三维模拟计算中的前后处理方法研究  

Study on Pro-and Post-Processing of Three-Dimension Numerical Simulation

作　　者：金华玉[1,2] 刘忠长[1] 沈照杰[1] 李康[2] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,长春130025 [2]中国第一汽车集团公司技术中心,长春130011

出　　处：《内燃机工程》2010年第5期103-108,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(50676040);国家"九七三"重大基础研究发展规划项目(2007CB210003)

摘　　要：为了提高商用三维模拟计算软件STAR-CD的求解精度和稳定性,自创了CMC-O-grid(cylinder mesh centering-O-grid template)模板,采用此模板切割燃烧室几何生成的网格,在油束通过区域消除了耦合面并能保证良好的网格质量,使得求解稳定性提高,节省了计算时长。采用喷油锥截面和纵截面图相结合的方式展示微观场,以最少的截图展示了更多的信息,具有较高的性价比。为了克服传统后处理分析基本采用微观场图像展示进行定性分析的局限,总结出了一套针对关键单元格集合进行统计的后处理方法,"量"化了微观参数。模拟结果表明了该统计方法有助于揭示微观机理。To improve simulation precision and stability of solution with STAR-CD,the cylinder mesh centering O-grid template（CMC-O-gird template） was created.It was used to cut the geometry of combustion chamber to produce its mesh,thus eliminating the coupling surface in the region the fuel spray passing through and insuring a good mesh quality,so that the solution stability may be improved and the computation time also shortened.The combination of transversal and longitudinal section images of fuel spray was adopted to display microcosmic field,which gave more information with least images.In order to overcome limitation of traditional post-processing methods,namely only microcosmic field images were used to make a qualitative analysis,a set of post-processing method based on key cell set to make quantitative analysis of microcosmic parameters was summarized.The simulation results show this method is helpful to reveal the microcosmic mechanism.

关 键 词：内燃机 CMC-O-grid模板 后处理方法 STAR-CD 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]