基于混合动网格的二维非定常粘性流动数值模拟  

Numerical Simulation of Two-Dimensional Unsteady Viscous Flow Based on Hybrid Dynamic Grids

作　　者：邓枫[1] 伍贻兆[1] 刘学强[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2007年第4期444-448,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：利用基于Delaunay三角化的动网格方法,在混合网格上求解了带运动边界的二维非定常Navier-Stokes方程。在有限体积法格心格式的基础上,采用带人工耗散项的Jameson中心格式以及双时间步长推进方法对Navier-Stokes方程中的空间项和时间项分别进行了离散。湍流模型为Spalart-Allmaras方程模型。对在跨声速粘性绕流中进行俯仰振动以及后缘摆动的翼型进行了数值模拟,得到了令人满意的结果。Two-dimensional time-dependent Navier-Stokes equations with moving boundary are solved on hybrid grids by a fast dynamic grid deformation based on delaunay graph mapping. The spatial discretization of the Navier-Stokes equations is performed using the Jameson central scheme with artificial dissipation, and time integration is implemented by the dual time-stepping approach. The Spalart-Allmaras one-equation turbulence model is employed. An airfoil oscillating in pitch and an airfoil with an oscillating flap on the transonic viscous flow are simulated. Results are in agreement with the experimental data.

关 键 词：非定常粘性流动 混合动网格 DELAUNAY三角化 有限体积法 NAVIER-STOKES方程 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]