【作者】 宋扬；

【导师】 靖固；

【作者基本信息】 哈尔滨理工大学 ， 计算机软件与理论， 2011， 硕士

【摘要】 近些年来,随着可视化技术的不断发展,视觉思维在科学研究中发挥着越来越重要的作用。石油工业中采用注水开采的方式使得输油管中常有油和水混合物形式的两相流,这种流动现象出现在密闭管道内,无法直接观察到。如果能将这种流动现象可视化,使大量监测数据转化成图形图像,便可激发人的形象思维,将复杂原理和规律变得易于理解,为科学发现和控制决策提供可视化信息。本文在研究了可视化仿真技术的基础上,总结了以往可视化仿真结果的不足,提出了新的仿真方案。首先在3DMAX软件中建立水平圆形管道的三维模型,由于模型的质量直接影响仿真试验的结果,所以采用放样建模、复合体建模等技术建立起石油管道三维模型,对模型进行纹理、颜色、光照等处理,同时设置目标摄影机记录粒子动画;其次应用粒子系统来模拟油水两相流流动状态,创建粒子系统发射器,使每个粒子呈现不同的运动状态和属性,再应用MAXScript脚本语言对粒子系统加以控制和参数调整,以便更好的发挥粒子系统的功能。在建模、渲染、建立粒子系统之后形成的两相流流型还只是雏形不能达到真实的效果,为弥补稀疏矩阵图像质量不高的问题,应用散乱数据可视化的Multi Quardric插值算法加强图像细节显示,最后再次渲染输出动画。从仿真结果来看,该方案能够比较生动的反映出石油管道中油水两相流的流动形态。为了使两相流系统可视化在性能分析方面取得更好的效果,针对这一问题使用目前比较流行的流体工程计算分析软件FLUENT,去做油水两相流流动计算。通过建立物理模型和数学模型,经迭代运算及后处理输出显示能很好的解决管道内两相流的计算分析问题,得到了流场的流速、压力分布、混合相分布等输出数据。两种方案结合不仅为现场作业提供了生动画面,又提供了相应的输出数据,增强了系统交互性。更多还原

【Abstract】 Visualization technology has developed continuously in recent years, visual thinking plays a more and more important role in scientific research.Petroleum industries usually takes an aproach by using water injection mining so that oil and water mixture has been transmitted in form of two-phase flow in the pipline.This kind of flow phenomenon seems to commonly appear in the airtight pipe, but that cannot be directly observed. If we can realize the visualization of this flow phenomena, change lots of monitoring data into image, which can inspire people’s image thinking and make complex principles and rules become easy to understand.It also provides visual information for scientific discovery and control decision. Therefore the key task of the study is how to realize the two-phase flow visualization.This paper puts forward a new simulation schemes based on the study of the visual simulation technology and summarize the other technology tried on the basis of insufficient.Firstly, establish horizontal circular pipe of 3d model in 3DMAX software. For the model of quality directly impact simulation test results, so i use lofting modeling, complex modeling technology to establish the oil pipeline, which is the initial model of 3d model.Then i do the process of texture, color, light to the model and set goals handling camera which documents particles of animation; Secondly i use particle system to simulate water-oil two phase flow state, create particle system launcher, make each particle presents different state of motion and attributes. Applicate MAXScript scripting language to make paticle system controlled and debugged, which also in order to make good use of particle system function. After process of modeling, rendering, establishing particle system,the formation of two-phase flow pattern is still cannot achieve real effect rudiment.So as to solove the problem of low image quality of redressing sparse matrix, applicate scattered data visualization of Multi Quardric interpolation algorithm to enhence image detail.Lastly i make another render to output animation. Judging from the simulation results, this scheme can reflect oil pipeline oil-water two-phase flow patterns vividly. So as to achieved better effect on the performance analysis of two phase flow visualization system. I use popular fluid engineering calculation analysis software FLUENT according to this problem. That is why i choose it to do water-oil two phase flow calculation. Through the establishment of physical model and mathematical model, the iterative computing and post-treatment.The output shown can solve pipe two-phase flow calculation analysis problem better and obtain the flow field of flow velocity and pressure distribution, mixing and phase distribution etc output data. Two schemes combined not only provide vivid images for on-site, but also provide corresponding output data, and enhance interaction of the system.更多还原