模型燃烧室两相燃烧大涡模拟的并行计算  

A parallel alogorithm for large eddy simulation of two-phase reacting flows in model combustor

作　　者：颜应文[1] 刘勇[1] 赵坚行[1] 张靖周[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《推进技术》2008年第4期431-437,共7页Journal of Propulsion Technology

基　　金：国家自然科学基金(50176017);高等学校博士学科点专项科研基金(20070287041)

摘　　要：在三维任意曲线坐标系下采用欧拉-拉格朗日两相大涡模拟方法对模型燃烧室气液两相瞬态喷雾燃烧过程进行大涡模拟并行计算研究。通过大涡模拟计算结果与雷诺平均计算结果对比表明大涡模拟方法能更好的模拟流场细观结构。同时分别采用多个处理器和动态内存分配对大涡模拟并行计算程序进行数值模拟,并行计算结果表明:多个处理器之间并行计算结果与PIV测量的瞬态速度场以及出口温度分布实验数据相互吻合,表明采用并行计算和动态内存分配在保证计算结果正确的前提下,大幅度降低计算机内存和大涡模拟计算时间。In three-dimensional arbitrary curvilinear coordinates, an Eulerian-Lagrangian two phase large-eddy simulation （LES） approach and parallel calculation were employed to predict instantaneous gas-liquid two-phase turbulent combustion flows in model combustor. By comparison of LES and RANS results, it shows that the LES approach can get more detailed results. Multiprocessor and dynamic memory-allocating technology were used in large eddy simulation parallel calculation program. Parallel calculation results were agreed well with the instantaneous measurements by PIV system and temperature measurements at the outlet plane. It shows that parallel calculation can greatly reduce computer memory and large eddy simulation time on the premise of the correct result.

关 键 词：大涡模拟 并行计算 动态内存分配 

分 类 号：V235.113[航空宇航科学与技术—航空宇航推进理论与工程]