow vorticity field, adopts to generate the method stream field modeling of turbulent flow vorticity field at random; After generating the turbulent flow vorticity field, in the flow field move to the additional panting action (being fluctuation velocity) of flame particle in the whirlpool, and the air-flow phenomenon is passed through the motion of the particIe system that constitutes flame propagation is changed embodiment; Power this effect in whirlpool is instantaneous, and the every fortune of particle moves a step, and the whirlpool effect size that is subjected to is inequality, must recomputate the fluctuation velocity that it is subjected to.
The flame front that the flame particIe system constitutes will cause the variation of fuel attribute status in propagating expansion process, fuel changes products of combustion into by unreacted fuel gas, and its temperature of carrying and CONCENTRATION DISTRIBUTION information also change simultaneously.The grid cell model is adopted in the distribution of fuel, and it is discrete for a series of volume mesh unit to be about to the combustion space, has the fuel of certain mass in each grid cell, and has attributes such as temperature, concentration, speed, color and transparency; Judge the grid cell that the flame particle arrives, and the change value of fuel temperature, concentration and speed in the computing grid, by the color of grid body unit and the display properties of transparency temperature, concentration and velocity information are expressed.
(4) panorama of ceramic roller kiln combustion space and local interactive three-dimensional roaming
The three-dimensional panorama figure and the local figure that show the ceramic roller kiln combustion space, and, be implemented in roaming wherein according to the dynamic change of viewpoint requirement Real Time Drive virtual scene, be another enforcement emphasis of the present invention.Carry out observability at pretreatment stage and judge, improve display speed by sightless object in the displayed scene not.Can adopt the zoning to block judgement, that is: store a hiding relation table earlier, in the simulation cycles process, carry out the judgement of hiding relation by real-time inquiry hiding relation table.
When implementing the interactive three-dimensional roaming, the observer can control position, direction and the reference point of viewpoint by mouse or keyboard.When position, direction and the reference point of viewpoint changed, change had also taken place with respect to observer's orientation in the object in the scene, thereby had produced " innervation ".Except utilizing keyboard and mouse to realize the interactive walkthrough control of ceramic roller kiln combustion space, also designed the automatic playing function of scene.By automatic playing function, the understanding that naive user can be quickly and easily has individual summary to the various piece and the calcination equipment of ceramic roller kiln.
(5) Three-Dimensional Dynamic of ceramic roller kiln combustion process is visual
For the conveniently expression of temperature, concentration and velocity in the flame propagation process, need set up temperature-color map table, concentration-color map table and speed-color map table.For reducing real-time complexity of calculation, set up the palette of oneself, the color that needs are used all is put in the palette, and sets up corresponding temperature, concentration and speed index value, can improve system's operation efficiency.Every kind of color in the palette comprises the temperature index value of a rgb value and a correspondence, represent with the set form, and assumed temperature/concentration/speed and color are to gather one to one, according to certain funtcional relationship, the arbitrary temp value can be hinted obliquely at the respective color value on the palette, thereby when particle movement, the variation of temperature/concentration/speed can be embodied on the change in color at any time, comes out with more intuitive formal representation.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (1)
1, a kind of combustion process interactive virtual simulation process towards ceramic roller kiln, the method that is adopted is: with ceramic roller kiln burning modeling technique, visualization technique, virtual reality technology and numerical computation technology etc. is core, with VC++ and OpenGL shape library is implementation tool, finish the interactive virtual emulation of ceramic roller kiln combustion process, its concrete steps are:
First step: build the realization environment: adopt VC++ constructing system platform and related interfaces, utilize the OpenGL shape library to realize the three-dimensional emulation of ceramic roller kiln combustion process;
Second step: modeling of ceramic roller kiln three-dimensional and demonstration: utilize 3DS MAX to set up ceramic roller kiln kiln body, combustion system, burn till the three-dimensional model of product, and set up relevant virtual emulation scene;
Third step: based on the ceramic roller kiln combustion visualization modeling of particIe system: adopt the particIe system modeling method, and comprehensive flame propagation model, turbulent flow model and three sub-modellings of fuel attribute grid model are based on the ceramic roller kiln combustion visualization model of particIe system, to embody various phenomenons and the characteristic rule in the ceramic roller kiln combustion process;
The 4th step: the panorama of ceramic roller kiln combustion space and local interactive three-dimensional roaming: the observer watches panorama or partial combustion situation in the kiln according to the wish of oneself, and the duty of various device;
The 5th step: the Three-Dimensional Dynamic of ceramic roller kiln combustion process is visual: set up temperature/concentration/speed-color map table, the distribution and the variation of aspects such as the temperature in the demonstration ceramic roller kiln combustion process, product concentration, speed.
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| CNA2009100606379A CN101477708A (en) | 2009-01-23 | 2009-01-23 | Combustion process interactive virtual simulation process oriented to ceramic roller kiln |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102682472A (en) * | 2012-05-07 | 2012-09-19 | 电子科技大学 | Particle effect visual synthesis system and method |
| CN103700127A (en) * | 2013-09-02 | 2014-04-02 | 西安工程大学 | Rapid generating method for ancient site virtual scene based on virtual reality technology |
| CN107346353A (en) * | 2017-06-05 | 2017-11-14 | 民政部零研究所 | A kind of solid burning article combustion process emulation mode and server |
| CN111145358A (en) * | 2018-11-02 | 2020-05-12 | 北京微播视界科技有限公司 | Image processing method, device and hardware device |
| CN113536641A (en) * | 2021-07-28 | 2021-10-22 | 华能巢湖发电有限责任公司 | Immersive interactive software system of power station boiler transfer equipment based on virtual environment technology |
-
2009
- 2009-01-23 CN CNA2009100606379A patent/CN101477708A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102682472A (en) * | 2012-05-07 | 2012-09-19 | 电子科技大学 | Particle effect visual synthesis system and method |
| CN103700127A (en) * | 2013-09-02 | 2014-04-02 | 西安工程大学 | Rapid generating method for ancient site virtual scene based on virtual reality technology |
| CN107346353A (en) * | 2017-06-05 | 2017-11-14 | 民政部零研究所 | A kind of solid burning article combustion process emulation mode and server |
| CN107346353B (en) * | 2017-06-05 | 2020-07-03 | 民政部一零一研究所 | Solid comburent combustion process simulation method and server |
| CN111145358A (en) * | 2018-11-02 | 2020-05-12 | 北京微播视界科技有限公司 | Image processing method, device and hardware device |
| CN111145358B (en) * | 2018-11-02 | 2024-02-23 | 北京微播视界科技有限公司 | Image processing method, device and hardware device |
| CN113536641A (en) * | 2021-07-28 | 2021-10-22 | 华能巢湖发电有限责任公司 | Immersive interactive software system of power station boiler transfer equipment based on virtual environment technology |
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Application publication date: 20090708 |