圆形射流湍流场的大涡模拟研究  

Study of the Large Eddy Simulation of a Circular Jet

作　　者：赵平辉[1] 叶桃红[1] 朱旻明[1] 陈靖[1] 陈义良[1] 

机构地区：[1]中国科学技术大学,热科学和能源工程系,安徽合肥230027

出　　处：《工程热物理学报》2012年第3期529-532,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50936005);煤燃烧国家重点实验室开放基金资助项目(No.FSKLCC0915);中央高校基本科研业务费专项资助

摘　　要：使用发展的大涡模拟并行程序,数值模拟了圆形射流湍流场,与实验值进行详细比较,对大涡模拟程序进行检验,并分析网格尺度对计算结果的影响。结果表明,大涡模拟计算的平均速度场和雷诺应力场与实验值符合得非常好,验证了该大涡模拟计算程序的可靠性和精确度。同时发现一阶统计矩受网格尺度影响不大,二阶及高阶矩与网格尺度有较大的关系,因此使用大涡模拟方法计算湍流及湍流燃烧问题应对网格依赖性进行必要分析,至少保证二阶统计矩具有较好的精度。The circular jet was numerically simulated by the developed parallel programme based on the large eddy simulation（LES） method.The LES results were compared with the experiments to check the programme and analyze the effects of the mesh scale.The results show that the mean velocity and Reynolds stress calculated by LES agree well with those measured by the experiments and can be proved reliable and precise.The results also show that the mesh scale affects the first standardized moment little but the second and third standardized moments much.So it＇s necessary to analyze the LES results with the dependence on the mesh scale to guarantee the second standardized moment precise at least when simulating the turbulent flow and turbulent combustion.

关 键 词：大涡模拟 圆形射流 亚格子尺度模型 网格尺度 

分 类 号：TK16[动力工程及工程热物理—热能工程]