用DES方法数值模拟喷流开启/关闭时的流场  

The Numerical Simulation for Lateral Jet Flow During the Jet Opening/Closing Using DES Methods

作　　者：刘学强[1] 李青[2] 柴建忠[2] 伍贻兆[1] 

机构地区：[1]南京航空航天大学空气动力学系,南京210016 [2]第一飞机设计研究院,西安710089

出　　处：《宇航学报》2007年第6期1520-1523,共4页Journal of Astronautics

摘　　要：针对喷流在开启/关闭时的气动特性进行了数值模拟。控制方程为Navier-Stokes方程,其求解采用了基于面的有限体积方法,该离散方法适合任意网格单元。空间离散采用了Osher格式。同时也采用了基于Spalart-Allmaras一方程模型的DES模型。对非定常过程的处理采用了双时间步长。在加速收敛的过程中采用了区域分裂的并行技术,利用METIS进行网格分区,MPI库函数作为并行环境,并采用了非阻断通信来进行区域间的信息交换。对导弹在来流马赫数为6.15时开启/关闭喷流时的流场变化进行了数值模拟,并与实验结果进行了比较。结果显示,该方法对处理此类问题非常有效。The unsteady aerodynamic characteristics of lateral jet flow were studied by the numerical method.The governing equations are Reynolds-averaged Navier-Stokes equations which were solved by the unstructured finite volume method.The upwind Osher scheme was used for spatial discretisation and five-stage Runge-Kutta scheme was applied for temporal discretisation.The DES model based on S-A one equation turbulence model was adopted,and the parallel technique was used to accelerate the computing speed.The missile ...

关 键 词：喷流 DES(Detached EDDY Simulation) 数值模拟 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程]