Application of large-scale CFD flowfield visualization analysis system
-
摘要: 设计了大规模计算流体动力学(CFD)流场可视化分析系统(FVAS),系统具有完善而实用的大规模三维定常和非定常流场数据预处理与特征提取、体绘制、几何图形(流线、等值面等)绘制、纹理绘制等功能,并提供多种数据分析手段和良好的交互方法.通过8种展示方式、3种显示模式以及5种视图类型展示流场数据内外流结构特征及其复杂的物理现象.同时系统针对时变数据提供动画展示功能并支持单机多核并行.案例分析表明该系统简单实用,通用性高,多种混合绘制技术能够有效展现燃烧室、进气道等流场数据内部反应情况,切面、剖分等交互方式多视图显示局部细节特征,并通过图表、曲线图等分析工具统计分析具体网格单元的信息.完成测试案例300例,与传统CFD软件相比提升70%以上的绘制效率,系统故障率为0.6%,功能事务成功率100%,有效加速对流场数据的分析统计过程.Abstract: A new visualization system for large scale computational fluid dynamics(CFD)flowfield data, called flow field visualization analysis system or FVAS for short, was presented. FVAS has several complete and practical functions such as three dimensional steady and unsteady flow field data preprocessing and feature extraction, volume rendering, glyph (streamline, isosurface, etc) rendering, texture rendering and so on. Many different data analysis methods and favorable interactions were also supported in the system. FVAS could show the inner-outer flow structure characteristics and complicated physical phenomena with eight ways of demonstration, three kinds of display modes and five types of views. FVAS also implemented animation display function for time-varying data and multi-core parallel rendering. Such cases verify that our system is simple, useful, and strongly universal. A variety of mixed rendering technologies can effectively show the internal responses in flow field data such as combustor dataset, air inlet dataset. Interactions including section and subdivision can show local features and details in multiple views, and analysis tools like chart and graph can statistically analyze the information of special grid cell. 300 test cases were completed in our system test. Compared with the traditional CFD software, our system can promote more than 70% rendering efficiency. The system fault rate is 0.6%, transaction success rate is 100%, and it can effectively accelerate the analysis and statistical process of flow field data.
-
[1] 吴颖川,贺元元,贺伟,等.吸气式高超声速飞行器机体推进一体化技术研究进展[J].航空学报,2015,36(1):245-260.WU Yingchuan,HE Yuanyuan,HE Wei,et al.Progress in airframe-propulsion integration technology of air-breathing hypersonic vehicle[J].Acta Aeronautica et Astronautica Sinica,2015,36(1):245-260.(in Chinese) [2] 李思昆,蔡勋,王文珂,等.大规模流场科学计算可视化[M].北京:国防工业出版社,2013. [3] John.计算流体力学基础及其应用[M]. 吴颂平,刘赵淼,译.北京:机械工业出版社,2007. [4] Stole C,Hanrahan P.Polaris:a system for query,analysis and visualization of multi-dimensional relational databases[J].IEEE Transactions on Visualization and Computer Graphics,2002,8(1):52-65. [5] 马千里.CFD非结构网格流场体绘制可视化方法研究[D].长沙:国防科技大学,2012.MA Qianli. Study of the volume rendering visualization for unstructured-grid flow fields from the CFD simulation[D].Changsha:National University of Defense Technology,2012.(in Chinese) [6] Shirley P,Tuchman A.A polygonal approximation to direct scalar volume rendering[J].ACM Siggraph Computer Graphics,1990,24(5):63-70. [7] Callahan S P,Ikits M,Combajld D,et al.Hardware-assisted visibility sorting for unstructured volume rendering[J].IEEE Transactions on Visualization and Computer Graphics,2005,11(3):285-295. [8] Hu J,Wang W K,Ma Q L,et al. Optimization and implementation of unstructured grid volume rendering algorithm[R].Paris:The 2nd International Conference on Computer Application and System Modeling,2012. [9] Mitchell J S B,Silva C T,Farias R,et al.ZSWEEP:an efficient and exact projection algorithm for unstructured volume rendering[R].New York:The 2000 IEEE Symposium on Volume Visualization,2000. [10] Bunyk P,Kaufman A,Silva C T.Simple,fast,and robust ray casting of irregular grids[R].Dagstuhl,Germany:Scientific Visualization Conference,1997. [11] Xu H X,Ma Q L,Li S K,et al.Multi-resolution texture visualization of vector field based on fuzzy feature measurement[J].Engineering and Computer Science,2011,2188(1):504-509. [12] 刘占平,汪国平,董士海.一种新的Volume LIC可视化方法[J].中国图像图形学报,2001,6(5):470-474.LIU Zhanping,WANG Guoping,DONG Shihai.A new method of Volume LIC for 3D vector field visualization[J].Journal of Image and Graphics,2001,6(5):470-474.(in Chinese) [13] 沈恩亚.CFD三维流场数据典型特征交互分析技术的研究与实现[D].长沙:国防科学技术大学,2010.SHEN Enya.Research and implementation of interactive analysis technology for typical characteristics in CFD three-dimensional flow field data[D].Changsha:National University of Defense Technology,2010.(in Chinese) [14] Thomas J J,Cook K A.Illuminating the path:the research and development agenda for visual analytics[M].Richland WA,US:Pacific Northwest National Laboratory,2005. [15] 吴颖川,贺元元,余安远,等.展向截断面乘波压缩前体进气道气动布局研究[J].航空动力学报,2013,28(7):1570-1575.WU Yingchuan,HE Yuanyuan,YU Anyuan,et al.Aerodynamic layout of spanwise truncated curved waverider compression inlet[J].Journal of Aerospace Power,2013,28(7):1570-1575.(in Chinese) [16] Liu Z Q,Sun Z G,Chen H N,et al.Numerical simulation of low-speed combustion using openFOAM on multi-core cluster systems[R].Qinhuangdao,Hebei:The 2th International Conference on Information Computing and Applications,2011.
点击查看大图
计量
- 文章访问数: 821
- HTML浏览量: 2
- PDF量: 11
- 被引次数: 0